- Reaction of trialkyl(dibromomethyl)silanes or 1,2-bis(dibromomethyl)benzene with triorganomanganates. A facile and selective synthesis of alkenylsilanes and 1,2-diaryl-1,2-dihydrobenzocyclobutenes
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Treatment of trialkyl(dibromomethyl)silanes with trialkylmanganates, derived from manganese(II) chloride and three molar amounts of Grignard reagents or alkyllithiums, provided (E)-1-trialkylsilyl-1-alkenes with high stereoselectivity in good yields. The reaction of trialkyl(dibromomethyl)silanes with alkylmagnesium halides proceeded in the presence of a catalytic amount of manganese(II) chloride. Treatment of 1,2-bis(dibromomethyl)benzene with triphenylmanganate gave 1,2-diphenyl-1,2-dihydrobenzocyclobutene.
- Kakiya,Shinokubo,Oshima
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p. 2139 - 2147
(2007/10/03)
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