W. Yue
2000
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Journal
Fine chemicals
Abstract
Dibromotoluene(Ⅰ) reacted with magnesium and trimethylchlorosilane(TMSCl) in THF where the molar ratio was n(Ⅱ)∶n(Mg)∶n(TMSCl)=4 5∶4 9∶6 9 to afford 5 methyl 3 bromo trimethylsilyl benzene(Ⅱ) in 85% yield.5,5′ Dimethyl 3,3′ bis(trimethylsilyl)biphenyl(Ⅲ) was synthesized in 78% yield by the ligandless nickel chloride (NiCl\-2) (5%) catalyzed cross coupling reaction of aryl Grignard reagent,prepared from Ⅱ and magnsium[n(Ⅱ)∶n(Mg)=6 5∶6 6] in THF,with equimolecular Ⅱ.