Pd(II)-catalyzed enantioselective oxidative tandem cyclization reactions. Synthesis of indolines through C-N and C-C bond formation

J Am Chem Soc. 2006 Mar 15;128(10):3130-1. doi: 10.1021/ja060291x.

Abstract

We have developed an efficient Pd(II)-catalyzed enantioselective oxidative tandem cyclization strategy using molecular oxygen as a green oxidant for the double 5-exo-trig cyclizations of N-(2-allylaryl) amides to afford a variety of indolines in good yields without the formation of undesired monocyclization products. By employing Pd(TFA)2/(-)-sparteine as the chiral catalyst, we obtained tandem cyclization products with high enantioselectivity (up to 91% ee).

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Catalysis
  • Cyclization
  • Indoles / chemical synthesis*
  • Oxidation-Reduction
  • Oxygen / chemistry
  • Palladium / chemistry
  • Sparteine / chemistry
  • Stereoisomerism

Substances

  • Indoles
  • Sparteine
  • Palladium
  • indoline
  • Oxygen