N-heterocyclic carbene-catalyzed [4 + 2] cycloaddition of ketenes and 3-aroylcoumarins: highly enantioselective synthesis of dihydrocoumarin-fused dihydropyranones

N-Heterocyclic Carbene Catalysis: Enantioselective Formal [2+2] Cycloaddition of Ketenes and N-Sulfinylanilines

(2011) Teng-Yue Jian et al.   ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

Formal [3+2] Cycloaddition of Ketenes and Oxaziridines Catalyzed by Chiral Lewis Bases: Enantioselective Synthesis of Oxazolin-4-ones

(2010) Pan-Lin Shao et al.   ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

Synthesis of Densely Substituted Trans-Configured 4-Acylated Piperidine-2,4-diones as 3:1 Adducts of Imines and Ketenes

(2010) José Cabrera et al.   JOURNAL OF ORGANIC CHEMISTRY

Double Diastereoselective, Nucleophile-Catalyzed Aldol Lactonizations (NCAL) Leading to β-Lactone Fused Carbocycles and Extensions to β-Lactone Fused Tetrahydrofurans

(2010) Kay A. Morris et al.   ORGANIC LETTERS

N-Heterocyclic Carbene-Mediated Enantioselective Addition of Phenols to Unsymmetrical Alkylarylketenes

(2009) Carmen Concellón et al.   ADVANCED SYNTHESIS & CATALYSIS

Catalytic Asymmetric Cycloaddition of Ketenes and Nitroso Compounds: Enantioselective Synthesis of α-Hydroxycarboxylic Acid Derivatives

(2009) Maximilian Dochnahl et al.   ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

Control of Chemoselectivity by Counteranions of Cationic Palladium Complexes: A Convenient Enantioselective Synthesis of Dihydrocoumarins

(2009) Xiuling Han et al.   ORGANIC LETTERS

Catalytic, asymmetric reactions of ketenes and ketene enolates

(2009) Daniel H. Paull et al.   TETRAHEDRON

Asymmetric Dimerization of Disubstituted Ketenes Catalyzed by N-Heterocyclic Carbenes

(2008) Hui Lv et al.   ADVANCED SYNTHESIS & CATALYSIS

[4+2] Cycloaddition of Ketenes withN-Benzoyldiazenes Catalyzed by N-Heterocyclic Carbenes

(2008) Xue-Liang Huang et al.   ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

ChiralN-Heterocyclic Carbene-Catalyzed Formal [4+2] Cycloaddition of Ketenes with Enones: Highly Enantioselective Synthesis oftrans- andcis-δ-Lactones

(2008) Yan-Rong Zhang et al.   CHEMISTRY-A EUROPEAN JOURNAL

N-Heterocyclic carbene catalysed β-lactam synthesis

(2008) Nicolas Duguet et al.   ORGANIC & BIOMOLECULAR CHEMISTRY

Asymmetric Cycloadditions ofo-Quinone Methides Employing Chiral Ammonium Fluoride Precatalysts

(2008) Ethan Alden-Danforth et al.   ORGANIC LETTERS

Synthesis of enantiopure triazolium salts from pyroglutamic acid and their evaluation in the benzoin condensation

(2008) Dieter Enders et al.   TETRAHEDRON-ASYMMETRY

Chiral N-Heterocyclic Carbene Catalyzed Staudinger Reaction of Ketenes with Imines:  Highly Enantioselective Synthesis ofN-Boc β-Lactams

(2007) Yan-Rong Zhang et al.   ORGANIC LETTERS