申请人:MedImmune Oncology, Inc.
公开号:US20030199694A1
公开(公告)日:2003-10-23
The present invention provides for thermally stable forms of 2,4-diamino-5-methyl-6-[(3,4,5-trimethoxyanilino)methyl] quinazoline, or trimetrexate. A crystalline 2,4-diamino-5-methyl-6-[(3,4,5-trimethoxyanilino)methyl] quinazoline monohydrate, or trimetrexate monohydrate, belonging to the space group Poverscore (1)}(#2) and having a triclinic cell with dimensions of about a=7.699 Å, b=9.606 Å and c=13.012 Å is disclosed. A novel Schiff base compound, 2,4-diamino-5-methyl-6-[(3,4,5-trimethoxyphenylimino)-methinyl]quinazoline, is also disclosed. The present invention further provides novel methods of producing stable trimetrexate free base compounds, including crystalline trimetrexate monohydrate. The crystalline monohydrate form provides increased stability over the anhydrous form.
本发明提供了2,4-二氨基-5-甲基-6-[(3,4,5-三甲氧基苯胺基)甲基]喹唑啉或三甲嘧啶的热稳定形式。其中揭示了属于空间群Poverscore (1)}(#2)、具有三斜晶胞尺寸为a≈7.699Å、b≈9.606Å和c≈13.012Å的2,4-二氨基-5-甲基-6-[(3,4,5-三甲氧基苯胺基)甲基]喹唑啉单水合物或三甲嘧啶单水合物的晶体。此外,本发明还揭示了一种新的席夫碱化合物,即2,4-二氨基-5-甲基-6-[(3,4,5-三甲氧基苯亚胺基)-甲基炔基]喹唑啉。本发明还提供了新的稳定三甲嘧啶游离基化合物的制备方法,包括晶体三甲嘧啶单水合物。晶体单水合物形式比无水形式具有更高的稳定性。