3-ethyl-2-methy-1,3-benzothiazol-3-ium perchlorate 、
7-formyl-3-phenyl-2-thia-5,12-diazatricyclo[6.3.1.04,12]dodeca-1(11),3,5,7,9-pentaene-11-carbonitrile 在
乙酸酐 作用下,
以64%的产率得到5-<2-(3-ethyl-2(3H)-benzothiazolylidene)ethylidene>-2-phenyl-8-cyano-5H-thiazolo<4',3',2':1,9,8>pyrimido<1,2-c>pyrimidinium perchlorate