Patents by Inventor Charles Chao Wu

Charles Chao 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).

  • Process for the synthesis of progesterone receptor modulators
    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
  • Halogenation catalyst
    Patent number: 6206819
    Abstract: N,N-disubstituted formamides, wherein the substituents are selected to provide formamides which have low volatility, are useful as halogenation catalysts. Such catalysts are generally less hazardous to use than typical formamide halogenation catalysts because toxic catalyst by-products are also less volatile. Methods for using such catalysts are provided.
    Type: Grant
    Filed: May 15, 2000
    Date of Patent: March 27, 2001
    Assignee: Rohm and Haas Company
    Inventors: Deborah Diane Graves, Thomas Duncan Rose, David James Swank, Charles Chao Wu
  • Process for synthesizing benzoic acids
    Patent number: 6124500
    Abstract: A nucleophilic substitution reaction on optionally substituted dihalobenzenes is carried out in the presence of an optional catalyst followed by formation of and subsequent carboxylation of a Grignard reaction intermediate. In particular the present invention provides a process leading to optionally substituted hydroxybenzoic, alkanoyloxybenzoic, formyloxybenzoic and alkoxybenzoic acids from 1-substituted 2,6-dihalobenzenes. The invention also provides a process for the direct formation of an acyl chloride from a Grignard reagent by quenching with phosgene.
    Type: Grant
    Filed: December 22, 1998
    Date of Patent: September 26, 2000
    Assignee: Rohm and Haas Company
    Inventors: Joshua Anthony Chong, Fereydon Abdesaken, Lori Ann Spangler, Sudhir Ramtirth Joshi, Charles Chao Wu
  • Process for synthesizing benzoic acids
    Patent number: 5965766
    Abstract: Nucleophilic substitution reactions on halobenzenes or triflyl substituted benzenes are carried out in the presence of catalysts. In particular the present invention provides a process leading to optionally substituted hydroxybenzoic, alkanoyloxybenzoic, formyloxybenzoic and alkoxybenzoic acids and optionally substituted hydroxybenzonitriles and alkoxybenzonitriles from substituted 2,6-dihalobenzenes, 2-halo-6-triflylbenzene and 2,6-ditriflylbenzenes.
    Type: Grant
    Filed: February 2, 1998
    Date of Patent: October 12, 1999
    Assignee: Rohm and Haas Company
    Inventors: Joshua Anthony Chong, Fereydon Abdesaken, Charles Chao Wu
  • Process to chloroketoamines using carbamates
    Patent number: 5922916
    Abstract: The present invention relates to a process for preparing 5-methylene cyclic carbamates either by cyclization of an alkynyl amine with carbon dioxide in the presence of a copper catalyst or by forming an isocyanate from a substituted acetoacetamide followed by hydrolysis. The 5-methylene cyclic carbamates by either method are converted to 5-(chloromethylene) cyclic carbamates, using trichloroisocyanuric acid, followed by hydrolysis to a chloroketoamine.The chloroketoamine from the process of this invention additionally can be reacted with an organic acid chloride to form an amide compound which is useful as a fungicide.
    Type: Grant
    Filed: April 13, 1998
    Date of Patent: July 13, 1999
    Assignee: Rohm and Haas Company
    Inventors: Heather Lynnette Rayle, Renee Caroline Roemmele, Randall Wayne Stephens, Joshua Anthony Chong, Fereydon Abdesaken, Charles Chao Wu
  • Process for synthesizing benzoic acids
    Patent number: 5917079
    Abstract: Nucleophilic substitution reactions on halobenzenes are carried out in the presence of catalysts. In particular the present invention provides a process leading to optionally substituted hydroxybenzoic and alkoxybenzoic acids and optionally substituted hydroxybenzonitriles and alkoxybenzonitriles from substituted 2,6-dihalobenzenes.
    Type: Grant
    Filed: July 1, 1997
    Date of Patent: June 29, 1999
    Assignee: Rohm and Haas Company
    Inventors: Joshua Anthony Chong, Fereydon Abdesaken, Charles Chao Wu