Abstract
O -(Dihydrosilyl)(dimesitylboryl)benzenes 1 were prepared in 6 steps. o -Dibromobenzene was mono-lithiated with n -BuLi and reacted with chloro(dimethoxy)silanes to afford o -C 6 H 4 (Br)[SiR(OMe) 2 ] ( 2 ) (R = Ph, Me). Bromine–lithium exchange between 2 and tert -BuLi produced o -C 6 H 4 (Li)[SiR(OMe) 2 ] ( 3 ), which were reacted with fluoro(dimesityl)borane to give o -C 6 H 4 (BMes 2 )[SiR(OMe) 2 ] ( 4 ). Reduction of 4 with LiAlH 4 in THF yielded [ o -C 6 H 4 (BMes 2 H)(SiRH 2 )] − Li + (thf) n ( 9 ). Treatment of 9 with BF 3 ·OEt 2 afforded the target compounds 1 . The structures of 1 were determined by NMR spectroscopy and X-ray crystallographic analysis.
Published Version
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