Search filters

Authors whose works are in public domain in at least one jurisdiction

List of works by Takashi Ohshima

3-Mono-Substituted BINOL Phosphoric Acids as Effective Organocatalysts in Direct Enantioselective Friedel-Crafts-Type Alkylation of N-Unprotected α-Ketiminoester

scientific article published on 10 September 2018

A New Entry in Catalytic Alkynylation of Aldehydes and Ketones:  Dual Activation of Soft Nucleophiles and Hard Electrophiles by an Indium(III) Catalyst

scientific article published on 01 March 2005

A compact X-ray free-electron laser emitting in the sub-ångström region

A compact free-electron laser for generating coherent radiation in the extreme ultraviolet region

A novel anti-microtubule agent with carbazole and benzohydrazide structures suppresses tumor cell growth in vivo.

scientific article published on 7 May 2015

A practical large-scale synthesis of enantiomerically pure 3-[bis(methoxycarbonyl)methyl]cyclohexanone via catalytic asymmetric Michael reaction

A short scalable route to (-)-α-kainic acid using Pt-catalyzed direct allylic amination

scientific article published on 21 January 2015

A tetranuclear-zinc-cluster-catalyzed practical and versatile deprotection of acetates and benzoates

scientific article published on 26 August 2010

Additive effects of amines on asymmetric hydrogenation of quinoxalines catalyzed by chiral iridium complexes

scientific article published on 22 August 2012

Amino Acid Schiff Base Bearing Benzophenone Imine As a Platform for Highly Congested Unnatural α-Amino Acid Synthesis

scientific article published on 22 April 2020

An Expeditious Route to trans-Configured Tetrahydrothiophenes Enabled by Fe(OTf)3 -Catalyzed [3+2] Cycloaddition of Donor-Acceptor Cyclopropanes with Thionoesters

scientific article published on 25 March 2018

Asymmetric alkynylation of aldehydes catalyzed by an In(III)/BINOL complex.

scientific article

Bioconjugation with Thiols by Benzylic Substitution

scientific article published on 19 February 2018

Boronic Acid Accelerated Three-Component Reaction for the Synthesis of α-Sulfanyl-Substituted Indole-3-acetic Acids

scientific article published on 01 November 2017

C1-symmetric Rh/Phebox-catalyzed asymmetric alkynylation of α-ketoesters

scientific article published on 30 May 2011

Catalytic Aerobic Chemoselective α-Oxidation of Acylpyrazoles en Route to α-Hydroxy Acid Derivatives.

scientific article published on 30 May 2017

Catalytic Aerobic Cross-Dehydrogenative Coupling of Azlactones en Route to α,α-Disubstituted α-Amino Acids

scientific article published on 12 May 2020

Catalytic Enantioselective Decarboxylative Mannich-Type Reaction of N-Unprotected Isatin-Derived Ketimines

scientific article published on 14 August 2018

Catalytic asymmetric Michael reaction of beta-keto esters: effects of the linker heteroatom in linked-BINOL.

scientific article published in December 2003

Catalytic asymmetric epoxidation of alpha,beta-unsaturated esters using an yttrium-biphenyldiol complex.

scientific article published in June 2005

Catalytic asymmetric epoxidation of alpha,beta-unsaturated esters with chiral yttrium-biaryldiol complexes

scientific article published on 01 February 2007

Catalytic asymmetric phase-transfer Michael reaction and Mannich-type reaction of glycine Schiff bases with tartrate-derived diammonium salts

scientific article published on 01 June 2007

Catalytic asymmetric synthesis of alpha,beta-epoxy esters, aldehydes, amides, and gamma,delta-epoxy beta-keto esters: unique reactivity of alpha,beta-unsaturated carboxylic acid imidazolides

scientific article published on 01 September 2001

Catalytic asymmetric synthesis of both syn- and anti-3,5-dihydroxy esters: application to 1,3-polyol/alpha-pyrone natural product synthesis

scientific article published on 01 February 2003

Chemoselective Catalytic α-Oxidation of Carboxylic Acids: Iron/Alkali Metal Cooperative Redox Active Catalysis

scientific article published on 24 February 2020

Chemoselective catalytic conjugate addition of alcohols over amines

scientific article published on 22 January 2014

Cleavage of unactivated amide bonds by ammonium salt-accelerated hydrazinolysis

scientific article published on 01 October 2014

Direct Access to N-Unprotected α- and/or β-Tetrasubstituted Amino Acid Esters via Direct Catalytic Mannich-Type Reactions Using N-Unprotected Trifluoromethyl Ketimines.

scientific article published on 26 September 2017

Direct Catalytic Chemoselective α-Amination of Acylpyrazoles: A Concise Route to Unnatural α-Amino Acid Derivatives

scientific article published on 18 February 2016

Direct catalytic asymmetric aldol reaction: synthesis of either syn- or anti-alpha,beta-dihydroxy ketones.

scientific article published in March 2001

Direct catalytic asymmetric aldol-Tishchenko reaction.

scientific article

Direct catalytic enantio- and diastereoselective aldol reaction using a Zn-Zn-linked-BINOL complex: a practical synthesis of syn-1,2-diols

scientific article published on 01 May 2001

Direct conversion of esters, lactones, and carboxylic acids to oxazolines catalyzed by a tetranuclear zinc cluster.

scientific article published on 24 May 2006

Direct substitution of the hydroxy group with highly functionalized nitrogen nucleophiles catalyzed by Au(III)

scientific article published on 21 June 2011

Direct use of allylic alcohols for platinum-catalyzed monoallylation of amines.

scientific article published on 21 July 2007

Dual platinum and pyrrolidine catalysis in the direct alkylation of allylic alcohols: selective synthesis of monoallylation products

scientific article published on 6 March 2014

Dynamic ligand exchange of the lanthanide complex leading to structural and functional transformation: one-pot sequential catalytic asymmetric epoxidation-regioselective epoxide-opening process

scientific article published on 01 February 2005

Dynamic structural change of the self-assembled lanthanum complex induced by lithium triflate for direct catalytic asymmetric aldol-Tishchenko reaction.

scientific article published in September 2005

Enantio- and diastereoselective catalytic Mannich-type reaction of a glycine schiff base using a chiral two-center phase-transfer catalyst.

scientific article published in July 2005

Enantioselective total syntheses of several bioactive natural products based on the development of practical asymmetric catalysis.

scientific article published in September 2004

Enantioselective total synthesis of (-)-strychnine using the catalytic asymmetric Michael reaction and tandem cyclization.

scientific article published in December 2002

Enzyme-like catalysis via ternary complex mechanism: alkoxy-bridged dinuclear cobalt complex mediates chemoselective O-esterification over N-amidation

scientific article published on 12 April 2013

Enzyme-like chemoselective acylation of alcohols in the presence of amines catalyzed by a tetranuclear zinc cluster.

scientific article published on 13 February 2008

Extreme ultraviolet free electron laser seeded with high-order harmonic of Ti:sapphire laser

scientific article

General asymmetric hydrogenation of 2-alkyl- and 2-aryl-substituted quinoxaline derivatives catalyzed by iridium-difluorphos: unusual halide effect and synthetic application

scientific article published on 30 April 2012

Highly Enantio- and s-trans C=C bond selective catalytic hydrogenation of cyclic enones: alternative synthesis of (-)-menthol.

scientific article

Isomeric methoxy analogs of nimesulide for development of brain cyclooxygense-2 (COX-2)-targeted imaging agents: Synthesis, in vitro COX-2-inhibitory potency, and cellular transport properties

scientific article published on 8 October 2015

Lanthanum(III) triflate catalyzed direct amidation of esters

scientific article published on 24 March 2014

Ligand accelerated indium(iii)-catalyzed asymmetric alkynylation of aldehydes with 2-methyl-3-butyn-2-ol as an ethyne equivalent donor

scientific article published on 01 December 2006

Microwave-assisted deacylation of unactivated amides using ammonium-salt-accelerated transamidation

scientific article published on 10 July 2012

Platinum-catalyzed direct amination of allylic alcohols under mild conditions: ligand and microwave effects, substrate scope, and mechanistic study

scientific article published in October 2009

Platinum-catalyzed direct amination of allylic alcohols with aqueous ammonia: selective synthesis of primary allylamines.

scientific article published on 15 November 2011

Radiolabeled γ-polyglutamic acid complex as a nano-platform for sentinel lymph node imaging.

scientific article

Rh-catalyzed direct enantioselective alkynylation of α-ketiminoesters.

scientific article published on 13 May 2013

Rhodium(I)/Chiral Diene-Catalyzed Enantioselective Addition of Boronic Acids to N-Unsubstituted Isatin-Derived Ketimines

scientific article published on 24 January 2020

Scandium(III) Triflate Catalyzed Direct Synthesis of N-Unprotected Ketimines

scientific article published on 19 December 2019

Short synthesis of (+)-cylindricine C by using a catalytic asymmetric Michael reaction with a two-center organocatalyst

scientific article published on 01 July 2006

Sodium methoxide: a simple but highly efficient catalyst for the direct amidation of esters.

scientific article published on 27 April 2012

Stable operation of a self-amplified spontaneous-emission free-electron laser in the extremely ultraviolet region

Strategy for Catalytic Chemoselective Cross-Enolate Coupling Reaction via a Transient Homocoupling Dimer

scientific article published on 31 May 2018

Synthesis and Biological Activity of Sarcodictyins

scientific article published on 01 June 1998

Theoretical study of Al(III)-catalyzed conversion of glyoxal to glycolic acid: dual activated 1,2-hydride shift mechanism by protonated Al(OH)3 species.

scientific article

Time-interleaved multienergy acceleration for an x-ray free-electron laser facility

Transesterification of various methyl esters under mild conditions catalyzed by tetranuclear zinc cluster.

scientific article published on 10 June 2008

Unique reactivity of alpha,beta-unsaturated carboxylic acid imidazolides: catalytic asymmetric synthesis of alpha,beta-epoxy esters and alpha,beta-epoxy carboxylic acid derivatives

scientific article published on 01 May 2003

Unprecedented halide dependence on catalytic asymmetric hydrogenation of 2-aryl- and 2-alkyl-substituted quinolinium salts by using Ir complexes with difluorphos and halide ligands

scientific article published on 01 October 2009

Zinc-catalyzed cycloisomerizations. Synthesis of substituted furans and furopyrimidine nucleosides.

scientific article published on 3 July 2008

μ-Oxo-Dinuclear-Iron(III)-Catalyzed O-Selective Acylation of Aliphatic and Aromatic Amino Alcohols and Transesterification of Tertiary Alcohols.

scientific article

Paulina is supported by:

About Paulina

Help