The ability of the antispasmodic agent trospium chloride (TCl) to form solvates was investigated by applying conventional solvate screening methods on 20 solvents. According to the solubility of TCl, different approaches were considered (slow evaporation, slurrying and anti-solvent addition). Five solvates, with the solvents methanol, acetonitrile, propionitrile, N,N-dimethylformamide, nitromethane and dihydrate, were identified and characterized by various analytical techniques. Moreover, a solvate with isopropyl alcohol and TCl sesquihydrate was prepared circumstantially outside the systematic screening. The structures of all the solvates were determined by single crystal X-ray diffraction. The reproducible forms were further characterized by powder X-ray diffraction and desolvation behaviour was observed by thermoanalytical (TGA/DSC) methods. Structural features of novel solvates and of previously described polymorphs and cocrystals of TCl were compared, presented by a tree diagram which classifies the structures according to their molecular packing.
通过对 20 种溶剂采用传统的溶解物筛选方法,研究了解痉剂
氯化曲松(TCl)形成溶解物的能力。根据 TCl 的溶解度,考虑了不同的方法(缓慢蒸发、浆化和添加反溶剂)。通过各种分析技术,确定了
甲醇、
乙腈、
丙腈、
N,N-二甲基甲酰胺、
硝基甲烷和二
水等溶剂的五种溶解物,并对其进行了表征。此外,在系统筛选之外,还间接制备了一种与
异丙醇和四
氯化三
水合物的溶解物。通过单晶 X 射线衍射确定了所有溶解物的结构。通过粉末 X 射线衍射进一步确定了可再现形式的特征,并通过热分析(TGA/
DSC)方法观察了脱溶行为。对新型溶解物的结构特征与之前描述的 TCl 多晶体和共晶体的结构特征进行了比较,并以树形图的形式呈现出来,该树形图根据分子填料对结构进行了分类。