申请人:Ciba-Geigy Corporation
公开号:US04255328A1
公开(公告)日:1981-03-10
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 hydrogen, lower alkyl or a hydroxyl protective group, and 1-oxides of 3-cephem compounds of the formula IA, and the corresponding 2-cephem compounds are prepared in that a compound of the formula ##STR2## wherein R.sub.1.sup.a, R.sub.1.sup.b and R.sub.2.sup.A have the meanings mentioned under formula IA, R.sub.3.sup.o represents lower alkyl or a hydroxyl protective group and Y represents a group which is removed, is treated with a base; also comprised are intermediate products.
公式为 ##STR1## 的7.beta.-氨基-3-头孢烯-3-醇-4-羧酸化合物,其中R.sub.1.sup.a代表氢或氨基保护基R.sub.1.sup.A,R.sub.1.sup.b代表氢或酰基Ac,或者R.sub.1.sup.a和R.sub.1.sup.b一起代表双价氨基保护基,R.sub.2代表羟基或与羰基团--C(.dbd.O)--一起形成保护羧基的基团R.sub.2.sup.A,R.sub.3代表氢、低碳基或羟基保护基,以及公式IA的3-头孢烯化合物的1-氧化物和相应的2-头孢烯化合物是通过将公式为 ##STR2## 的化合物,其中R.sub.1.sup.a、R.sub.1.sup.b和R.sub.2.sup.A具有公式IA中提到的含义,R.sub.3.sup.o代表低碳基或羟基保护基,Y代表被去除的基团,与碱处理制备而成;还包括中间产物。