ethyl (1Z)-8-[(3-ethoxy-3-oxopropyl)thio]-5-methyl-1-{[(4-methylphenyl)sulfonyl]imino}-3-oxo-2,3-dihydro-1H-imidazo[5,1-c][1,4]thiazine-6-carboxylate 在
乙醇 、
sodium methylate 作用下,
以
四氢呋喃 为溶剂,
以99%的产率得到ethyl (1Z)-8-mercapto-5-methyl-1-{[(4-methylphenyl)sulfonyl]imino}-3-oxo-2,3-dihydro-1H-imidazo[5,1-c][1,4]thiazine-6-carboxylate