Formation of an Unusual Product in the Reaction of a 1,2,5-Thiadiazolidine 1,1-Dioxide-Derived Thioether with Sulfuryl Chloride

The treatment of a 1,2,5-thiadiazolidine 1,1-dioxide-derived phenylthiomethyl ether with sulfuryl chloride yielded an unexpected dimeric product whose structure was determined using X-ray crystallography. A plausible mechanism for the formation of this product is proposed. J. Heterocyclic Chem. (2009).