使用自动化3D电子衍射的药物-聚合物包容复合物的难以捉摸的多态体的相位识别和发现
Molly Lightowler1, Shuting Li2, Xiao Ou2
1Department of Materials and Environmental Chemistry, Stockholm University, Stockholm, SE-106 91, Sweden.
Angewandte Chemie (International ed. in English)
|February 21, 2024
概括
自动化3D电子衍射 (3D ED) 快速识别了六个灰色富尔 (GSF) 水晶相,包括新的纳入复合体. 这种方法可以直接确定复杂的,对光束敏感的药物化合物的结构,这对于药物开发至关重要.
科学领域:
- 晶体学 晶体学是指结晶学.
- 材料科学 材料科学 材料科学
- 制药科学 制药科学
背景情况:
- 3D电子衍射 (3D ED) 是一种强大的技术,用于确定晶体结构.
- 识别活性药物成分的不同固体形式 (多态) 对于药物的有效性和开发至关重要.
- 复杂的结晶产品通常包含多个阶段,使得表征具有挑战性.
研究的目的:
- 实施自动化,低剂量3D ED协议,用于识别和确定灰色富尔 (GSF) 结晶产品中多个相的结构.
- 证明自动化3D ED的功能,用于快速准确的相位识别和对光束敏感材料的结构确定.
- 为了研究晶体结构和GSF纳入复合物的稳定性之间的关系.
主要方法:
- 开发和应用一个自动化的,低剂量的3D ED协议.
- 使用商业软件对230多个数据集进行批量数据收集.
- 自动化数据处理和分析,用于单元细胞的确定和相位识别.
- 使用3D ED. 直接结构确定已识别的阶段.
主要成果:
- 从GSF结晶产品中成功识别了六个阶段,包括已知的形式 (III,I),已知的包含综合体 (GSF-PEG IC-I) 和次要阶段 (II,V和新的GSF-PEG IC-II).
- 精确的单元格参数使直接相位识别成为可能.
- 所有六个阶段的直接结构确定是使用3D ED实现的.
- GSF-PEG 纳入复合物多态的稳定性与它们的晶体结构相关.
结论:
- 自动化3D ED为精确的相位识别和复杂的光束敏感结晶产品的直接结构确定提供了强大的工具.
- 这种技术极大地有助于固体选,这是制药开发的关键方面.
- 该研究强调了低剂量,自动化的3D ED在药物发现和开发中有效表征的潜力.
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