Alkenyl sulphides and ketene S,S-dithioacetals as olefin components in the Paterno-Büchi reaction: a regioselective synthesis of oxetanes

Abstract
Under photolysis benzophenone reacts with alkenyl methyl sulphides to give 3-methylthiooxetanes regio- and stereo-selectively. Under the same conditions ketene S,S-dithioacetals polymerise.