申请人:Richter Gedeon Vegyeszeti Gyar RT
公开号:US04587049A1
公开(公告)日:1986-05-06
The invention relates to compounds of the general formula (X) ##STR1## wherein R is as a removable protecting substituent of the amido group a phenyl group or a benzyl group substituted by one or more alkoxy group(s) having 1-4 carbon atoms and R.sup.1 stands for a hydrogen atom or an alkyl group having 1-4 carbon atoms and a process for the preparation thereof. The compounds of the general formula (X) can be prepared from the starting materials of the general formula (V), wherein R and R.sup.1 are as stated above and Z is an alkyl group having 1-4 carbon atoms. The compounds of the general formula (X) are useful pharmaceutical intermediates which can be used in the preparation of known antibiotics (e.g. Thienamycin and PS-5).
本发明涉及一般式(X)的化合物##STR1##其中,R作为可去保护基的取代苯基或取代苄基,取代一个或多个具有1-4个碳原子的烷氧基,R.sup.1代表氢原子或具有1-4个碳原子的烷基基团,以及其制备方法。一般式(X)的化合物可从一般式(V)的起始材料制备而来,其中R和R.sup.1如上所述,Z是具有1-4个碳原子的烷基。一般式(X)的化合物是有用的药物中间体,可用于已知抗生素(例如Thienamycin和PS-5)的制备。