申请人:Takeda Chemical Industries, Ltd.
公开号:EP0146900A2
公开(公告)日:1985-07-03
An azetidinone of the formula:
wherein R.O.CO is a protective group for the amino group; R2 is a protective group for the nitrogen atom of the imino compound; R3 is an organic residue bonding through a carbon atom thereof, which is produced with industrial advantages by reacting a compound of the formula:
wherein R.O.CO is as defined above; CO.OR1 is an esterified carboxyl group, with a compound of the formula:
wherein the symbols are as defined above, or a salt thereof.
式中的氮杂环丁酮:
其中,R.O.CO 是氨基的保护基团;R2 是亚氨基化合物氮原子的保护基团;R3 是通过其碳原子键合的有机残基,该有机残基通过使式如下的化合物反应制得,具有工业优势:
其中 R.O.CO 如上定义;CO.OR1 是酯化的羧基,与式中化合物反应制得,具有工业优势:
其中符号如上定义,或其盐。