Patents by Inventor Ramana Nittala Venkata

Ramana Nittala Venkata has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • A Process for the Preparation of R-(-)-N, Alpha-Dimethylphenethylamine (Levmethamfetamine) or S-(+)-N, Alpha-Dimethylphenethylamine (Methamphetamine) from D-Ephendrine, or L-Ephedrine Respectively
    Publication number: 20080293971
    Abstract: A process for synthesis of R-(?)-N,?-Dimethylphenethylamine (Levmetamfetamine, formula I), or S-(+)-N,?-Dimethyl phenethylamine (Methamphetamine, formula II), from d-ephedrine of formula III or l-ephedrine formula IV, the process comprising the steps of (a) acylating the d- or l-ephedrine base of formula III or formula IV with an acylating agent to make a reaction mixture containing a N-acylated ephedrines of formula V or formula VI; (b) deoxygenation of N-acylated ephedrines to make the compound of the formula VII or Formula VIII by using Raney Nickel catalyst; and (c) acid hydrolysis of the above deoxygenated products to get the levmetamfetamine or methamphetamine.
    Type: Application
    Filed: December 22, 2004
    Publication date: November 27, 2008
    Applicant: EMMELLEN BIOTECH PHARMACEUTICALS LIMITED
    Inventors: Subrahmanyam Gollapudy, Ramana Nittala Venkata