Liu Zhi-xiong
2008
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Journal
Chemistry World
Abstract
The synthesis of biphenyl-4,4′-dicarboxylic acid was studied. Using 4-nitrotoluene as raw material, the biphenyl-4,4-dicarboxylic acid was synthesized through oxidation, reduction and diazotization-coupling reaction. The influence of NaNO_2 which was added in the diazotization reaction was studied emphatically. The overall yield was 66.6% and the purity of biphenyl-4,4′-dicarboxylic acid was 98.7%.