Compounds of general formula (I)
(where R' is a carboxyl group, a group COO⊖ or a blocked carboxyl group;
R2 is an amino or protected amino group; and
R is hydrogen or a group of the formula CH2X, where X represents a halogen atom, a hydroxyl group, an acetoxy group; a group of the formula O.CO.NHR3, where R3 is hydrogen, a C1-4 alkyl group optionally substituted by 1 to 3 halogen atoms or an N-protecting group; a group of the formula OR4, where R" is a C1-4 alkyl group optionally substituted by halogen or a C1-4 alkoxy group; or a pyridinium, 3-carbamoylpyridinium or 4-carbamoyl-pyridinium group;
B is -S- or -SO- (a- or β-); and the dotted line bridging the 2-, 3- and 4- positions indicates that the compound is a ceph-2-em or ceph-3-em compound) and salts thereof, the compounds of formula (I) being associated with an anion when X represents a pyridinium, 3-carbamoylpyridinium group or a 4-carbamoylpyridinium group and R' is other than COO⊖) are disclosed.
Processes for their preparation and pharmaceutical compositions containing them are also disclosed.
通式(I)化合物
(其中 R' 是羧基、COO⊖ 基团或封端羧基);
R2 是
氨基或受保护的
氨基;以及
R 是氢或式 CH2X 的基团,其中 X 代表卤素原子、羟基、乙酰氧基;式 O.CO.NHR3 的基团,其中 R3 是氢、任选被 1 至 3 个卤素原子或 N 保护基取代的 C1-4 烷基;式 OR4 的基团,其中 R" 是任选被卤素或 C1-4 烷氧基取代的 C1-4 烷基;或
吡啶鎓、3-
氨基甲酰基
吡啶鎓或 4-
氨基甲酰基
吡啶鎓基团;
B是-S-或-SO-(a-或β-);连接2-、3-和4-位的虚线表示该化合物是头孢-2-em或头孢-3-em化合物)及其盐,当X代表
吡啶鎓、3-
氨基甲酰基
吡啶鎓基团或4-
氨基甲酰基
吡啶鎓基团且R'不是COO⊖时,式(I)化合物与阴离子相连。
还公开了制备它们的工艺和含有它们的药物组合物。