Asymmetric direct vinylogous Michael reaction of activated alkenes to nitroolefins catalyzed by modified cinchona alkaloids

Org Lett. 2005 Nov 10;7(23):5293-6. doi: 10.1021/ol052283b.

Abstract

[reaction: see text] The first organocatalytic and asymmetric direct vinylogous Michael reaction that employs the electron-deficient vinyl malononitriles as the nucleophilic species has been reported. The novel transformations exhibit exclusive gamma-selectivity and high diastereo- and enantioselectivity in the addition to nitroolefins, which give the multifunctional products with two vicinal chiral centers.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Alkenes / chemistry*
  • Catalysis
  • Cinchona Alkaloids / chemistry*
  • Molecular Structure
  • Nitro Compounds / chemistry*
  • Stereoisomerism
  • Vinyl Compounds / chemistry*

Substances

  • Alkenes
  • Cinchona Alkaloids
  • Nitro Compounds
  • Vinyl Compounds