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Your search keyword '"Cheng, Shuanghua"' showing total 3 results
Start Over Author "Cheng, Shuanghua" Topic michael reaction
3 results on '"Cheng, Shuanghua"'

1. Enantioselective Synthesis of Azaflavanones Using Organocatalytic 6- endo Aza-Michael Addition.

Author

Cheng, Shuanghua, Zhao, Lili, and Yu, Shouyun

Subjects
*ENANTIOSELECTIVE catalysis, *MICHAEL reaction, *CHEMICAL reactions, *CONJUGATE addition reactions, *SURFACE chemistry
Abstract

A method to prepare highly enantioenriched azaflavanones using an organocatalytic 6- endo aza-Michael addition has been described. A variety of 2-aryl-, 2-vinyl- and 2-methylazaflavanones were prepared in good yields (53-84%) and excellent enantioselectivities (97.6:2.4 to 99.3:0.7 er). [ABSTRACT FROM AUTHOR]

Published
2014
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2. ChemInform Abstract: Enantioselective Synthesis of 3-Substituted 1,2-Oxazinanes via Organocatalytic Intramolecular Aza-Michael Addition.

Author

Cheng, Shuanghua and Yu, Shouyun

Subjects
*ENANTIOSELECTIVE catalysis, *ORGANOCATALYSIS, *INTRAMOLECULAR catalysis, *MICHAEL reaction, *CARBONYL compounds
Abstract

A variety of 3-substituted 1,2-oxazinanes (II) is obtained by quinine-catalyzed intramolecular aza-Michael reaction of enones (I) with moderate to high enantioselectivity. [ABSTRACT FROM AUTHOR]

Published
2015
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3. ChemInform Abstract: Enantioselective Synthesis of Azaflavanones Using Organocatalytic 6-endo Aza-Michael Addition.

Author

Cheng, Shuanghua, Zhao, Lili, and Yu, Shouyun

Subjects
*QUINOLINE derivatives, *FLAVANONES, *ORGANOCATALYSIS, *MICHAEL reaction, *AZA compounds
Abstract

The optimized conditions allow the highly enantioselective conversion of 2-aminochalcones into 2-substituted azaflavanones via intramolecular 6-endo aza-Michael addition. [ABSTRACT FROM AUTHOR]

Published
2014
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