Oxidative Dimerization of Silylallenes via Activation of the Allenic C(<i>sp</i><sup>2</sup>)–H Bond Catalyzed by Copper(I) Chloride and <i>N</i>-Hydroxyphthalimide
作者:Venkata R. Sabbasani、Daesung Lee
DOI:10.1021/acs.orglett.5b02433
日期:2015.10.2
Novel oxidative dimerization of silylallenes is described. Treatment of silylallenes with a catalytic amount of copper(I) chloride, a substoichiometric amount of N-hydroxyphthalamide, and a stoichiometric amount of a terminal oxidant diacetoxyiodobenzene afforded head-to-head dimers as the main products. Silyallenes containing a small ring afforded only dimers, whereas as the ring size increased 1
描述了甲硅烷基亚烷基的新型氧化二聚作用。用催化量的氯化铜(I),亚化学计量量的N-羟基邻苯二甲酰胺和化学计量量的末端氧化剂二乙酰氧基碘苯处理甲硅烷基烯以头对头二聚体为主要产物。含有小环的硅丙二烯只能提供二聚体,而随着环尺寸的增加,1,3-烯炔成为更有利的产物。对于含有无环取代基的甲硅烷基亚烷基而言,二聚体形成是常态,其中N-羟基邻苯二甲酰亚胺在炔丙基中心反应生成相应的氨氧基醚。