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