Oxidation of aromatic amines to symmetrical substituted azobenzenes under phase-transfer catalysis with Galvinoxyl/K~3Fe(CN)~6/KOH system
Wang Yulu;Wang Cailan;Li Jianping;Wang Hong;Zhang Ziyi;Wang Xiaoyang
Acta Chimica Sinica . 1999, (11): 1277 -1282 .