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Rational Crystal Polymorph Design of Olanzapine

机译:奥兰扎丁合理的水晶多晶型设计

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摘要

Polymorphism refers to the phenomenon that crystals of the same chemical composition can crystallize into several different forms with different physicochemical conditions. Studying the polymorphism of drugs has become an indispensable and important part of daily predesign work for drug production and formulation. Here, we use ab initio computational calculations in combination with rational crystal structure design and morphology prediction to study the polymorphism of the pharmaceutical compound olanzapine, an effective drug to treat schizophrenia, using density functional theory and second-order Meller-Plesset perturbation methods. Different crystal polymorphs are found at the calculated energy landscape, and the analysis of Gibbs free energy and Raman spectra confirms that the long-accepted form I of olanzapine is identified as the most thermodynamically stable structure. With the increase of temperature, form I of olanzapine exhibits greater stability than that of form II. Rather than the traditional lattice energy calculations, we use the Gibbs free energy to evaluate the stability of crystal structure, which includes the effects of entropy and temperature and is more accurate when predicting the crystal structures. We also provide an effective method to identify different forms of polycrystalline structures based on the vibrational spectra and offer an advanced tool to predict the crystal morphologies. The present paper offers a platform for rational design of pharmaceutical molecules, which not only reestablishes the crystal structures of existing drugs but also provides motivation for the possibility of the exploration of new drugs with special efficacy.
机译:多态性是指相同化学组合物的晶体可以在不同的物理化学条件下结晶的晶体中的现象。研究药物的多态性已成为毒品生产和配方日常预测工作的不可或缺和重要的一部分。在这里,我们使用AB Initio计算计算与合理的晶体结构设计和形态预测相结合,以研究药物化合物Olanzapine的多态性,这是一种治疗精神分裂症的有效药物,使用密度函数理论和二阶Meller-Plesset扰动方法。在计算的能量景观中发现了不同的晶体多晶型物,并且对GIBBS自由能和拉曼光谱的分析证实,奥氮藻的长期接受形式I被鉴定为最热力学稳定的结构。随着温度的增加,奥氮藻的形式I表现出比形式II的稳定性更大。我们使用GIBBS自由能量来评估晶体结构的稳定性,而不是传统的格子能量计算,这包括熵和温度的效果,并且在预测晶体结构时更准确。我们还提供了一种有效的方法,可根据振动光谱识别不同形式的多晶结构,并提供先进的工具来预测晶体形态。本文为药物分子的合理设计提供了平台,不仅重新建立了现有药物的晶体结构,还提供了具有特殊疗效探索新药的动机。

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  • 来源
    《Crystal growth & design》 |2019年第4期|共8页
  • 作者单位

    Shanghai Jiao Tong Univ Dept Micro Nanoelect Minist Educ Key Lab Thin Film &

    Microfabricat Shanghai 200240 Peoples R China;

    East China Normal Univ Sch Chem &

    Mol Engn Shanghai Engn Res Ctr Mol Therapeut &

    New Drug De Shanghai 200062 Peoples R China;

    Chinese Acad Sci Shanghai Inst Organ Chem 345 Lingling Rd Shanghai 200032 Peoples R China;

    Chinese Acad Sci Shanghai Inst Organ Chem 345 Lingling Rd Shanghai 200032 Peoples R China;

    East China Normal Univ Sch Chem &

    Mol Engn Shanghai Engn Res Ctr Mol Therapeut &

    New Drug De Shanghai 200062 Peoples R China;

    Shanghai Jiao Tong Univ Dept Micro Nanoelect Minist Educ Key Lab Thin Film &

    Microfabricat Shanghai 200240 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 晶体学;
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