Global Patent Index - EP 1841774 A1

EP 1841774 A1 2007-10-10 - PROCESS FOR PREPARING 5,6-DIHYDRO-4-(S)-(ETHYLAMINO)-6-(S) METHYL-4H-THIENOÝ2,3b¨THIOPYRAN-2-SULPHONAMIDE-7,7-DIOXIDE HCI

Title (en)

PROCESS FOR PREPARING 5,6-DIHYDRO-4-(S)-(ETHYLAMINO)-6-(S) METHYL-4H-THIENOÝ2,3b¨THIOPYRAN-2-SULPHONAMIDE-7,7-DIOXIDE HCI

Title (de)

VERFAHREN ZUR HERSTELLUNG VON 5,6-DIHYDRO-4-(S)-(ETHYLAMINO)-6-(S)-METHYL-4H-THIENO[2,3B]THIOPYRAN-2-SULFONSÄUREAMID-7,7-DIOXID-HCL

Title (fr)

PROCÉDÉ DE SYNTHÈSE DU 5,6-DIHYDRO-4-(S)-(ÉTHYLAMINO)-6-(S)MÉTHYL-4H-THIÉNO[2,3b]THIOPYRAN-2-SULFONAMIDE-7,7-DIOXYDE HCI

Publication

EP 1841774 A1 (EN)

Application

EP 04816672 A

Priority

IN 2004000420 W

Abstract (en)

[origin: WO2006070387A1] The present invention relates to an improved process for the preparation of 5,6-dihydro-4-(S)-(ethylamino)-6-(S)methyl-4H-thieno[2,3b]thiopyran-2-sulphonamide-7,7-dioxide hydrochloride of formula (I) commonly known as Dorzolamide Hydrochloride useful as an agent to reduce intraoccular pressure by inhibiting carbonic anhydrase enzyme.

IPC 8 full level (invention and additional information)

C07D 495/04 (2006.01)

CPC (invention and additional information)

C07D 495/04 (2013.01)

Citation (search report)

See references of WO 2006070387A1

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR

EPO simple patent family

WO 2006070387 A1 20060706; AU 2004326111 A1 20060706; BR PI0419257 A 20080506; EP 1841774 A1 20071010; MX 2007007923 A 20071114

INPADOC legal status


2008-12-03 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20080520

2008-02-06 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20080108

2007-11-07 [DAX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT (TO ANY COUNTRY) DELETED

2007-10-10 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20070725

2007-10-10 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR