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首页> 外文期刊>Crystal growth & design >Anhydrates and Hydrates of Olanzapine: Crystallization, Solid-State Characterization, and Structural Relationships
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Anhydrates and Hydrates of Olanzapine: Crystallization, Solid-State Characterization, and Structural Relationships

机译:奥氮平的无水物和水合物:结晶,固态表征和结构关系

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摘要

Olanzapine, a novel benzodiazepine agent used in the treatment of schizophrenia and related psychoses, crystallizes in 25+ crystal forms, seven of which are pharmaceutically relevant: three anhydrates (I-III), three dihydrates (B, D, and E), and a higher hydrate. X-ray crystal structures of the thermodynamically stable anhydrous form (I), two dihydrates (B and D), a higher hydrate, and a Rietveld-refined structure of dihydrate E have permitted a detailed analysis of the conformational, hydrogen bonding, and crystal packing preferences of olanzapine. The symmetry and hydrogen-bonding interactions in the crystal forms have also been characterized by ~(13)C and ~(15)N CP/MAS NMR spectroscopy. Using the crystallographic and spectroscopic data, significant structural relationships have been identified between the crystal forms of olanzapine. The present study demonstrates the utility of integrating crystallography, spectroscopy, and crystal modeling in detailed structural investigations of polymorphism (and solvate formation) and for rationalizing crystallization outcomes. This study also shows that polymorphism and hydrate formation can be used to optimize the physical presentation of pharmaceutical solids.
机译:奥氮平是一种用于治疗精神分裂症和相关精神病的新型苯二氮卓类药物,其结晶形式为25种以上的晶体形式,其中七种与药物相关:三种无水物(I-III),三种二水合物(B,D和E),以及高水合物。热力学稳定的无水形式(I),两种二水合物(B和D),高级水合物和Rietveld精制的二水合物E的X射线晶体结构已允许对构象,氢键和晶体进行详细分析奥氮平的包装偏好。还通过〜(13)C和〜(15)N CP / MAS NMR光谱对晶体形式的对称性和氢键相互作用进行了表征。使用晶体学和光谱学数据,已经确定了奥氮平晶体形式之间的重要结构关系。本研究证明了整合晶体学,光谱学和晶体模型在多态性(和溶剂化物形成)的详细结构研究中以及使结晶结果合理化的实用性。该研究还表明,多态性和水合物形成可用于优化药物固体的物理外观。

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