A new generation of chiral phase-transfer catalysts

Enantioselective Synthesis of Quaternary Carbon Stereocenters: Addition of 3-Substituted Oxindoles to Vinyl Sulfone Catalyzed by Pentanidiums

(2015) Lili Zong et al.   ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

Bifunctional phase-transfer catalysis in the asymmetric synthesis of biologically active isoindolinones

(2015) Antonia Di Mola et al.   Beilstein Journal of Organic Chemistry

Stronger Brønsted Acids: Recent Progress

(2015) Takahiko Akiyama et al.   CHEMICAL REVIEWS

Catalytic Asymmetric Cyanation of Alkylideneindolenines Generated from Sulfonylalkylindoles

(2015) Kohsuke Ohmatsu et al.   CHEMISTRY LETTERS

Dipeptide-Derived Multifunctional Quaternary Phosphonium Salt Catalyzed Asymmetric Cyclizations via a Tandem Michael Addition/SN2 Sequence

(2015) Dongdong Cao et al.   CHEMISTRY-A EUROPEAN JOURNAL

Enantioselective Synthesis of Dialkylated α-Hydroxy Carboxylic Acids through Asymmetric Phase-Transfer Catalysis

(2015) Shaobo Duan et al.   JOURNAL OF ORGANIC CHEMISTRY

Asymmetric Fluorolactonization with a Bifunctional Hydroxyl Carboxylate Catalyst

(2015) Hiromichi Egami et al.   JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

Measurement of State-Specific Association Constants in Allosteric Sensors through Molecular Stapling and NMR

(2015) Kody J. Moleschi et al.   JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

Asymmetric α-chlorination of β-ketoesters using bifunctional ammonium salt catalysis

(2015) Johanna Novacek et al.   MONATSHEFTE FUR CHEMIE

Contemporary Asymmetric Phase Transfer Catalysis: Large-Scale Industrial Applications

(2015) Jiajing Tan et al.   ORGANIC PROCESS RESEARCH & DEVELOPMENT

Enantioselective desymmetrization of meso-aziridines with aromatic thiols catalyzed by chiral bifunctional quaternary phosphonium salts derived from α-amino acids

(2015) Jiaxing Zhang et al.   TETRAHEDRON

Enantioselective α-amination enabled by a BINAM-derived phase-transfer catalyst

(2015) H. M. Nelson et al.   Chemical Science

Design of chiral urea-quaternary ammonium salt hybrid catalysts for asymmetric reactions of glycine Schiff bases

(2015) Maximilian Tiffner et al.   RSC Advances

Phase-Transfer-Catalyzed Asymmetric SNAr Reaction of α-Amino Acid Derivatives with Arene Chromium Complexes

(2014) Seiji Shirakawa et al.   ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

Catalytic Enantioselective Alkylation of Sulfenate Anions to Chiral Heterocyclic Sulfoxides Using Halogenated Pentanidium Salts

(2014) Lili Zong et al.   ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

Catalytic Asymmetric Synthesis of 3,3′-Diaryloxindoles as Triarylmethanes with a Chiral All-Carbon Quaternary Center: Phase-Transfer-Catalyzed SNAr Reaction

(2014) Seiji Shirakawa et al.   ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

Chiral Anion Phase Transfer of Aryldiazonium Cations: An Enantioselective Synthesis of C3-Diazenated Pyrroloindolines

(2014) Hosea M. Nelson et al.   ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

Complete Field Guide to Asymmetric BINOL-Phosphate Derived Brønsted Acid and Metal Catalysis: History and Classification by Mode of Activation; Brønsted Acidity, Hydrogen Bonding, Ion Pairing, and Metal Phosphates

(2014) Dixit Parmar et al.   CHEMICAL REVIEWS

A Base-Free Neutral Phase-Transfer Reaction System

(2014) Seiji Shirakawa et al.   Chemistry-An Asian Journal

Cyclopeptoids as Phase-Transfer Catalysts for the Enantioselective Synthesis of α-Amino Acids

(2014) Rosaria Schettini et al.   EUROPEAN JOURNAL OF ORGANIC CHEMISTRY

Asymmetric Phase-Transfer Catalysis with Homo- and Heterochiral Quaternary Ammonium Salts: A Theoretical Study

(2014) Galina P. Petrova et al.   JOURNAL OF PHYSICAL CHEMISTRY B

Effect of Brønsted acid co-catalyst in asymmetric conjugate addition of 3-aryloxindoles to maleimide under base-free phase-transfer conditions

(2014) Seiji Shirakawa et al.   TETRAHEDRON

Asymmetric phase-transfer reactions under base-free neutral conditions

(2014) Seiji Shirakawa et al.   TETRAHEDRON LETTERS

Phase-Transfer-Catalyzed Asymmetric α-Arylation of α-Amino Acid Derivatives

(2014) Seiji Shirakawa et al.   Asian Journal of Organic Chemistry

Amino Acid-Derived Phosphonium Salts-Catalyzed Michael Addition of 3-Substituted Oxindoles

(2013) Xiaoyu Wu et al.   ADVANCED SYNTHESIS & CATALYSIS

Methylene-Bridged Bis(imidazoline)-Derived 2-Oxopyrimidinium Salts as Catalysts for Asymmetric Michael Reactions

(2013) Andrey E. Sheshenev et al.   ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

Recent Developments in Asymmetric Phase-Transfer Reactions

(2013) Seiji Shirakawa et al.   ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

Enantioselective Organocatalytic Fluorination-Induced Wagner-Meerwein Rearrangement

(2013) Fedor Romanov-Michailidis et al.   ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

Thiourea-phosphonium salts from amino acids: cooperative phase-transfer catalysts in the enantioselective aza-Henry reaction

(2013) Dongdong Cao et al.   CHEMICAL COMMUNICATIONS

Syntheses and Applications of (Thio)Urea-Containing Chiral Quaternary Ammonium Salt Catalysts

(2013) Johanna Novacek et al.   EUROPEAN JOURNAL OF ORGANIC CHEMISTRY

Asymmetric Alkylation of α-Cyanosulfones Catalyzed by Chiral 1,2,3-Triazolium Salts

(2013) Takashi Ooi et al.   HETEROCYCLES

Asymmetric Substitution at the Tetrasubstituted Chiral Carbon: Catalytic Ring-Opening Alkylation of Racemic 2,2-Disubstituted Aziridines with 3-Substituted Oxindoles

(2013) Kohsuke Ohmatsu et al.   JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

Enantioselective Alkylation by Binaphthyl Chiral Phase-Transfer Catalysts: A DFT-Based Conformational Analysis

(2013) Takashi Kamachi et al.   ORGANIC LETTERS

Design of Chiral Bifunctional Quaternary Phosphonium Bromide Catalysts Possessing an Amide Moiety

(2013) Seiji Shirakawa et al.   ORGANIC LETTERS

Phase-Transfer-Catalyzed Asymmetric Conjugate Cyanation of Alkylidenemalonates with KCN in the Presence of a Brønsted Acid Additive

(2013) Yan Liu et al.   ORGANIC LETTERS

Novel bifunctional thiourea–ammonium salt catalysts derived from amino acids: application to highly enantio- and diastereoselective aza-Henry reaction

(2013) Hong-Yu Wang et al.   TETRAHEDRON

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

(2013) Seiji Shirakawa et al.   Chemical Science

Cation-directed enantioselective synthesis of quaternary-substituted indolenines

(2013) Meiling Li et al.   Chemical Science

Enantioselective Addition of Thiols to Imines Catalyzed by Thiourea–Quaternary Ammonium Salts

(2013) Hong-Yu Wang et al.   ACS Catalysis

Cascade reactions of glycine Schiff bases and chiral phase transfer catalysts in the synthesis of α-amino acids 3-substituted phthalides or isoindolinones

(2013) Milena Perillo et al.   RSC Advances

Catalytic asymmetric Mannich-type reactions of α-cyano α-sulfonyl carbanions

(2012) Kohsuke Ohmatsu et al.   CHEMICAL COMMUNICATIONS

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

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

The progression of chiral anions from concepts to applications in asymmetric catalysis

(2012) Robert J. Phipps et al.   Nature 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

Quantum Mechanical Transition-State Analysis Reveals the Precise Origin of Stereoselectivity in Chiral Quaternary Cinchonidinium Phase-Transfer Catalyzed Enolate Allylation

(2012) Thomas C. Cook 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

Pentanidium–Catalyzed Enantioselective α-Hydroxylation of Oxindoles Using Molecular Oxygen

(2012) Yuanyong Yang 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

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

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

Pentanidium-Catalyzed Enantioselective Phase-Transfer Conjugate Addition Reactions

(2011) Ting Ma 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

Design, synthesis, and application of tartaric acid derived N-spiroquaternary ammonium salts as chiral phase-transfer catalysts

(2011) Mario Waser et al.   ORGANIC & BIOMOLECULAR CHEMISTRY

Asymmetric Electrophilic Fluorination Using an Anionic Chiral Phase-Transfer Catalyst

(2011) V. Rauniyar et al.   SCIENCE

BINOL-based azacrown ether catalyzed enantioselective Michael addition: asymmetric synthesis of α-aminophosphonates

(2011) Truong Son Pham et al.   TETRAHEDRON-ASYMMETRY

A Chiral-Anion Generator: Application to Catalytic Desilylative Kinetic Resolution of Silyl-Protected Secondary Alcohols

(2010) Hailong Yan et al.   ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

Chiral Phosphoric Acids as Versatile Catalysts for Enantioselective Carbon–Carbon Bond Forming Reactions

(2010) Masahiro Terada   BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN

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

(2010) Keiji Maruoka   CHEMICAL RECORD

Organocatalytic Asymmetric Cyanosilylation of Nitroalkenes

(2010) Pablo Bernal et al.   CHEMISTRY-A EUROPEAN JOURNAL

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

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

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

Asymmetric Synthesis of Substituted α-Amino Phosphonates with Chiral Crown Ethers as Catalysts

(2009) Zsuzsa Jászay et al.   SYNLETT

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

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

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

Binaphthol-derived phosphoric acid as a versatile catalyst for enantioselective carbon–carbon bond forming reactions

(2008) Masahiro Terada   CHEMICAL COMMUNICATIONS

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

Practical Aspects of Recent Asymmetric Phase-Transfer Catalysis

(2008) Keiji Maruoka   ORGANIC PROCESS RESEARCH & DEVELOPMENT

Combinatorial approach for the design of new, simplified chiral phase-transfer catalysts with high catalytic performance for practical asymmetric synthesis of α-alkyl-α-amino acids

(2008) Masanori Kitamura et al.   TETRAHEDRON LETTERS