申请人:Fujisawa Pharmaceutical Company, Ltd.
公开号:US05081237A1
公开(公告)日:1992-01-14
The invention relates to novel intermediate compounds for preparation of compounds of high antimicrobial activity, said intermediate compounds being of one of the formulas: ##STR1## wherein R.sup.1 is carboxy or protected carboxy, R.sup.2 is hydroxy(lower)alkyl or protected hyroxy(lower)alkyl, R.sup.3 and R.sup.4 are each hydrogen or lower alkyl, R.sup.5 is a saturated heterocyclic group, and R.sup.6 is aryl or lower alkoxy, or pharmaceutically acceptable salts thereof.
本发明涉及用于制备高抗微生物活性化合物的新型中间体化合物,所述中间体化合物为以下公式之一:##STR1## 其中R.sup.1是羧基或保护羧基,R.sup.2是羟基(较低)烷基或保护羟基(较低)烷基,R.sup.3和R.sup.4分别是氢或较低烷基,R.sup.5是饱和杂环基,R.sup.6是芳基或较低烷氧基,或其药学上可接受的盐。