Transformation of acid chlorides into aldehydes by reduction of in-situ formed acyltributylphosphonium ions with zinc-copper couple or zinc

Article abstract of DOI:10.1016/0040-4039(95)00262-B

Transformation of acid chlorides into the corresponding aldehydes without over-reduction to alcohols was effectively achieved by the reduction of acyltributylphosphonium ions, formed in-situ from the chlorides and tributylphosphine in CH₃CN, with Zn-Cu couple or Zn in the presence of CH₃SO₃H under an N₂ atmosphere.