Cobalt(I)-Mediated Preparation of Polyborylated Cyclohexadienes: Scope, Limitations, and Mechanistic Insight
作者:Anaïs Geny、David Lebœuf、Gabriel Rouquié、K. Peter C. Vollhardt、Max Malacria、Vincent Gandon、Corinne Aubert
DOI:10.1002/chem.200700337
日期:2007.6.25
proper choice of substituents allowed the preparation of 1,3-diborylated cyclohexadienes in a highly selective manner. Alternatively, 1,4-diborylated cyclohexadienes could be prepared from diborylated diynes. The scope of this reaction has been examined and found to include electron-poor, electron-rich, linear, and cyclic alkenes. The diborylated cyclohexadienes were submitted to single or double Suzuki-Miyaura
通过分子间CoCp介导的炔基硼酸松果酸酯与烯烃的分子间CoCp介导的[2 + 2 + 2]共环化,然后用铁进行氧化脱金属,制备了一系列1,3-和1,4-二硼基-1,3-环己二烯)氯化物。已经研究了在硼化炔烃上的取代对化学和区域选择性的影响,表明了空间控制。取代基的适当选择允许以高度选择性的方式的1,3-环己二烯diborylated制备。备选地,可以由二硼化的二炔制备1,4-二硼化的环己二烯。已经检查了该反应的范围,发现该反应的范围包括贫电子,富电子,直链和环状烯烃。将二硼化的环己二烯与卤代芳烃进行单或双Suzuki-Miyaura交叉偶联反应,得到聚芳基化体系。