高等学校化学学报 ›› 2024, Vol. 45 ›› Issue (1): 20230400.doi: 10.7503/cjcu20230400

• 有机化学 • 上一篇    下一篇

利格列汀多晶型研究

刘奇1, 刘沫毅2, 董思雨3, 王学重1, 何运良1()   

  1. 1.北京石油化工学院新材料与化工学院, 恩泽生物质精细化工北京市重点实验室, 北京 102617
    2.华润双鹤药业股份有限公司, 北京 100124
    3.北京石油化工学院信息工程学院, 北京 102617
  • 收稿日期:2023-09-07 出版日期:2024-01-10 发布日期:2023-11-10
  • 通讯作者: 何运良 E-mail:heyunliang@bipt.edu.cn

Study on the Polymorphism of Linagliptin

LIU Qi1, LIU Moyi2, DONG Siyu3, WANG Xuezhong1, HE Yunliang1()   

  1. 1.Beijing Key Laboratory of Enze Biomass Fine Chemicals,College of New Materials and Chemical Engineering,Beijing Institute of Petrochemical Technology,Beijing 102617,China
    2.China Resources Double?crane Pharmaceutical Co. ,Ltd. ,Beijing 100124,China
    3.College of Information Engineering,Beijing Institute of Petrochemical Technology,Beijing 102617,China
  • Received:2023-09-07 Online:2024-01-10 Published:2023-11-10
  • Contact: HE Yunliang E-mail:heyunliang@bipt.edu.cn

摘要:

研究了利格列汀复杂的晶型现象及其晶格中的构象变化. 通过培养利格列汀的单晶并进行X射线单晶衍射分析, 首次得到了包括晶型A在内的3种晶体结构; 结合文献已报道的2种晶体结构, 分析了各晶体结构的特点及其晶格中的分子构象. 研究结果表明, 5种晶体里存在晶型A和晶型F两种晶型, 其中晶型F为准多晶型, 可以包含多种溶剂, 形成通道型溶剂合物, 其晶格参数随包含的溶剂略有变化. 晶型A的构象与晶型F的构象存在较高能垒, 导致2种晶型难以互相转化. 晶型F不同溶剂合物之间的分子构象并不完全相同, 在粉末X射线衍射(PXRD)谱图上也有显著差异. 最后, 通过混悬转晶和热分析等方法研究了晶型之间的转化关系.

关键词: 利格列汀, 多晶型, 构象, 通道型溶剂合物

Abstract:

In this paper, the complicated polymorphism of linagliptin was investigated along with conformational changes in the lattice. Three crystal structures including form A were obtained for the first time by the growth of single crystals and X-ray single-crystal diffraction analysis. The structure and molecular conformation of each crystal were analyzed in combination with two crystal structures reported in the literature. Two crystal forms, form A and form F, are found among the five crystals. Form F can exist as a variety of channel solvates, with lattice parameters varying slightly with the included solvent. There is a high energy barrier between the conformers in form A lattice and those in form F, which probably accounts for the difficult conversion from form F to form A. The molecular conformations are not identical in the varieties of form F, and their powder X-ray raditional diffraction(PXRD) patterns are also distinctly different. Finally, the conversion between form A and form F was revealed by common methods, such as suspension conversion and thermal analysis.

Key words: Linagliptin, Polymorphism, Conformer, Channel solvate

中图分类号: 

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