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A NEW METHOD FOR THE SYNTHESIS OF 4 BROMO 4′ CYANOBIPHENYL

Liu Qianfeng, Zheng Yuanyang, An Zhongwei, Chen Juan (Applied Chemistry Department Xi′an Modern Chemical Research Institute, Xi′an 710065)  
A new method for the synthesis 4 bromo 4′ cyanobiphenyl is described 4 brombiphenyl is got from aniline through bromination.Coupling reactions which can be acetylized,oxided,chlorided,ammonified and dehybrated to prepare the title compound, and 4 bromo 4′ cyanobiphenyl can be used to prepare liquid crystal compound.
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