Remarkable access to fluoroalkylated trisubstituted alkenes via highly stereoselective cobalt-catalyzed hydrosilylation reaction of fluoroalkylated alkynes

Org Biomol Chem. 2009 Mar 21;7(6):1167-70. doi: 10.1039/b819476a. Epub 2009 Jan 29.

Abstract

Hydrosilylation reaction of various fluoroalkylated alkynes with Et(3)SiH in the presence of a catalytic amount of Co(2)(CO)(8) was investigated. The hydrosilylation of the alkynes having fluoroalkyl and aryl groups took place smoothly with good regioselectivity (ca. 80:20). In sharp contrast, the reaction of the alkynes having a fluoroalkyl group and a benzyl-type substituent, or various propargyl alcohols gave the corresponding vinylsilanes in an excellent regio- and stereoselective manner. Treatment of the vinylsilanes with various aldehydes in the presence of Zn(OTf)(2) and TBAF afforded the coupling products in good yields.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Alkenes / chemical synthesis*
  • Alkenes / chemistry
  • Alkynes / chemistry*
  • Catalysis
  • Cobalt / chemistry*
  • Hydrocarbons, Fluorinated / chemical synthesis*
  • Hydrocarbons, Fluorinated / chemistry*
  • Molecular Structure
  • Silicon Compounds / chemistry*
  • Stereoisomerism

Substances

  • Alkenes
  • Alkynes
  • Hydrocarbons, Fluorinated
  • Silicon Compounds
  • Cobalt