Patents by Inventor Ashish A. Soni

Ashish A. Soni 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).

  • Process for the preparation of indocyanine green
    Patent number: 10287436
    Abstract: The present invention involves an improved process for the preparation of Indocyanine green of Formula (I) having high purity of about 99%, wherein the process comprises steps of reacting 1,1,2-trimethyl-1H-benzo[e]indole with 1,4-butane sulfone in boiling solvent to give 4-(1,1,2-trimethyl-1H-benzo[e]indolium-3-yl)butane-1-sulfonate. Followed by reacting 4-(1,1,2-trimethyl-1H-benzo[e]indolium-3-yl)butane-1-sulfonate of Formula (IV) and N-phenyl-N-((1E,3E,5E)-5-(phenylimino)penta-1,3-dienyl)acetamide of formula (V) in presence of sodium acetate and alcohol; and extracting the title compound formula (I) with an ester solvent.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: May 14, 2019
    Assignee: DISHMAN CARBOGEN AMCIS LIMITED
    Inventors: Janmejay Rajnikant Vyas, Himani Dhotre, Narasimha Sarma, Babulal R. Patel, Dinesh Kumar Sharma, Dilip N. Patel, Ashish A. Soni
  • PROCESS FOR THE PREPARATION OF INDOCYANINE GREEN
    Publication number: 20180346728
    Abstract: The present invention involves an improved process for the preparation of Indocyanine green of Formula (I) having high purity of about 99%, wherein the process comprises steps of reacting 1,1,2-trimethyl-1H-benzo[e]indole with 1,4-butane sulfone in boiling solvent to give 4-(1,1,2-trimethyl-1H-benzo[e]indolium-3-yl)butane-1-sulfonate. Followed by reacting 4-(1,1,2-trimethyl-1H-benzo[e]indolium-3-yl)butane-1-sulfonate of Formula (IV) and N-phenyl-N-((1E,3E,5E)-5-(phenylimino)penta-1,3-dienyl)acetamide of formula (V) in presence of sodium acetate and alcohol; and extracting the title compound formula (I) with an ester solvent.
    Type: Application
    Filed: November 29, 2016
    Publication date: December 6, 2018
    Applicant: DISHMAN PHARMACEUTICALS AND CHEMICALS LIMITED
    Inventors: Janmejay Rajnikant Vyas, Himani Dhotre, Narasimha Sarma, Babulal R. Patel, Dinesh Kumar Sharma, Dilip N. Patel, Ashish A. Soni