Reductive Deconjugation ofα-Bromoα,β-Unsaturated Esters Based on Redox Tautomerism of Diethyl Phosphonate

Reductive deconjugation of α-bromo α,β-unsaturated esters was performed by DP(O)(OEt)2 or P(OEt)3–H2O in the presence of triethylamine from mechanistic viewpoint and was applied to the synthesis of a precursor of (±)-patulolide A.