Organocatalytic enantioselective Michael-Michael-Michael-aldol condensation reactions: control of five stereocenters in a quadruple-cascade asymmetric synthesis of highly functionalized hexahydrophenanthrenes. 2014

Arun Raja, and Bor-Cherng Hong, and Gene-Hsiang Lee
Department of Chemistry and Biochemistry, National Chung Cheng University , Chia-Yi, 621, Taiwan, R.O.C.

A cascade organocatalysis has been developed for the enantioselective synthesis of a highly functionalized hexahydrophenanthrene-2-carbaldehyde containing five contiguous stereogenic centers with high diastereoselectivity and high enantioselectivity (>99% ee). The one-pot method comprises a cascade of organocatalytic Michael-Michael-Michael-aldol reactions of 2-methyl-1,5-dinitro-3-((E)-2-nitrovinyl)benzene and α,β-unsaturated aldehydes (e.g., cinnamaldehyde). The structure and absolute configuration of a product were confirmed by X-ray analysis of an appropriate derivative.

UI MeSH Term Description Entries

Related Publications

Arun Raja, and Bor-Cherng Hong, and Gene-Hsiang Lee
January 2007, Angewandte Chemie (International ed. in English),
Arun Raja, and Bor-Cherng Hong, and Gene-Hsiang Lee
May 2016, Chemical communications (Cambridge, England),
Arun Raja, and Bor-Cherng Hong, and Gene-Hsiang Lee
February 2012, Chemical communications (Cambridge, England),
Arun Raja, and Bor-Cherng Hong, and Gene-Hsiang Lee
April 2006, Journal of the American Chemical Society,
Copied contents to your clipboard!