K
Katsumi Nishimura
Researcher at Kyoto University
Publications - 35
Citations - 764
Katsumi Nishimura is an academic researcher from Kyoto University. The author has contributed to research in topics: Chiral ligand & Lithium. The author has an hindex of 14, co-authored 35 publications receiving 736 citations. Previous affiliations of Katsumi Nishimura include Kobe Pharmaceutical University.
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Journal ArticleDOI
Steric Tuning of Reactivity and Enantioselectivity in Addition of Thiophenol to Enoates Catalyzed by an External Chiral Ligand
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Thiol-catalyzed acyl radical cyclization of alkenals.
TL;DR: Thiol-catalyzed direct generation of acyl radicals and their intramolecular addition to olefins of alkenals gave 2-substituted five- and six-membered cyclic ketones in reasonably good yields.
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Total synthesis of (-)-neplanocin a by using lithium thiolate-initiated Michael-aldol tandem cyclization reaction.
TL;DR: (-)-Neplanocin A (1), S-adenosylhomocystein hydrolase inhibitor, was synthesized using TBS-protected chiral omega-oxo-alpha,beta-unsaturated ester 16, which was prepared from D-mannitol to give three separable cyclization products in good yields and stereoselectivity.
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The conjugate addition-aldol tandem reaction of α,β-unsaturated esters catalyzed by lithium benzenethiolate
TL;DR: In this paper, α,β-unsaturated esters with aldehydes were catalyzed by 0.2 equiv of lithium benzenethiolate in the presence of phenyl trimethylsilyl sulfide to afford the conjugate addition-aldol tandem reaction products in the anti stereoselectivity and good to high yields.
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Chiral Amino Ether-Controlled Catalytic Enantioselective Arylthiol Conjugate Additions to α,β-Unsaturated Esters and Ketones: Scope, Structural Requirements, and Mechanistic Implications
TL;DR: Asymmetric conjugate addition reaction of 2-trimethylsilylbenzenethiol with enoates and enones is catalyzed by a chiral amino ether-lithium thiolate complex and affords adducts with high enantioselectivity.