Patents Assigned to Esteve Quimica, SA
  • Process for the preparation of abacavir
    Patent number: 8183370
    Abstract: Process for removal of the amino protective group of a N-acylated {(1S,4R)-4-[2-amino-6-(cyclopropylamino)-9H-purin-9-yl]-cyclopent-2-enyl}methanol of formula (II) where R?H or a (C1-C4)-alkyl, using an inorganic base in a mixture of water and alcohol, to yield abacavir or its salts. The process proceeds very fast and the product can be obtained in high yield and purity.
    Type: Grant
    Filed: September 27, 2007
    Date of Patent: May 22, 2012
    Assignee: Esteve Quimica, SA
    Inventors: Jorge Medrano Rupérez, Julio Campon Pardo, Laia Elías Rius, Ramón Berenguer Maimó
  • Crystalline forms of meloxicam and processes for their preparation and interconversion
    Patent number: 6967248
    Abstract: The invention relates to the new crystalline forms II, III and V of meloxicam; to the processes for obtaining the crystalline forms I, II, III and V; and, finally, to the interconversion processes of the forms II, III, IV and V into the form I.
    Type: Grant
    Filed: December 9, 2002
    Date of Patent: November 22, 2005
    Assignee: Esteve Quimica, SA
    Inventors: Laura Coppi, Marti Bartra Sanmarti, Montserrat Closa Clavo