Novel Synthesis of Dienones and Enones from Propargyl Alcohols and Allyl Alcohols with 2, 2-Dimethoxypropane: Synthesis of Ionone and Irone

Abstract

A new synthetic procedure for dienone derivatives, i.e., ionone and irone, is described. The key step is the pyrolytic rearrangement of allyl alcohols and 2, 2-dimethoxypropane in the presence of an acid anhydride and phosphoric acid.