4-Amino-benzoic acid 6-[4-(4-cyano-phenylazo)-phenoxy]-hexyl ester 、
4-{4-[11-(4-Formyl-phenoxy)-undecyloxy]-phenylazo}-benzonitrile 在
对甲苯磺酸 作用下,
以
甲苯 为溶剂,
生成 4-[(4-{11-[4-(4-cyanophenylazo)phenoxy]undecyloxy}benzylidene)amino]benzoic acid 6-[4-(4-cyanophenylazo)phenoxy]hexyl ester