Dihydrosilanes undergo double trans-hydrosilylation with 1,4-diarylbuta-1,3-diynes in the presence of a cationic ruthenium catalyst to afford 2,5-diarylsiloles: in particular, 9-silafluorene is a good hydrosilylating agent to produce spiro-type siloles in good yield.
二氢
硅烷在阳离子
钌催化剂的存在下与1,4-二芳基丁-1,3-二炔发生双转式氢
硅化反应,生成2,5-二芳基
硅烯;尤其是,9-
硅氟烯是一个良好的氢
硅化试剂,可以高产率地生成螺旋型
硅烯。