One-pot asymmetric synthesis of seven-membered carbocycles cyclohepta[b]indoles via a sequential organocatalytic Michael/double Friedel-Crafts alkylation reaction

Org Lett. 2013 Aug 2;15(15):3914-7. doi: 10.1021/ol4016749. Epub 2013 Jul 12.

Abstract

A new method has been developed for the enantioselective synthesis of highly functionalized cyclohepta[b]indoles with high enantioselectivity (up to 96% ee). The process combines an enantioselective organocatalytic Michael addition and a highly efficient double Friedel-Crafts reaction sequence in one pot with good yields and stereoselectivity. The structures and absolute configurations of the products were confirmed by X-ray analysis.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Alkylation
  • Catalysis
  • Hydrocarbons, Cyclic / chemical synthesis*
  • Hydrocarbons, Cyclic / chemistry
  • Indoles / chemical synthesis*
  • Indoles / chemistry
  • Molecular Structure
  • Stereoisomerism

Substances

  • Hydrocarbons, Cyclic
  • Indoles