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Treatment of chlorobis(methyldiphenylsilyl)methyllithium with various alkyl and aryl Grignard reagents and CuCN·2LiCl afforded 1,1-disilylalkylcopper species. The aerobic oxidation of the resulting copper reagents provided a variety of acylsilanes in good yields. Meanwhile, treatment of dichloro(methyldiphenylsilyl)methyllithum with Bu 2 CuLi·LiCN provided 1-cyano-1-silylalkylcopper species...
Treatment of chlorobis(methyldiphenylsilyl)methyllithium with vinylic Grignard reagents and CuCN.2LiCl afforded α,α-bis(silyl)-substituted allylic copper species. The reactions of the reagents with electrophiles provided a variety of 1,1-disilylalkenes.
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