申请人:Sankyo Company Limited
公开号:US04247548A1
公开(公告)日:1981-01-27
7.alpha.-Methoxycephalosporin derivatives of general formula (I): ##STR1## wherein: R.sup.1 represents a hydroxy group; a C.sub.1 -C.sub.4 alkoxy group; a C.sub.2 -C.sub.5 aliphatic acyloxy group; a benzoyloxy group which is unsubstituted or has one or more C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, nitro or halogen substituents; a benzenesulphonyloxy group which is unsubstituted or has one or more C.sub.1 -C.sub.4 alkyl substituents; or a C.sub.1 -C.sub.3 alkanesulphonyloxy group which is unsubstituted or has one or more C.sub.1 -C.sub.3 alkoxy, cyano, nitro, halogen or C.sub.2 -C.sub.4 alkoxycarbonyl substituents; R.sup.2 represents a hydrogen atom, a C.sub.1 -C.sub.4 alkyl group, a halogen atom, a carboxyl group, a C.sub.2 -C.sub.5 alkoxycarbonyl group, a carbamoyl group, an alkylcarbamoyl group in which the alkyl moiety has from 1 to 3 carbon atoms, a di(C.sub.1 -C.sub.3 alkyl)carbamoyl group or a cyano group; R.sup.3 represents a hydrogen atom; an acetoxy group; a carbamoyloxy group; or a tetrazolylthio, thiadiazolylthio or oxadiazolylthio group which is unsubstituted or has one or more C.sub.1 -C.sub.3 alkyl, sulphomethyl or di(C.sub.1 or C.sub.2 alkyl)amino(C.sub.1 -C.sub.3 alkyl) substituents; m is 0 or 1; and n is 0 or 2 exhibit potent antibacterial activity and are thus useful as medicines. The derivatives can be prepared by reacting the corresponding 7.alpha.-methoxycephalosporin derivative having an amino group at the 7.beta.-position with an acid halide corresponding to the substituted acetyl group which it is desired to attach to the amino group at the 7.beta.-position or by reacting Cephamycin C with the same acid halide.
7.alpha.-甲氧基头孢菌素衍生物的一般式(I):##STR1## 其中:R.sup.1代表羟基;C.sub.1-C.sub.4烷氧基;C.sub.2-C.sub.5脂肪酰氧基;苯甲酰氧基,未取代或具有一个或多个C.sub.1-C.sub.4烷基,C.sub.1-C.sub.4烷氧基,硝基或卤素取代基;苯磺酰氧基,未取代或具有一个或多个C.sub.1-C.sub.4烷基取代基;或C.sub.1-C.sub.3烷基磺酰氧基,未取代或具有一个或多个C.sub.1-C.sub.3烷氧基,氰基,硝基,卤素或C.sub.2-C.sub.4烷氧羰基取代基;R.sup.2代表氢原子,C.sub.1-C.sub.4烷基,卤素原子,羧基,C.sub.2-C.sub.5烷氧羰基,氨基甲酰基,烷基氨基甲酰基,其中烷基部分具有1至3个碳原子,二(C.sub.1-C.sub.3烷基)氨基甲酰基或氰基;R.sup.3代表氢原子;乙酰氧基;氨基甲酰氧基;或未取代或具有一个或多个C.sub.1-C.sub.3烷基,磺甲基或二(C.sub.1或C.sub.2烷基)氨基(C.sub.1-C.sub.3烷基)取代基的四唑硫基,噻二唑硫基或噁二唑硫基;m为0或1;n为0或2。这些衍生物具有强效的抗菌活性,因此可用作药物。可以通过将在7.beta.-位置具有氨基的相应7.alpha.-甲氧基头孢菌素衍生物与所需附加到7.beta.-位置氨基的取代乙酰基对应的酸卤反应,或通过将头霉素C与相同的酸卤反应来制备这些衍生物。