Stereochemical aspects of intramolecular palladium catalysed [3+2] cycloadditions of methylenecyclopropanes
作者:Hervé Corlay、William B Motherwell、Andrew M.K Pennell、Michael Shipman、Alexandra M.Z Slawin、David J Williams、Paul Binger、Michael Stepp
DOI:10.1016/0040-4020(96)00160-3
日期:1996.3
The preparation and intramolecular palladium catalysed [3+2] cycloaddition reactions of a range of substrates containing either stereochemically defined 2,3-disubstituted methylenecyclopropanes 3 or acrylate acceptors 12–15 are described. Evidence is presented which supports the hypothesis that these cycloaddition reactions proceed via palladium-trimethylenemethane type intermediates and that the two
描述了一系列包含立体化学定义的2,3-二取代的亚甲基环丙烷3或丙烯酸酯受体12-15的底物的制备和分子内钯催化的[3 + 2]环加成反应。提出的证据支持以下假设:这些环加成反应通过钯-三亚甲基甲烷类中间体进行,并且两个碳-碳键以高度异步的方式形成。