Patents by Inventor Yaohui Lei

Yaohui Lei 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).

  • Publication number: 20090131304
    Abstract: Semi-synthetic glycopeptides that have antibacterial activity are based on modifications of the desmethyl-vancomycin scaffold, in particular, acylation of the amino substituent on the amino-substituted sugar moiety on this scaffold with certain acyl groups; and/or conversion of the acid moiety on the macrocyclic ring of this scaffolds to certain substituted amides. In addition, compounds of the invention include desmethyl-vancomycin scaffolds on which the acid moiety on the macrocyclic ring is converted to certain substituted amides and the amino substituent on the amino-substituted sugar moiety is alkylated with certain alkyl groups. Also provided are methods for synthesis of the compounds, pharmaceutical compositions containing the compounds, and methods of use of the compounds for the treatment and/or prophylaxis of diseases, especially bacterial infections.
    Type: Application
    Filed: November 10, 2008
    Publication date: May 21, 2009
    Applicant: Novartis Vaccines and Diagnostics, Inc.
    Inventors: Daniel Chu, Yaohui Lei, Yu Bai, Zhi-Jie Ni, John Jian-Xin Wang
  • Publication number: 20080214444
    Abstract: Semi-synthetic glycopeptides that have antibacterial activity are based on modifications of a rearranged vancomycin or desmethyl-vancomycin scaffold, in particular, alkylation or acylation of the amino substituent on the amino-substituted sugar moiety on this scaffold with certain acyl groups; and/or conversion of the acid moiety on the macrocyclic ring of this scaffolds to certain substituted amides. Also provided are methods for synthesis of the compounds, pharmaceutical compositions containing the compounds, and methods of use of the compounds for the treatment and/or prophylaxis of diseases, especially bacterial infections.
    Type: Application
    Filed: March 5, 2008
    Publication date: September 4, 2008
    Applicant: NOVARTIS VACCINES AND DIAGNOSTICS, INC.
    Inventors: Yaohui Lei, Yu Bai, Daniel Chu, Zhi-Jie Ni, John Jian-Xin Wang
  • Patent number: 7368422
    Abstract: Semi-synthetic glycopeptides that have antibacterial activity are based on modifications of a rearranged vancomycin or desmethyl-vancomycin scaffold, in particular, alkylation or acylation of the amino substituent on the amino-substituted sugar moiety on this scaffold with certain acyl groups; and/or conversion of the acid moiety on the macrocyclic ring of this scaffolds to certain substituted amides. Also provided are methods for synthesis of the compounds, pharmaceutical compositions containing the compounds, and methods of use of the compounds for the treatment and/or prophylaxis of diseases, especially bacterial infections.
    Type: Grant
    Filed: February 24, 2006
    Date of Patent: May 6, 2008
    Assignee: Novartis Vaccines and Diagnostics Inc.
    Inventors: Yaohui Lei, Yu Bai, Daniel Chu, Zhi-Jie Ni, John Jian-Xin Wang
  • Publication number: 20070185015
    Abstract: Semi-synthetic glycopeptides that have antibacterial activity are based on modifications of the desmethyl-vancomycin scaffold, in particular, acylation of the amino substituent on the amino-substituted sugar moiety on this scaffold with certain acyl groups; and/or conversion of the acid moiety on the macrocyclic ring of this scaffolds to certain substituted amides. In addition, compounds of the invention include desmethyl-vancomycin scaffolds on which the acid moiety on the macrocyclic ring is converted to certain substituted amides and the amino substituent on the amino-substituted sugar moiety is alkylated with certain alkyl groups. Also provided are methods for synthesis of the compounds, pharmaceutical compositions containing the compounds, and methods of use of the compounds for the treatment and/or prophylaxis of diseases, especially bacterial infections.
    Type: Application
    Filed: February 24, 2006
    Publication date: August 9, 2007
    Inventors: Daniel Chu, Yaohui Lei, Yu Bai, Zhi-Jie Ni, John Wang
  • Publication number: 20070021328
    Abstract: Semi-synthetic glycopeptides that have antibacterial activity are based on modifications of a rearranged vancomycin or desmethyl-vancomycin scaffold, in particular, alkylation or acylation of the amino substituent on the amino-substituted sugar moiety on this scaffold with certain acyl groups; and/or conversion of the acid moiety on the macrocyclic ring of this scaffolds to certain substituted amides. Also provided are methods for synthesis of the compounds, pharmaceutical compositions containing the compounds, and methods of use of the compounds for the treatment and/or prophylaxis of diseases, especially bacterial infections.
    Type: Application
    Filed: February 24, 2006
    Publication date: January 25, 2007
    Inventors: Yaohui Lei, Yu Bai, Daniel Chu, Zhi-Jie Ni, John Wang