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: 7754895
    Abstract: Processes for preparing oxindoles, which can be utilized in the preparation of a variety of useful compounds, and methods for minimizing or preventing N-alkylation of amide containing compounds, including oxindoles, are provided.
    Type: Grant
    Filed: July 27, 2006
    Date of Patent: July 13, 2010
    Assignee: Wyeth LLC
    Inventors: Yanzhong Wu, Bogdan Kazimierz Wilk, Zhixian Ding, Xinxu Shi, Charles Chao Wu, Panolil Raveendranath, Haris Durutlic
  • Patent number: 7557237
    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: Grant
    Filed: September 1, 2004
    Date of Patent: July 7, 2009
    Assignee: Wyeth
    Inventors: Yanzhong Wu, Jianxin Ren, Mousumi Ghosh, Mahmut Levent, Karen W. Sutherland, Panolil Raveendranath
  • Patent number: 7521552
    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: Grant
    Filed: December 8, 2004
    Date of Patent: April 21, 2009
    Assignee: Wyeth
    Inventors: Yanzhong Wu, Arkadiy Rubezhov, Jean Schmid, Jay Thomas Afragola
  • Patent number: 7507739
    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: Grant
    Filed: September 24, 2004
    Date of Patent: March 24, 2009
    Assignee: Wyeth
    Inventors: Nan Zhang, Semiramis Ayral-Kaloustian, Thai Nguyen, Yanzhong Wu, Wei Tong
  • Patent number: 7501423
    Abstract: The invention provides 6-chloro-5-{2,6-difluoro-4-[3-(methylamino)propoxy]phenyl}-2-pyrazin-2-yl-N-[(1S)-2,2,2-trifluoro-1-methylethyl]pyrimidin-4-amine hemifumarate which is a tubulin inhibitor useful in the treatment of cancer and processes of making said hemifumarate.
    Type: Grant
    Filed: June 4, 2007
    Date of Patent: March 10, 2009
    Assignee: Wyeth
    Inventors: David Michael Blum, Yanzhong Wu, Jean Schmid, Timothy John Doyle, Jay Thomas Afragola
  • Publication number: 20080319204
    Abstract: Processes for preparing substituted oxindole-2-ones, and specifically the following, are described, wherein R1-R4, R6, and n are defined herein. The processes include reacting a first alkali metal hydroxide, a tetraalkyl ammonium salt, a benzonitrile, and R6X or XCH2(CH2)nX?, wherein R6 is C1 to C6 alkyl, substituted C1 to C6 alkyl, C3 to C8 cycloalkyl, substituted C3 to C8 cycloalkyl, aryl, substituted aryl, heteroaryl, substituted heteroaryl, heterocyclic, or substituted heterocyclic, X and X? are, independently, leaving groups, and n is 1 to 5; (ii) reacting the product of step (i) with a second alkali metal hydroxide at a temperature of at least about 60° C.; (iii) reacting the product of step (ii) with an alkali alkoxide at a temperature of at least about 140° C. to form an oxindol-2-one; (iv) brominating the oxindol-2-one; and (v) coupling the brominated oxindol-2-one with a coupling reagent.
    Type: Application
    Filed: May 15, 2008
    Publication date: December 25, 2008
    Applicant: Wyeth
    Inventors: Yanzhong Wu, Karen Sutherland, John Leo Considine, Bogdan Kazimierz Wilk, Pierre Giguere, Michael MacEwan, Archana Sharma, Alexander Gontcharov
  • Publication number: 20080312306
    Abstract: Novel polymorph Form II and III, solvate Forms I, II, III, and IV, and the hydrate of 5-(4?-fluoro-2?-oxo-1?,2?-dihydrospiro[cyclopropane-1,3?-indol]-5?-yl)-1-methyl-1H-pyrrole-2-carbonitrile are provided, as are methods for preparing the same. Pharmaceutical compositions and kits containing these novel polymorphs, solvates, and hydrate, and combinations thereof are further provided, as are methods of contraception; treating or preventing fibroids, uterine leiomyomata, endometriosis, dysfunctional bleeding, polycystic ovary syndrome, hormone-dependent carcinomas; treating symptoms of premenstrual syndrome and premenstrual dysphoric disorder; providing hormone replacement therapy; stimulating food intake; synchronizing estrus; or treating symptoms of premenstrual syndrome using one or more of these polymorphs, solvates, or hydrate.
    Type: Application
    Filed: June 13, 2008
    Publication date: December 18, 2008
    Applicant: Wyeth
    Inventors: Mahmoud Mirmehrabi, John Leo Considine, Yuping Niu, Abdolsamad Tadayon, Subodh Deshmukh, Jennifer Q. Liang, Yanzhong Wu
  • Patent number: 7419982
    Abstract: The present invention relates to crystalline forms of 5-chloro-6-{2,6-difluoro-4-[3-(methylamino)propoxy]phenyl}-N-[(1S)-2,2,2-trifluoro-1-methylethyl][1,2,4]triazolo[1,5-a]pyrimidin-7-amine salts; processes for the production thereof; pharmaceutical compositions thereof; and methods for inhibiting tumor growth therewith.
    Type: Grant
    Filed: May 19, 2006
    Date of Patent: September 2, 2008
    Assignee: Wyeth Holdings Corporation
    Inventors: Fang Fang Qi, Mannching Sherry Ku, Yanzhong Wu, David M. Blum
  • Patent number: 7396835
    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: Grant
    Filed: December 8, 2004
    Date of Patent: July 8, 2008
    Assignee: Wyeth
    Inventors: Yanzhong Wu, Jean Schmid, Jay Thomas Afragola, David Blum, Semiramis Ayral-Kaloustian
  • Publication number: 20080058523
    Abstract: The present invention relates to processes for synthesizing piperazine-piperidine compounds, and compounds useful as 5-HT1A binding agents, particularly as 5-HT1A receptor antagonists and agonists. The processes also allow for safer and environmentally tolerant production of these useful compounds.
    Type: Application
    Filed: June 7, 2007
    Publication date: March 6, 2008
    Inventors: Weiguo Liu, Vladimir Dragan, Henry Strong, Yanzhong Wu, Zhixin Wen, Jessica Liang, Haris Durutlic, Karen Sutherland, Anthony Pilcher
  • Publication number: 20080058521
    Abstract: The present invention provides improved synthetic methods for the preparation of compounds that modulate proliferation or differentiation in a cell or tissue.
    Type: Application
    Filed: January 25, 2007
    Publication date: March 6, 2008
    Applicant: Wyeth
    Inventors: Lalitha Krishnan, David Blum, Anja Dilley, Sherry Pan, John Potoski, Uresh Shah, Archana Sharma, Henry Strong, Yanzhong Wu, Mei-Yi Zhang, Cynthia Blum
  • Publication number: 20070249627
    Abstract: The invention provides 6-chloro-5-{2,6-difluoro-4-[3-(methylamino)propoxy]phenyl}-2-pyrazin-2-yl-N-[(1S)-2,2,2-trifluoro-1-methylethyl]pyrimidin-4-amine hemifumarate which is a tubulin inhibitor useful in the treatment of cancer and processes of making said hemifumarate.
    Type: Application
    Filed: June 4, 2007
    Publication date: October 25, 2007
    Applicant: Wyeth
    Inventors: David Blum, Yanzhong Wu, Jean Schmid, Timothy Doyle, Jay Afragola
  • Patent number: 7284930
    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: Grant
    Filed: October 20, 2003
    Date of Patent: October 23, 2007
    Assignee: CJS Technology, Inc.
    Inventors: Caijun Shi, Yanzhong Wu
  • Patent number: 7259277
    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: March 8, 2005
    Date of Patent: August 21, 2007
    Assignee: Wyeth
    Inventors: Yanzhong Wu, Panolil Raveendrath
  • Patent number: 7253291
    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: Grant
    Filed: November 16, 2004
    Date of Patent: August 7, 2007
    Assignee: Wyeth
    Inventors: Yanzhong Wu, Panolil Raveendranath
  • Patent number: 7244736
    Abstract: The invention provides 6-chloro-5-{2,6-difluoro-4-[3-(methylamino)propoxy]phenyl}-2-pyrazin-2-yl-N-[(1S)-2,2,2-trifluoro-1-methylethyl]pyrimidin-4-amine hemifumarate which is a tubulin inhibitor useful in the treatment of cancer and processes of making hemifumarate compounds and compositioning of the present invention.
    Type: Grant
    Filed: June 12, 2006
    Date of Patent: July 17, 2007
    Assignee: Wyeth
    Inventors: David Michael Blum, Yanzhong Wu, Jean Schmid, Timothy John Doyle, Jay Thomas Afragola
  • Publication number: 20070060597
    Abstract: The present invention relates to crystalline forms of 5-chloro-6-{2,6-difluoro-4-[3-(methylamino)propoxy]phenyl}-N-[(1S)-2,2,2-trifluoro-1-methylethyl][1,2,4]triazolo[1,5-a]pyrimidin-7-amine salts; processes for the production thereof; pharmaceutical compositions thereof; and methods for inhibiting tumor growth therewith.
    Type: Application
    Filed: May 19, 2006
    Publication date: March 15, 2007
    Applicant: Wyeth
    Inventors: Fang Qi, M. Ku, Yanzhong Wu, David Blum
  • Publication number: 20070027327
    Abstract: Processes for preparing oxindoles, which can be utilized in the preparation of a variety of useful compounds, and methods for minimizing or preventing N-alkylation of amide containing compounds, including oxindoles, are provided.
    Type: Application
    Filed: July 27, 2006
    Publication date: February 1, 2007
    Applicant: Wyeth
    Inventors: Yanzhong Wu, Bogdan Wilk, Zhixian Ding, Xinxu Shi, Charles Wu, Panolil Raveendranath, Haris Durutlic
  • Publication number: 20060281760
    Abstract: The invention provides 6-chloro-5-{2,6-difluoro-4-[3-(methylamino)propoxy]phenyl}-2-pyrazin-2-yl-N-[(1S)-2,2,2-trifluoro-1-methylethyl]pyrimidin-4-amine hemifumarate which is a tubulin inhibitor useful in the treatment of cancer and processes of making said hemifumarate.
    Type: Application
    Filed: June 12, 2006
    Publication date: December 14, 2006
    Applicant: Wyeth
    Inventors: David Blum, Yanzhong Wu, Jean Schmid, Timothy Doyle, Jay Afragola
  • Publication number: 20060014973
    Abstract: The present invention provides processes for the preparation of 16?-alkoxy, 17?-hydroxy steroids via the reaction of a 16?,17?-epoxy steroid with an appropriate alcohol in the presence of base. The present invention also provides processes for the preparation of 16?-alkoxy, 17?-hydroxy steroids.
    Type: Application
    Filed: July 15, 2005
    Publication date: January 19, 2006
    Applicant: Wyeth
    Inventors: Yanzhong Wu, Sreenivasulu Megati, Charles Wu, Jianxin Ren, Panolil Raveendranath