申请人:Ciba-Geigy Corporation
公开号:US04550162A1
公开(公告)日:1985-10-29
The invention concerns a process for the manufacture of 7.beta.-amino-3-cephem-3-ol-4-carboxylic acid compounds by ring closure of esters of 2-[4-(substituted-thio)-3-acylamino-2-oxoazetidin-1-yl]-3-substituted-amin o-crotonic acids and solvolysing the enamine group in the resulting 7.beta.-acylamino-3-substituted-amino-cephem-4-carboxylic acid esters.
本发明涉及一种通过环闭合2-[4-(取代硫)-3-酰胺基-2-氧代氮丙烯基]-3-取代氨基-巴豆烯酸酯,并使得所得的7-β-酰胺基-3-取代氨基-头孢烷-4-羧酸酯中的烯胺基溶解的方法,以制备7-β-氨基-3-头孢烷-3-醇-4-羧酸化合物。