7β-Acylamino-3-trifluoromethylsulfonyloxy-1-carba-3-cephem-4-carboxylic acid antibitic compounds, esters and salts thereof, and the corresponding 7-amino and protected 7-amino 1-carbacephalosporins are provided. The 3-trifluoromethylsulfonyloxy-substituted 1-carbacephalosporins also are useful in a process for preparing 3-halo-1-carbacephalosporins which comprises displacing the 3-trifluoromethylsulfonyloxy ester group with halide ion in an aprotic polar solvent.
提供了7β-乙酰
氨基-3-三
氟甲基磺酰氧基-1-羧基-3-头孢-4-
羧酸抗化合物、其酯和盐,以及相应的7-
氨基和保护的7-
氨基1-头孢烷。3- 三
氟甲基磺酰氧基取代的 1-碳
头孢菌素还可用于制备 3-卤代-1-碳
头孢菌素的工艺中,该工艺包括在钝极性溶剂中用卤离子置换 3-三
氟甲基磺酰氧基酯基。