申请人:Lucky Ltd.
公开号:US05567813A1
公开(公告)日:1996-10-22
The present invention provides a process for preparing cephem derivatives having the following general formula (I): ##STR1## in which R.sup.1 represents a carboxy group or a protected carboxy group which can form the salt of --COO.sup.- M.sup.+ with an alkali metal ion (M.sup.+) such as sodium, or may represent --COO.sup.- when R.sup.2 has a substituent having positive electric charge such as pyridinium, pyrimidinium or thiazolium, R.sup.2 represents hydrogen, acyloxymethyl, heterocyclic methyl or heterocyclic thiomethyl, each of which can be substituted with appropriate substituents, R.sup.3 represents hydrogen or an amino-protecting group, R.sup.4 represents C.sub.1 -C.sub.4 alkyl or phenyl, or together with the oxygen or phosphorus atom to which it is attached may form a 5- or 6-membered heterocyclic ring, and Q represents N or CH, characterized in that a reactive thiophosphate derivative of thia(dia)zole acetic acid having the following general formula (II): ##STR2## wherein R.sup.3, R.sup.4 and Q are defined as above is acylated with an 7-ACA derivative having the following general formula (III): ##STR3## wherein R.sup.1 and R.sup.2 are defined as above, in the presence of a solvent and a base.
本发明提供了一种制备具有以下一般式(I)的头孢菌素衍生物的方法:##STR1## 其中R.sup.1表示羧基或保护羧基,可以形成与碱金属离子(M.sup.+)如钠的--COO.sup.- M.sup.+盐,或者当R.sup.2具有正电荷的取代基如吡啶基,嘧啶基或噻唑基时,可以表示--COO.sup.-,R.sup.2表示氢,酰氧甲基,杂环甲基或杂环硫甲基,每个基团都可以被适当的取代基取代,R.sup.3表示氢或氨基保护基,R.sup.4表示C.sub.1-C.sub.4烷基或苯基,或者与其连接的氧或磷原子可以形成5或6成员的杂环环,Q表示N或CH,其特征在于,在溶剂和碱的存在下,将以下具有以下一般式(II)的嘧啶(二氢)噻唑乙酸的反应性硫代磷酸酯衍生物酰化与具有以下一般式(III)的7-ACA衍生物:##STR3## 其中R.sup.1和R.sup.2如上所定义,其中R.sup.3,R.sup.4和Q如上所定义。