Nickel-catalyzed heterocycle construction with stereoselective exocyclic alkene introduction
作者:John Montgomery、Maxim V. Chevliakov、Harry L. Brielmann
DOI:10.1016/s0040-4020(97)01027-2
日期:1997.12
A series of monocyclic and bicyclic heterocycles with exocyclic alkenes were constructed in a stereoselective fashion by an organozinc/Ni(COD)2 - mediated cyclization of alkynyl enones. Both reductive and alkylative cyclization manifolds were accessible depending on the ligand and organozinc structure. Alkylative cyclizations were generally more efficient than reductive cyclizations, particularly with
通过有机锌/ Ni(COD)2介导的炔基烯酮的环化反应,以立体选择的方式构建了一系列带有环外烯烃的单环和双环杂环。取决于配体和有机锌的结构,还原性和烷基化的环化歧管都是可及的。烷基化环化通常比还原环化更有效,特别是对于环状底物。