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首页> 外文期刊>Crystal growth & design >Resolution of Baclofenium Hydrogenomaleate By Using Preferential Crystallization. A First Case of Complete Solid Solution at High Temperature and a Large Miscibility Gap in the Solid State
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Resolution of Baclofenium Hydrogenomaleate By Using Preferential Crystallization. A First Case of Complete Solid Solution at High Temperature and a Large Miscibility Gap in the Solid State

机译:利用优先结晶,通过使用优先结晶分辨出氢氯苯甲酰胺。 高温下完全固溶的第一种案例和固态的大混溶性差距

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摘要

The (R)- and (S)-baclofenium hydrogenomaleate system exhibits an extensive chiral discrimination in the solid state at room temperature. Nevertheless, above 145 degrees C, the critical temperature, a complete solid solution between the two enantiomers is stable. The 50-50 mixture does not form any racemic compound at any temperature, and at 20 degrees C, the two mirror phases show limited symmetrical solid solutions as the enantiomeric excess equals 98.5%. This is due to a large miscibility gap in the solid state. Close to room temperature, the racemic mixture can be resolved by preferential crystallization. The yield of the process can be enhanced in acidic aqueous solutions (e.g., in HCl aq 2 M), which increases the solubility.
机译:(R) - 和(S) - 萘氯甲酰胺体系在室温下在固态上表现出广泛的手性辨别。 然而,高于145℃,临界温度,两个对映体之间的完全固溶体是稳定的。 50-50混合物在任何温度下不形成任何外消旋化合物,并且在20℃下,两个镜相显示出有限的对称固溶体,因为对映体过量等于98.5%。 这是由于固态的巨大混溶性差距。 接近室温,外消旋混合物可以通过优先结晶来解决。 可以在酸性水溶液(例如,在HCl AQ 2M中的酸性水溶液中增强该方法的产率,这增加了溶解度。

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