...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Crystal growth & design >Elucidating the Dehydration Mechanism of Ondansetron Hydrochloride Dihydrate with a Crystal Structure
【24h】

Elucidating the Dehydration Mechanism of Ondansetron Hydrochloride Dihydrate with a Crystal Structure

机译：用晶体结构阐明盐酸甘蔗酮二水合物的脱水机理

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In drug development, evaluating the stability of the hydrate is particularly important because changes in the hydration state could cause alterations of the physicochemical properties. In this study, it was found that ondansetron hydrochloride dihydrate, a competitive serotonin type 3 receptor antagonist, dehydrated to anhydrate in two steps with a hemihydrate form as an intermediate. The crystal structures of the unstable hemihydrate and anhydrate forms were successfully analyzed through the structure determination from powder diffraction data technique using high-temperature synchrotron X-ray diffraction data. Comparison of the crystal structures of the dihydrate and hemihydrate revealed that in the first dehydration step the water molecule hydrogen-bonded to the imidazole ring was removed. In the second step, the remaining water molecule that was closely bound to the chloride anions was removed to form a void. Moreover, the dehydration was examined through analysis of the intermolecular interactions. Furthermore, the hygroscopic properties of the hydration and dehydration were investigated. These phase transitions triggered by dry and high temperature conditions are common in drug development. Therefore, the crystal structure and physicochemical properties of all phases of hydrates and anhydrates should be characterized.
机译：在药物开发中，评估水合物的稳定性尤其重要，因为水合状态的变化可能导致物理化学性质的改变。在本研究中，发现甘司琼二水合物，竞争性血清素型3受体拮抗剂，用半水合物形式用半水合物形式脱水至多水合物。通过使用高温同步X射线衍射数据的粉末衍射数据技术成功地分析了不稳定的半水合物和无水水合物形式的晶体结构。二水合物和半水合物的晶体结构的比较显示，在第一脱水步骤中，除去氢键合与咪唑环的水分子。在第二步中，除去与氯化物阴离子紧密结合的剩余水分子以形成空隙。此外，通过分解分子间相互作用来检查脱水。此外，研究了水化和脱水的吸湿性性质。通过干燥和高温条件触发的这些相变在药物发育中是常见的。因此，应表征水合物和无水水合物的所有阶段的晶体结构和物理化学性质。

著录项

  • 来源
    《Crystal growth & design》 |2018年第10期|共8页
  • 作者

    Mizoguchi Ryo; Uekusa Hidehiro;

  • 作者单位

    Tokyo Inst Technol Dept Chem &

    Mat Sci Meguro Ku Ookayama 2-12-1 Tokyo 1528551 Japan;

    Tokyo Inst Technol Dept Chem &

    Mat Sci Meguro Ku Ookayama 2-12-1 Tokyo 1528551 Japan;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 晶体学;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号