An easily prepared series of phenylindenyldihydridosilyl ruthenium complexes (2aâ2d) was obtained by reaction of tertiary silanes with the commercially-available [RuCl(3-phenylindenyl)(PPh3)2] (1). The [RuH2(3-phenylindenyl)(SiEt3)] (2a) complex was shown to be highly efficient (1.5 mol%) in the ortho-selective borylation of pyridyl substrates, with yields of up to 90%. A novel ruthenium(IV)-catalysed CâH activation borylation/functionalization reaction using a remarkably low catalyst loadings is described.
通过三种碳
硅烷与商业可得的[RuCl(3-苯基
茚)(PPh3)2] (1) 反应,获得了一系列易于制备的苯基
茚基二氢
硅烷铑复合物(2a-2d)。[RuH2(3-苯基
茚)(SiEt3)] (2a) 复合物在选择性 ortho
硼化
吡啶底物的反应中表现出高效(1.5 mol%),产率高达90%。描述了一种新颖的
铑(IV)催化的C-H活化
硼化/官能化反应,采用了显著低的催化剂用量。