3-溴-4-(4-氯苯基)-4-氧丁酸 、
1,5-dimethyl-3,4,5,6-tetrahydro-s-triazin-2(1H)thione 在
异丙醇 作用下,
以
甲醇 、 solvent 为溶剂,
反应 2.0h,
以to give 7-carboxymethyl-6-(p-chlorophenyl)-1,3-dimethyl-6-hydroxy-3,4,6,7-tetrahydro-2H-thiazolo[3,2-a]-s-triazinium bromide as a colourless solid (6.0 g), m.p. 160°-161° C. (decomposition)的产率得到7-Carboxymethyl-6-(p-chlorophenyl)-1,3-dimethyl-6-hydroxy-3,4,6,7-tetrahydro-2H-thiazolo[3,2-a]-5-triazinium bromide