4.7 Article

Stereoselective α-Chlorination of β-Keto Esters in the Presence of Hybrid Amide-Based Cinchona Alkaloids as Catalysts

Related references

Note: Only part of the references are listed.
Article Chemistry, Organic

Asymmetric α-Chlorination of β-Keto Esters Using Hypervalent Iodine-Based Cl-Transfer Reagents in Combination with Cinchona Alkaloid Catalysts

Lotte Stockhammer et al.

Summary: This study introduces an unprecedented strategy for the asymmetric alpha-chlorination of beta-keto esters using simple Cinchona alkaloid catalysts and hypervalent iodine-based Cl-transfer reagents. The Cinchona species was found to act as a nucleophilic catalyst, generating a chiral electrophilic Cl-transfer reagent in situ, leading to good yields and enantioselectivities under operationally simple conditions.

EUROPEAN JOURNAL OF ORGANIC CHEMISTRY (2021)

Article Chemistry, Multidisciplinary

Synthesis of C2 Hybrid Amide-Based PTC Catalysts and Their Comparison with Saturated Analogues

Maciej Majdecki et al.

CHEMISTRYSELECT (2020)

Article Chemistry, Multidisciplinary

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

Johanna Novacek et al.

MONATSHEFTE FUR CHEMIE (2016)

Article Chemistry, Medicinal

Asymmetric Chlorination of β-Keto Esters Using Diaminomethylenemalononitrile Organocatalyst

Takaaki Sakai et al.

CHEMICAL & PHARMACEUTICAL BULLETIN (2016)

Review Chemistry, Organic

Organocatalyzed Assembly of Chlorinated Quaternary Stereogenic Centers

Melania Gomez-Martinez et al.

ASIAN JOURNAL OF ORGANIC CHEMISTRY (2016)

Article Chemistry, Multidisciplinary

Williamson Ether Synthesis with Phenols at a Tertiary Stereogenic Carbon: Formal Enantioselective Phenoxylation of β-Keto Esters

Kazutaka Shibatomi et al.

CHEMISTRY-A EUROPEAN JOURNAL (2015)

Article Chemistry, Organic

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

Johanna Novacek et al.

EUROPEAN JOURNAL OF ORGANIC CHEMISTRY (2014)

Review Chemistry, Organic

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

Johanna Novacek et al.

EUROPEAN JOURNAL OF ORGANIC CHEMISTRY (2013)

Review Chemistry, Organic

Catalytic Enantioselective α-Chlorination of Carbonyl Compounds

Kazutaka Shibatomi et al.

ASIAN JOURNAL OF ORGANIC CHEMISTRY (2013)

Article Chemistry, Applied

Catalytic Enantioselective Fluorination of α-Chloro-β-keto Esters in the Presence of Chiral Nickel Complexes

Seung Hee Kang et al.

ADVANCED SYNTHESIS & CATALYSIS (2010)

Article Chemistry, Multidisciplinary

Desymmetrization-like catalytic enantioselective fluorination of malonates and its application to pharmaceutically attractive molecules

Dhande Sudhakar Reddy et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2008)

Article Chemistry, Multidisciplinary

Cinchona alkaloid catalyzed enantioselective fluorination of allyl silanes, silyl enol ethers, and oxindoles

Takehisa Ishimaru et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2008)

Review Multidisciplinary Sciences

Fluorine in pharmaceuticals:: Looking beyond intuition

Klaus Mueller et al.

SCIENCE (2007)

Article Chemistry, Multidisciplinary

Organocatalytic asymmetric direct α-alkynylation of cyclic β-ketoesters

Thomas B. Poulsen et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2007)

Review Chemistry, Inorganic & Nuclear

Fluorine in medicinal chemistry: A review of anti-cancer agents

C Isanbor et al.

JOURNAL OF FLUORINE CHEMISTRY (2006)

Article Chemistry, Multidisciplinary

Asymmetric synthesis of chiral aldehydes by conjugate additions with bifunctional organocatalysis by cinchona alkaloids

Fanghui Wu et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2006)

Article Chemistry, Multidisciplinary

Catalytic enantioselective fluorination of oxindoles

Y Hamashima et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2005)

Article Chemistry, Multidisciplinary

Enantioselective organocatalytic α-fluorination of aldehydes

TD Beeson et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2005)

Article Chemistry, Multidisciplinary

Direct asymmetric alpha-fluorination of aldehydes

DD Steiner et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2005)

Article Chemistry, Multidisciplinary

Strategies for catalytic asymmetric electrophilic a halogenation of carbonyl compounds

M Oestreich

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2005)

Article Chemistry, Multidisciplinary

Enantioselective formation of stereogenic carbon-fluorine centers by a simple catalytic method

M Marigo et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2005)

Review Chemistry, Multidisciplinary

Asymmetric fluorination, trifluoromethylation, and perfluoroalkylation reactions

JA Ma et al.

CHEMICAL REVIEWS (2004)

Article Chemistry, Multidisciplinary

An efficient enantioselective fluorination of various β-ketoesters catalyzed chiral palladium complexes

Y Hamashima et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2002)

Article Chemistry, Multidisciplinary

A fundamentally new approach to enantioselective fluorination based on cinchona alkaloid derivatives/selectfluor combination

N Shibata et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2000)