An interesting isomerization: synthesis of mesoionic 5-arylamino-1,3,4-thiadiazolium-2-thiolates by using w-bromo-w-(1H-1,2,4-triazol-1-yl) acetophenone as catalyst;

Chang-Hu Chu, Xin-Ping Hui, Peng-Fei Xu, Zi-Yi Zhang, Zhi-Chun Li and Ren-An Liao.

J. Chin. Chem. Soc., 2000, 47(4), 943 (Taipei).