Synthesis of cyclic β-silylenones via oxidative rearrangement of tertiary α-hydroxy allylsilanes with PCC

An oxidative rearrangement of cyclic tertiary α-hydroxy allylsilanes has been carried out in refluxing ClCH2CH2Cl with pyridinium chlorochromate (PCC). The reaction provides a convenient method to synthesize cyclic β-silylenones in modest to excellent yields.