Oxidation of cis-3,5-di-tert-alkyl-3,5-diphenyl-1,2,4-trithiolanes: isolation and some properties of the 1-oxides and the 1,2-dioxides

Oxidation of cis-3,5-di-tert-alkyl-3,5-diphenyl-1,2,4-trithiolane with an excess amount of dimethyldioxirane gave the 1,2-dioxide, a vic-disulfoxide, and it was verified that the 1,2-dioxide was formed specifically from one of two stereoisomeric monoxides. The structures of the monoxides and the 1,2-dioxide were determined by X-ray crystallography.