EP 2024369 A4 20101027 - 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
Application
Priority
- IN 2007000219 W 20070601
- IN 960CH2006 A 20060605
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
C07C 65/05 (2006.01); C07D 231/06 (2006.01); C07D 487/04 (2006.01)
CPC (source: EP)
C07D 231/40 (2013.01); C07D 295/26 (2013.01); C07D 487/04 (2013.01)
Citation (search report)
- [X] BAXENDALE I R ET AL: "Polymer-supported reagents for multi-step organic synthesis: application to the synthesis of sildenafil", BIOORGANIC & MEDICINAL CHEMISTRY LETTERS, PERGAMON, ELSEVIER SCIENCE, GB LNKD- DOI:10.1016/S0960-894X(00)00383-8, vol. 10, no. 17, 1 September 2000 (2000-09-01), pages 1983 - 1986, XP004214152, ISSN: 0960-894X
- See references of WO 2007141805A2
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
DOCDB simple family (publication)
WO 2007141805 A2 20071213; WO 2007141805 A3 20080221; EP 2024369 A2 20090218; EP 2024369 A4 20101027
DOCDB simple family (application)
IN 2007000219 W 20070601; EP 07805617 A 20070601