申请人:Ciba-Geigy Corporation
公开号:US04405778A1
公开(公告)日:1983-09-20
The invention relates to O-substituted 7.beta.-amino-3-cephem-3-ol-4-carboxylic acid compounds of the formula ##STR1## wherein R.sub.1.sup.a represents hydrogen or an amino protective group R.sub.1.sup.A and R.sub.1.sup.b represents hydrogen or an acyl group Ac, or R.sub.1.sup.a and R.sub.1.sup.b together represent a bivalent amino protective group, R.sub.2 represents hydroxyl or a radical R.sub.2.sup.A which together with the carbonyl grouping --C(.dbd.O)-- forms a protected carboxyl group and R.sub.3 represents an optionally substituted hydrocarbon radical or an acyl group, and to 1-oxides of 3-cephem compounds of the formula I, and also to the corresponding 2-cephem compounds of the formula ##STR2## wherein R.sub.1.sup.a, R.sub.1.sup.b, R.sub.2 and R.sub.3 have the abovementioned meanings, or salts of such compounds with salt-forming groups. 3-Cephem compound of the formula IA, particularly those, in which R.sub.1.sup.a represents an acyl group, R.sub.1.sup.b is hydrogen and R.sub.2 is hydroxy exhibit pronounced antimicrobial effects, the others, and particularly the 1-oxides of these 3-cephem compounds and the corresponding 2-cephem compounds are useful as intermediates.
该发明涉及以下结构的O-取代7-β-氨基-3-头孢烯-3-醇-4-羧酸化合物的化学式:其中R₁ᵃ代表氢或氨基保护基R₁ᴬ,R₁ᵇ代表氢或酰基Ac,或R₁ᵃ和R₁ᵇ共同代表二价氨基保护基,R₂代表羟基或与羰基团--C(.dbd.O)--一起形成保护羧基的基团R₂ᴬ,R₃代表可选择取代的烃基或酰基,以及化学式I的3-头孢烯化合物的1-氧化物,以及化学式的相应2-头孢烯化合物:其中R₁ᵃ、R₁ᵇ、R₂和R₃具有上述含义,或具有盐基团的上述化合物的盐。特别是具有R₁ᵃ代表酰基,R₁ᵇ为氢和R₂为羟基的3-头孢烯化合物IA表现出显著的抗微生物作用,其他化合物,尤其是这些3-头孢烯化合物的1-氧化物和相应的2-头孢烯化合物可用作中间体。