synthetically useful formyl and cyanogroups is reported. These compounds have been obtained by multistep syntheses starting with simple halogenated benzenes. The general synthetic protocol was based on the generation ortho-boronated aryldimethylsilanes which undergo dehydrogenative cyclization upon hydrolytic workup due to the activation of the Si-H bond by the adjacent boronic group. In some cases the
报道了一系列带有合成有用的甲酰基和氰基的氟化苯并硅氧烷的合成和表征。这些化合物是通过从简单的卤代苯开始的多步合成获得的。一般的合成方案基于生成邻硼化芳基二甲基硅烷,由于相邻硼基团激活 Si-H 键,该硅烷在水解后发生脱氢环化。在某些情况下,相邻硼基和硅基官能团的协同作用导致 CHO 基团在温和的水性条件下发生意外的氢化硅烷化。在相对于硼原子的邻位带有甲酰基的苯并硅氧烷衍生物的还原导致结构转变,反映了碳硼杂环相对于其硅对应物的更高稳定性。因此,分离出一种独特的杂环系统,其特征在于包含两个硼硅氧烷键的中心 10 元环。