Pd-catalyzed α-arylation of α,α-difluoroketones with aryl bromides and chlorides. A route to difluoromethylarenes

J Am Chem Soc. 2014 Mar 19;136(11):4149-52. doi: 10.1021/ja501117v. Epub 2014 Mar 10.

Abstract

We report the Pd-catalyzed α-arylation of α,α-difluoroketones with aryl and heteroaryl bromides and chlorides catalyzed by an air- and moisture-stable palladacyclic complex containing P(t-Bu)Cy2 as ligand. The combination of this Pd-catalyzed arylation and base-induced cleavage of the acyl-aryl C-C bond within the α-aryl-α,α-difluoroketone constitutes a one-pot, two-step procedure to synthesize difluoromethylarenes from aryl halides. A broad range of electronically varied aryl and heteroaryl bromides and chlorides underwent these two transformations, providing α-aryl-α,α-difluoroketones, difluoromethylarenes, and difluoromethylheteroarenes in high yields.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Catalysis
  • Hydrocarbons, Brominated / chemistry*
  • Hydrocarbons, Chlorinated / chemistry*
  • Hydrocarbons, Fluorinated / chemical synthesis*
  • Hydrocarbons, Fluorinated / chemistry
  • Ketones / chemistry*
  • Molecular Structure
  • Palladium / chemistry*

Substances

  • Hydrocarbons, Brominated
  • Hydrocarbons, Chlorinated
  • Hydrocarbons, Fluorinated
  • Ketones
  • Palladium