Global Patent Index - EP 2024369 A2

EP 2024369 A2 2009-02-18 - NOVEL PROCESS FOR THE PREPARATION OF SILDENAFIL CITRATE

Title (en)

NOVEL PROCESS FOR THE PREPARATION OF SILDENAFIL CITRATE

Title (de)

NEUES VERFAHREN ZUR HERSTELLUNG VON SILDENAFILCITRAT

Title (fr)

NOUVEAU PROCÉDÉ DE PRÉPARATION DU CITRATE DE SILDÉNAFIL

Publication

EP 2024369 A2 (EN)

Application

EP 07805617 A

Priority

  • IN 2007000219 W
  • IN 960CH2006 A

Abstract (en)

[origin: WO2007141805A2] Disclosed herein the process for producing 5-[2-ethoxy-5-(4-methyl)piperazine-l-yl- sulfonyl)phenyl]- 1 -methyl-3-n-propyl- 1 ,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one or its salt thereof employing novel intermediate.

IPC 8 full level (invention and additional information)

C07D 487/04 (2006.01); C07C 65/05 (2006.01); C07D 231/06 (2006.01)

CPC (invention and additional information)

C07D 231/40 (2013.01); C07D 295/26 (2013.01); C07D 487/04 (2013.01)

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 LV MC MT NL PL PT RO SE SI SK TR

Designated extension state (EPC)

AL BA HR MK RS

EPO simple patent family

WO 2007141805 A2 20071213; WO 2007141805 A3 20080221; EP 2024369 A2 20090218; EP 2024369 A4 20101027

INPADOC legal status


2011-11-30 [18D] APPLICATION DEEMED TO BE WITHDRAWN

- Effective date: 20110427

2010-10-27 [A4] DESPATCH OF SUPPLEMENTARY SEARCH REPORT

- Effective date: 20100923

2009-09-09 [DAX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT (TO ANY COUNTRY) (DELETED)

2009-02-18 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20081206

2009-02-18 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

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

2009-02-18 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Countries: AL BA HR MK RS