Patents Assigned to Ragatives, S.L.
  • Process for obtaining 4-(N-alkylamino)-5,6-dihydro-4H-thien-(2,3-b)-thiopyran-2-sulfonamide-7,7-dioxides and intermediates
    Patent number: 7030250
    Abstract: The process for obtaining 4-(N-alkylamino)-5,6-dihydro-4H-thien-(2,3-b)-thiopyran-2-sulfonamide-7,7-dioxides (I) wherein R1 is H or C1-5 alkyl, and R2 is C1-5 alkyl, starts from the corresponding 4-(N-alkylamino)-5,6-dihydro-4H-thien-(2,3-b)-thiopyran-7,7-dioxides, and comprises protecting the alkylamine group, introducing a sulfonamide group and eliminating protecting group.
    Type: Grant
    Filed: March 3, 2003
    Date of Patent: April 18, 2006
    Assignee: Ragatives, S.L.
    Inventors: Pablo García Losada, Luis Octavio Silva Guisasola, Antonio Lorente Bonde-Larsen, Jorge Martín Juárez