Palladium-catalyzed intramolecular 5-exo-dig hydroarylations of N-arylpropiolamides: thermodynamics-controlled stereoselective synthesis of 3-methyleneoxindoles

J Org Chem. 2009 Nov 20;74(22):8834-7. doi: 10.1021/jo901963g.

Abstract

Palladium-catalyzed intramolecular hydroarylation of N-arylpropiolamides has been developed for the stereoselective synthesis of 3-(monosubstituted methylene)oxindoles. In the presence of Pd(OAc)(2) and dppf, a variety of N-arylpropiolamides successfully underwent the intramolecular hydroarylation reaction to afford the corresponding 3-(monosubstituted-methylene)oxindoles in moderate to excellent yields. It is noteworthy that the stereoselectivity of the reaction can be controlled by varying the reaction temperature.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amides / chemistry*
  • Catalysis
  • Indoles / chemical synthesis*
  • Indoles / chemistry
  • Molecular Structure
  • Organometallic Compounds / chemistry*
  • Oxindoles
  • Palladium / chemistry*
  • Stereoisomerism
  • Thermodynamics*

Substances

  • Amides
  • Indoles
  • Organometallic Compounds
  • Oxindoles
  • 3-methyleneoxindole
  • Palladium