Addition reactions continued alkenylation

Peterson Alkenylation. The Peterson alkenylation reaction continues to be the major use of trimethylsilylmethyllithium (1) and converts a carbonyl group to a methylene (eq 1). Some enan-tioselectivity has been seen for the addition of 1 to benzaldehyde in the presence of chiral ligands. The ketone substrates can contain functional groups that are con5)atible with the basic conditions. The use of cerium(III) chloride to promote nucleophilic addition of 1 to an enolizable carbonyl compound has continued to prove advantageous. ... 

This review continues from one entitled The Chemistry of a,P-Unsaturated Sulfoxides which was recently published in a monograph of organosulfur chemistry. 1 In addition, the coverage has been extended to include the analogous a,P-unsaturated sulfones. The focus of the present review are recent advances in the chemistry of a,P-unsaturated sulfoxides and sulfones, especially those which have been published since 1993. The synthesis of a,P-unsaturated sulfoxides and sulfones has already been reviewed extensively by Rayner2 and hence will not be covered here. Only the chemistry of vinyl (alkenyl) sulfoxides and sulfones will be considered. The chemistry of other a,P-unsaturated sulfoxides and sulfones such as dienyl, allenyl, and propargyl (alkynyl) sulfoxides and sulfones is beyond the scope of this review. Considerable emphasis has been placed on stereo- and enantioselective reactions, reflecting the current interest in this area. 

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