申请人:TONGLI BIOMEDICAL CO., LTD
公开号:US20160272636A1
公开(公告)日:2016-09-22
The present invention relates to a crystal form of (R)-praziquantel and a preparation method and uses thereof. The X-ray diffraction pattern (CuKα radiation) of the crystal form of (R)-praziquantel at 25° C. shows the following diffraction peaks: 2-Theta=6.9±0.2°, 8.3±0.2°, 15.1±0.2°, 17.4±0.2°, 19.8±0.2°, 21.9±0.2°, 24.3±0.2° or d=12.74±0.20 Å, 10.61±0.20 Å, 5.87±0.20 Å, 5.09±0.20 Å, 4.48±0.20 Å, 4.06±0.20 Å, 3.66±0.20 Å. Compared to the existing crystal form of praziquantel, the crystal form of the present invention has better solubility, better drug efficacy and better pharmacokinetic characteristics. The preparation method of the present invention has the following advantages: good reproducibility, environmentally friendly, low cost, and able to operate at a normal pressure and temperature, and suitable for large-scale production.
本发明涉及(R)-吡喹酮的晶型及其制备方法和用途。在25°C下,(R)-吡喹酮的晶型的X射线衍射图谱(CuKα辐射)显示以下衍射峰:2-Theta=6.9±0.2°、8.3±0.2°、15.1±0.2°、17.4±0.2°、19.8±0.2°、21.9±0.2°、24.3±0.2°或d=12.74±0.20 Å、10.61±0.20 Å、5.87±0.20 Å、5.09±0.20 Å、4.48±0.20 Å、4.06±0.20 Å、3.66±0.20 Å。与现有的吡喹酮晶型相比,本发明的晶型具有更好的溶解性、更好的药效和更好的药代动力学特性。本发明的制备方法具有以下优点:具有良好的再现性,环保,成本低,能够在常压和温度下操作,并适用于大规模生产。