申请人:Astellas Pharma Inc.
公开号:EP2042498A1
公开(公告)日:2009-04-01
Object
Provided are β-form crystal, γ-form crystal, and α-form crystal of a benzoxadiazole derivative, wherein a uniform crystal having sufficient qualities can be obtained with high reproducibility, and they can be anytime supplied as crystals of drug substance for use in producing pharmaceuticals, are particularly suitable for mass synthesis in industrial production, hardly exhibit hygroscopicity and have particularly excellent photo-resistance.
Means for Resolution
A solving means includes β-form crystal of 4-[3-isopropyl-5-(6-phenyl-3-pyridyl)-4H-1,2,4-triazol-4-yl]-2,1,3-benzoxadiazole, which shows an endothermic peak at 145 to 150°C according to a differential scanning calorimeter analysis (DSC analysis) and shows X-ray powder diffraction peaks at 9.8, 11.1, 12.8, 13.3, 17.1, 20.2, 21.2 and 22.3 in 2θ(°), and the like. Selected Figure
目的
本发明提供了苯并噁二唑衍生物的β-形式晶体、γ-形式晶体和α-形式晶体,在这些晶体中,可以以较高的重现性获得具有足够质量的均匀晶体,并且它们可以作为用于生产药品的药物物质晶体随时供应,特别适合在工业生产中进行大规模合成,几乎不表现出吸湿性,并且具有特别优异的抗光性。
溶解装置
一种溶解手段包括 4-[3-异丙基-5-(6-苯基-3-吡啶基)-4H-1,2,4-三唑-4-基]-2,1,3-苯并噁二唑的β形晶体,根据差示扫描量热仪分析(DSC 分析),该晶体在 145 至 150°C 处显示出内热峰,并在 9.8、11.1、12.8、13.3、17.1、20.2、21.2 和 22.3 的 2θ(°)等处显示 X 射线粉末衍射峰。选图