Organocatalytic Asymmetric Reaction Cascade to Substituted Cyclohexylamines

Jian Zhou and Benjamin List*
Max-Planck-Institut fr Kohlenforschung, D-45470 Mlheim an der Ruhr, Germany
J. Am. Chem. Soc., 2007, 129 (24), pp 7498–7499
DOI: 10.1021/ja072134j
Publication Date (Web): May 27, 2007
Copyright © 2007 American Chemical Society
*

In papers with more than one author, the asterisk indicates the name of the author to whom inquiries about the paper should be addressed.

, list@mpi-muelheim.mpg.de

Abstract

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We report a new strategy for organocatalytic cascade reactions. Accordingly, enamine catalysis, iminium catalysis, and Brønsted acid catalysis can work in concert in a highly enantioselective organocatalytic cascade sequence toward chiral cis-3-substituted cyclohexylamines. We found that an achiral amine in combination with a catalytic amount of a chiral Brønsted acid can accomplish an aldol addition−dehydration−conjugate reduction−reductive amination to provide potential intermediates of pharmaceutically active compounds in good yields and excellent enantioselectivities.

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History

  • Published In Issue June 20, 2007
  • Received March 27, 2007

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