Development of an Anomalous Heck Reaction: Skeletal Rearrangement of Divinyl and Enyne Carbinols
作者:J. Maina Ndungu、Kimberly K. Larson、Richmond Sarpong
DOI:10.1021/ol052382p
日期:2005.12.1
[reaction: see text] A general set of conditions that achieves the union of aryl halides and divinyl or enyne carbinols to afford tri- or tetrasubstituted olefins in good yields (up to 83%) is described. The mechanism by which this proceeds is believed to involve the intermediacy of a cyclopropanol, followed by a novel skeletal reorganization. The ability to suppress beta-hydride elimination of organopalladium
[反应:见正文] 描述了实现芳基卤化物与二乙烯基或烯炔醇结合以以良好产率(高达 83%)提供三取代或四取代烯烃的一组通用条件。据信,这一过程的机制涉及环丙醇的中介作用,然后是新的骨架重组。抑制有机钯中间体的β-氢化物消除的能力似乎对于这些过程的成功至关重要。