Patents by Inventor Wenjun Tang

Wenjun Tang 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: 9127034
    Abstract: The present invention relates to processes for preparing the compounds of general formula I, wherein the groups R1 and R3 are defined according to claim 1. Furthermore this inventions relates to intermediates obtained in these processes.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: September 8, 2015
    Assignee: BOEHRINGER INGELHEIM INTERNATIONAL GMBH
    Inventors: Matthias Eckhardt, Frank Himmelsbach, Xiao-jun Wang, Wenjun Tang, Xiufeng Sun, Li Zhang, Dhileepkumar Krishnamurthy, Christopher Hugh Senanayake, Zhengxu Han
  • Patent number: 9096626
    Abstract: Phosphine ligands of the formula Ia, IB and mixtures thereof.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: August 4, 2015
    Assignee: Boehringer Ingelheim International GmbH
    Inventors: Nizar Haddad, Bo Qu, Sonia Rodriguez, Chris Senanayake, Wenjun Tang, Xudong Wei, Nathan K. Yee
  • Publication number: 20140094610
    Abstract: The present invention is directed to an improved process for the preparation of Compounds of Formula (I) or salts thereof which are useful in the treatment of HIV infection. In particular, the present invention is directed to an improved process for the preparation of (2S)-2-tert-butoxy-2-(4-(2,3-dihydropyrano[4,3,2-de]quinolin-7-yl)-2-methylquinolin-3-yl)acetic acid or salt thereof which is useful in the treatment of HIV infection.
    Type: Application
    Filed: October 3, 2013
    Publication date: April 3, 2014
    Inventors: Wenjie LI, Philomen DECROOS, Keith R. FANDRICK, Joe Ju GAO, Nizar HADDAD, Zhi-Hui LU, Bo QU, Sonia RODRIGUEZ, Chris H. SENANAYAKE, Yongda ZHANG, Wenjun TANG
  • Patent number: 8633320
    Abstract: Disclosed are methods for the preparation of bromo-substituted quinolines of the formula (I) where R is aryl, heteroaryl, alkyl, alkenyl or alkynyl, which are useful as intermediates in the preparation of agents for the treatment of hepatitis C viral (HCV) infections: Formula (I).
    Type: Grant
    Filed: May 3, 2010
    Date of Patent: January 21, 2014
    Assignee: Boehringer Ingelheim International GmbH
    Inventors: Nitinchandra D. Patel, Chris H. Senanayake, Wenjun Tang, Xudong Wei, Nathan K. Yee
  • Patent number: 8629146
    Abstract: The invention relates to a method for the stereoselective preparation of a compound of formula (5), optionally in the form of the tautomers thereof,
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: January 14, 2014
    Assignee: Boehringer Ingelheim International GmbH
    Inventors: Juergen Schnaubelt, Wenjun Tang
  • Patent number: 8552212
    Abstract: The invention relates to a series of novel chiral phosphorus ligands of formulae (Ia) and (Ib): wherein R, 1-rR>4 and X are as defined herein. The invention also relates to chiral metal complexes prepared with these chiral phosphorus ligands. The chiral metal complexes are useful as catalysts for carrying out asymmetric hydro genation.
    Type: Grant
    Filed: November 1, 2010
    Date of Patent: October 8, 2013
    Assignee: Boehringer Ingelheim International GmbH
    Inventors: Bo Qu, Chris Hugh Senanayake, Wenjun Tang, Xudong Wei, Nathan K. Yee
  • Publication number: 20130211081
    Abstract: The invention relates to a method for the stereoselective preparation of a compound of formula (5), optionally in the form of the tautomers thereof,
    Type: Application
    Filed: February 7, 2013
    Publication date: August 15, 2013
    Applicant: Boehringer Ingelheim International GmbH
    Inventors: Juergen SCHNAUBELT, Wenjun TANG
  • Publication number: 20130137902
    Abstract: Phosphine ligands of the formula Ia, IB and mixtures thereof.
    Type: Application
    Filed: March 31, 2011
    Publication date: May 30, 2013
    Applicant: BOEHRINGER INGELHEIM INTERNATIONAL GMBH
    Inventors: Nizar Haddad, Bo Qu, Sonia Rodriguez, Chris Senanayake, Wenjun Tang, Xudong Wei, Nathan K. Yee
  • Publication number: 20130005962
    Abstract: The present invention relates to a process for the manufacturing of substituted 3-amino-tetrahydrofuran-3-carboxylic acid amides of general formula (I) and their precursors in high optical purity to the precursors of the synthesis of substituted S-Amino-tetrahydrofuran-5-carboxylic acid amides of general formula (I) in high optical purity, and to the tautomers, enantiomers, diastereomers, mixtures and salts of substituted 3-amino-tetrahydrofuran-3-carboxylic acid amides of general formula (I) in high optical purity, particularly the physiologically acceptable salts thereof with inorganic or organic acids or bases, which have valuable properties.
    Type: Application
    Filed: September 11, 2012
    Publication date: January 3, 2013
    Applicant: BOEHRINGER INGELHEIM INTERNATIONAL GMBH
    Inventors: Zhengxu HAN, Kai GERLACH, Dhileepkumar KRISHNAMURTHY, Burkhard MATTHES, Herbert NAR, Roland PFAU, Henning PRIEPKE, Annette SCHULER-METZ, Chris H. SENANAYAKE, Peter SIEGER, Wenjun TANG, Wolfgang WIENEN, Yibo XU, Nathan K. YEE
  • Publication number: 20120277455
    Abstract: The invention relates to a series of novel chiral phosphorus ligands of formulae (Ia) and (Ib): wherein R, 1-rR>4 and X are as defined herein. The invention also relates to chiral metal complexes prepared with these chiral phosphorus ligands. The chiral metal complexes are useful as catalysts for carrying out asymmetric hydro genation.
    Type: Application
    Filed: November 1, 2010
    Publication date: November 1, 2012
    Applicant: BOEHRINGER INGELHEIM INTERNATIONAL GMBH
    Inventors: Bo Qu, Chris Hugh Senanayake, Wenjun Tang, Xudong Wei, Nathan K. Yee
  • Publication number: 20120165534
    Abstract: Disclosed are methods for the preparation of bromo-substituted quinolines of the formula (I) where R is aryl, heteroaryl, alkyl, alkenyl or alkynyl, which are useful as intermediates in the preparation of agents for the treatment of hepatitis C viral (HCV) infections: Formula (I).
    Type: Application
    Filed: May 3, 2010
    Publication date: June 28, 2012
    Applicant: BOEHRINGER INGELHEIM INTERNATIONAL GMBH
    Inventors: Nitinchandra D. Patel, Chris H. Senanayake, Wenjun Tang, Xudong Wei, Nathan K. Yee
  • Publication number: 20100317848
    Abstract: The present invention relates to a process for the manufacturing of substituted 3-amino-tetrahydrofuran-3-carboxylic acid amides of general formula (I) and their precursors in high optical purity to the precursors of the synthesis of substituted S-Amino-tetrahydrofuran-S-carboxylic acid amides of general formula (I) in high optical purity, and to the tautomers, enantiomers, diastereomers, mixtures and salts of substituted 3-amino-tetrahydrofuran-3-carboxylic acid amides of general formula (I) in high optical purity, particularly the physiologically acceptable salts thereof with inorganic or organic acids or bases, which have valuable properties.
    Type: Application
    Filed: December 21, 2007
    Publication date: December 16, 2010
    Applicant: BOEHRINGER INGELHEIM INTERNATIONAL GMBH
    Inventors: Zhengxu Han, Kai Gerlach, Dhileepkumar Krishnamurthy, Burkhard Matthes, Herbert Nar, Roland Pfau, Henning Priepke, Annette Schuler-Metz, Chris H. Senanayake, Peter Sieger, Wenjun Tang, Wolfgang Wienen, Yibo Xu, Nathan K. Yee
  • Publication number: 20100240879
    Abstract: The present invention relates to processes for preparing the compounds of general formula I, wherein the groups R1 and R3 are defined according to claim 1. Furthermore this inventions relates to intermediates obtained in these processes.
    Type: Application
    Filed: May 28, 2010
    Publication date: September 23, 2010
    Applicant: BOEHRINGER INGELHEIM INTERNATIONAL GMBH
    Inventors: Matthias ECKHARDT, Frank HIMMELSBACH, Xiao-jun WANG, Wenjun TANG, Xiufeng SUN, Li ZHANG, Dhileepkumar KRISHNAMURTHY, Chris Hugh SENANAYAKE, Zhengxu HAN
  • Patent number: 7772191
    Abstract: The present invention relates to processes for preparing the compounds of general formula I, wherein the groups R1 and R3 are defined according to claim 1. Furthermore this inventions relates to intermediates obtained in these processes.
    Type: Grant
    Filed: May 3, 2006
    Date of Patent: August 10, 2010
    Assignee: Boehringer Ingelheim International GmbH
    Inventors: Matthias Eckhardt, Frank Himmelsbach, Xiao-jun Wang, Wenjun Tang, Xiufeng Sun, Li Zhang, Dhileepkumar Krishnamurthy, Chris Hugh Senanayake, Zhengxu Han
  • Patent number: 7214813
    Abstract: Cyclic ?-(acylamino)acrylate derivatives were hydrogenated using Ru-chiral phosphine ligand catalysts and thereafter converted to the corresponding cyclic ?-aminoacids in high yield and enantioselectivity according to the reaction scheme:
    Type: Grant
    Filed: May 27, 2004
    Date of Patent: May 8, 2007
    Assignee: The Penn State Research Foundation
    Inventors: Xumu Zhang, Wenjun Tang
  • Patent number: 7169953
    Abstract: Chiral ligands and metal complexes based on such chiral ligands useful in asymmetric catalysis are disclosed. The metal complexes according to the present invention are useful as catalysts in asymmetric reactions, such as, hydrogenation, hydride transfer, allylic alkylation, hydrosilylation, hydroboration, hydrovinylation, hydroformylation, olefin metathesis, hydrocarboxylation, isomerization, cyclopropanation, Diels-Alder reaction, Heck reaction, isomerization, Aldol reaction, Michael addition; epoxidation, kinetic resolution and [m+n] cycloaddition. Processes for the preparation of the ligands are also described.
    Type: Grant
    Filed: May 28, 2004
    Date of Patent: January 30, 2007
    Assignee: The Penn State Research Foundation
    Inventors: Xumu Zhang, Wenjun Tang
  • Patent number: 7153809
    Abstract: Chiral ligands and metal complexes based on such chiral ligands useful in asymmetric catalysis are disclosed. The metal complexes according to the present invention are useful as catalysts in asymmetric reactions, such as, hydrogenation, hydride transfer, allylic alkylation, hydrosilylation, hydroboration, hydrovinylation, hydroformylation, olefin metathesis, hydrocarboxylation, isomerization, cyclopropanation, Diels-Alder reaction, Heck reaction, isomerization, Aldol reaction, Michael addition; epoxidation, kinetic resolution and [m+n] cycloaddition. Processes for the preparation of the ligands are also described.
    Type: Grant
    Filed: January 7, 2005
    Date of Patent: December 26, 2006
    Assignee: The Penn State Research Foundation
    Inventors: Xumu Zhang, Wenjun Tang
  • Publication number: 20060258749
    Abstract: The present invention relates to processes for preparing the compounds of general formula I, wherein the groups R1 and R3 are defined according to claim 1. Furthermore this inventions relates to intermediates obtained in these processes.
    Type: Application
    Filed: May 3, 2006
    Publication date: November 16, 2006
    Applicant: Boehringer Ingelheim International GmbH
    Inventors: Matthias Eckhardt, Frank Himmelsbach, Xiao-jun Wang, Wenjun Tang, Xiufeng Sun, Li Zhang, Dhileepkumar Krishnamurthy, Christopher Senanayake, Zhengxu Han
  • Patent number: 7121862
    Abstract: A card edge connector assembly is adapted for mounting on a printed circuit board to electrically connect with a daughter card. The connector assembly includes a dielectric housing defining a longitude direction, a transverse direction perpendicular to the longitude direction and a slot extending from a mating face thereof along the longitudinal direction, a number of terminals respectively disposed at opposite sides of the slot and a retainer aligned with and spaced from the dielectric housing along the longitudinal direction. The retainer includes a flexible arm extending away from the dielectric housing. The flexible arm is formed with a projection for locking the daughter card in position.
    Type: Grant
    Filed: November 30, 2004
    Date of Patent: October 17, 2006
    Assignee: Hon Hai Precision Ind. Co., LTD
    Inventors: WenJun Tang, XueWu Bu
  • Patent number: 7105702
    Abstract: Chiral ligands and metal complexes based on such chiral ligands useful in asymmetric catalysis are disclosed. The metal complexes according to the present invention are useful as catalysts in asymmetric reactions, such as, hydrogenation, hydride transfer, allylic alkylation, hydrosilylation, hydroboration, hydrovinylation, hydroformylation, olefin metathesis, hydrocarboxylation, isomerization, cyclopropanation, Diels-Alder reaction, Heck reaction, isomerization, Aldol reaction, Michael addition; epoxidation, kinetic resolution and [m+n] cycloaddition. Processes for the preparation of the ligands are also described.
    Type: Grant
    Filed: November 8, 2002
    Date of Patent: September 12, 2006
    Assignee: The Penn State Research Foundation
    Inventors: Xumu Zhang, Wenjun Tang