Brook Rearrangement as Trigger for Carbene Generation: Synthesis of Stereodefined and Fully Substituted Cyclobutenes
作者:Fa-Guang Zhang、Ilan Marek
DOI:10.1021/jacs.7b04255
日期:2017.6.21
Through a sequence that can be performed in a single vessel, involving regio- and diastereoselective copper-catalyzed carbomagnesiation of cyclopropenes, reaction with acylsilanes, and addition of THF as cosolvent, Brook rearrangement can be triggered to furnish a wide range of cyclobutenes with exceptional diastereoselectivity. Accordingly, stereodefined and highly substituted cyclobutenes with contiguous
通过可以在单个容器中进行的序列,包括区域选择性和非对映选择性铜催化的环丙烯碳镁化、与酰基硅烷反应以及添加作为助溶剂的 THF,可以触发布鲁克重排以提供各种具有特殊非对映选择性的环丁烯. 因此,具有连续季碳中心的立体定义和高度取代的环丁烯可以容易且高产率地合成。新策略构成了布鲁克重排的前所未有的应用,其中涉及卡宾物种的中介。