Process for the preparation of (R)-(+)-4-(Ethylamino)-3,4-dihydro-2-(3-methoxypropyl)-2H-thieno[3,2-e]-1,2-thiazine-6-sulfonamide-1,1-dioxide.
申请人:Sathe Dhananjay Govind
公开号:US20100009977A1
公开(公告)日:2010-01-14
Disclosed herein is an improved process for the preparation of (R)-(+)-4-(Ethylamino)-3,4-dihydro-2-(3-methoxypropyl)-2H-thieno[3,2-e]-1,2-thiazine-6-sulfonamide-1,1-dioxide (Brinzolamide) and novel intermediates thereof.
Process for the preparation of brinzolamide and intermediates thereof
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.
IMPROVED PROCESS FOR THE PREPARATION OF (R)-(+)-4-(ETHYIAMINO)-3,4-DIHYDRO-2-(3- METHOXYPROPYL)-2H-THIENO[3,2-E]-L,2-THIAZINE-6-SULFONAMIDE-L,L-DIOXIDE
申请人:USV Limited
公开号:EP2079749A2
公开(公告)日:2009-07-22
WO2008132114A1
申请人:——
公开号:——
公开(公告)日:——
[EN] IMPROVED PROCESS FOR THE PREPARATION OF (R)-(+)-4-(ETHYIAMINO)-3,4-DIHYDRO-2-(3- METHOXYPROPYL)-2H-THIENO[3,2-E]-L,2-THIAZINE-6-SULFONAMIDE-L,L-DIOXIDE<br/>[FR] PROCÉDÉ PERFECTIONNÉ POUR LA PRÉPARATION DE (R)-(+)-4-(ÉTHYLAMINO)-3,4-DIHYDRO-2-(3-MÉTHOXYPROPYL)-2H-THIÉNO[3,2-E]-1,2-THIAZINE-6-SULFONAMIDE-1,1-DIOXYDE
申请人:USV LTD
公开号:WO2008062463A2
公开(公告)日:2008-05-29
[EN] Disclosed herein is an improved process for the preparation of (R)-(+)-4- (Ethylamino)-3,4-dihydro-2-(3-methoxypropyl)-2H-thieno[3,2-e]-1,2-thiazine-6- sulfonamide- 1,1 -dioxide (Brinzolamide) and novel intermediates thereof. [FR] L'invention concerne un procédé perfectionné pour la préparation de (R)-(+)-4-(éthylamino)-3,4-dihydro-2-(3-méthoxypropyl)-2H-thiéno[3,2-e]-1,2-thiazine-6-sulfonamide-1,1-dioxyde (Brinzolamide) et de nouveaux intermédiaires de celui-ci.