Patents Assigned to Avrobindo Pharma Ltd.
  • Process for preparing tamsulosin hydrochloride
    Patent number: 8273918
    Abstract: The invention relates to an process for preparing Tamsulosin hydrochloride of Formula (I) which comprises (i) reacting (R)-(?)-5-(2-amino-propyl)-2-methoxybenzenesulfonamide of Formula (II) with substituted phenoxy compound of Formula (III), wherein Z represents a removing group, such as —OSO2CH3, —OSO2C6H4CH3, —F, —Br, —Cl, or —I, in a solvent in the presence of an alkaline earth metal oxide to obtain Tamsulosin base and (ii) converting Tamsulosin base into hydrochloride salt in a solvent by addition of aqueous hydrochloric acid.
    Type: Grant
    Filed: August 10, 2006
    Date of Patent: September 25, 2012
    Assignee: Avrobindo Pharma Ltd.
    Inventors: Anand Gopalkrishna Kamat, Narsimha Reddy Penthala, Sivakumaran Meenakshisunderam