Synthesis of γ-hydroxy-γ-perfluoroalkyl butenolides and exocyclic double bond butanolides via regioselective allylic alkylations of MBH carbonates with 2-perfluoroalkyl-oxazol-5(2H)-ones

Two series of γ-perfluoromethyl hemiketals were obtained by regiodivergent synthesis of α-selective and γ-selective allylic alkylation products. The enantioselective regiodivergent synthesis of allylic alkylation products was preliminarily realized.