Abstract
Synthetic reactions with organometallic reagents providing synthons of carbenes, allylic ions, and enolates are reviewed. Topics included are copper-carbene complexes, ring-enlargement with lithium carbenoids, double alkylation of cyclopropane carbon, chromium carbenoids, allylchromium reagents, stereoselective carbonyl addition, vinyl-chromiums, sulfur-stabilized allylic and vinylic anions, combined acid-base attack of organoaluminium reagents, controlling the fate of allylic cations, pi-allyl palladium mediated cyclization, vinyl cation synthons, Reformatsky reaction in the presence of diethyl-aluminium chloride, Al-Sn reagents, reduction of diiodomethane, carbonyl methylenation reaction, etc.
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