Summary: Electrochemical Transformation of epoxides & to ketones 1 and acetonides 2 were achieved by using an electrogenerated acid-catalyst. A combination of M (C104) n [M; Li, Na, Mg, n= 1, 2] with polar aprotic solvents [CH2C12, ClCH2CH2C1, THF, CH3COCH3, AcOEt,(MeO) 2CO] is useful for the electrochemical transformation.