申请人:Takasago International Corporation
公开号:US05191076A1
公开(公告)日:1993-03-02
A process for producing a 4-acetoxyazetidinone represented by formula (I): ##STR1## wherein Z represents a hydrogen atom, a lower alkyl group, or a protected or unprotected hydroxyethyl group; and W represents a hydrogen atom, a lower alkyl group, or a group of --COOR.sup.1, wherein R.sup.1 represents a lower alkyl group, is disclosed, which comprises reacting an azetidinone represented by formula (II): ##STR2## wherein Z is as defined above; and Y represents a hydrogen atom, carboxyl group, a lower alkyl group, or a group of --COOR.sup.1, wherein R.sup.1 represents a lower alkyl group, with acetic acid and an oxidizing agent in the presence of, as a catalyst, an anhydrous or hydrous osmium compound represented by OsX.sub.3, wherein X represents a chlorine atom, a bromine atom, or an iodine atom.
本发明涉及一种制备式(I)所表示的4-乙酰氧基氮杂环丹宁的方法:##STR1## 其中Z表示氢原子、低级烷基或保护或未保护的羟乙基基团;W表示氢原子、低级烷基或--COOR.sup.1基团,其中R.sup.1表示低级烷基。该方法包括将式(II)所表示的氮杂环丹宁:##STR2## 其中Z如上所定义;Y表示氢原子、羧基、低级烷基或--COOR.sup.1基团,其中R.sup.1表示低级烷基,与乙酸和氧化剂反应,在无水或含水的氧化铂化合物催化剂的存在下,所述催化剂表示为OsX.sub.3,其中X表示氯原子、溴原子或碘原子。