The invention relates to biphenyl-4-carbonitrile of formula (I), which is produced by reacting biphenyl with cyanogen chloride in the presence of anhydrous aluminum chloride. The method provides good yields of the desired product and without forming isomeric or polycyanided byproducts. Biphenyl-4-carbonitrile is an important intermediate product, for instance, for the synthesis of pharmaceutical active substances.
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