申请人:Takeda Chemical Industries, Ltd.
公开号:US04166178A1
公开(公告)日:1979-08-28
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.
新型的3-酰氧甲基头孢菌素化合物的化学式如下:其中R.sup.1为氢或酰基;X为二价基团,由具有2至3个碳原子的碳链和一个端部含有羰基或磺酰基的基团组成,该二价基团在碳链上可以是取代或未取代的;Z为有机酸残基及其盐,发现它们可作为制备头孢菌素的起始材料:其中R.sup.2代表亲核化合物的残基,R.sup.1的含义与上述相同。