Patents by Inventor Zejun Xiao

Zejun Xiao 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: 7759488
    Abstract: Disclosed herein are novel platinum-based analogs with a single substituted azole ligand: RN?NR7, wherein the RN?NR7 functional group is covalently bonded to the platinum through nitrogen of NR7. The analogs also have nitrogen donor ligands capable of forming hydrogen bonds with the bases in DNA or RNA, and one or more leaving groups which can be displaced by water, hydroxide ions or other nucleophiles, which is thought to form active species in vivo, and then, form cross-linked complexes between nucleic acid strands, principally between purines in DNA (or RNA), i.e., at the Guanine or Adenine bases, thereof.
    Type: Grant
    Filed: January 26, 2006
    Date of Patent: July 20, 2010
    Assignee: BioNumerik Pharmaceuticals, Inc.
    Inventors: Zejun Xiao, Harry Kochat, Frederick H. Hausheer
  • Patent number: 7569606
    Abstract: Disclosed herein are novel platinum-based complexes possessing one nitrile substituent group (mononitrile) covalently-bonded to the platinum, one or more nitrogen donor ligands capable of forming hydrogen bonds with the bases in DNA or RNA and leaving groups (i.e., L1 and L2 )which can be hydrolyzed iii vivo to active species, which can then form coordinate adducts with DNA or RNA at the Guanine or Adenine bases thereof. Also disclosed herein are the reaction schemes for the synthesis of said platinum complexes, as well as methods of treatment of various types of cancer by the administration of a pharmaceutically-effective dose of said novel platinum complexes.
    Type: Grant
    Filed: April 17, 2006
    Date of Patent: August 4, 2009
    Assignee: BioNumerik Pharmaceuticals, Inc.
    Inventors: Zejun Xiao, Frederick H. Hausheer, Pavankumar Petluru
  • Patent number: 7268244
    Abstract: Disclosed herein are novel platinum-based analogs with a single substituted imine ligand: R7RC?NR8, wherein the R7RC?NR8 functional group is covalently bonded to the platinum through nitrogen. The analogs also have nitrogen donor ligands capable of forming hydrogen bonds with the bases in DNA or RNA, and one or more leaving groups which can be displaced by water, hydroxide ions or other nucleophiles, which is thought to form active species in vivo, and then, form cross-linked complexes between nucleic acid strands, principally between purines in DNA (or RNA), i.e., at the Guanine or Adenine bases, thereof.
    Type: Grant
    Filed: January 26, 2006
    Date of Patent: September 11, 2007
    Assignee: BioNumerik Pharmaceuticals, Inc.
    Inventors: Frederick H. Hausheer, Zejun Xiao, Harry Kochat
  • Publication number: 20070173485
    Abstract: Disclosed herein are novel platinum-based complexes possessing one nitrile substituent group (mononitrile) covalently-bonded to the platinum, one or more nitrogen donor ligands capable of forming hydrogen bonds with the bases in DNA or RNA and leaving groups (i.e., L1 and L2 )which can be hydrolyzed iii vivo to active species, which can then form coordinate adducts with DNA or RNA at the Guanine or Adenine bases thereof. Also disclosed herein are the reaction schemes for the synthesis of said platinum complexes, as well as methods of treatment of various types of cancer by the administration of a pharmaceutically-effective dose of said novel platinum complexes.
    Type: Application
    Filed: April 17, 2006
    Publication date: July 26, 2007
    Inventors: Zejun Xiao, Frederick Hausheer, Pavankumar Petluru
  • Patent number: 7238823
    Abstract: Disclosed herein are novel platinum-based complexes possessing one nitrile substituent group (mononitrile) covalently-bonded to the platinum, one or more nitrogen donor ligands capable of forming hydrogen bonds with the bases in DNA or RNA and leaving groups (i.e., L1 and L2) which can be hydrolyzed in vivo to active species, which can then form coordinate adducts with DNA or RNA at the Guanine or Adenine bases thereof. Also disclosed herein are the reaction schemes for the synthesis of said platinum complexes, as well as methods of treatment of various types of cancer by the administration of a pharmaceutically-effective dose of said novel platinum complexes.
    Type: Grant
    Filed: January 26, 2006
    Date of Patent: July 3, 2007
    Assignee: BioNumerik Pharmaceuticals, Inc.
    Inventors: Zejun Xiao, Frederick H. Hausheer, Pavankumar Petluru
  • Publication number: 20070004697
    Abstract: Disclosed herein are novel platinum-based analogs with a single substituted imine ligand: R7RC?NR8, wherein the R7RC?NR8 functional group is covalently bonded to the platinum through nitrogen. The analogs also have nitrogen donor ligands capable of forming hydrogen bonds with the bases in DNA or RNA, and one or more leaving groups which can be displaced by water, hydroxide ions or other nucleophiles, which is thought to form active species in vivo, and then, form cross-linked complexes between nucleic acid strands, principally between purines in DNA (or RNA), i.e., at the Guanine or Adenine bases, thereof.
    Type: Application
    Filed: January 26, 2006
    Publication date: January 4, 2007
    Inventors: Frederick Hausheer, Zejun Xiao, Harry Kochat
  • Publication number: 20070004798
    Abstract: Disclosed herein are novel platinum-based complexes possessing one nitrile substituent group (mononitrile) covalently-bonded to the platinum, one or more nitrogen donor ligands capable of forming hydrogen bonds with the bases in DNA or RNA and leaving groups (i.e., L1 and L2) which can be hydrolyzed in vivo to active species, which can then form coordinate adducts with DNA or RNA at the Guanine or Adenine bases thereof. Also disclosed herein are the reaction schemes for the synthesis of said platinum complexes, as well as methods of treatment of various types of cancer by the administration of a pharmaceutically-effective dose of said novel platinum complexes.
    Type: Application
    Filed: January 26, 2006
    Publication date: January 4, 2007
    Inventors: Zejun Xiao, Frederick Hausheer, Pavankumar Petluru
  • Publication number: 20070004696
    Abstract: Disclosed herein are novel platinum-based analogs with a single substituted azole ligand: RN?NR7, wherein the RN?NR7 functional group is covalently bonded to the platinum through nitrogen of NR7. The analogs also have nitrogen donor ligands capable of forming hydrogen bonds with the bases in DNA or RNA, and one or more leaving groups which can be displaced by water, hydroxide ions or other nucleophiles, which is thought to form active species in vivo, and then, form cross-linked complexes between nucleic acid strands, principally between purines in DNA (or RNA), i.e., at the Guanine or Adenine bases, thereof.
    Type: Application
    Filed: January 26, 2006
    Publication date: January 4, 2007
    Inventors: Zejun Xiao, Harry Kochat, Frederick Hausheer
  • Publication number: 20040092739
    Abstract: This invention relates to a process for synthesizing certain folic acid analogues, which are useful in treating cancer, inflammatory diseases, autoimmune diseases, and are commonly referred to as antifolates. The process employs improved steps for annulation, derivatization and addition reactions to produce the described antifolates from commonly available starting materials.
    Type: Application
    Filed: July 25, 2003
    Publication date: May 13, 2004
    Inventors: Zejun Xiao, Harry Kochat