transformations gave access to other derivatives, including two liquid-crystalline compounds, in which o-carborane is a linear structural element. Regioselectivity of substitution on the carborane cage and on the benzene ring correlates with the inductive effect parameter of the substituent. The preparation of analogous derivatives of m-carborane was also investigated.
可以方便地以实用规模方便地获得两种异构体纯的邻-甲碳烷的1,12-双官能化衍
生物12-
碘-
1-乙烯基(1b)和12-
碘-1-苯基(1c),产率为22%和32通过分别使相应的邻-碳
硼烷衍
生物(4b和4c)单
碘化,然后通过结晶(1b)和色谱法(1c)分离区域异构体,来分别得到%。随后的官能团转化,得到访问其它衍
生物,其中包括两个液晶化合物,其中ö-碳
硼烷是线性结构元素。在碳
硼烷笼上和在苯环上的取代的区域选择性与取代基的感应效应参数相关。的类似衍
生物的制备米-carborane也进行了研究。