Patents by Inventor Chengxin Zhi

Chengxin Zhi 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).

  • Patent number: 6777420
    Abstract: The invention provides heterocyclic organic compounds that inhibit bacterial DNA polymerase IIIC and type II bacterial topoisomerase. The invention further provides compounds that are useful as intermediates in the synthesis of such heterocyclic organic compounds. Syntheses and uses of such heterocyclic organic molecules are also described.
    Type: Grant
    Filed: June 17, 2002
    Date of Patent: August 17, 2004
    Assignee: Microbiotix, Inc.
    Inventors: Chengxin Zhi, George E. Wright
  • Publication number: 20030181719
    Abstract: The invention provides heterocyclic organic compounds that inhibit bacterial DNA polymerase IIIC and type II bacterial topoisomerase. The invention further provides compounds that are useful as intermediates in the synthesis of such heterocyclic organic compounds. Syntheses and uses of such heterocyclic organic molecules are also described.
    Type: Application
    Filed: June 17, 2002
    Publication date: September 25, 2003
    Inventors: Chengxin Zhi, George E. Wright
  • Publication number: 20030114414
    Abstract: Methods of preparing N3-substituted-4-pyrimidones are disclosed. The methods include combining a 4-pyrimidone and a non-aqueous base, followed by an alkylating agent, for a time sufficient for the pyrimidone and the alkylating agent to react. Methods of preparing an N3-substituted-6-(substituted amino)uracil are also disclosed. The methods include (a) combining an N3-substituted-2-alkoxy-6-amino-4-pyrimidone with an amine compound selected from the group consisting of an amine salt and the corresponding free amine, to form a reaction mixture; and (b) heating the reaction mixture to at least 80° C. for a time sufficient for the N3-substituted-2-alkoxy-6-amino-4-pyrimidone and the amine compound to react to form the final product.
    Type: Application
    Filed: June 17, 2002
    Publication date: June 19, 2003
    Inventors: Chengxin Zhi, Zheng-Yu Long, Andrzej Manikowski, George E. Wright
  • Publication number: 20030114445
    Abstract: Compounds useful for treating Gram-positive bacterial and mycoplasmal infections are disclosed. The compounds have the general formulae shown below.
    Type: Application
    Filed: June 17, 2002
    Publication date: June 19, 2003
    Inventors: Chengxin Zhi, Zheng-Yu Long, George E. Wright, Neal C. Brown, Serge Lamothe, Irina Motorina
  • Patent number: 6448256
    Abstract: The invention relates to prodrugs of N-substituted derivatives of 6-aminouracils, 6-aminoisocytosines, guanines, and 2-aminoadenines. The N-linked substituents include an ester group that is cleaved upon administration into a subject to yield a substituent having a terminal hydroxyl group. Pharmaceutical compositions including these compounds, and methods for treating Gram-positive bacterial infections using these compounds, are also disclosed.
    Type: Grant
    Filed: May 23, 2000
    Date of Patent: September 10, 2002
    Assignee: University of Massachusetts
    Inventors: George E. Wright, Neal C. Brown, Chengxin Zhi