申请人:Duke Chem, S. A.
公开号:EP1985618A1
公开(公告)日:2008-10-29
Preparation process of brinzolamide of formula (I) comprising the protection of the secondary amine of their non sulfonamide substituted precursor; the chlorosulfonation and the subsequent amination with ammonia of the obtained intermediate; and, finally, the deprotection of the obtained sulfonamide by acid hydrolysis. The process allows to obtain brinzolamide at a industrial scale by using milder reaction conditions and with a high yield at reduced costs. Some new intermediates are used in this process.
化合物(I)的制备过程包括对其非磺酰胺取代前体的次要胺进行保护;氯磺化和随后用氨进行氨化反应得到中间体;最后,通过酸水解去保护所得的磺酰胺。该过程允许在较温和的反应条件下,以较低成本高产率地工业化生产brinzolamide。该过程中使用了一些新的中间体。