Reactivity of chlorooxachalcogenuranes: Oxidation of sulfides to sulfoxides using chlorooxaselenuranes

The transformation of chloro between chlorooxachalcogenuranes 3 and chalcogenides 4 is described. The oxidative ability of chlorooxachalcogenuranes has been compared. Selenuranes 3a, b have been found to be good reagents for selective oxidation of sulfides to sulfoxides under mild conditions.