Enethiolates derived from dithioesters were efficiently converted into the corresponding vinyl sulfenates by oxidation with a unique N-sulfonyloxaziridine la derived from pinacolone. Subsequent alkylation with alkyl halides led to ketene dithioacetal S-oxides in good to excellent yields.
BESLIN, P.;VALLEE, Y., TETRAHEDRON, 1985, 41, N 13, 2691-2705