Synthesis and cascade reactions of diallenyl α-disulfones and sulfinyl sulfones

The synthesis and reactivity of diallenic α-disulfones and diallenic sulfinyl sulfones are described. Both types of compound exhibit enhanced reactivity relative to their saturated counterparts, and react spontaneously at low temperature, upon preparation, to yield novel and functionalized bicyclic products. Possible mechanisms for their multi-step rearrangements are suggested.