Electrochemical oxidation of 1,3-diketones in the presence of olefins afforded the formal [3+2] cycloaddition products, dihydrofuran derivatives or tetrahydrofuran derivatives. A mechanism involving attack of a radical intermediate to an olefin has been proposed.
Electrochemical oxidation of 1,3-diketones in the presence of olefins under an atmosphere of oxygen gave the formal [2+2+2] cycloadducts, i.e. cyclicperoxides. A catalytic amount of electricity was sufficient for the reaction and an electro-initiated radical chain mechanism was suggested.