Asymmetric oxidation of a,P-unsaturated sulfides

There are many methods available for the nonstereoselective oxidation of sulfides to the corresponding sulfoxides, and this transformation can now be considered in most cases to be trivial [2]. More recently, the development of methodology for the asymmetric oxidation of sulfides to sulfoxides has been the subject of considerable effort by many research groups around the world as the use of nonracemic sulfoxides in asymmetric synthesis has assumed growing importance. The 

Method B Ti(OPr)4, (-)-diethyl tartrate, HaO, PhCM OOH, CHaCIa, -20 C Method C (-)-a,a-dichlorocamphoibenzene8ulphonyfoxaziridine, CCI4 

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