(19)
(11) EP 2 109 601 A2

(12)

(88) Date of publication A3:
20.11.2008

(43) Date of publication:
21.10.2009 Bulletin 2009/43

(21) Application number: 08772573.5

(22) Date of filing: 07.01.2008
(51) International Patent Classification (IPC): 
C07D 207/06(2006.01)
C07D 405/06(2006.01)
 C07D 307/79(2006.01)
(86) International application number:
PCT/US2008/050388
(87) International publication number:
WO 2008/100651 (21.08.2008 Gazette 2008/34)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

(30) Priority: 05.01.2007 IN CH00342007
14.03.2007 US 894711 P
13.09.2007 IN CH20602007

(71) Applicants:
  • Dr. Reddy's Laboratories Ltd.
    Hyderabad 500 016 Andhra Pradesh (IN)
  • Dr. Reddy's Laboratories, Inc.
    Bridgewater, NJ 08807 (US)

(72) Inventors:
  • KATKAM, Srinivas
    Secunderabad, 500 047 Andhra Pradesh (IN)
  • VADDADI, Pattabhiramayya
    Hyderabad, 500 047 Andhra Pradesh (IN)
  • SUNKARA, Vishnuvardhan
    Hyderabad, 500 013 Andhra Pradesh (IN)
  • MUTTAVARAPU, Muralimohan
    Krishna, 521 185 Andhra Pradesh (IN)
  • KULKARNI, Lalitha Dattatray
    Pune, 411 041 Maharastra (IN)
  • SAGYAM, Rajeshwar, Reddy
    Hyderabad, 500 072 Andhra Pradesh (IN)
  • PITTA, Jaya, Prakash
    Warangal, 506 002 Andhra Pradesh (IN)
  • BUCHNIKONDA, Ravinder
    Hyderabad, 500 018 Andhra Pradesh (IN)
  • MUNAGALA, Sridhar
    Hyderabad, 500 072 Andhra Pradesh (IN)

(74) Representative: Bates, Philip Ian 
Reddie & Grose 16 Theobalds Road
London WC1X 8PL
London WC1X 8PL (GB)

   


(54) PREPARATION OF DARIFENACIN AND ITS SALTS