Patents by Inventor Yanzhong Wu

Yanzhong Wu 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: 6951955
    Abstract: The invention is a process for the preparation of compounds of the Formula I: where R1, R2, R3, R4 and R5 are defined in the specification, which are intermediates useful for the preparation of tubulin inhibitors which are useful in the treatment of cancer.
    Type: Grant
    Filed: September 18, 2003
    Date of Patent: October 4, 2005
    Assignee: Wyeth Holdings Corporation
    Inventors: Yanzhong Wu, Sreenivasulu Megati, Constantine Gletsos, John Thomas Kendall, Bogdan Kazimierz Wilk, Thurairajah Padmanathan, Panolil Raveendranath
  • Publication number: 20050159613
    Abstract: A process for making a compound of formula (I) in which process the compound HC?C—(CH2)n—NH2 is reacted with the compound R1—SO2Cl to produce an intermediate compound, which intermediate compound is then reacted with the compound of formula to produce the compound of formula (I), and compounds produced by the process of this invention. The terms R1, R2, R3, R4 and n have the definitions set forth in the specification.
    Type: Application
    Filed: March 8, 2005
    Publication date: July 21, 2005
    Applicant: Wyeth
    Inventors: Yanzhong Wu, Panolil Raveendranath
  • Publication number: 20050124635
    Abstract: The present invention provides a process for the preparation of 6-[(substituted)phenyl]-triazolopyrimidine dicarboxylic acid salt and as a hydrated salt having the structural formula (I) wherein: R1 is CF3 or C2F5; R2 is H or C1-C3 alkyl; n is an integer of 2, 3, or 4; X is Cl or Br; R3 and R4 are each independently H or C1-C3 alkyl; or R3 and R4 when optionally taken together with the nitrogen atom to which each is attached form a 4 to 6 membered saturated heterocyclic ring having 1-2 nitrogen atoms and 0-1 oxygen atoms or 0-1 sulfur atoms, and optionally substituted with R5; R5 is C1-C3 alkyl; wherein the dotted line is an optional bond.
    Type: Application
    Filed: December 8, 2004
    Publication date: June 9, 2005
    Applicant: Wyeth
    Inventors: Yanzhong Wu, Jean Schmid, Jay Afragola, David Blum, Semiramis Ayral-Kaloustian
  • Publication number: 20050124806
    Abstract: There is provided a process for the preparation of substituted amino alcohols HO—(CH2)n—NR1R2 from haloalcohols HO—(CH2)n—X, where X is Cl, Br or I, by reaction with an amine HNR1R2, in water as solvent at a temperature range of about 20° C. to about 90° C. optionally in the presence of a catalytic amount of an iodide source metal iodides. The haloalcohols are useful in the preparation of 6-[(substituted)phenyl]-triazolopyrimidine compounds which are useful in the treatment of cancer.
    Type: Application
    Filed: December 8, 2004
    Publication date: June 9, 2005
    Applicant: Wyeth
    Inventors: Yanzhong Wu, Arkadiy Rubezhov, Jean Schmid, Jay Afragola
  • Publication number: 20050107618
    Abstract: The present invention describes a process for preparing N-substituted phthalimides of Formula I which are widely useful as intermediates in the preparation of organic compounds such as pharmaceuticals.
    Type: Application
    Filed: November 16, 2004
    Publication date: May 19, 2005
    Applicant: Wyeth
    Inventors: Yanzhong Wu, Panolil Raveendranath
  • Patent number: 6891065
    Abstract: A process for making a compound of formula (I) in which process the compound HC?C—(CH2)n—NH2 is reacted with the compound R1—SO2Cl to produce an intermediate compound, which intermediate compound is then reacted with the compound of formula to produce the compound of formula (I), and compounds produced by the process of this invention. The terms R1, R2, R3, R4 and n have the definitions set forth in the specification.
    Type: Grant
    Filed: July 21, 2004
    Date of Patent: May 10, 2005
    Assignee: Wyeth
    Inventors: Yanzhong Wu, Panolil Raveendranath
  • Publication number: 20050090508
    Abstract: This invention relates to certain 6-[(substituted)phenyl]triazolopyrimidine compounds or pharmaceutically acceptable salts thereof, and compositions containing said compounds or pharmaceutically acceptable salts thereof, wherein said compounds are anti-cancer agents useful for the treatment of cancer in mammals. This invention further relates to a method of treating or inhibiting the growth of cancerous tumor cells and associated diseases in a mammal and further provides a method for the treatment or prevention of cancerous tumors that express multiple drug resistance (MDR) or are resistant because of MDR, in a mammal in need thereof which method comprises administering to said mammal an effective amount of said compounds or pharmaceutically acceptable salts thereof.
    Type: Application
    Filed: September 24, 2004
    Publication date: April 28, 2005
    Applicant: Wyeth Holdings Corporation
    Inventors: Nan Zhang, Semiramis Ayral-Kaloustian, Thai Nguyen, Yanzhong Wu, Wei Tong
  • Publication number: 20050084334
    Abstract: An alternative cover for landfill may be formed from a slurry mixture of water, cementitious binder, adhesion enhancing admixture and fiber. These constituents may be mixed and applied to cover landfilled wastes, granular material piles or for soil erosion control. The cover will harden to minimize water infiltration, wind blown dust, odor and affinity to birds, flies and other insects. The water may include tap water, landfill leachate and wastewater. The binder may include Portland cement, blended cement, cement kiln dust, class C fly ash, and/or calcium sulphate hemihydrate. The adhesion enhancing admixture includes water-dispersible polymers. The fibers may comprise shredded paper or wood or plastic fibers.
    Type: Application
    Filed: October 20, 2003
    Publication date: April 21, 2005
    Inventors: Caijun Shi, Yanzhong Wu
  • Publication number: 20050054870
    Abstract: A process for making a compound of formula I and intermediate compounds thereof, wherein R1 is CN, F or Cl; R2 is H or Br; and R3 and R4 are each independently H or F. The compounds of formula I are useful in the treatment of chronic inflammatory diseases, such as rheumatoid arthritis.
    Type: Application
    Filed: September 1, 2004
    Publication date: March 10, 2005
    Applicant: Wyeth
    Inventors: Yanzhong Wu, Jianxin Ren, Mousumi Ghosh, Mahmut Levent, Karen Sutherland, Panolil Raveendranath
  • Publication number: 20050020858
    Abstract: A process for making a compound of formula (I) in which process the compound HC?C—(CH2)n—NH2 is reacted with the compound R1—SO2Cl to produce an intermediate compound, which intermediate compound is then reacted with the compound of formula to produce the compound of formula (I), and compounds produced by the process of this invention. The terms R1, R2, R3, R4 and n have the definitions set forth in the specification.
    Type: Application
    Filed: July 21, 2004
    Publication date: January 27, 2005
    Applicant: Wyeth
    Inventors: Yanzhong Wu, Panolil Raveendranath
  • Publication number: 20040063904
    Abstract: The invention is a process for the preparation of compounds of the Formula I: 1
    Type: Application
    Filed: September 18, 2003
    Publication date: April 1, 2004
    Applicant: Wyeth Holdings Corporation
    Inventors: Yanzhong Wu, Sreenivasulu Megati, Constantine Gletsos, John Thomas Kendall, Bogdan Kazimierz Wilk, Thurairajah Padmanathan, Panolil Raveendranath
  • Publication number: 20020117086
    Abstract: An economical structural cellular lightweight concrete with a density of from about 45 lb/ft3 to about 90 lb/ft3 and a strength from about 1,000 psi to about 6,000 psi after 28 days of curing at room temperature and with minimal shrinkage on drying, is described. The concrete comprises cement, lightweight aggregate with a density from about 25 lb/ft3 to about 60 lb/ft3, fiber, superplastizer, gas and/or foaming agents, and a shrinkage reducing agent. The concrete can be manufactured using facilities for conventional concrete even with a portion of Portland cement replaced by industrial by-products or recycled materials such as blast furnace slag, coal fly ash and recycled glasses. The preferred procedure for making the lightweight concrete is also described. The products made with the lightweight concrete have much better ductility and construction capabilities than conventional concrete products.
    Type: Application
    Filed: January 16, 2002
    Publication date: August 29, 2002
    Inventors: Caijun Shi, Yanzhong Wu, Monte Riefler