1. For asymmetric oxidation of sulfides and dithioacetals, see: (a) Kagan, H. B. In Catalytic Asymmetric Synthesis, 2nd ed.; Ojima, I., Eds; Wiley-VCH: New York, 2000; chapter 6c;
2. (b) Bolm, C.; Muniz, K.; Hildebrand, J. P. In Comprehensive Asymmetric Catalysis; Jacobsen, E. N.; Pfaltz, A.; Yamamoto, H., Eds; Springer: Berlin, 1999; Vol. II, pp. 697–710.
3. Chiral sulfoxidation by biotransformation of organic sulfides
4. For highly enantioselective stoichiometric mono-oxidation of cyclic 1,3-dithioacetals (>80% ee), see: (a) Bortolini, O.; Furia, F. D.; Licini, G.; Modena, G.; Rossi, M. Tetrahedron Lett. 1986, 27, 6257–6260;
5. (j) Bulman Page, P. C.; Heer, J. P.; Bethell, D.; Collington, E. W.; Andrews, D. M. Tetrahedron Lett. 1994, 51, 9629–9632;