The first dimesitylboryl substitution of aryl halides with a silylborane bearing a dimesitylboryl group in the presence of alkali‐metal alkoxides is described. The reactions of aryl bromides or iodides with Ph2MeSi−BMes2 and Na(OtBu) afforded the desired aryl dimesitylboranes in good to high yields and with high borylation/silylation ratios. Selective reaction of the sterically less‐hindered C−Br bond
                                    描述了在碱
金属醇盐的存在下,用带有一个二甲磺基的甲
硅烷基
硼烷对芳基卤进行的第一个二甲磺基取代。芳基
溴化物或
碘化物与Ph 2 MeSi-BMes 2和Na(O t Bu)的反应以高至高收率和高
硼化/甲
硅烷基化比提供了所需的芳基二聚三聚
戊二烯。二
溴芳烃在空间上受阻较小的C-Br键的选择性反应提供了单
硼化产物。该反应用于快速构建具有不对称
联苯间隔基的D-π-A芳基二甲
硅烷基
硼烷。