Copper-catalyzed deacetonative Sonogashira coupling

Org Biomol Chem. 2022 Oct 5;20(38):7650-7657. doi: 10.1039/d2ob01267g.

Abstract

A convenient Pd- and phosphine-free protocol for assembling internal alkynes from tertiary propargyl alcohols and (het)aryl halides has been developed. The proposed tandem approach includes the base-promoted retro-Favorskii fragmentation followed by Cu-catalyzed C(sp)-C(sp2) cross-coupling. The use of inexpensive reagents (e.g. a catalyst, additives, a base, and a solvent) and good functional group tolerance make the procedure practical and cost-effective. The synthetic utility of the method was demonstrated by a smooth alkynylation of vinyl iodides derived from natural steroidal hormones.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Alkynes
  • Catalysis
  • Copper*
  • Hormones
  • Iodides*
  • Solvents

Substances

  • Alkynes
  • Hormones
  • Iodides
  • Solvents
  • Copper