Abstract
Through the oxidation of sulfides useful elements of stereocontrol in asymmetric synthesis and important targets of pharmaceutical interest can be obtained. A number of metal-free methods have been developed over recent years for sulfoxidation reactions. The results published after 1998 through the beginning of 2010 have been reviewed with a focus being placed on sulfoxidations with hypervalent iodine compounds; iminium- and oxaziridinium derivatives; organic hydroperoxides and organocatalysts. In addition, autocatalytic and catalyst-free variants are discussed. Although, the asymmetric organocatalytic sulfoxidation is still in its infancy, the reported results show the high potential and versatility of this metal-free methodology.
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