Patents by Inventor Azad Hossain

Azad Hossain 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 preparing macrocyclic compounds
    Patent number: 8222369
    Abstract: Disclosed is a process for preparing a macrocyclic compound of the formula (I) wherein a hydroxyl-substituted macrocyclic compound of formula (3) is reacted with a sulfonyl-substituted compound of formula QUIN: The compounds of formula (I) are potent active agents for the treatment of hepatitis C virus (HCV) infection.
    Type: Grant
    Filed: September 2, 2009
    Date of Patent: July 17, 2012
    Assignee: Boehringer Ingelheim International GmbH
    Inventors: Carl Alan Busacca, Fabrice Gallou, Nizar Haddad, Azad Hossain, Suresh R. Kapadia, Jianxiu Liu, Chris H. Senanayake, Xudong Wei, Nathan K. Yee
  • PROCESS FOR PREPARING MACROCYCLIC COMPOUNDS
    Publication number: 20090326194
    Abstract: Disclosed is a process for preparing a macrocyclic compound of the formula (I) wherein a hydroxyl-substituted macrocyclic compound of formula (3) is reacted with a sulfonyl-substituted compound of formula QUIN: The compounds of formula (I) are potent active agents for the treatment of hepatitis C virus (HCV) infection.
    Type: Application
    Filed: September 2, 2009
    Publication date: December 31, 2009
    Applicant: Boehringer Ingelheim International GmbH
    Inventors: Carl Alan BUSACCA, Fabrice GALLOU, Nizar HADDAD, Azad HOSSAIN, Suresh R. KAPADIA, Jianxiu LIU, Chris SENANAYAKE, Xudong WEI, Nathan K. YEE
  • Process for preparing macrocyclic compounds
    Patent number: 7608614
    Abstract: Intermediates of the formula QUIN: and methods for their preparation are described. The intermediate compounds are useful for preparing active agents for the treatment of hepatitis C virus (HCV) infection.
    Type: Grant
    Filed: March 6, 2006
    Date of Patent: October 27, 2009
    Assignee: Boehringer Ingelheim International GmbH
    Inventors: Carl Alan Busacca, Fabrice Gallou, Nizar Haddad, Azad Hossain, Suresh R. Kapadia, Jianxiu Liu, Chris Senanayake, Xudong Wei, Nathan K. Yee
  • Method for the preparation of fluticasone and related 17?-carbothioic esters using a novel carbothioic acid synthesis and novel purification methods
    Patent number: 7214807
    Abstract: This invention discloses a novel method for the conversion of carboxylic acids to carbothioic acids and application of the method to the preparation of androstane carbothiolates, such as fluticasone propionate, which avoids column chromatography.
    Type: Grant
    Filed: May 18, 2004
    Date of Patent: May 8, 2007
    Assignee: Abbott Laboratories
    Inventors: Jufang Barkalow, Steven A. Chamberlin, Arthur J. Cooper, Azad Hossain, John J. Hufnagel, Denton Langridge
  • PROCESS FOR PREPARING MACROCYCLIC COMPOUNDS
    Publication number: 20060205638
    Abstract: Disclosed is a process for preparing a macrocyclic compound of the formula (I) wherein a hydroxyl-substituted macrocyclic compound of formula (3) is reacted with a sulfonyl-substituted compound of formula QUIN: The compounds of formula (I) are potent active agents for the treatment of hepatitis C virus (HCV) infection.
    Type: Application
    Filed: March 6, 2006
    Publication date: September 14, 2006
    Applicant: Boehringer Ingelheim International GmbH
    Inventors: Carl Busacca, Fabrice Gallou, Nizar Haddad, Azad Hossain, Suresh Kapadia, Jianxiu Liu, Chris Senanayake, Xudong Wei, Nathan Yee
  • Method for the preparation of fluticasone and related 17beta-carbothioic esters using a novel carbothioic acid synthesis and novel purification methods
    Publication number: 20040209854
    Abstract: This invention discloses a novel method for the conversion of carboxylic acids to carbothioic acids and application of the method to the preparation of androstane carbothiolates, such as fluticasone propionate, which avoids column chromatography.
    Type: Application
    Filed: May 18, 2004
    Publication date: October 21, 2004
    Inventors: Jufang Barkalow, Steven A. Chamberlin, Arthur J. Cooper, Azad Hossain, John J. Hufnagel, Denton Langridge
  • Method for the preparation of fluticasone and related 17beta-carbothioic esters using a novel carbothioic acid synthesis and novel purification methods
    Publication number: 20020133032
    Abstract: This invention discloses a novel method for the conversion of carboxylic acids to carbothioic acids and application of the method to the preparation of androstane carbothiolates, such as fluticasone propionate, which avoids column chromatography.
    Type: Application
    Filed: February 25, 2000
    Publication date: September 19, 2002
    Inventors: Jufang Barkalow, Steven A. Chamberlin, Arthur J. Cooper, Azad Hossain, John J. Hufnagel, Denton Langridge
  • Process for producing 13-cis retinoic acid
    Publication number: 20010018533
    Abstract: The process of the present invention relates to a process for producing 1 3-cis retinoic acid. The process of the present invention involves reacting a Wittig salt in a solvent with a butenolide in the presence of a weak base and optionally, a Lewis acid.
    Type: Application
    Filed: January 18, 2000
    Publication date: August 30, 2001
    Inventors: Xiu C. Wang, Ashok V. Bhatia, Azad Hossain, Timothy B. Towne
  • Process for producing 13-cis retinoic acid
    Patent number: 6124485
    Abstract: The process of the present invention relates to a process for producing 1 3-cis retinoic acid. The process of the present invention involves reacting a Wittig salt in a solvent with a butenolide in the presence of a weak base and a Lewis acid.
    Type: Grant
    Filed: March 25, 1998
    Date of Patent: September 26, 2000
    Assignee: Abbott Laboratories
    Inventors: Xiu C. Wang, Ashok V. Bhatia, Azad Hossain, Timothy B. Towne