One‐Carbon Homologation of α,β‐Unsaturated Aldehydes: Access to α‐Tertiary β,γ‐Unsaturated Aldehydes

Abstract An efficient protocol for the synthesis of enolizable α‐substituted β,γ‐unsaturated aldehydes is reported. The developed strategy involves two steps, epoxidation and Meinwald rearrangement, to result in a one‐carbon homologation of α,β‐unsaturated aldehydes enabling the insertion of a CHR unit.