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213.
If the Crown Fits: Sterically Demanding N-Heterocyclic Carbene Promotes the Formation of Au8Pt Nanocluster
Joseph F. DeJesus, Samuel I. Jacob, Quan Manh Phung, Koichi Mimura, Yoshitaka Aramaki, Takashi Ooi, Masakazu Nambo, Cathleen M. Crudden
J. Am. Chem. Soc. 2024, 146, 23806-23813.
DOI: 10.1021/jacs.4c04873
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212.
p-Diarylboryl Halothiophenols as Multifunctional Catalysts via Photoactive Intramolecular Frustrated Lewis Pairs
Takeru Kikura, Yuysa Taura, Yoshitaka Aramaki, and Takashi Ooi
J. Am. Chem. Soc. 2024, 146, 20425-20431.
DOI: 10.1021/jacs.4c06122
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211.
Catalytic 1,1-Cyanoalkylation of Electron-Deficient Olefins
Kohsuke Ohmatsu, Duc An Truong, Shohei Morita, Keiji Maruoka, and Takashi Ooi
Org. Lett. 2024, 26, 4055-4058.
DOI: 10.1021/acs.orglett.4c00866
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210.
Zwitterionic Acridinium Amidate: A Nitrogen-Centered Radical Catalyst for Photoinduced Direct Hydrogen Atom Transfer
Lukas Entgelmeier, Soichiro Mori, Shion Sendo, Rie Yamaguchi, Ryuhei Suzuki, Takeshi Yanai, Olga García Mancheño, Kohsuke Ohmatsu, Takashi Ooi
RhemRxiv. 2023
DOI: 10.26434/chemrxive-2023-pj884
Angew. Chem. Int. Ed. 2024, e202404890
DOI: 10.1002/anie.202404890
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209.
Excited-state tris(pentafluorophenyl)borane as a strong single-electron oxidant: Photophysical properties and catalysis
Yoshitaka Aramaki, Yuki Uchida, Ryo Ishikawa, and Takashi Ooi
J. Photochem. Photobio. 2023, 18, 100206.
DOI: 10.1016/j.jpap.2023.100206
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208.
Catalytic Formal Carbyne Transformation of Phosphorus Ylides
Ryuhei Suzuki, Taiga Ando, Fritz Deufel, Kohsuke Ohmatsu, and Takashi Ooi
ChemRxiv 2023
DOI: 10.26434/chemrxiv-2023-mx0vg
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207.
Zwitterionic Diphenylphosphinyl Amidate as a Powerful Photoinduced Hydrogen-Atom-Transfer Catalyst for C-H Alkylation of Simple Alkanes
Kohsuke Ohmatsu, Ryuhei Suzuki, Hiroki Fujira, and Takashi Ooi
J. Org. Chem. 2023, 88, 6553-6556.
DOI: 10.1021/acs.joc.2c02362
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206.
Hydrogen-Atom Transfer Catalysis for C-H Alkylation of Benzylic Fluorides
Kohsuke Ohmatsu, Hiroki Fujira, Ryuhei Suzuki, and Takashi Ooi
Org. Lett. 2022, 24, 3134-3137.
DOI: 10.1021/acs.orglett.2c00817
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205.
Thioamidate Ion as Effective Cocatalystfor Photoinduced C-H Alkylation via Multisite Proton-coupled Electron Transfer
Kohsuke Ohmatsu, Haruka fujimori, Kodai Minami, Kosuke Nomura, Mari Kiyokawa, and Takashi Ooi
Chem. Lett. 2022, 51, 445-447.
DOI: 10.1246/cl.220026
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204.
In Silico Analysis and Synthesis of Nafamostat Derivatives and Evaluation of Their Anti-SARS-CoV-2 Activity
Kazuhiro J. Fujimoto, Daniel C. F. Hobbs, Miki Umeda, Akihiro Nagata, Rie Yamaguchi, Yoshitaka Sato, Ayato Sato, Kohsuke Ohmatsu, Takashi Ooi, Takeshi Yanai, Hiroshi Kimura, Takayuki Murata
Viruses 2022, 14, 389.
DOI: 10.3390/v14020389
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203.
Hydrogen-Atom-Transfer-Mediated Acceptorless Dehydrogenative Cross-Coupling Enabled by Multiple Catalytic Functions of Zwitterionic Triazolium Amidate
Kodai Minami, Kohsuke Ohmatsu, and Takashi Ooi
ACS Catal. 2022, 12, 1971-1976
DOI: 10.1021/acscatal.1c05604
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202.
Catalytic Asymmetric Strecker Reaction of Ketoimines with Potassium Cyanide
Kohsuke Ohmatsu, Yusuke Morita, Mari Kiyokawa, Kimihiro Hoshino, and Takashi Ooi
Asian J. Org. Chem. 2021, 10, 3237-3240
DOI: 10.1002/ajoc.202100608
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201.
o-Quinone methide with overcrowded olefinic core as a catalytically-active surrogate of triarylmethylium salt for dehydridative oxidationof benzylic alcohols under aerobic photoirradiation conditions
Kohsuke Kato, Daisuke Uraguchi, and Takashi Ooi
Tetrahedron 2021, 100, 132459
DOI: 10.1016/j.tet.2021.132459
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200.
Catalytic Asymmetric Cyanoalkylation of Electron-Deficient Olefins with Potassium Cyanide and Alkyl Halides
Kohsuke Ohmatsu, Yusuke Morita, Mari Kiyokawa, and Takashi Ooi
J. Am. Chem. Soc. 2021, 143, 11218-11224
DOI: 10.1021/jacs.1c05380
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199.
Synthesis and enantioseparation of chiral Au13 nanoclusters protected by bis-N-heterocyclic carbene ligands
Hong Yi, Kimberly M. Osten, Tetyana I. Levchenko, Alex J. Veinot, Yoshitaka Aramaki, Takashi Ooi, Masakazu Nambo, and Cathleen M. Crudden
Chem. Sci. 2021, 12, 10436-10440
DOI: 10.1039/D1SC03076K
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198.
Exploiting Transient Radical Cations as Brønsted Acids for Allylic C-H Heteroarylation of Enol Silyl Ethers
Tsubasa Nakashima, Haruka Fujimori, Kohsuke Ohmatsu, and Takashi Ooi
Chem. Eur. J. 2021, 27, 9253-9256
DOI: 10.1002/chem.202101352
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197.
Catalytic Asymmetric Synthesis of 5-Membered Alicyclic α-Quaternary β-Amino Acids via [3+2]-Photocycloaddition of α-Substituted Acrylates
Yuto Kimura, Daisuke Uraguchi and Takashi Ooi
Org. Biomol. Chem. 2021, 19, 1744-1747
DOI: 10.1039/D1OB00126D
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196.
o-Quinone Methide with Overcrowded Olefin Component as a Dehydridation Catalyst under Aerobic Photoirradiation Conditions
Daisuke Uraguchi, Kohsuke Kato, and Takashi Ooi
Chem. Sci. 2021, 12, 2778-2783
DOI: 10.1039/D0SC06240E
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195.
Urea as a Redox-active Directing Group under Asymmetric Photocatalysis of Iridium-Chiral Borate Ion Pairs
Daisuke Uraguchi, Yuto Kimura, Fumito Ueoka, and Takashi Ooi
J. Am. Chem. Soc. 2020, 142, 19462-19467
DOI: 10.1021/jacs.0c09468
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194.
Hybrid Catalysis of 8-Quinolinecarboxaldehyde and Br?nsted Acid for Efficient Racemization of α-Amino Amides and Its Application in Chemoenzymatic Dynamic Kinetic Resolution
Kohsuke Ohmatsu, Mari Kiyokawa, Yuto Shirai, Yuya Nagato, and Takashi Ooi
HETEROCYCLES 2021, 103, 218-224
DOI: 10.3987/COM-20-S(K)32
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193.
Mannich-type allylic C?H functionalization of enol silyl ethers under photoredox?thiol hybrid catalysis
Tsubasa Nakashima, Kohsuke Ohmatsu, Takashi Ooi
Org. Biomol. Chem. 2021, 19, 141-145
DOI: 10.1039/D0OB01862G
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192.
Ion-Paired Ligands for Palladium-Catalyzed Allylic Alkylation under Base-Free Conditions
Kohsuke Ohmatsu, Naho Matsuyama, Yuya Nagato, and Takashi Ooi
Chem. Lett. 2020, 49, 1114-1116
DOI: 10.1246/cl.200264
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191.
Redox-Regulated Divergence in Photocatalytic Addition of α-Nitro Alkyl Radicals to Styrenes
Yuto Tsuchiya, Ryota Onai, Daisuke Uraguchi and Takashi Ooi
Chem. Commun. 2020, 56, 11014-11017
DOI: 10.1039/D0CC04821F
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190.
A Structurally Robust Chiral Borate Ion: Molecular Design, Synthesis, and Asymmetric Catalysis
Daisuke Uraguchi, Fumito Ueoka, Naoya Tanaka, Tomohito Kizu, Wakana Takahashi, Takashi Ooi
Angew. Chem. Int. Ed. 2020, 59, 11456-11461
DOI: 10.1002/anie.202001637
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189.
Exploiting Single-Electron Transfer in Lewis Pairs for Catalytic Bond-Forming Reactions
Yoshitaka Aramaki, Naoki Imaizumi, Mao Hotta, Jun Kumagai, and Takashi Ooi
Chem. Sci. 2020, 11, 4305-4311
DOI: 10.1039/D0SC01159B
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188.
Non‐Enzymatic Hybrid Catalysis for Stereoconversion of l-Amino Acid Derivatives to d-Isomers
Yuya Nagato, Mari Kiyokawa, Yusuke Ueki, Jun Kikuchi, Kohsuke Ohmatsu, Masahiro Terada, Takashi Ooi
Asian J. Or. Chem. 2020, 9, 561-565
DOI: 10.1002/ajoc.202000067
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187.
Unveiling Latent Photoreactivity of Imines
Daisuke Uraguchi, Yuto Tsuchiya, Tsuyoshi Ohtani, Takafumi Enomoto, Shigeyuki Masaoka, Daisuke Yokogawa, and Takashi Ooi
Angew. Chem. Int. Ed. 2020, 59, 3665-3670
DOI: 10.1002/anie.201913555
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186.
Zwitterionic 1,2,3-Triazolium Amidate as a Catalyst for Photoinduced Hydrogen-Atom Transfer Radical Alkylation
Kohsuke Ohmatsu, Ryuhei Suzuki, Yukino Furukawa, Makoto Sato, and Takashi Ooi
ACS Catal. 2020, 10, 2627-2632
DOI: 10.1021/acscatal.9b04491
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185.
Inserting Nitrogen: An Effective Concept To Create Nonplanar and Stimuli-Responsive Perylene Bisimide Analogues
Sakiho Hayakawa, Ayumi Kawasaki, Yongseok Hong, Daisuke Uraguchi, Takashi Ooi, Dongho Kim, Tomoyuki Akutagawa, Norihito Fukui, and Hiroshi Shinokubo
J. Am. Chem. Soc. 2019, 141, 19807-19816
DOI: 10.1021/jacs.9b09556
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184.
Formal Hydroformylation of α,β-Unsaturated Carboxylic Acids under Photoexcited Ketone Catalysis
Kailong Zhu, Tsuyoshi Ohtani, Chandra Bhushan Tripathi, Daisuke Uraguchi, and Takashi Ooi
Chem. Lett. 2019, 48, 715-717
DOI: 10.1246/cl.190197
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183.
Photocatalytic Borylcyclopropanation of α-Boryl Styrenes
Tsuyoshi Ohtani, Yuto Tsuchiya, Daisuke Uraguchi and Takashi Ooi
Org. Chem. Front. 2019, 6, 1734-1737
DOI: 10.1039/c9qo00197b
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182.
A femto-molar range suicide germination stimulant for the parasitic plant Striga hermonthica
Daisuke Uraguchi, Keiko Kuwata, Yuh Hijikata, Rie Yamaguchi, Hanae Imaizumi, Sathiyanarayanan AM, Christin Rakers, Narumi Mori, Kohki Akiyama, Stephan Irle, Peter McCourt, Toshinori Kinoshita, Takashi Ooi, and Yuichiro Tsuchiya
Science 2018, 362, 1301-1305
DOI: 10.1126/science.aau5445
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181.
Catalyst-Directed Guidance of Sulfur-Substituted Enediolates to Stereoselective Carbon-Carbon Bond Formation with Aldehydes
Daisuke Uraguchi, Kohei Yamada, Makoto Sato, and Takashi Ooi
J. Am. Chem. Soc. 2018, 140, 5110-5117
DOI: 10.1021/jacs.7b12949
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180.
Catalyst-Enabled Site-divergent Stereoselective Michael Reactions: Overriding Intrinsic Reactivity of Enynyl Carbonyl Acceptors
Daisuke Uraguchi, Ryo Shibazaki, Naoya Tanaka, Kohei Yamada, Ken Yoshioka, and Takashi Ooi
Angew. Chem. Int. Ed. 2018, 57, 4732-4736
DOI: 10.1002/anie.201800057
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179.
Allenedicarboxylate as a Stereochemically Labile Electrophile for Chiral Organic Base-Catalyzed Stereoselective Michael Addition
Daisuke Uraguchi, Yasutaka Kawai, Hitoshi Sasaki, Kohei Yamada, and Takashi Ooi
Chem. Lett. 2018, 47, 594-597
DOI: 10.1246/cl.180031
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178.
Molecular Design, Synthesis, and Asymmetric Catalysis of a Hexacoordinated Chiral Phosphate Ion
Daisuke Uraguchi, Hitoshi Sasaki, Yuto Kimura, Takaki Ito, and Takashi Ooi
J. Am. Chem. Soc. 2018, 140, 2765-2768
DOI: 10.1021/jacs.7b13433
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177.
Diastereo- and enantioselective phase-transfer alkylation of 3-substituted oxindoles with racemic secondary alkyl halides
Kohsuke Ohmatsu, Yukino Furukawa, Mari Kiyokawa and Takashi Ooi
Chem. Commun. 2017, 53, 13113-13116
DOI: 10.1039/C7CC07122A
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176.
Photoredox Ketone Catalysis for Direct C-H Imidation and Acyloxylation of Arenes
Chandra Bhushan Tripathi, Tsuyoshi Ohtani, Michael T. Corbett and Takashi Ooi
Chem. Sci. 2017, 8, 5622-5627
DOI: 10.1039/C7SC01700F
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175.
Determination of the absolute configuration of compounds bearing chiral quaternary carbon centers using the crystalline sponge method
Shiho Sairenji, Takashi Kikuchi, Mohamed Ahmed Abozeid, Shinobu Takizawa, Hiroaki Sasai, Yuichiro Ando, Kohsuke Ohmatsu, Takashi Ooi and Makoto Fujita
Chem. Sci. 2017, 8, 5132-5136
DOI: 10.1039/c7sc01524k
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174.
N-Sulfonyl α-Imino Ester-Derived Chiral Oxaziridines: Catalytic Asymmetric Synthesis and Application as a Modular Chiral Organic Oxidant
Naoya Tanaka, Ryosuke Tsutsumi, Daisuke Uraguchi,Takashi Ooi
Chem. Commun. 2017, 53, 6999-7002
DOI: 10.1039/C7CC02502E
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173.
Unique Site-selectivity Control in Asymmetric Michael Addition of Azlactone to Alkenyl Dienyl Ketones Enabled by P-Spiro Chiral Iminophosphorane Catalysis
Ken Yoshioka, Kohei Yamada, Daisuke Uraguchi,Takashi Ooi
Chem. Commun. 2017, 53, 5495-5498
DOI: 10.1039/C7CC01715D
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172.
Acridinium Betaine as a Single-Electron-Transfer Catalyst: Design and Application to Dimerization of Oxindoles
Daisuke Uraguchi, Masahiro Torii, Takashi Ooi
ACS Catal. 2017, 7, 2765-2769
DOI: 10.1021/acscatal.7b00265
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171.
Complete diastereodivergence in asymmetric 1,6-addition reactions enabled by minimal modification of a chiral catalyst
Daisuke Uraguchi, Ken Yoshioka, Takashi Ooi
Nature Communications 2017, 8, 14793
DOI: 10.1038/ncomms14793
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170.
[5.5]-P-Spirocyclic Chiral Triaminoiminophosphorane-Catalyzed Asymmetric Hydrophosphonylation of Aldehydes and Ynones
Daisuke Uraguchi, Takaki Ito, Yuto Kimura, Yumiko Nobori, Makoto Sato, Takashi Ooi
Bull. Chem. Soc. Jpn. 2017, 90, 546-555
DOI: 10.1246/bcsj.20170040
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169.
In Situ Electrophilic Activation of Hydrogen Peroxide for Catalytic Asymmetric α-Hydroxylation of 3-Substituted Oxindoles
Kohsuke Ohmatsu, Yuichiro Ando, Takashi Ooi
Synlett 2017, xx, xxx-xxx
DOI: 10.1055/s-0036-1558958
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168.
Stereoselective Aza-Henry Reaction of 3-Nitro-Dihydro-2(1H)-Quinolones with N-BOC-Aldimines under the Catalysis of Chiral Ammonium Betaines
Daisuke Uraguchi, Masahiro Torii, Kohsuke Kato, Takashi Ooi
Heterocycles 2017, 94, 441-447
DOI: 10.3987/COM-16-13642
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167.
A Modular Strategy for the Direct Catalytic Asymmetric α-Amination of Carbonyl Compounds
Kohsuke Ohmatsu, Yuichiro Ando, Tsubasa Nakashima, Takashi Ooi
Chem 2016, 1, 802-810
DOI: 10.1016/j.chempr.2016.10.012
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166.
Origin of High Regio-, Diastereo-, and Enantioselectivities in 1,6-Addition of Azlactones to Dienyl N-Acylpyrroles: A Computational Study
Yamanaka, Masahiro; Sakata, Ken; Yoshioka, Ken; Uraguchi, Daisuke; Ooi, Takashi
J. Org. Chem. 2017, 82, 541-548
DOI: 10.1021/acs.joc.6b02572
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165.
Chiral Ammonium Betaine-Catalyzed Asymmetric Mannich-Type Reaction of Oxindoles
Masahiro Torii, Kohsuke Kato, Daisuke Uraguchi, and Takashi Ooi
Beilstein J. Org. Chem. 2016, 12, 2099-2103
DOI: 10.3762/bjoc.12.199
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164.
Independence from the Sequence of Single-Electron Transfer of Photoredox Process in Redox-Neutral Asymmetric Bond-Forming Reaction
Tomohito Kizu, Daisuke Uraguchi, and Takashi Ooi
J. Org. Chem. 2016, 81, 6953-6958
DOI: 10.1021/acs.joc.6b00445
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163.
Multiple Absolute Stereocontrol in Pd-Catalyzed [3+2] Cycloaddition of Oxazolidinones and Trisubstituted Alkenes Using Chiral Ammonium-Phosphine Hybrid Ligands
Naomichi Imagawa, Yuya Nagato, Kohsuke Ohmatsu, and Takashi Ooi
Bull. Chem. Soc. Jpn. 2016, 89, 649-656
DOI: 10.1246/bcsj.20160053
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162.
Anion-Stoichiometry-Dependent Selectivity Enhancement in Ion-Paired Chiral Ligand-Palladium Complex Catalyzed Enantioselective Allylic Alkylation
Kohsuke Ohmatsu, Yoshiyuki Hara, Yuya Kusano, Takashi Ooi
Synlett 2016, 27, 1047-1050
DOI: 10.1055/s-0035-1561403
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161.
Palladium-Catalyzed Branch-Selective Decarboxylative Allylation Using Ion-Paired Ligands
Yoshiyuki Hara, Yuya Kusano, Kohsuke Ohmatsu, and Takashi Ooi
Chem. Lett. 2016, 45, 552-554
DOI: 10.1246/cl.160158
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160.
Synergistic Catalysis of Ionic Brønsted Acid and Photosensitizer for a Redox Neutral Asymmetric α-Coupling of N-Arylaminomethanes with Aldimines
Daisuke Uraguchi, Natsuko Kinoshita, Tomohito Kizu, and Takashi Ooi
J. Am. Chem. Soc. 2015, 137, 13768-13771
DOI: 10.1021/jacs.5b09329
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159.
Enantioselective Reductive Multicomponent Coupling Reactions between Isatins and Aldehydes
Matthew A. Horwitz, Naoya Tanaka, Takuya Yokosaka, Daisuke Uraguchi, Jeffrey S. Johnson, and Takashi Ooi
Chem. Sci. 2015, 6, 6086-6090
DOI: 10.1039/C5SC02170G
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158.
Catalytic Asymmetric Cyanation of Alkylideneindolenines Generated from Sulfonylalkylindoles
Kohsuke Ohmatsu, Yukino Furukawa, Daigo Nakaguro, and Takashi Ooi
Chem. Lett. 2015, 44, 1350-1352
DOI: 10.1246/cl.150581
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157.
Highly E- and Enantioselective Michael Addition to Electron-deficient Internal Alkynes under the Catalysis of Chiral Iminophosphorane
Daisuke Uraguchi, Kohei Yamada, Takashi Ooi
Angew. Chem. Int. Ed. 2015, 54, 9954-9957
DOI: 10.1002/anie.201503928
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156.
Vinylogy in Nitronates: Utilization of α-Aryl Conjugated Nitroolefins as a Nucleophile for Highly Stereoselective Aza-Henry Reaction
Keigo Oyaizu, Daisuke Uraguchi, Takashi Ooi
Chem. Commun. 2015, 51, 4437-4439
DOI: 10.1039/C4CC10261D
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155.
Palladium-Catalyzed Asymmetric [3 + 2] Cycloaddition of 5-Vinyloxazolidinones with Imines Using Chiral Ammonium-Phosphine Hybrid Ligand
Kohsuke Ohmatsu, Shinya Kawai, Naomichi Imagawa, Takashi Ooi
ACS Catal. 2014, 4, 4304-4306
DOI: 10.1021/cs501369z
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154.
Chiral Ammonium Betaine-Catalyzed Highly Stereoselective Aza-Henry Reaction of α-Aryl Nitromethanes with Aromatic N-Boc Imines
Daisuke Uraguchi, Keigo Oyaizu, Haruhiro Noguchi, Takashi Ooi
Chem. Asian J. 2014, 10, 334-337
DOI: 10.1002/asia.201402943
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153.
Enantioselective Protonation of α-Hetero Carboxylic Acid-Derived Ketene Disilyl Acetals under Chiral Ionic Brønsted Acid Catalysis
Daisuke Uraguchi, Tomohito Kizu, Yuki Ohira, Takashi Ooi
Chem. Commun. 2014, 50,13489-13491
DOI: 10.1039/C4CC06081D
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152.
In-Situ Generation of Ion-Paired Chiral Ligands: Rapid Identification of Optimal Ligand for Palladium-Catalyzed Asymmetric Allylation
Kohsuke Ohmatsu, Yoshiyuki Hara, Takashi Ooi
Chem. Sci. 2014, 5, 3645-3650
DOI: 10.1039/C4SC01032A
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151.
Enantioselective formal α-allylation of nitroalkanes through a chiral iminophosphorane-catalyzed Michael reaction-Julia-Kocienski olefination sequence
Daisuke Uraguchi, Shinji Nakamura, Hitoshi Sasaki, Yuki Konakade, Takashi Ooi
Chem. Commun. 2014, 50, 3491-3493
DOI: 10.1039/C3CC49477B
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150.
Practical Preparation of Chiral N-Sulfonyl Oxaziridines by Catalytic Asymmetric Payne Oxidation
Ryosuke Tsutsumi, Seonwoo Kim, Daisuke Uraguchi, Takashi Ooi
Synthesis (PSP article) 2014, 46, 871-878
DOI: 10.1055/s-0033-1340818
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149.
Ligand-controlled E/Z selectivity and enantioselectivity in palladium-catalyzed allylation of benzofuranones with 1,2-disubstituted allylic carbonates
Kohsuke Ohmatsu, Mitsunori Ito , Takashi Ooi
Chem. Commun. 2014, 50, 4554-4557
DOI: 10.1039/C3CC49338E
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148.
Asymmetric Alkylation of α-Cyanosulfones Catalyzed by Chiral 1,2,3-Triazolium Salts
Kohsuke Ohmatsu, Yusuke Hakamata, Ayano Goto, Takashi Ooi
Heterocycles 2014, 88, 1661-1666
DOI: 10.3987/COM-13-S(S)121
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147.
Catalytic asymmetric Payne oxidation under the catalysis of P-spiro chiral triaminoiminophosphorane: Application to the synthesis of N-sulfonyl oxaziridines
Daisuke Uraguchi, Ryosuke Tsutsumi, Takashi Ooi
Tetrahedron 2014, 70, 1691-1701
DOI: 10.1016/j.tet.2013.12.086
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146.
Asymmetric Substitution at the Tetrasubstituted Chiral Carbon: Catalytic Ring-Opening Alkylation of Racemic 2,2-Disubstituted Aziridines with 3-Substituted Oxindoles
Kohsuke Ohmatsu, Yuichiro Ando , Takashi Ooi
J. Am. Chem. Soc. 2013, 135, 18706-18709
DOI: 10.1021/ja411647x
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145.
Ligand-enabled multiple absolute stereocontrol in metal-catalysed cycloaddition for construction of contiguous all-carbon quaternary stereocenters
Kohsuke Ohmatsu, Naomichi Imagawa, Takashi Ooi
Nature Chem. 2014, 6, 47-51
DOI: 10.1038/nchem.1796
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144.
Production at the Curie Level of No-Carrier-Added 6-18F-Fluoro-L-Dopa
Lionel C. Libert, Xavier Franci, Alain R. Plenevaux, Takashi Ooi, Keiji Maruoka, Andró J. Luxen, Christian F. Lemaire
J. Nucl. Med. 2013, 54, 1154-1161
DOI: 10.2967/jnumed.112.112284
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143.
Carbene Transfer from Triazolylidene Gold Complexes as a Potent Strategy for Inducing High Catalytic Activity
Daniel Canseco-Gonzalez, Ana Petronilho, Helge Mueller-Bunz, Kohsuke Ohmatsu, Takashi Ooi, Martin Albrecht
J. Am. Chem. Soc. 2013, 135, 13193-13203
DOI: 10.1021/ja406999p
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142.
Catalytic Asymmetric Oxidation of N-Sulfonyl Imines with Hydrogen Peroxide−Trichloroacetonitrile System
Daisuke Uraguchi, Ryosuke Tsutsumi, and Takashi Ooi
J. Am. Chem. Soc. 2013, 135, 8161-8164
DOI: 10.1021/ja403491j
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141.
Exploiting the Modularity of Ion-Paired Chiral Ligands for Palladium-Catalyzed Enantioselective Allylation of Benzofuran-2(3H)-ones
Kohsuke Ohmatsu, Mitsunori Ito, Tomoatsu Kunieda, and Takashi Ooi
J. Am. Chem. Soc. 2013, 135, 590−593
DOI: 10.1021/ja312125a
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140.
Highly Stereoselective Michael Addition of Azlactones to Electron-Deficient Triple Bonds under P-Spiro Chiral Iminophosphorane Catalysis: Importance of Protonation Pathway
Uraguchi, Daisuke; Ueki, Yusuke; Sugiyama, Atsushi; Ooi, Takashi
Chem. Sci. 2013, 4, 1308-1311
DOI: 10.1039/C2SC22027J
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139.
Highly Regio-, Diastereo-, and Enantioselective 1,6- and 1,8-Additions of Azlactones to Di- and Trienyl N-Acylpyrroles
Uraguchi, Daisuke; Yoshioka, Ken; Ueki, Yusuke; Ooi, Takashi
J. Am. Chem. Soc. 2012, 134, 19370-19373.
DOI: 10.1039/C2SC22027J
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138.
Chiral Ionic Brønsted Acid-Achiral Brønsted Base Synergistic Catalysis for Asymmetric Sulfa-Michael Addition to Nitroolefins
Uraguchi, Daisuke; Kinoshita, Natsuko; Nakashima, Daisuke; Ooi, Takashi
Chem. Sci. 2012, 3, 3161-3164.
DOI: 10.1039/C2SC20698F
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137.
Catalytic Asymmetric Ring Openings of Meso and Terminal Aziridines with Halides Mediated by Chiral 1,2,3-Triazolium Silicates
Ohmatsu, Kohsuke; Hamajima, Yuta; Ooi, Takashi
J. Am. Chem. Soc. 2012, 134, 8794-8797.
DOI: 10.1021/ja3028668
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136.
Catalytic Asymmetric Mannich-Type Reactions of α-Cyano α-Sulfonyl Carbanions
Ohmatsu, Kohsuke; Goto, Ayano; Ooi, Takashi
Chem. Commun. 2012, 48, 7913-7915.
DOI: 10.1039/C2CC32398B
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135.
Nitroolefins as a Nucleophilic Component for Highly Stereoselective Aza-Henry Reaction under the Catalysis of Chiral Ammonium Betaines
Uraguchi, Daisuke; Oyaizu, Keigo; Ooi, Takashi
Chem. Eur. J. 2012, 18, 8306-8309.
DOI: 10.1002/chem.201201259
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134.
Ionic Nucleophilic Catalysis of Chiral Ammonium Betaines for Highly Stereoselective Aldol Reaction from Oxindole-Derived Vinylic Carbonates
Uraguchi, Daisuke; Koshimoto, Kyohei; Ooi, Takashi
J. Am. Chem. Soc. 2012, 134, 6972-6975.
DOI: 10.1021/ja3022939
-
133.
Ion-paired chiral ligands for asymmetric palladium catalysis
Ohmatsu, Kohsuke; Ito, Mitsunori; Kunieda, Tomoatsu; Ooi, Takashi
Nat. Chem. 2012, 4, 473-477.
DOI:10.1038/nchem.1311
-
132.
Base-Catalyzed Direct Aldolization of α-Alkyl-α-Hydroxy Trialkyl Phosphonoacetates
Corbett, Michael; Uraguchi, Daisuke; Ooi, Takashi; Johnson, Jeffrey
Angew. Chem. Int. Ed. 2012, 51, 4685-4689.
DOI: 10.1002/anie.201200559
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131.
Highly Stereoselective Catalytic Conjugate Addition of Acyl Anion Equivalent to Nitroolefins
Uraguchi, Daisuke; Ueki, Yusuke; Ooi, Takashi
Chem. Sci. 2012, 3, 842-845.
DOI: 10.1039/C1SC00678A
-
130.
Enantioselective Aza-Michael Addition to Conjugated Nitroenynes Catalyzed by Chiral Arylaminophosphonium Barfates
Uraguchi, Daisuke; Kinoshita, Natsuko; Kizu, Tomohito; Ooi, Takashi
Synlett. 2011, 1265-1267.
DOI: 10.1055/s-0030-1260541
-
129.
Precise Control of Spontaneous Molecular Assembly of Chiral Tetraaminophosphonium Aryloxide−Arylhydroxide(s) in Solution
Uraguchi, Daisuke; Ueki, Yusuke; Ooi, Takashi
Angew. Chem. Int. Ed. 2011, 50, 3681-3683.
DOI: 10.1002/anie.201007752
-
128.
Chiral 1,2,3-Triazoliums as New Cationic Organic Catalysts with Anion-Recognition Ability: Application to Asymmetric Alkylation of Oxindoles
Ohmatsu, Kohsuke, Kiyokawa, Mari, Ooi, Takashi
J. Am. Chem. Soc. 2011, 133, 1307-1309.
DOI: 10.1021/ja1102844
-
127.
Catalytic Asymmetric Protonation of α-Amino Acid-Derived Ketene Disilyl Acetals Using P-Spiro Diaminodioxaphosphonium Barfates as Chiral Proton
Uraguchi, Daisuke; Kinoshita, Natsuko; Ooi, Takashi
J. Am. Chem. Soc. 2010, 132, 12240-12242.
DOI: 10.1021/ja105945z
-
126.
Catalytic Asymmetric Direct Henry Reaction of Ynals: Short Syntheses of (2S,3R)-(+)-Xestoaminol C and (−)-Codonopsinines
Uraguchi, Daisuke; Nakamura, Shinji; Ooi, Takashi
Angew. Chem. Int. Ed. 2010, 49, 7562-7565.
DOI: 10.1002/anie.201004072
-
125.
Chiral Ammonium Betaines as an Ionic Nucleophilic Catalyst
Uraguchi, Daisuke; Koshimoto, Kyohei; Miyake, Shuhei; Ooi, Takashi
Angew. Chem. Int. Ed. 2010, 49, 5567-5569.
DOI: 10.1002/anie.201002315
-
124.
Catalytic Asymmetric Hydrophosphonylation of Ynones
Uraguchi, Daisuke; Ito, Takaki; Nakamura, Shinji; Ooi, Takashi
Chem. Sci. 2010, 1, 488-490.
DOI: 10.1039/c0sc00268b
-
123.
Performance of C1-symmetric chiral ammonium betaines as a catalyst for the enantioselective Mannich-type reaction of α-nitrocarboxylates
Uraguchi, Daisuke; Koshimoto, Kyohei; Sanada, Chisato; Ooi, Takashi
Tetrahedron: Asymmetry. 2010, 21, 1189-1190.
http://dx.doi.org/10.1016/j.tetasy.2010.04.006
-
122.
Flexible Synthesis, Structural Determination, and Synthetic Application of a New C1-Symmetric Chiral Ammonium Betaine
Uraguchi, Daisuke; Koshimoto, Kyohei; Ooi, Takashi
Chem. Commun. 2010, 46, 300-302.
http://www.rsc.org/Publishing/Journals/CC/article.asp?doi=b916627k
-
121.
Phase-Transfer-Catalyzed Asymmetric Alkylation of α-Benzoyloxy-β-keto Esters: Stereoselective Construction of Congested 2,3-Dihydroxycarboxylic Acid Esters
Hashimoto, Takuya; Sasaki, Keigo; Fukumoto, Kazuhiro; Murase, Yuichi; Abe, Naoyuki; Ooi, Takashi; Maruoka, Keiji
Chem. Asian J. 2010, 5, in press.
http://www3.interscience.wiley.com/journal/123207901/abstract
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120.
Diastereo- and Enantioselective Direct Henry Reaction of Pyruvates Mediated by Chiral P-Spiro Tetraaminophosphonium salts
Uraguchi, Daisuke; Ito, Takaki; Nakamura, Shinji; Sakaki, Sawako; Ooi, Takashi
Chem. Lett. 2009, 38, 1052.
http://www.jstage.jst.go.jp/article/cl/38/11/38_1052/_article
-
119.
Chiral Organic Ion Pair Catalysts Assembled Through a Hydrogen-Bonding Network
Uraguchi, Daisuke; Ueki, Yusuke; Ooi, Takashi
Science. 2009, 326, 120-123.
http://www.sciencemag.org/cgi/content/abstract/326/5949/120
-
118.
Al Lewis acid-catalyzed regiodivergent 1,2-rearrangement of α-siloxy aldehydes: scope and mechanism
Kohsuke Ohmatsu, Takayuki Tanaka, Takashi Ooi, Keiji Maruoka
Tetrahedron. 2009, 65, 7516-7522.
http://dx.doi.org/10.1016/j.tet.2009.06.126
-
117.
Chiral Arylaminophosphonium Barfates as a New Class of Charged Br?nsted Acid for the Enantioselective Activation of Nonionic Lewis Bases
Uraguchi, Daisuke; Nakashima, Daisuke; Ooi, Takashi
J. Am. Chem. Soc. 2009, 131, 7242-7243.
http://pubs.acs.org/doi/abs/10.1021/ja903271t
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116.
Generation of Chiral Phosphonium Dialkyl Phosphite as a Highly Reactive P-Nucleophile: Application to Asymmetric Hydrophosphonylation of Aldehydes
Uraguchi, Daisuke; Ito, Takaki; Ooi, Takashi
J. Am. Chem. Soc. 2009, 131, 3836-3837.
http://pubs.acs.org/doi/abs/10.1021/ja810043d
-
115.
Phase-transfer-catalyzed Enantioselective Alkylation of α-Benzoyloxy-β-keto ester
Hashimoto, Takuya; Sasaki, Keigo; Fukumoto, Kazuhiro; Murase, Yuichi; Ooi, Takashi; Maruoka, Keiji
Synlett. 2009, 661-663.
http://www.thieme-connect.de/DOI/DOI?10.1055/s-0028-1087814
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114.
Asymmetric Synthesis of α,α-Disubstituted-α-Amino Acids via Enantioselective Alkylation of Azlactones under Biphasic Conditions Using P-Spiro Chiral Tetraaminophosphonium Salts as a Phase-Transfer Catalyst
Uraguchi, Daisuke; Asai, Yoshihiro; Seto, Yuki; Ooi, Takashi
Synlett. 2009, 658-660.
http://www.thieme-connect.com/ejournals/abstract/synlett/doi/10.1055/s-0028-1087812
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113.
Site-directed Asymmetric Quaternization of a Peptide Backbone at a C-Terminal Azlactone
Uraguchi, Daisuke; Asai, Yoshihiro; Ooi, Takashi
Angew. Chem. Int. Ed. 2009, 48, 733-737.
http://dx.doi.org/10.1002/anie.200803661
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112.
Chiral Tetraaminophosphonium Carboxylate-Catalyzed Direct Mannich-Type Reaction
Uraguchi, Daisuke; Ueki, Yusuke; Ooi, Takashi
J. Am. Chem. Soc. 2008, 130, 14088-14089.
http://pubs.acs.org/cgi-bin/abstract.cgi/jacsat/asap/abs/ja806311e.html
-
111.
Chiral Ammonium Betaines: A Bifunctional Organic Base Catalyst for Asymmetric Mannich-type Reaction of α-Nitrocarboxylates
Uraguchi, Daisuke; Koshimoto, Kyohei; Ooi, Takashi
J. Am. Chem. Soc. 2008, 130, 10878-10879.
http://pubs.acs.org/cgi-bin/abstract.cgi/jacsat/asap/abs/ja8041004.html
-
110.
Synthesis of Chiral Tetraaminophosphonium Chlorides from N-BOC α-Amino Acid Esters
Uraguchi, Daisuke; Sakaki, Sawako; Ueki, Yusuke; Ito, Takaki; Ooi, Takashi
Heterocycles. 2008, 76, 1081-1085.
http://www.heterocycles.jp/library/abstract.php?article=3158
-
109.
Complete Switch of Migratory Aptitude in Aluminum-Catalyzed 1,2-Rearrangement of Differently a,a-Disubstituted a-Siloxy Aldehydes
Ohmatsu, Kohsuke; Tanaka, Takayuki; Ooi, Takashi; Maruoka, Keiji
Angew. Chem. Int. Ed. 2008, 47, 5203-5206.
http://dx.doi.org/10.1002/anie.200800801
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108.
Chiral Tetraaminophosphonium Salt-Mediated Asymmetric Direct Henry Reaction
Uraguchi, Daisuke; Sakaki, Sawako; Ooi, Takashi
J. Am. Chem. Soc. 2007, 129, 12392-12393.
http://pubs.acs.org/cgi-bin/abstract.cgi/jacsat/2007/129/i41/abs/ja075152+.html
-
107.
Practical Stereoselective Synthesis of β-Branched α-Amino Acids through Efficient Kinetic Resolution in the Phase-Transfer-Catalyzed Asymmetric Alkylations
Ooi, Takashi; Kato, Daisuke; Inamura, Koji; Ohmatsu, Kohsuke; Maruoka, Keiji
Org. Lett. 2007, 9, 3945-3948.
http://dx.doi.org/10.1021/ol701558e
-
106.
Catalytic Asymmetric Rearrangement of α,α-Disubstituted α-Siloxy Aldehydes to Optically Active Acyloins Using Axially Chiral Organoaluminum Lewis Acids
Ooi, Takashi; Ohmatsu, Kohsuke; Maruoka, Keiji
J. Am. Chem. Soc. 2007, 129, 2410-2411.
http://dx.doi.org/10.1021/ja063051q
-
105.
Advantage of in situ generation of N-arylsulfonyl imines from α-amide sulfones in the phase-transfer-catalyzed asymmetric Strecker reaction
Ooi, Takashi; Uematsu, Yukitaka; Fujimoto, Jun; Fukumoto, Kazuhiro; Maruoka, Keiji
Tetrahedron Lett. 2007, 48, 1337-1340.
http://dx.doi.org/10.1016/j.tetlet.2006.12.122
-
104.
Highly diastereo- and enantioselective formal conjugate addition of nitroalkanes to nitroalkenes by chiral ammonium bifluoride catalysis
Ooi, Takashi; Takada, Saki; Doda, Kanae; Maruoka, Keiji
Angew. Chem., Int. Ed. 2006, 45, 7606-7608.
http://dx.doi.org/10.1002/anie.200602787
-
103.
Asymmetric phase-transfer catalysis of homo- and heterochiral quaternary ammonium salts: development and application of conformationally flexible chiral phase-transfer catalysts
Ooi, Takashi; Uematsu, Yukitaka; Kameda, Minoru; Maruoka, Keiji
Tetrahedron. 2006, 62, 11425-11436.
http://dx.doi.org/10.1016/j.tet.2006.08.052
-
102.
Asymmetric synthesis of α-acyl-γ-butyrolactones possessing all-carbon quaternary stereocenters by phase-transfer-catalyzed alkylation.
Ooi, Takashi; Miki, Takashi; Fukumoto, Kazuhiro; Maruoka, Keiji
Adv. Synth. Catal. 2006, 348, 1539-1542.
http://dx.doi.org/10.1002/adsc.200606064
-
101.
Construction of Enantiomerically Enriched Tertiary α-Hydroxycarboxylic Acid Derivatives by Phase-Transfer-Catalyzed Asymmetric Alkylation of Diaryloxazolidin-2,4-diones
Ooi, Takashi; Fukumoto, Kazuhiro; Maruoka, Keiji
Angew. Chem., Int. Ed. 2006, 45, 3839-3842.
http://dx.doi.org/10.1002/anie.200600470
-
100.
Highly enantioselective monoalkylation of p-chlorobenzaldehyde imine of glycine tert-butyl ester under mild phase-transfer conditions
Ooi, Takashi; Arimura, Yuichiro; Hiraiwa, Yukihiro; Yuan, Lin Ming; Kano, Taichi; Inoue, Toru; Matsumoto, Jun; Maruoka, Keiji
Tetrahedron: Asym. 2006, 17, 603-606.
http://dx.doi.org/10.1016/j.tetasy.2006.01.019
-
99.
Asymmetric Strecker Reaction of Aldimines Using Aqueous Potassium Cyanide by Phase-Transfer Catalysis of Chiral Quaternary Ammonium Salts with a Tetranaphthyl Backbone
Ooi, Takashi; Uematsu, Yukitaka; Maruoka, Keiji
J. Am. Chem. Soc. 2006, 128, 2548-2549.
http://dx.doi.org/10.1021/ja058066n
-
98.
Asymmetric Strecker Reaction of Aldimines Using Aqueous Potassium Cyanide by Phase-Transfer Catalysis of Chiral Quaternary Ammonium Salts with a Tetranaphthyl Backbone
Ooi, Takashi; Uematsu, Yukitaka; Maruoka, Keiji
J. Am. Chem. Soc. 2006, 128, 2548-2549.
http://dx.doi.org/10.1021/ja058066n
-
97.
N-Spiro Chiral Quaternary Ammonium Bromide Catalyzed Diastereo- and Enantioselective Conjugate Addition of Nitroalkanes to Cyclic α,β-Unsaturated Ketones under Phase-Transfer Conditions
Ooi, Takashi; Takada, Saki; Fujioka, Shingo; Maruoka, Keiji
Org. Lett. 2005, 7, 5143-5146.
http://dx.doi.org/10.1021/ol0517170
-
96.
Importance of Chiral Phase-Transfer Catalysts with Dual Functions in Obtaining High Enantioselectivity in the Michael Reaction of Malonates and Chalcone Derivatives
Ooi, Takashi; Ohara, Daisuke; Fukumoto, Kazuhiro; Maruoka, Keiji
Org. Lett. 2005, 7, 3195-3197.
http://dx.doi.org/10.1021/ol050902a
-
95.
Highly Enantioselective Phase-Transfer-Catalyzed Alkylation of Protected α-Amino Acid Amides toward Practical Asymmetric Synthesis of Vicinal Diamines, α-Amino Ketones, and α-Amino Alcohols
Ooi, Takashi; Takeuchi, Mifune; Kato, Daisuke; Uematsu, Yukitaka; Tayama, Eiji; Sakai, Daiki; Maruoka, Keiji
J. Am. Chem. Soc. 2005, 127, 5073-5083.
http://dx.doi.org/10.1021/ja0459328
-
94.
Dramatic Rate Enhancement of Asymmetric Phase-Transfer-Catalyzed Alkylations
Shirakawa, Seiji; Yamamoto, Kenichiro; Kitamura, Masanori; Ooi, Takashi; Maruoka, Keiji
Angew. Chem., Int. Ed. 2005, 44, 625-628.
http://dx.doi.org/10.1002/anie.200462035
-
93.
Asymmetric Synthesis of Functionalized Aza-Cyclic Amino Acids with Quaternary Stereocenters by a Phase-Transfer-Catalyzed Alkylation Strategy
Ooi, Takashi; Miki, Takashi; Maruoka, Keiji
Org. Lett. 2005, 7, 191-193.
http://dx.doi.org/10.1021/ol047921p
-
92.
Organoaluminum-Mediated Selective 1,2-Rearrangement of γ,γ-Disubstituted γ-Amino α,β-Unsaturated Carbonyl Compounds Leading to Unsymmetrically Substituted Pyrroles
Ooi, Takashi; Ohmatsu, Kohsuke; Ishii, Hiroki; Saito, Akira; Maruoka, Keiji
Tetrahedron Lett. 2004, 45, 9315-9317.
http://dx.doi.org/10.1016/j.tetlet.2004.10.126
-
91.
Meerwein-Ponndorf-Verley Alkynylation of Aldehydes: Essential Modification of Aluminum Alkoxides for Rate Acceleration and Asymmetric Synthesis
Ooi, Takashi; Miura, Tomoya; Ohmatsu, Kohsuke; Saito, Akira; Maruoka, Keiji
Org. Biomol. Chem. 2004, 2, 3312-3319.
http://dx.doi.org/10.1039/B411090K
-
90.
Anti-selective Asymmetric Synthesis of β-Hydroxy-α-Amino Acid Esters by the in Situ Generated Chiral Quaternary Ammonium Fluoride-Catalyzed Mukaiyama-Type Aldol Reaction
Ooi, Takashi; Taniguchi, Mika; Doda, Kanae; Maruoka, Keiji
Adv. Synth. Catal. 2004, 346, 1073-1076.
http://dx.doi.org/10.1002/adsc.200404111
-
89.
Highly Enantioselective Conjugate Addition of Nitroalkanes to Alkylidenemalonates Using Efficient Phase-Transfer Catalysis of N-Spiro Chiral Ammonium Bromides
Ooi, Takashi; Fujioka, Shingo; Maruoka, Keiji
J. Am. Chem. Soc. 2004, 126, 11790-11791.
http://dx.doi.org/10.1021/ja047047v
-
88.
Evaluation of the Relationship Between the Catalyst Structure and Regio- as well as Stereoselectivity in the Chiral Ammonium Bifluoride-Catalyzed Asymmetric Addition of Silyl Nitronates to α,β-Unsaturated Aldehydes
Ooi, Takashi; Morimoto, Kumiko; Doda, Kanae; Maruoka, Keiji
Chem. Lett. 2004, 33, 824-825.
http://dx.doi.org/10.1246/cl.2004.824
-
87.
Development of Highly Diastereo- and Enantioselective Direct Asymmetric Aldol Reaction of a Glycinate Schiff Base with Aldehydes Catalyzed by Chiral Quaternary Ammonium Salts
Ooi, Takashi; Kameda, Minoru; Taniguchi, Mika; Maruoka, Keiji
J. Am. Chem. Soc. 2004, 126, 9685-9694.
http://dx.doi.org/10.1021/ja048865q
-
86.
Catalytic Asymmetric Synthesis of a Nitrogen Analogue of Dialkyl Tartrate by Direct Mannich Reaction under Phase-Transfer Conditions
Ooi, Takashi; Kameda, Minoru; Fujii, Junichi; Maruoka, Keiji
Org. Lett. 2004, 6, 2397-2399.
http://dx.doi.org/10.1021/ol049215u
-
85.
Efficient Asymmetric Catalysis of Chiral Organoaluminum Complex for Enantioselective Ene Reactions of Aldehydes
Ooi, Takashi; Ohmatsu, Kohsuke; Uraguchi, Daisuke; Maruoka, Keiji
Tetrahedron Lett. 2004, 45, 4481-4484.
http://dx.doi.org/10.1016/j.tetlet.2004.04.052
-
84.
Design of New Chiral Phase-Transfer Catalysts with Dual Functions for Highly Enantioselective Epoxidation of α,β-Unsaturated Ketones
Ooi, Takashi; Ohara, Daisuke; Tamura, Masazumi; Maruoka, Keiji
J. Am. Chem. Soc. 2004, 126, 6844-6845.
http://dx.doi.org/10.1021/ja048600b
-
83.
Stereoselective Terminal Functionalization of Small Peptides for Catalytic Asymmetric Synthesis of Unnatural Peptides
Maruoka, Keiji; Tayama, Eiji; Ooi, Takashi
Proc. Natl. Acad. Sci. USA 2004, 101, 5824-5829.
http://dx.doi.org/10.1073/pnas.0307725101
-
82.
Highly Enantioselective Alkylation of Glycine Methyl and Ethyl Ester Derivatives under Phase-Transfer Conditions: its Synthetic Advantage
Ooi, Takashi; Uematsu, Yukitaka; Maruoka, Keiji
Tetrahedron Lett. 2004, 45, 1675-1678.
http://dx.doi.org/10.1016/j.tetlet.2003.12.102
-
81.
Elucidation and Synthetic Utility of the Double Electrophilic Activation Phenomenon
Ooi, Takashi; Takahashi, Makoto; Yamada, Masao; Tayama, Eiji; Omoto, Kiyoyuki; Maruoka, Keiji
J. Am. Chem. Soc. 2004, 126, 1150-1160.
http://dx.doi.org/10.1021/ja030552s
-
80.
Practical Asymmetric Synthesis of Vicinal Diamines Through the Catalytic Highly Enantioselective Alkylation of Glycine Amide Derivatives
Ooi, Takashi; Sakai, Daiki; Takeuchi, Mifune; Tayama, Eiji; Maruoka, Keiji
Angew. Chem., Int. Ed. 2003, 42, 5868-5870.
http://dx.doi.org/10.1002/anie.200352658
-
79.
A New N-Spiro C2-Symmetric Chiral Quaternary Ammonium Bromide Consisting of 4,6-Disubstituted Biphenyl Subunit as an Efficient Chiral Phase-Transfer Catalyst
Ooi, Takashi; Kubota, Yasushi; Maruoka, Keiji
Synlett. 2003, 1931-1933.
http://dx.doi.org/10.1055/s-2003-41478
-
78.
Highly Enantioselective Construction of Quaternary Stereocenters on β-Keto Esters by Phase-Transfer Catalytic Asymmetric Alkylation and Michael Reaction
Ooi, Takashi; Miki, Takashi; Taniguchi, Mika; Shiraishi, Misato; Takeuchi, Mifune; Maruoka, Keiji
Angew. Chem., Int.l Ed. 2003, 42, 3796-3798.
http://dx.doi.org/10.1002/anie.200351469
http://dx.doi.org/10.1002/anie.200390567
-
77.
Fluorotetraphenylbismuth: A New Reagent for Efficient Regioselective α-Phenylation of Carbonyl Compounds
Ooi, Takashi; Goto, Ryoji; Maruoka, Keiji
J. Am. Chem. Soc. 2003, 125, 10494-10495.
http://dx.doi.org/10.1002/anie.200351469
http://dx.doi.org/10.1002/anie.200390567
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76.
A Scalable Synthesis of (R)-3,5-Dihydro-4H-dinaphth[2,1-c:1'2'-e]azepine
Ikunaka, Masaya; Maruoka, Keiji; Okuda, Yoshiaki; Ooi, Takashi
Org. Proc. Res. Dev. 2003, 7, 644-648.
http://dx.doi.org/10.1021/op034067t
-
75.
Highly Enantioselective Michael Addition of Silyl Nitronates to α,β-Unsaturated Aldehydes Catalyzed by Designer Chiral Ammonium Bifluorides: Efficient Access to Optically Active γ-Nitro Aldehydes and Their Enol Silyl Ethers
Ooi, Takashi; Doda, Kanae; Maruoka, Keiji
J. Am. Chem. Soc. 2003, 125, 9022-9023.
http://dx.doi.org/10.1021/ja0352810
-
74.
New, Improved Procedure for the Synthesis of Structurally Diverse N-Spiro C2-Symmetric Chiral Quaternary Ammonium Bromides
Ooi, Takashi; Uematsu, Yukitaka; Maruoka, Keiji
J. Org. Chem. 2003, 68, 4576-4578.
http://dx.doi.org/10.1021/jo030032f
-
73.
Design of N-Spiro C2-Symmetric Chiral Quaternary Ammonium Bromides as Novel Chiral Phase-Transfer Catalysts: Synthesis and Application to Practical Asymmetric Synthesis of α-Amino Acids
Ooi, Takashi; Kameda, Minoru; Maruoka, Keiji
J. Am. Chem. Soc. 2003, 125, 5139-5151.
http://dx.doi.org/10.1021/ja021244h
-
72.
Isopropoxyaluminum 1,1'-Biphenyl-2-oxy-2'-perfluorooctanesulfonamide as a Catalyst for Tishchenko Reaction
Ooi, Takashi; Ohmatsu, Kohsuke; Sasaki, Kouji; Miura, Tomoya; Maruoka, Keiji
Tetrahedron Lett. 2003, 44, 3191-3193.
http://dx.doi.org/10.1016/S0040-4039(03)00472-6
-
71.
Highly Stereoselective N-Terminal Functionalization of Small Peptides by Chiral Phase-Transfer Catalysis
Ooi, Takashi; Tayama, Eiji; Maruoka, Keiji
Angew. Chem., Int. Ed. 2003, 42, 579-582.
http://dx.doi.org/10.1002/anie.200390167
-
70.
Asymmetric Skeletal Rearrangement of Symmetrically α,α-Disubstituted α-Amino Aldehydes: A New Entry to Optically Active α-Hydroxy Ketones
Ooi, Takashi; Saito, Akira; Maruoka, Keiji
J. Am. Chem. Soc. 2003, 125, 3220-3221.
http://dx.doi.org/10.1021/ja0292851
-
69.
Designer Chiral Quaternary Ammonium Bifluorides as an Efficient Catalyst for Asymmetric Nitroaldol Reaction of Silyl Nitronates with Aromatic Aldehydes
Ooi, Takashi; Doda, Kanae; Maruoka, Keiji
J. Am. Chem. Soc. 2003, 125, 2054-2055.
http://dx.doi.org/10.1021/ja0292851
-
68.
Direct Asymmetric Aldol Reactions of Glycine Schiff Base with Aldehydes Catalyzed by Chiral Quaternary Ammonium Salts
Ooi, Takashi; Taniguchi, Mika; Kameda, Minoru; Maruoka, Keiji
Angew. Chem., Int. Ed. 2002, 41, 4542-4544.
Wiley InterScience :: Article :: HTML Full Text
-
67.
Activation of Ether Functionality of Allyl Vinyl Ethers by Chiral Bis(organoaluminum) Lewis Acids: Application to Asymmetric Claisen Rearrangement
Tayama, Eiji; Saito, Akira; Ooi, Takashi; Maruoka, Keiji
Tetrahedron. 2002, 58, 8307-8312.
http://dx.doi.org/10.1016/S0040-4020(02)00981-X
-
66.
Evaluation of The Efficiency of the Chiral Quaternary Ammonium Salt β-Np-NAS-Br in the Organic-Aqueous Phase-Transfer Alkylation of a Protected Glycine Derivative
Ooi, Takashi; Uematsu, Yukitaka; Maruoka, Keiji
Adv. Synth. Catal. 2002, 344, 288-291.
10.1002/1615-4169
-
65.
Practical Oppenauer (OPP) Oxidation of Alcohols with a Modified Aluminum Catalyst
Ooi, Takashi; Otsuka, Hidehito; Miura, Tomoya; Ichikawa, Hayato; Maruoka, Keiji
Org. Lett. 2002, 4, 2669-2672.
http://dx.doi.org/10.1021/ol020094c
-
64.
Asymmetric Induction in the Neber Rearrangement of Simple Ketoxime Sulfonates under Phase-Transfer Conditions: Experimental Evidence for the Participation of an Anionic Pathway
Ooi, Takashi; Takahashi, Makoto; Doda, Kanae; Maruoka, Keiji
J. Am. Chem. Soc. 2002, 124, 7640-7641.
http://dx.doi.org/10.1021/ja0118791
-
63.
Conformationally Flexible, Chiral Quaternary Ammonium Bromides for Asymmetric Phase-Transfer Catalysis
Ooi, Takashi; Uematsu, Yukitaka; Kameda, Minoru; Maruoka, Keiji
Angew. Chem., Int. Ed. 2002, 41, 1551-1554.
10.1002/1521-3773
-
62.
Catalytic Meerwein-Ponndorf-Verley (MPV) and Oppenauer (OPP) Reactions: Remarkable Acceleration of the Hydride Transfer by Powerful Bidentate Aluminum Alkoxides
Ooi, Takashi; Miura, Tomoya; Itagaki, Yoshifumi; Ichikawa, Hayato; Maruoka, Keiji
Synthesis. 2002, 279-291.
DOI: 10.1055/s-2002-19802
-
61.
Esterification of Carboxylic Acids Catalyzed by in Situ Generated Tetraalkylammonium Fluorides
Ooi, Takashi; Sugimoto, Hayato; Doda, Kanae; Maruoka, Keiji
Tetrahedron Lett. 2001, 42, 9245-9248.
doi:10.1016/S0040-4039(01)02035-4
-
60.
A Convergent, Homochiral Bis(amino alcohol) for Obtaining High Enantioselectivity in the Addition of Diethylzinc to Aldehydes
Ooi, Takashi; Saito, Akira; Maruoka, Keiji
Chem. Lett. 2001, 1108-1109.
doi:10.1246/cl.2001.1108
-
59.
Practical Approach to the Meerwein-Ponndorf-Verley Reduction of Carbonyl Substrates with New Aluminum Catalysts
Ooi, Takashi; Ichikawa, Hayato; Maruoka, Keiji
Angew. Chem., Int. Ed. 2001, 40,3610-3612.
10.1002/1521-3773
-
58.
Concise, Catalytic Asymmetric Synthesis of Tetrahydroisoquinoline- and Dihydroisoquinoline-3-carboxylic Acid Derivatives
Ooi, Takashi; Takeuchi, Mifune; Maruoka, Keiji
Synthesis. 2001, 1716-1718.
DOI: 10.1055/s-2001-16747
-
57.
Advantage of Anaerobic Conditions in the Highly Enantioselective Synthesis of α,α-Dialkyl-α-amino Acids by Chiral Phase-Transfer Catalysis
Ooi, Takashi; Takeuchi, Mifune; Ohara, Daisuke; Maruoka, Keiji
Synlett. 2001, 1185-1187.
DOI: 10.1055/s-2001-15167
-
56.
o-(o-Iodophenyl)phenylselenenyl Ethers/t-BuLi System as an Alkyllithium Equivalent with Structural Variations
Ooi, Takashi; Sakai, Daiki; Takada, Mio; Komatsu, Naoki; Maruoka, Keiji
Synlett. 2001, 791-792.
DOI: 10.1055/s-2001-14622
-
55.
Utilization of o-[(Z)-2-Trimethylsilyl-2-iodovinyl]phenylthio Derivatives as Carbon Radical Precursors by Anchimeric Approach
Ooi, Takashi; Furuya, Mayumi; Sakai, Daiki; Hokke, Yasutoshi; Maruoka, Keiji
Synlett. 2001, 541-543.
DOI: 10.1055/s-2001-12338
-
54.
Distinct Advantage of the in Situ Generation of Quaternary Ammonium Fluorides under Phase-Transfer Conditions toward Catalytic Asymmetric Synthesis
Ooi, Takashi; Doda, Kanae; Maruoka, Keiji
Org. Lett. 2001, 3, 1273-1276.
DOI: 10.1021/ol000382d
-
53.
Rapid and Mild Generation of Carbon Radicals from o-(o-Iodophenyl)phenylthio Derivatives by an Anchimeric Approach
Ooi, Takashi; Furuya, Mayumi; Sakai, Daiki; Maruoka, Keiji
Adv. Synt. Catal. 2001, 343, 166-168.
10.1002/1615-4169
-
52.
Facile Conversion of Trialkylsilyl Esters to Alkyl Esters Mediated by Tetrabutylammonium Fluoride Trihydrate
Ooi, Takashi; Sugimoto, Hayato; Maruoka, Keiji
Heterocycles. 2001, 54, 593-596.
DOI:
-
51.
Remarkable Template Effect of a Lewis Acid Receptor in Intramolecular Radical Cyclization: Control of Reaction Pathway as well as Stereochemistry
Ooi, Takashi; Hokke, Yasutoshi; Tayama, Eiji; Maruoka, Keiji
Tetrahedron. 2001, 57, 135-144.
doi:10.1016/S0040-4020(00)01007-3
-
50.
Zr(OBut)4 as an Effective Promoter for the Meerwein-Ponndorf-Verley Alkynylation and Cyanation of Aldehydes: Development of a New Asymmetric Cyanohydrin Synthesis
Ooi, Takashi; Miura, Tomoya; Takaya, Keisuke; Ichikawa, Hayato; Maruoka, Keiji
Tetrahedron. 2001, 57, 867-873.
doi:10.1016/S0040-4020(00)01040-1
-
49.
Facile Synthesis of L-Dopa tert-Butyl Ester by Catalytic Enantioselective Phase-Transfer Alkylation
Ooi, Takashi; Kameda, Minoru; Tannai, Hidenori; Maruoka, Keiji
Tetrahedron Lett. 2000, 41, 8339-8342.
doi:10.1016/S0040-4039(00)01443-X
-
48.
Dramatic Rate Enhancement by Ultrasonic Irradiation in Liquid-Liquid Phase-Transfer Catalytic Reactions
Ooi, Takashi; Tayama, Eiji; Doda, Kanae; Takeuchi, Mifune; Maruoka, Keiji
Synlett. 2000, 41, 1500-1502.
DOI: 10.1055/s-2000-7652
-
47.
Chiral Zirconium Alkoxides-Mediated Asymmetric Meerwein-Ponndorf-Verley Cyanation of Aldehydes
Ooi, Takashi; Takaya, Keisuke; Miura, Tomoya; Ichikawa, Hayato; Maruoka, Keiji
Synlett. 2000, 41, 1133-1134.
DOI: 10.1055/s-2000-6761
-
46.
Unique Synthetic Utility of BF3・OEt2 in the Highly Diastereoselective Reduction of Hydroxy Carbonyl and Dicarbonyl Substrates
Ooi, Takashi; Uraguchi, Daisuke; Morikawa, Junko; Maruoka, Keiji
Org. Lett. 2000, 2, 2015-2017.
DOI: 10.1055/s-2000-6761
-
45.
Practical Catalytic Enantioselective Synthesis of α,α-Dialkyl-α-amino Acids by Chiral Phase-Transfer Catalysis
Ooi, Takashi; Takeuchi, Mifune; Kameda, Minoru; Maruoka, Keiji
J. Am. Chem. Soc. 2000, 122, 5228-5229.
DOI: 10.1021/ja0007051
-
44.
Efficient Catalytic Procedure for Etherification of Alcohols with MeAl(NTf2)2
Ooi, Takashi; Ichikawa, Hayato; Itagaki, Yoshifumi; Maruoka, Keiji
Heterocycles. 2000, 52, 575-578.
DOI:
-
43.
Zr(OtBu)4 as a New Promoter for the Meerwein-Ponndorf-Verley Alkynylation and Cyanation of Aldehydes
Ooi, Takashi; Takaya, Keisuke; Miura, Tomoya; Maruoka, Keiji
Synlett. 2000, 69-70.
DOI: 10.1055/s-2000-6476
-
42.
"Amphiphilic" Cleavage of γ-Stannyl Ketones with ATPH/RLi: Application to Enone Fragmentation by the Conjugate Addition-Cleavage Sequence
Kondo, Yuichiro; Kon-i, Kana; Iwasaki, Atsuko; Ooi, Takashi; Maruoka, Keiji
Angew. Chem., Int. Ed. 2000, 39, 414-416.
DOI:
-
41.
Highly Efficient Amphiphilic Cleavage of γ-Iodo Carbonyl Substrates with Aluminum Tris(2,6-diphenylphenoxide)/t-BuLi System
Kondo, Yuichiro; Kon-I, Kana; Ooi, Takashi; Maruoka, Keiji
Tetrahedron Lett. 1999, 40, 9041-9044.
doi:10.1016/S0040-4039(99)01718-9
-
40.
Catalytic, High-Speed Tishchenko Reaction Using (2,7-Dimethyl-1,8-biphenylenedioxy)bis(diisopropoxyaluminum) as a Powerful Bidentate Catalyst
Ooi, Takashi; Miura, Tomoya; Takaya, Keisuke; Maruoka, Keiji
Tetrahedron Lett. 1999, 40, 7695-7698.
doi:10.1016/S0040-4039(99)01555-5
-
39.
Remarkable Catalytic Activity of Me3Ga in the Alkylation of Hetero-Substituted Epoxides with Alkynyllithiums
Ooi, Takashi; Morikawa, Junko; Ichikawa, Hayato; Maruoka, Keiji
Tetrahedron Lett. 1999, 40, 5881-5884.
doi:10.1016/S0040-4039(99)01096-5
-
38.
Molecular Design of a C2-Symmetric Chiral Phase-Transfer Catalyst for Practical Asymmetric Synthesis of α-Amino Acids
Ooi, Takashi; Kameda, Minoru; Maruoka, Keiji
J. Am. Chem. Soc. 1999, 121, 6519-6520.
DOI: 10.1021/ja991062w
-
37.
Efficient Synthesis of Aromatic sec-Amides from Esters. Synthetic Utility of Dilithium Amides
Ooi, Takashi; Tayama, Eiji; Yamada, Masao; Maruoka, Keiji
Synlett. 1999, 729-730.
DOI: 10.1055/s-1999-2731
-
36.
Hypercoordination of Aluminum: Evidence for the Implication of Pentacoordinate Complexes in the R2AlCl-Promoted Reduction of Alkoxycarbonyl Substrates
Ooi, Takashi; Morikawa, Junko; Uraguchi, Daisuke; Maruoka, Keiji
Tetrahedron Lett. 1999, 40, 2993-2996.
doi:10.1016/S0040-4039(99)00401-3
-
35.
Pentacoordinate Organoaluminum Chemistry: Catalytic Efficiency of Me3Al in the Epoxide Cleavage with Alkynyllithiums
Ooi, Takashi; Kagoshima, Naoko; Ichikawa, Hayato; Maruoka, Keiji
J. Am. Chem. Soc. 1999, 121, 3328-3333.
DOI: 10.1021/ja9842464
-
34.
Simultaneous Functional Group Manipulation in the Meerwein-Ponndorf-Verley Reduction Process Catalyzed by Bidentate Aluminum Reagent
Ooi, Takashi; Itagaki, Yoshifumi; Miura, Tomoya; Maruoka, Keiji
Tetrahedron Lett. 1999, 40, 2137-2138.
doi:10.1016/S0040-4039(99)00131-8
-
33.
Unique Property of Copper(I) Chloride as a Radical Initiator as well as a Lewis Acid: Application to CuCl-Catalyzed Aldol Reaction of α,β-Unsaturated Ketones with Bu3SnH
Ooi, Takashi; Doda, Kanae; Sakai, Daiki; Maruoka, Keiji
Tetrahedron Lett. 1999, 40, 2133-2136.
doi:10.1016/S0040-4039(99)00130-6
-
32.
Unprecedented Encapsulation of Carbonyl Guest with Designer Lewis Acid Receptor
Ooi, Takashi; Kondo, Yuichiro; Maruoka, Keiji
Angew. Chem., Int. Ed. 1998, 37, 3039-3041.
DOI:
-
31.
Pentacoordinate vs. Tetracoordinate Complexation for Alkoxycarbonyl Compounds with Dialkylboron Triflates and Trifluoroacetates
Ooi, Takashi; Uraguchi, Daisuke; Maruoka, Keiji
Tetrahedron Lett. 1998, 39, 8105-8108.
doi:10.1016/S0040-4039(98)01798-5
-
30.
Highly Efficient, Catalytic Meerwein-Ponndorf-Verley Reduction with a Novel Bidentate Aluminum Catalyst
Ooi, Takashi; Miura, Tomoya; Maruoka, Keiji
Angew. Chem., Int. Ed. 1998, 37, 2347-2349.
DOI:
-
29.
First Meerwein-Ponndorf-Verley Alkynylation: Nonorganometallic Way for Carbonyl Alkylations
Ooi, Takashi; Miura, Tomoya; Maruoka, Keiji
J. Am. Chem. Soc. 1998, 120, 10790-10791.
DOI: 10.1021/ja9821347
-
28.
Organoaluminum-Promoted Selective Addition to Fluorinated Carbonyl Compounds via Pentacoordinate Trialkylaluminum Complexes
Ooi, Takashi; Kagoshima, Naoko; Uraguchi, Daisuke; Maruoka, Keiji
Tetrahedron Lett. 1998, 39, 7105-7108.
doi:10.1016/S0040-4039(98)01508-1
-
27.
Facile and Selective Alkylation of 3,3,3-Trifluoropropene Oxide with Organoaluminum Reagents via Pentacoordinate Trialkylaluminum Complexes
Ooi, Takashi; Furuya, Mayumi; Maruoka, Keiji
Chem. Lett. 1998, 817-818.
doi:10.1246/cl.1998.817
-
26.
Dilithium 2,2'-Methylenebis(4,6-di-tert-butylphenoxide) as a Bidentate Lewis Acid in Organic Synthesis
Ooi, Takashi; Saito, Akira; Maruoka, Keiji
Tetrahedron Lett. 1998, 39, 3745-3748.
doi:10.1016/S0040-4039(98)00575-9
-
25.
Selective Conjugate Alkylation by Alkyllithium Nucleophiles of α,β,γ,δ-Unsaturated Aldehydes with Functionalized Lewis Acid Receptors
Ooi, Takashi; Kondo, Yuichiro; Kon-i, Kana; Maruoka, Keiji
Chem. Lett. 1998, 403-404.
doi:10.1246/cl.1998.403
-
24.
SHypercoordination of Boron and Aluminum: Synthetic Utility as Chelating Lewis Acids
Ooi, Takashi; Uraguchi, Daisuke; Kagoshima, Naoko; Maruoka, Keiji
J. Am. Chem. Soc. 1998, 120, 5327-5328.
DOI: 10.1021/ja9736828
-
23.
Rate acceleration in Nucleophilic Alkylation of Carbonyl Compounds with a New Template Containing Two Metallic Centers
Ooi, Takashi; Takahashi, Makoto; Maruoka, Keiji
Angew. Chem., Int. Ed. 1998, 37, 835-837.
DOI:
-
22.
Organoaluminum-Promoted Rearrangement of Epoxysilanes to α-Silylaldehydes
Ooi, Takashi; Kiba, Toshitaka; Maruoka, Keiji
Chem. Lett. 1997, 519-520.
doi:10.1246/cl.1997.519
-
21.
Bidentate Organoaluminum Lewis Acid for Selective Activation of Carbonyl Over Acetal Functionality: Chemoselective Functionalization
Ooi, Takashi; Tayama, Eiji; Takahashi, Makoto; Maruoka, Keiji
Tetrahedron Lett. 1997, 38, 7403-7406.
doi:10.1016/S0040-4039(97)01735-8
-
20.
Organoaluminum-Catalyzed Alkylation by tert-Alkyl Fluorides: Synthetic utility of the Al-F interaction
Ooi, Takashi; Uraguchi, Daisuke; Kagoshima, Naoko; Maruoka, Keiji
Tetrahedron Lett. 1997, 38, 5679-5682.
doi:10.1016/S0040-4039(97)01237-9
-
19.
Conjugate Allylation to α,β-Unsaturated Aldehydes with the New Chemzyme p-F-ATPH
Ooi, Takashi; Kondo, Yuichiro; Maruoka, Keiji
Angew. Chem., Int. Ed. Engl. 1997, 36, 1183-1185.
DOI:
-
18.
Remarkable Template Effect of a Lewis Acidic Receptor in Intramolecular Radical Cyclizations
Ooi, Takashi; Hokke, Yasutoshi; Maruoka, Keiji
Angew. Chem., Int. Ed. Engl. 1997, 36, 1181-1183.
DOI:
-
17.
Evaluation of Several Fluorinated ATPH Derivatives as Functionalized Lewis Acid Receptors for Conjugate Alkylation to α,β-Unsaturated Aldehydes with Alkyllithium Nucleophiles
Ooi, Takashi; Kondo, Yuichiro; Miura, Tomoya; Maruoka, Keiji
Tetrahedron Lett. 1997, 38, 3951-3954.
doi:10.1016/S0040-4039(97)00787-9
-
16.
Conjugate Allylation to α,β-Unsaturated Aldehydes with Amphiphilic Alkylation System, ATPH/Allylcerium Reagents
Ooi, Takashi; Miura, Tomoya; Kondo, Yuichiro; Maruoka, Keiji
Tetrahedron Lett. 1997, 38, 3947-3950.
doi:10.1016/S0040-4039(97)00786-7
-
15.
Fluorine-Assisted Selective Alkylation to Fluorinated Epoxides and Carbonyl Compounds: Implication of Pentacoordinate Trialkylaluminum Complexes
Ooi, Takashi; Kagoshima, Naoko; Maruoka, Keiji
J. Am. Chem. Soc. 1997, 119, 5754-5755.
DOI: 10.1021/ja964113n
-
14.
Organoaluminum-Promoted Cyclization of Olefinic Epoxides. A New and Stereoselective Approach to Cyclohexane Frameworks
Murase, Noriaki; Maruoka, Keiji; Ooi, Takashi; Yamamoto, Hisashi
Bull. Chem. Soc. Jpn. 1997, 70, 707-711.
doi:10.1246/bcsj.70.707
-
13.
(2,7-Dimethyl-1,8-biphenylenedioxy)bis(dimethylaluminum) as a Bidentate Lewis Acid: Its Reactivity and Selectivity in Organic Synthesis
Ooi, Takashi; Takahashi, Makoto; Maruoka, Keiji
J. Am. Chem. Soc. 1996, 118, 11307-11308.
doi:10.1246/bcsj.70.707
-
12.
Asymmetric Diels-Alder Reaction of Unsymmetrical Maleates. A Chemical Access to Chiral, Unsymmetrical cis-Cyclohexene-1,2-dicarboxylates
Maruoka, Keiji; Akakura, Matsujiro; Saito, Susumu; Ooi, Takashi; Yamamoto, Hisashi
J. Am. Chem. Soc. 1994, 116, 6153-8.
DOI: 10.1021/ja00093a013
-
11.
Unprecedented Stereochemical Control in the Intramolecular Ene-Reactions of δ,ε-Unsaturated Aldehydes Using Exceptionally Bulky Organoaluminum Reagents: Elucidation of the Transition State
Ooi, Takashi; Maruoka, Keiji; Yamamoto, Hisashi
Tetrahedron. 1994, 50, 6505-22.
doi:10.1016/S0040-4020(01)89682-4
-
10.
Lewis Acid-Promoted Selective Rearrangement of Trisubstituted Epoxides to Aldehydes or Ketones
Maruoka, Keiji; Murase, Noriaki; Bureau, Ronan; Ooi, Takashi; Yamamoto, Hisashi
Tetrahedron. 1994, 50, 3663-72.
doi:10.1016/S0040-4020(01)90389-8
-
9.
Migratory Aptitude of Alkyl Substituents in the MABR-Promoted Epoxide Rearrangement [MABR = Methylaluminum Bis(4-bromo-2,6-di-tert-butylphenoxide)]
Maruoka, Keiji; Ooi, Takashi; Yamamoto, Hisashi
Tetrahedron. 1992, 48, 3303-12.
doi:10.1016/0040-4020(92)85006-Z
-
8.
A New Cyclization of Olefinic Epoxides by Modified Organoaluminum Reagents via Epoxide Rearrangement and Subsequent Intramolecular Ene Reaction
Maruoka, Keiji; Murase, Noriaki; Ooi, Takashi; Yamamoto, Hisashi
Synlett. 1991, 857-8.
DOI: 10.1055/s-1991-20901
-
7.
Organoaluminum-Catalyzed Rearrangement of Epoxides. A Facile Route to the Synthesis of Optically Active β-Siloxy Aldehydes
Maruoka, Keiji; Ooi, Takashi; Nagahara, Shigeru; Yamamoto, Hisashi
Tetrahedron. 1991, 47, 6983-98.
doi:10.1016/S0040-4020(01)96153-8
-
6.
A New Stereoselective Approach to Oxygenated Carbocycles: Asymmetric Synthesis of the Cyclohexyl Fragment of FK-506
Maruoka, Keiji; Saito, Susumu; Ooi, Takashi; Yamamoto, Hisashi
Synlett. 1991, 579-80.
DOI: 10.1055/s-1991-21983
-
5.
Selective Rearrangement of Trisubstituted Epoxides to Aldehydes or Ketones
Maruoka, Keiji; Bureau, Ronan; Ooi, Takashi; Yamamoto, Hisashi
Synlett. 1991, 491-2.
DOI: 10.1055/s-1991-20773
-
4.
Selective Reduction of Methylenecycloalkane Oxides with 4-Substituted Diisobutylaluminum 2,6-Di-tert-butylphenoxides
Maruoka, Keiji; Saito, Susumu; Ooi, Takashi; Yamamoto, Hisashi
Synlett. 1991, 255-6.
DOI: 10.1055/s-1991-20698
-
3.
Unprecedented Stereochemical Control in the Organoaluminum-Promoted Intramolecular Ene Reactions of δ,ε-Unsaturated Aldehydes
Maruoka, Keiji; Ooi, Takashi; Yamamoto, Hisashi
J. Am. Chem. Soc. 1990, 112, 9011-12.
DOI: 10.1021/ja00180a073
-
2.
An Efficient, Catalytic Procedure for Epoxide Rearrangement
Maruoka, Keiji; Nagahara, Shigeru; Ooi, Takashi; Yamamoto, Hisashi
Tetrahedron Lett. 1989, 30, 5607-10.
doi:10.1016/S0040-4039(01)93811-0
-
1.
Organoaluminum-Promoted Rearrangement of Epoxy Silyl Ethers to β-Siloxy Aldehydes
Maruoka, Keiji; Ooi, Takashi; Yamamoto, Hisashi
J. Am. Chem. Soc. 1989, 111, 6431-2.
DOI: 10.1021/ja00198a070