Homoallylic substitution reactions of lithium dialkyl cuprates with cyclopropylcarbinyl halides: mechanistic considerations
作者:Robert T. Hrubiec、Michael B. Smith
DOI:10.1016/s0040-4020(01)91792-2
日期:1984.1
kanes, , react to give good yields of the homoallylic substitution product, . Less reactive organocuprates react with to give mixtures of and the direct substitution product, . These results are consistent with a copper(I) radical intermediate which undergoes facile rearrangement prior to reductive coupling.
高反应性的二烷基锂碳酸铜烷基酯和1-溴-1-环丙基丙基烷烃发生反应,可得到高收率的均烯丙基取代产物。反应性较低的有机铜酸酯与之反应生成的混合物,直接取代产物。这些结果与铜(I)自由基中间体一致,该中间体在还原偶联之前经历了容易的重排。