The present invention relates to a process for the preparation of pyrvinium pamoate, which comprises reacting pyrvinium methyl sulphate salt of formula (II) with disodium pamoate of formula (III), in the presence of a base; to processes for the preparation of crystalline Form A and crystalline Form III of pyrvinium pamoate; as well as a process for the purification of crystalline Form III. It also relates to crystalline Forms A and III of pyrvinium pamoate and to pharmaceutical compositions containing them.
本发明涉及一种制备
吡维
溴铵帕莫酸盐的方法,其包括在碱的存在下,将式(II)的
吡维
溴铵甲基
硫酸盐与式(III)的双
钠帕莫酸盐反应;以及制备
吡维
溴铵帕莫酸盐的结晶形式A和结晶形式III的方法。同时还涉及一种纯化结晶形式III的方法。本发明还涉及
吡维
溴铵帕莫酸盐的结晶形式A和结晶形式III,以及含有它们的制药组合物。