Tandem Intramolecular Carbolithiation-Lithium/Zinc Transmetallation and Applications to Carbon−Carbon Bond-Forming Reactions
作者:Miguel Yus、Rosa Ortiz
DOI:10.1002/ejoc.200400349
日期:2004.9
Lithium/zinc transmetallation with the cyclic organolithium intermediate 3 (prepared by intramolecular carbolithiation of the initially formed organolithium 2) gives the corresponding organozinc intermediate 5. Copper- or palladium-promoted SN2′ reactions between compound 5 and allylic or propargylic halides, as well as arylation, vinylation, benzylation, acylation, and conjugate addition to α,β-unsaturated
锂/锌与环状有机锂中间体 3(通过最初形成的有机锂 2 的分子内碳化反应制备)得到相应的有机锌中间体 5。铜或钯促进的化合物 5 与烯丙基或炔丙基卤化物之间的 SN2' 反应,以及芳基化、乙烯基化、苄基化、酰化和对 α,β-不饱和羰基化合物的共轭加成,提供(水解后)预期的化合物 7-15,即使在过渡金属催化下也不能直接从有机锂前体 3 中获得。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)