Fe/Cr- and Co/Cr-mediated catalytic asymmetric 2-haloallylations of aldehydes

J Am Chem Soc. 2004 Oct 6;126(39):12248-9. doi: 10.1021/ja045557j.

Abstract

The first example to couple aldehydes and 3-bromo-2-halopropenes in a catalytic asymmetric manner is reported. The coupling reaction is effected by the use of a chiral sulfonamide-Cr complex (prepared in situ from 1d, CrBr3, Fe(III) or from Co(II), Et3N, and Mn), TMSCl, and 2,6-lutidine. The method reported here is operationally simple and scalable, furnishing 3-halohomoallylic alcohols with a synthetically useful level of enantiomeric excess.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Aldehydes / chemistry*
  • Allyl Compounds / chemical synthesis
  • Allyl Compounds / chemistry*
  • Catalysis
  • Chromium / chemistry*
  • Cobalt / chemistry*
  • Hydrocarbons, Halogenated / chemistry
  • Iron / chemistry*

Substances

  • Aldehydes
  • Allyl Compounds
  • Hydrocarbons, Halogenated
  • Chromium
  • Cobalt
  • Iron