申请人:Takeda Chemical Industries, Ltd.
公开号:US04224441A1
公开(公告)日:1980-09-23
Novel 3-acyloxymethyl-cephem compounds of the formula: ##STR1## wherein R.sup.1 is hydrogen or an acyl group; X is a divalent group consisting of a carbon chain having 2 to 3 carbon atoms and a carbonyl or sulfonyl group at one terminal end thereof, said divalent group being either substituted or unsubstituted on the carbon chain; and Z is an organic acid residue, and salts thereof were found to be useful as starting materials for preparing cephalosporins of the formula: ##STR2## wherein R.sup.2 stands for a residue of a nucleophilic compound and R.sup.1 has the same meaning as above.
化合物的名称为Novel 3-acyloxymethyl-cephem,分子式为:##STR1## 其中R.sup.1是氢或酰基;X是一个二价基团,由一个碳链和一个羰基或磺酰基组成,该二价基团在碳链上是取代或未取代的;Z是一个有机酸残基。这些化合物及其盐被发现可用作制备头孢菌素的起始材料,头孢菌素的分子式为:##STR2## 其中R.sup.2代表亲核化合物残基,R.sup.1具有与上述相同的含义。