申请人:Korea Advanced of Institute of Science and Technology
公开号:US04835267A1
公开(公告)日:1989-05-30
The present invention relates to an improved process for producing cephalosporin derivatives of formula (I), the 3-position of which being substituted by acetoxymethyl or tetrazolylthiomethyl and the 7-acyl group of which being substituted by D-mandelic acid derivatives, which comprises simultaneously reacting the compound of formula (III) with the compound of formula (IV) in the presence of a compound of formula (II) and anamine in high yield, ##STR1## wherein, R.sup.1 is hydrogen or ##STR2## R.sup.2 is methyl, ethyl, propyl or phenyl, X is ##STR3##
本发明涉及一种改进的方法,用于生产公式(I)的头孢菌素衍生物,其3位被乙酰氧甲基或四唑基硫甲基取代,7-酰基被D-苯甘酸衍生物取代,其中同时在高产率下通过在化合物公式(III)和化合物公式(IV)的存在下,与化合物公式(II)和胺一起反应,得到以下产物:##STR1## 其中,R.sup.1是氢或##STR2##,R.sup.2是甲基、乙基、丙基或苯基,X是##STR3##。