Synthesis of 4,4′-Bis(aminomethyl) Biphenyl Hydrochloride and Its Derivatives

4,4′-bis(aminomethyl) biphenyl hydrochloride was prepared from biphenyl by aminomethylation and hydrolysis.The yield of 4,4′-bis(chloromethyl) biphenyl hydrochloride based on biphenyl could reach as high as 80.7% under the optimum reaction conditions.At the same time,three kinds of derivatives,i.e.4,4′-biphenyldicarboxaldehyde,4,4′-bis(hydroxymethyl)biphenyl and 4,4′-bis(chloromethyl) biphenyl were prepared from it.