(19)
(11) EP 2 121 663 A2

(12)

(88) Date of publication A3:
25.09.2008

(43) Date of publication:
25.11.2009 Bulletin 2009/48

(21) Application number: 07859030.4

(22) Date of filing: 10.12.2007
(51) International Patent Classification (IPC): 
C07D 403/06(2006.01)
(86) International application number:
PCT/IB2007/003896
(87) International publication number:
WO 2008/075163 (26.06.2008 Gazette 2008/26)
(84) Designated Contracting States:
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 States:
AL BA HR MK RS

(30) Priority: 15.12.2006 IN CH23362006

(71) Applicant: Aurobindo Pharma Limited
Andhra Pradesh Hyderabad 500038 (IN)

(72) Inventors:
  • KOILPILLAI, Joseph Prabahar
    Hyderabad 500038 (IN)
  • SUBRAMANIAN, Magesh
    Hyderabad 500038 (IN)
  • MALLELA, Uppalaiah
    Hyderabad 500038 (IN)
  • BODDU, Venkata Balaji
    Hyderabad 500038 (IN)
  • DANDALA, Ramesh
    Hyderabad 500038 (IN)
  • MEENAKSHISUNDERAM, Sivakumaran
    Hyderabad 500038 (IN)

(74) Representative: Wittkopp, Alexander 
Maiwald Patentanwalts GmbH Jungfernstieg 38
20354 Hamburg
20354 Hamburg (DE)

   


(54) AN IMPROVED PROCESS FOR THE PREPARATION OF RIZATRIPTAN