申请人:Lovens Kemiske Fabrik Produktionsaktieselskab
公开号:US03951957A1
公开(公告)日:1976-04-20
New penicillin esters and their salts together with methods for, and intermediates in the preparation thereof, the esters having the formula: ##EQU1## in which formula the asterisk indicates the possibility of an asymmetric carbon atom, n indicates an integer from 0 to 5, R.sup.1 represents a group, which together with --CO-- forms the side chain of any of the known semisynthetic, biosynthetic, and natural penicillins; R.sup.2 has any of the following meanings: hydrogen, an aliphatic, an aromatic, a heterocyclic group, and an aromatically substituted aliphatic group; each of R.sup.3, R.sup.4, and R.sup.5 represents hydrogen, or a lower aliphatic group with the provision that R.sup.2 and R.sup.5 together with the carbon atom between them can form a 5-, 6-, or 7-membered carbocyclic ring, and either R.sup.3 and R.sup.4, or R.sup.4 and R.sup.5 together with the nitrogen atom can form a ring system.
新青霉素酯及其盐,以及其制备方法和中间体,该酯的化学式为:##EQU1## 公式中的星号表示可能存在一个不对称的碳原子,n表示从0到5的整数,R.sup.1表示一个基团,它与--CO--一起形成已知的半合成、生物合成和天然青霉素的侧链;R.sup.2具有以下任一含义:氢、脂肪族、芳香族、杂环基团和芳基取代的脂肪族基团;R.sup.3、R.sup.4和R.sup.5中的每一个表示氢或较低的脂肪族基团,但R.sup.2和R.sup.5与它们之间的碳原子可以形成5、6或7成员的碳环,而且R.sup.3和R.sup.4或R.sup.4和R.sup.5与氮原子可以形成一个环系统。