申请人:ALBRIGHT & WILSON UK LIMITED
公开号:EP0657462A1
公开(公告)日:1995-06-14
A method for the production of azacycloalkane-2,2-diphosphonic acids of general formula;
where n is a whole number of from 2 to 16, Y is H, an alkyl or alkenyl, a substituted alkyl, or an aryl, such that the group "Y" remains unchanged during the reaction,
by reaction of a lactam with a phosphorus trihalide in the presence of phosphorous acid and/or water, in which the reaction mixture also includes an organic amine and/or or an organic amine salt, said reaction being followed by hydrolysis of the reaction mixture and purification of the reaction product to obtain the diphosphonic acid.
The method is exemplified by the preparation of azacycloheptane-2,2-diphosphonic acid, and azacyclononane-2,2-diphosphonic acid.
一种生产通式为氮杂环烷-2,2-二膦酸的方法;
其中 n 为 2 至 16 的整数,Y 为 H、烷基或烯基、取代烷基或芳基,使基团 "Y "在反应过程中保持不变、
在磷酸和/或水的存在下,内酰胺与三卤化磷反应,其中反应混合物还包括有机胺和/或或有机胺盐,反应后水解反应混合物并纯化反应产物,得到二膦酸。
该方法可用于制备氮杂环庚烷-2,2-二膦酸和氮杂环壬烷-2,2-二膦酸。