申请人:Matsumoto Nobuo
公开号:US20050215782A1
公开(公告)日:2005-09-29
A chlorinated azetidinone derivative expressed by Formula (1) and an alcoholate are allowed to react in a solvent containing at least one of alcohols and an ether at a pH of 8 or less. Thus a 3-chloromethyl-3-cephem derivative expressed by formula (2) is prepared. In the formulas, R
1
represents a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic residue, and R
2
and R
3
each represent a substituted or unsubstituted aromatic hydrocarbon group.
通过式(1)表达的氯代氮杂环丙酮衍生物和醇盐在至少含有一种醇类或醚类的溶剂中,在pH值小于8的条件下进行反应。从而制备出通过式(2)表达的3-氯甲基-3-头孢烯衍生物。在公式中,R1表示取代或未取代的芳基或取代或未取代的杂环残基,R2和R3分别表示取代或未取代的芳香烃基。