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1. Organocatalytic Enantioselective Tandem Michael Addition and Cyclization Reaction of Trisubstituted 2-Nitro-1,3-enynes with Cyclic 1,3-Diketones.

Author

Xing, Zi ‐ Min, Song, Le ‐ Le, Li, Feng ‐ Xing, Xu, Nian ‐ Sheng, Wang, Lu ‐ Feng, Shi, Zi ‐ Fa, and Cao, Xiao ‐ Ping

Subjects
*ORGANOCATALYSIS, *ENANTIOSELECTIVE catalysis, *MICHAEL reaction, *RING formation (Chemistry), *KETONES, *AMIDES
Abstract

An enantioselective tandem Michael addition/cyclization reaction between trisubstituted 2-nitro-1,3-enynes and cyclic 1,3-diketones catalyzed by a chiral organosquaramide catalyst in the presence of Ag2CO3 was developed. The chiral functionalized chromene products could be obtained in good yield and in 80-99% enantiomeric excess. The structures and absolute configurations of some of the products were confirmed by X-ray crystallographic analysis. [ABSTRACT FROM AUTHOR]

Published
2017
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