INTRODUCTION OF DIFFERENT GROUPS TO ALPHA-POSITION AND BETA-POSITION OF CYCLIC ALPHA,BETA-UNSATURATED KETONES VIA [2-PI-PI]-PHOTOCYCLOADDITION WITH KETENE SILYL ACETALS FOLLOWED BY ELECTRODE-REACTION(2)

The photoadducts of cyclic conjugated enones with ketene silyl acetals and silyl enol ether were subjected to electrolysis to bring about th e oxidative cleavage of the Si-O bond, which induced the collapse of t he cyclobutane ring to perform the introduction of the different group s to both positions of the ene moieties of the enones.