Synthesis of Distorted 1,8,13‐Trisilyl‐9‐hydroxytriptycenes by Triple Cycloaddition of Ynolates to 3‐Silylbenzynes
作者:Tatsuro Yoshinaga、Takumi Fujiwara、Takayuki Iwata、Mitsuru Shindo
DOI:10.1002/chem.201903024
日期:2019.11.4
13-Trialkyl(aryl)silyl-9-hydroxytriptycenes (trisilyltriptycenes) were synthesized by the triple addition of ynolates and 3-silylbenzynes with high regioselectivity. Benzene rings in the resulting triptycenes were highly distorted where the dihedral angles between the substituents were as high as 35°. The distortion energy induced step-by-step halogenation reactions to yield halogenated triptycenes, including chiral
通过以高的区域选择性三倍地添加ynolates和3-silylbenzyneses,合成了1,8,13-三烷基(芳基)甲硅烷基-9-羟基三萜烯(trisilyltriptycenes)。在取代基之间的二面角高达35°的情况下,所得三联体中的苯环高度扭曲。畸变能引起逐步的卤化反应,产生包括手性三萜的卤化三萜。然后将1,8,13-三卤化三联体转化为1,8,13-官能化的三联体。