申请人:Sankyo Company Limited
公开号:US04639441A1
公开(公告)日:1987-01-27
Compounds of formula (I): ##STR1## in which: R.sup.1 represents a hydrogen atom, an alkyl group, an alkoxy group or various substituted alkyl groups; R.sup.2 represents a hydrogen atom, a group of formula ##STR2## (in which R.sup.5 and R.sup.6 each represents an alkyl group, an aralkyl group or an aryl group, or R.sup.5 and R.sup.6 together represent a nitrogen-containing heterocyclic group) or a group of formula ##STR3## (in which R.sup.7 represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted amino group, a cyclic amino group, a hydroxy group, an alkoxy group, an aryloxy group, an aralkyloxy group, a substituted or unsubstituted hydrazino group or a guanidino group, and A' represents a bivalent saturated aliphatic hydrocarbon group); and R.sup.3 represents a carboxy group or a protected carboxy group; and pharmaceutically acceptable salts thereof are valuable antibiotics and may be prepared from the corresponding 1-(protected carboxymethyl)-4-alkylthio-azetidin-2-one.
公式(I)的化合物:##STR1## 其中:R.sup.1代表氢原子、烷基团、烷氧基团或各种取代烷基团;R.sup.2代表氢原子、公式##STR2##的团(其中R.sup.5和R.sup.6各自代表烷基团、芳烷基团或芳基团,或者R.sup.5和R.sup.6共同代表含氮杂环团)或公式##STR3##的团(其中R.sup.7代表氢原子、取代或不取代的烷基团、取代或不取代的氨基团、环状氨基团、羟基、烷氧基团、芳氧基团、芳烷氧基团、取代或不取代的肼基团或胍基团,A'代表二价饱和脂肪烃基团);以及R.sup.3代表羧基或保护的羧基;且其药理可接受的盐是有价值的抗生素,可以由相应的1-(保护羧甲基)-4-烷基硫基-azetidin-2-酮制备。