Synthesis of condensed pyrroloindoles via Pd-catalyzed intramolecular C-H bond functionalization of pyrroles

J Am Chem Soc. 2008 Dec 3;130(48):16158-9. doi: 10.1021/ja806897h.

Abstract

A new strategy for the synthesis of condensed hetero- or carbocycles such as pyrroloindoles or fluorenes has been developed that involves the Pd-catalyzed cyclization of readily available N-(2-halobenzyl)pyrroles or their phenyl derivatives. The reaction is proposed to proceed via oxidative addition of benzylic halides to Pd(0) followed by base-assisted C-H bond activation. A broad range of condensed cyclic products could be obtained in good to excellent yields under mild conditions.

MeSH terms

  • Carbon / chemistry*
  • Catalysis
  • Cyclization
  • Hydrogen / chemistry*
  • Indoles / chemical synthesis*
  • Indoles / chemistry
  • Molecular Structure
  • Palladium / chemistry*
  • Pyrroles / chemistry*

Substances

  • Indoles
  • Pyrroles
  • Palladium
  • Carbon
  • Hydrogen