[EN] A NOVEL PROCESS FOR THE PREPARATION OF 7 (4, 7- DIAZASPIRO [2.5] OCTAN-7-YL)-2-(2,8 DIMETHYLIMIDAZO[1,2-B] PYRID AZIN-6- YL) PYRIDO-4H-[1,2-A] PYRIMIDIN-4-ONE WITH NOVEL INTERMEDIATES<br/>[FR] NOUVEAU PROCESSUS DE PRÉPARATION DE 7-(4,7-DIAZASPIRO[2,5]OCTANE-7-YL)-2-(2,8 DIMÉTHYLIMIDAZO[1,2-B]PYRIDAZINE-6-YL)PYRIDO-4H-[1,2-A]PYRIMIDINE-4-ONE AVEC DE NOUVEAUX INTERMÉDIAIRES
申请人:[en]BIOPHORE INDIA PHARMACEUTICALS PVT. LTD.
公开号:WO2024003798A1
公开(公告)日:2024-01-04
The present invention relates to a process for the preparation of 7-(4,7-diazaspiro [2.5] octan- 7-yl)-2-(2,8-dimethylimidazo[l,2-b] pyridazin-6-yl) pyrido-4H-[1,2-a] pyrimidin-4-one represented by the following structural formula (1) by employing novel intermediates of formulae (5), (6), (7), (9) and (13). (1) The present invention further relates to process for the purification of 7-(4,7-diazaspiro [2.5] octan-7-yl)-2-(2,8-dimethylimidazo[1,2-b] pyridazin-6-yl) pyrido-4H-[1,2-a] pyrimidin-4-one (1), is with purity greater than 99.5% by High-performance liquid chromatography.