6,7-dihydro-7-<2-(3-ethyl-2(3H)-benzothiazolylidene)ethylidene>-6-oxo-4-phenyl-5H-thiazolo<4,3,2-d,e>thiazolo<3,4-a>pyrimidinium perchlorate 在
三乙胺 作用下,
以
乙醇 为溶剂,
以71%的产率得到7-<2-(3-ethyl-2(3H)-benzothiazolylidene)ethylidene>-4-phenyl-7H-thiazolo<4,3,2-d,e>thiazolo<3,4-a>pyrimidinium 6-oxide