申请人:VIWIT PHARMACETICAL CO., LTD.
公开号:US20200347023A1
公开(公告)日:2020-11-05
Disclosed is a method for preparing 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid (DOTA) of formula (II), comprising the following steps: carrying out an alkylation reaction on cyclen in formula (I) and XCH
2
COOR in the presence of an acid-binding agent in water; adjusting a pH value to separate out a crude product of DOTA; and recrystallizing. The preparation method of the present invention is applicable to large-scale industrial production of DOTA, the whole process does not need to adopt an ion-exchange resin or low-temperature refrigeration mode for purification, and the purity and yield of the product are higher.
本发明公开了一种制备1,4,7,10-四氮杂环十二烷-1,4,7,10-四乙酸(DOTA)的方法,包括以下步骤:在水中存在酸中和剂的情况下对公式(I)中的环烷进行烷基化反应,以及XCH2COOR;调节pH值分离出DOTA的粗品;并进行重结晶。本发明的制备方法适用于大规模工业生产DOTA,整个过程不需要采用离子交换树脂或低温冷却模式进行纯化,产品的纯度和收率更高。