Efficient approach for the design of effective chiral quaternary phosphonium salts in asymmetric conjugate additions

Chiral Phosphine Catalyzed Asymmetric Michael Addition of Oxindoles

(2012) Fangrui Zhong et al.   ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

Asymmetric Michael Addition of N-Boc-Protected Oxindoles to Nitroalkenes Catalyzed by a Chiral Secondary Amine

(2012) Chuan Wang et al.   CHEMISTRY-A EUROPEAN JOURNAL

New Neutral Reaction System with Crown Ether-KCl Complexes in Aqueous Solution

(2012) Seiji Shirakawa et al.   CHEMISTRY-A EUROPEAN JOURNAL

Organocatalytic, Asymmetric Synthesis of 3-SulfenylatedN-Boc-Protected Oxindoles

(2012) Chuan Wang et al.   CHEMISTRY-A EUROPEAN JOURNAL

Bifunctional Chiral Quaternary Ammonium Salt Catalysts: A Rapidly Emerging Class of Powerful Asymmetric Catalysts

(2012) Johanna Novacek et al.   EUROPEAN JOURNAL OF ORGANIC CHEMISTRY

The direct catalytic asymmetric aldol reaction of α-substituted nitroacetates with aqueous formaldehyde under base-free neutral phase-transfer conditions

(2012) Seiji Shirakawa et al.   ORGANIC & BIOMOLECULAR CHEMISTRY

Chiral quaternary phosphonium salts: a new class of organocatalysts

(2012) Dieter Enders et al.   ORGANIC & BIOMOLECULAR CHEMISTRY

Highly Enantioselective Organocatalytic Sulfenylation of 3-Aryloxindoles

(2012) Zhiqiang Han et al.   ORGANIC LETTERS

A New Family of Cinchona-Derived Bifunctional Asymmetric Phase-Transfer Catalysts: Application to the Enantio- and Diastereoselective Nitro-Mannich Reaction of Amidosulfones

(2012) Kayli M. Johnson et al.   ORGANIC LETTERS

Catalytic Asymmetric Sulfenylation of Unprotected 3-Substituted Oxindoles

(2012) Yunfei Cai et al.   ORGANIC LETTERS

Enantioselective Organocatalyzed Sulfenylation of 3-Substituted Oxindoles

(2012) Xin Li et al.   ORGANIC LETTERS

Asymmetric Neutral Amination of Nitroolefins Catalyzed by Chiral Bifunctional Ammonium Salts in Water-Rich Biphasic Solvent

(2011) Lijia Wang et al.   ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

Enantioselective Base-Free Electrophilic Amination of Benzofuran-2(3H)-ones: Catalysis by Binol-Derived P-Spiro Quaternary Phosphonium Salts

(2011) Chuan-Le Zhu et al.   ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

Catalytic Enantioselective Total Synthesis of Hodgkinsine B

(2011) Robert H. Snell et al.   ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

Structural Study-Guided Development of Versatile Phase-Transfer Catalysts for Asymmetric Conjugate Additions of Cyanide

(2011) Brian A. Provencher et al.   ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

Dioxindole in Asymmetric Catalytic Synthesis: Routes to Enantioenriched 3-Substituted 3-Hydroxyoxindoles and the Preparation of Maremycin A

(2011) Giulia Bergonzini et al.   ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

Diastereo- and enantioselective conjugate addition of α-substituted nitroacetates to maleimides under base-free neutral phase-transfer conditions

(2011) Seiji Shirakawa et al.   CHEMICAL COMMUNICATIONS

Highly enantioselective Michael addition of 2-oxindoles to vinyl selenone in RTILs catalyzed by a Cinchona alkaloid-based thiourea

(2011) Tao Zhang et al.   CHEMICAL COMMUNICATIONS

Structure, Bioactivity and Synthesis of Natural Products with Hexahydropyrrolo[2,3-b]indole

(2011) Pau Ruiz-Sanchis et al.   CHEMISTRY-A EUROPEAN JOURNAL

A Systematic Investigation of Quaternary Ammonium Ions as Asymmetric Phase-Transfer Catalysts. Synthesis of Catalyst Libraries and Evaluation of Catalyst Activity

(2011) Scott E. Denmark et al.   JOURNAL OF ORGANIC CHEMISTRY

Amino-Indanol-Catalyzed Asymmetric Michael Additions of Oxindoles to Protected 2-Amino-1-nitroethenes for the Synthesis of 3,3′-Disubstituted Oxindoles Bearing α,β-Diamino Functionality

(2011) Xiong-Li Liu et al.   JOURNAL OF ORGANIC CHEMISTRY

Concise Total Synthesis and Stereochemical Revision of (+)-Naseseazines A and B: Regioselective Arylative Dimerization of Diketopiperazine Alkaloids

(2011) Justin Kim et al.   JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

Chiral 1,2,3-Triazoliums as New Cationic Organic Catalysts with Anion-Recognition Ability: Application to Asymmetric Alkylation of Oxindoles

(2011) Kohsuke Ohmatsu et al.   JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

Chiral Calcium VAPOL Phosphate Mediated Asymmetric Chlorination and Michael Reactions of 3-Substituted Oxindoles

(2011) Wenhua Zheng et al.   JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

Facile Synthesis of Enantioenriched Cγ-Tetrasubstituted α-Amino Acid Derivatives via an Asymmetric Nucleophilic Addition/Protonation Cascade

(2011) Shu-Wen Duan et al.   ORGANIC LETTERS

Psychotripine: A New Trimeric Pyrroloindoline Derivative fromPsychotria pilifera

(2011) Xiao-Ning Li et al.   ORGANIC LETTERS

Catalytic Asymmetric Synthesis of Oxindoles Bearing a Tetrasubstituted Stereocenter at the C-3 Position

(2010) Feng Zhou et al.   ADVANCED SYNTHESIS & CATALYSIS

Stereocontrolled Creation of All-Carbon Quaternary Stereocenters by Organocatalytic Conjugate Addition of Oxindoles to Vinyl Sulfone

(2010) Qiang Zhu et al.   ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

Highly practical amino acid and alkaloid synthesis using designer chiral phase transfer catalysts as high-performance organocatalysts

(2010) Keiji Maruoka   CHEMICAL RECORD

Asymmetric Conjugate Addition of Oxindoles to 2-Chloroacrylonitrile: A Highly Effective Organocatalytic Strategy for Simultaneous Construction of 1,3-Nonadjacent Stereocenters Leading to Chiral Pyrroloindolines

(2010) Xin Li et al.   CHEMISTRY-A EUROPEAN JOURNAL

Catalytic Asymmetric Protonation of α-Amino Acid-Derived Ketene Disilyl Acetals UsingP-Spiro Diaminodioxaphosphonium Barfates as Chiral Proton

(2010) Daisuke Uraguchi et al.   JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

Phosphonium Salt Organocatalysis

(2009) Thomas Werner   ADVANCED SYNTHESIS & CATALYSIS

Phosphonium Salts as Chiral Phase-Transfer Catalysts: Asymmetric Michael and Mannich Reactions of 3-Aryloxindoles

(2009) Rongjun He et al.   ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

Cinchona-based phase-transfer catalysts for asymmetric synthesis

(2009) Sang-sup Jew et al.   CHEMICAL COMMUNICATIONS

Chiral bifunctional phase transfer catalysts for asymmetric fluorination of β-keto esters

(2009) Xisheng Wang et al.   CHEMICAL COMMUNICATIONS

Organocatalysis—after the gold rush

(2009) Søren Bertelsen et al.   CHEMICAL SOCIETY REVIEWS

Asymmetric Iminium Ion Catalysis with a Novel Bifunctional Primary Amine Thiourea: Controlling Adjacent Quaternary and Tertiary Stereocenters

(2009) Patrizia Galzerano et al.   CHEMISTRY-A EUROPEAN JOURNAL

Chiral Arylaminophosphonium Barfates as a New Class of Charged Brønsted Acid for the Enantioselective Activation of Nonionic Lewis Bases

(2009) Daisuke Uraguchi et al.   JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

Enantioselective Base-Free Phase-Transfer Reaction in Water-Rich Solvent

(2009) Rongjun He et al.   JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

Thiourea-Catalyzed Highly Enantio- and Diastereoselective Additions of Oxindoles to Nitroolefins: Application to the Formal Synthesis of (+)-Physostigmine

(2009) Tommy Bui et al.   JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

A Homodinuclear Mn(III)2−Schiff Base Complex for Catalytic Asymmetric 1,4-Additions of Oxindoles to Nitroalkenes

(2009) Yuko Kato et al.   JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

Asymmetric Michael addition reaction of 3-substituted-N-Boc oxindoles to activated terminal alkenes catalyzed by a bifunctional tertiary-amine thiourea catalyst

(2009) Xin Li et al.   ORGANIC & BIOMOLECULAR CHEMISTRY

Naseseazines A and B: A New Dimeric Diketopiperazine Framework from a Marine-Derived Actinomycete,Streptomycessp.

(2009) Ritesh Raju et al.   ORGANIC LETTERS

Chiral Organic Ion Pair Catalysts Assembled Through a Hydrogen-Bonding Network

(2009) D. Uraguchi et al.   SCIENCE

Enantioselective addition of oxindoles to aliphatic α,β-unsaturated aldehydes

(2009) Natalia Bravo et al.   TETRAHEDRON LETTERS

Binaphthyl-Modified Quaternary Phosphonium Salts as Chiral Phase-Transfer Catalysts: Asymmetric Amination of β-Keto Esters

(2008) Rongjun He et al.   ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

Asymmetric Organocatalysis: From Infancy to Adolescence

(2008) Alessandro Dondoni et al.   ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

Site-Directed Asymmetric Quaternization of a Peptide Backbone at a C-Terminal Azlactone

(2008) Daisuke Uraguchi et al.   ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

Combinatorial Design of Simplified High-Performance Chiral Phase-Transfer Catalysts for Practical Asymmetric Synthesis of α-Alkyl- and α,α-Dialkyl-α-Amino Acids

(2008) Masanori Kitamura et al.   Chemistry-An Asian Journal

Synthesis of Enantiopure 1-r-Alkyl-2-c,5-t-Diphenylphospholanes and Phospholanium Salts through Direct Alkylation of Phospholane

(2008) Cristian Dobrota et al.   EUROPEAN JOURNAL OF ORGANIC CHEMISTRY

Pestalazines and Pestalamides, Bioactive Metabolites from the Plant Pathogenic FungusPestalotiopsis theae

(2008) Gang Ding et al.   JOURNAL OF NATURAL PRODUCTS

Chiral Tetraaminophosphonium Carboxylate-Catalyzed Direct Mannich-Type Reaction

(2008) Daisuke Uraguchi et al.   JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

The advent and development of organocatalysis

(2008) David W. C. MacMillan   NATURE

Practical Aspects of Recent Asymmetric Phase-Transfer Catalysis

(2008) Keiji Maruoka   ORGANIC PROCESS RESEARCH & DEVELOPMENT