Novel glycopyrronium fatty acid salts have been developed. Bi-phasic reaction conditions enable the desired counterion exchange reactions between glycopyrronium bromide and fatty acid salts of alkali metals and alkaline earth metals in methods to form glycopyrronium fatty acid salts. In preferred embodiments, an excess of the free fatty acid in the reaction mixture stabilizes the glycopyrronium fatty acid salt and reduces the formation of the impurity, Acid A. In some preferred embodiments, between 0.2 and 1.2 molar equivalent of excess free fatty acid is added to the reaction mixture. In another embodiment, approximately 1.2 molar equivalent of excess free fatty acid is added to the reaction mixture.
已经开发出新型的
格隆溴铵脂肪酸盐。采用双相反应条件,使
格隆溴铵与碱
金属和碱土
金属的
脂肪酸盐发生所需的离子交换反应,以形成
格隆溴铵脂肪酸盐。在优选实施例中,反应混合物中过量的游离
脂肪酸稳定了
格隆溴铵脂肪酸盐,减少了杂质酸A的形成。在某些优选实施例中,反应混合物中添加0.2到1.2摩尔当量的过量游离
脂肪酸。在另一实施例中,反应混合物中添加了大约1.2摩尔当量的过量游离
脂肪酸。