The present invention relies on a process for the preparation of non ionic iodinated contrast agents and, in more details, it relates to a process for the preparation of Iopamidol in high yields and with a high degree of purity. In more details, the invention discloses a process for the preparation of a compound of formula (III) comprising the 5 condensation reaction a compound of formula (II) with 2-amino-1,3-propandiol, being said reaction carried out in an aprotic dipolar solvent and in the presence of an alkaline or alkaline rare earth metal oxide or hydroxide.
本发明依赖于一种制备非离子
碘造影剂的过程,更详细地说,它涉及一种高产率和高纯度制备Iopamidol的过程。更详细地说,本发明揭示了一种制备式(III)化合物的过程,包括将式(II)化合物与2-
氨基-
1,3-丙二醇进行5缩合反应,所述反应在无极性双极溶剂中,在碱性或碱性稀土金属氧化物或氢氧化物的存在下进行。