Patents by Inventor Ragavendra Kumar Panchangam

Ragavendra Kumar Panchangam 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).

  • Method For The Preparation Of Cinacalcet And Intermediates And Impurities Thereof
    Publication number: 20110319663
    Abstract: A method for the preparation of Cinacalcet is disclosed comprising treating (R)-1-naphthyl ethylamine with an aromatic aldehyde to form (1R)-1-(2-naphthyl)-N-(aryl methylene)ethanamine derivative of Formula (IV), which is further treated with 1-(3-halopropyl)-3-(trifluoromethyl)benzene of Formula (V) to obtain an iminium salt of Formula (VI), followed by hydrolysis to obtain Cinacalcet free base.
    Type: Application
    Filed: September 6, 2011
    Publication date: December 29, 2011
    Applicant: Amneal Pharmaceuticals, LLC
    Inventors: Vijayvitthal Thippannachar Mathad, Navnath Chintaman Niphade, Gorakshanath Balasaheb Shinde, Sharad Subhash Ippar, Shrikant Prataprao Deshmukh, Ragavendra Kumar Panchangam