Patents by Inventor Pravin R. Likhar

Pravin R. Likhar 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).

  • Two Component Recyclable Heterogeneous Catalyst, Process for Preparation Thereof and its Use for Preparation of Amines
    Publication number: 20110313158
    Abstract: The invention describes the development of highly efficient, recyclable two component system, CuAl-hydrotalcite/rac 1,1?-Binaphthalene-2,2?-diol catalytic system for the N-alkylation of electron deficient aryl chlorides in presence of potassium carbonate as a base at room temperature in 3-6 h, wherein the process is provided for the preparation of various secondary amines via C—N coupling reaction of aliphatic amines(aliphatic open chain, acyclic, benzyl amines and heterocyclic amines) with various aryl chlorides.
    Type: Application
    Filed: February 26, 2010
    Publication date: December 22, 2011
    Inventors: Pravin R. Likhar, R. Arundhati, M. Lakshmi Kantam
  • Process for the synthesis of N-Substituted ?-amino nitriles through the ring opening of aziridines
    Patent number: 6906216
    Abstract: The present invention comprises the simultaneous ring opening and concomitant N-substitution of various N-tosyl aziridines with different aliphatic and aromatic nitriles in presence of catalytic amount of metal triflates to afford different N-substituted ?-amino nitriles in excellent yields and selectivities.
    Type: Grant
    Filed: November 29, 2002
    Date of Patent: June 14, 2005
    Assignee: Council of Scientific and Industrial Research
    Inventors: Boyapati Manoranjan Choudary, Jeyalakshmi Kulandaivelu, Pravin R. Likhar, Lakshmi Kantam Mannepalli, Sreedhar Bojja, Bhanuprakash Kotamarthi, Sitha Sanyasi
  • Process for the synthesis of N-substituted beta-amino nitriles through the ring opening of aziridines
    Publication number: 20040198999
    Abstract: The present invention comprises the simultaneous ring opening and concomitant N-substitution of various N-tosyl aziridines with different aliphatic and aromatic nitrites in presence of catalytic amount of metal triflates to afford different N-substituted &bgr;-amino nitrites in excellent yields and selectivities.
    Type: Application
    Filed: November 29, 2002
    Publication date: October 7, 2004
    Inventors: Boyapati Manoranjan Choudary, Jeyalakshmi Kulandaivelu, Pravin R. Likhar, Lakshmi Kantam Mannepalli, Sreedhar Bojja, Bhanuprakash Kotamarthi, Sitha Sanyasi