TANDEM CARBENE INSERTION SEMIPINACOL REARRANGEMENT OF 1-ALKYNYLCYCLOBUTENOLS - A FACILE SYNTHESIS OF 2-ALKENYL-4-CYCLOPENTENE-1,3-DIONES


ZORA M. , HERNDON J. W.

JOURNAL OF ORGANIC CHEMISTRY, vol.59, no.4, pp.699-701, 1994 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Letter
  • Volume: 59 Issue: 4
  • Publication Date: 1994
  • Doi Number: 10.1021/jo00083a002
  • Title of Journal : JOURNAL OF ORGANIC CHEMISTRY
  • Page Numbers: pp.699-701

Abstract

Reaction of chromium carbene complexes and 1-alkynylcyclobutenols leads to 2-alkenyl-4-cyclopentene-1,3-diones. Initial allkyne insertion affords a highly electrophilic carbene complex, which then undergoes an alkyl shift-ring expansion, ultimately producing 2-alkenyl-4-cyclopentene-1,3-diones.