A Catalytic S<sub>E</sub>Ar Approach to Dibenzosiloles Functionalized at Both Benzene Cores
作者:Lukas Omann、Martin Oestreich
DOI:10.1002/anie.201504066
日期:2015.8.24
functionalized at one or both benzene rings starting from readily available ortho‐silylated biphenyls is reported. This method provides rapid access to silole building blocks substituted with chlorine atoms at both phenylene groups, thereby allowing catalytic access to directly polymerizable dibenzosiloles. Moreover, it is shown that, despite the involvement of highly electrophilic intermediates, a considerable
报道了从容易获得的邻甲硅烷基化联苯开始催化制备在一个或两个苯环上官能化的二苯并甲硅烷的一般程序。该方法可快速进入两个亚苯基上均被氯原子取代的甲硅烷基结构单元,从而允许催化进入可直接聚合的二苯并甲硅烷基。此外,研究表明,尽管涉及高度亲电的中间体,但仍可耐受相当大范围的路易斯碱,例如含氧和氮的官能团。这种分子内的电芳族取代(S机制ë AR)通过硫稳定硅阳离子,从氢硅烷前体的催化产生的前进。