申请人:Hoechst UK Limited
公开号:US04849419A1
公开(公告)日:1989-07-18
A compound of formula I ##STR1## with R.sup.1 being an alkyl group substituted by one or more substituents and esters thereof at the 2-carboxy group or at the 8-hydroxy group or both; and salts thereof. Compounds I have antibacterial effect. Various intermediates are described. This compound of the formula I, or an ester at the 2-carboxy group or at the 8-hydroxy group or both or a salt thereof is produced by reacting a compound of formula II or of formula IX ##STR2## in which R represents a hydrogen atom or a carboxy protecting group, R.sup.3 represents an activated carboxylic acid group, R.sup.4 represents an alkyl group having 1 to 4 carbon atoms, or a phenyl group which may be unsubstituted or substituted, R.sup.15 represents a phenyl group or an alkyl group having from 1 to 4 carbon atoms, and X represents an oxygen or sulphur with an amine of the formula III R.sup.1 NH.sub.2 (III) to give a compound of formula I, or an ester thereof of formula Ia ##STR3##
公式I的化合物##STR1##,其中R.sup.1是一个烷基基团,该基团在2-羧基或8-羟基或两者处被一个或多个取代基取代,以及它们的酯类;及其盐。化合物I具有抗菌作用。描述了各种中间体。通过将公式II或公式IX的化合物##STR2##(其中R代表氢原子或羧保护基团,R.sup.3代表活化羧基团,R.sup.4代表具有1至4个碳原子的烷基基团,或者可能是未取代或取代的苯基,R.sup.15代表苯基或具有1至4个碳原子的烷基基团,X代表氧或硫)与公式III的胺R.sup.1 NH.sub.2(III)反应,从而制备公式I的化合物,或其在2-羧基或8-羟基或两者处的酯类或其盐。