A process for the preparation of bosentan monohydrate of pharmaceutical purity is characterized by that crude bosentan is suspended in methyl alcohol / dichloromethane mixture at a volume ratio from 8:1 to 1:2, the mixture is stirred at room temperature, crystalline bosentan monohydrate is isolated, dried to constant weight and optionally crystallized to obtain appropriate crystal shape.
制备药用纯度的
波生坦单
水合物的方法特点在于,将粗
波生坦悬浮在
甲醇/
二氯甲烷混合物中,体积比为8:1至1:2,混合物在室温下搅拌,分离结晶
波生坦单
水合物,干燥至恒定重量,可选择性地结晶以获得适当的晶体形状。