PROCESS FOR PREPARATION OF DIETHYLENETRIAMINEPENTAACETIC ACID DERIVATIVES, AND DIETHYLENETRIAMINEPENTAACETIC ACID DERIVATIVES
申请人:The University of Tokushima
公开号:EP2489655A1
公开(公告)日:2012-08-22
The objective of the present invention is to provide a process for simple and efficient preparation of an intermediate compound to synthesize a gadolinium complex having a substituent for improving a retention property in blood time and specificity to an intended organ. The objective of the present invention is also to provide an intermediate compound produced by the said production process. The process for preparation of the diethylenetriaminepentaacetic acid derivative (I):
wherein R1 to R5 are independently C1-6 alkyl groups;
comprising the steps of:
reacting a diethylenetriaminepentaacetic acid pentaester with a halogenated ally compound in an aprotic solvent;
removing the excess halogenated ally compound (III); and
reacting a reaction product of the diethylenetriaminepentaacetic acid pentaester and the halogenated ally compound with a base in a solvent.
本发明的目的是提供一种简单有效地制备中间化合物的工艺,以合成具有取代基的钆复合物,从而改善血液中的保留时间和对预定器官的特异性。本发明的目的还在于提供一种由上述生产工艺制备的中间化合物。二乙烯三胺五乙酸衍生物(I)的制备工艺:
其中 R1 至 R5 独立地为 C1-6 烷基;
包括以下步骤
二乙烯三胺五乙酸五酯与卤代烯化合物在无相溶剂中反应;
除去过量的卤代烯化合物 (III);以及
二乙烯三胺五乙酸酯和卤代烯化合物的反应产物在溶剂中与碱反应。