Patents by Inventor Yuen-Lung Sing

Yuen-Lung Sing 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).

  • Publication number: 20080027237
    Abstract: Multiple novel reaction schemes, novel process steps and novel intermediates are provided for the synthesis of 9,11-epoxy steroids.
    Type: Application
    Filed: March 27, 2006
    Publication date: January 31, 2008
    Inventors: John Ng, Chin Liu, Dennis Anderson, Jon Lawson, Joseph Wieczorek, Sastry Kunda, Leo Letendre, Mark Pozzo, Yuen-Lung Sing, Ping Wang, Edward Yonan, Richard Weier, Thomas Kowar, Julio Baez, Bernhard Erb
  • Publication number: 20070060746
    Abstract: Multiple novel reaction schemes, novel process steps and novel intermediates are provided for the synthesis of epoxymexrenone and other compounds of Formula I wherein: -A-A- represents the group —CHR4—CHR5— or —CR4?CR5— —R3, R4 and R5 are independently selected from the group consisting of hydrogen, halo, hydroxy, lower alkyl, lower alkoxy, hydroxyalkyl, alkoxyalkyl, hydroxycarbonyl, cyano, aryloxy, R1 represents an alpha-oriented lower alkoxycarbonyl or hydroxyalkyl radical, —B—B— represents the group —CHR6—CHR7— or an alpha- or beta-oriented group: where R6 and R7 are independently selected from the group consisting of hydrogen, halo, lower alkoxy, acyl, hydroxyalkyl, alkoxyalkyl, hydroxycarbonyl, alkyl, alkoxycarbonyl, acyloxyalkyl, cyano, aryloxy, and R8 and R9 are independently selected from the group consisting of hydrogen, halo, lower alkoxy, acyl, hydroxyalkyl, alkoxyalkyl, hydroxycarbonyl, alkyl, alkoxycarbonyl, acyloxyalkyl, cyano, aryloxy, or R8 and R9 together comprise a carbocyclic
    Type: Application
    Filed: July 21, 2006
    Publication date: March 15, 2007
    Inventors: John Ng, Ping Wang, Julio Baez, Chin Liu, Dennis Anderson, Jon Lawson, Bernhard Erb, Joseph Wieczorek, Gennaro Mucciariello, Fortunato Vanzanella, Sastry Kunda, Leo Letendre, Mark Pozzo, Yuen-Lung Sing, Edward Yonan
  • Publication number: 20050267302
    Abstract: A novel crystalline form (Form H) of the aldosterone receptor antagonist drug eplerenone is provided having a relatively rapid dissolution rate in aqueous media. Also provided are novel solvated crystalline forms of eplerenone that, when desolvated, can yield Form H eplerenone. Also provided is amorphous eplerenone. Pharmaceutical compositions are provided comprising Form H eplerenone, optionally accompanied by one or more other solid state forms of eplerenone, in a total unit dosage amount of eplerenone of about 10 to about 1000 mg, and further comprising one or more pharmaceutically acceptable excipients. Processes are provided for preparing Form H eplerenone and for preparing compositions comprising Form H eplerenone. A method for prophylaxis and/or treatment of an aldosterone-mediated condition or disorder is also provided, comprising administering to a subject a therapeutically effective amount of eplerenone, wherein at least a fraction of the eplerenone present is Form H eplerenone.
    Type: Application
    Filed: December 4, 2003
    Publication date: December 1, 2005
    Applicant: G.D. Searle & Co.
    Inventors: Kathleen Barton, Thomas Borchardt, Marlon Carlos, Subhash Desai, Leonard Ferro, Henry Gaud, Scott Ganser, Clay Little, Partha Mudipalli, Mark Pietz, Daniel Pilipauskas, Yuen-Lung Sing, Glenn Stahl, Joseph Wieczorek, Chris Yan
  • Publication number: 20050261261
    Abstract: A novel crystalline form (Form L) of the aldosterone receptor antagonist drug eplerenone is provided having relatively high physical stability at normal temperatures of storage and use. Pharmaceutical compositions are also provided comprising Form L eplerenone, optionally accompanied by one or more other solid state forms of eplerenone, in a total unit dosage amount of eplerenone of about 10 to about 1000 mg, and further comprising one or more pharmaceutically acceptable excipients. Processes are provided for preparing Form L eplerenone and for preparing compositions comprising Form L eplerenone. A method for prophylaxis and/or treatment of an aldosterone-mediated condition or disorder is also provided, comprising administering to a subject a therapeutically effective amount of eplerenone, wherein at least a fraction of the eplerenone present is Form L eplerenone.
    Type: Application
    Filed: February 7, 2005
    Publication date: November 24, 2005
    Applicant: Pharmacia Corporation
    Inventors: Kathleen Barton, Thomas Borchardt, Marlon Carlos, Subhash Desai, Leonard Ferro, Henry Gaud, Scott Ganser, Clay Little, Partha Mudipalli, Mark Pietz, Daniel Pilipauskas, Yuen-Lung Sing, Glenn Stahl, Joseph Wieczorek, Chris Yan
  • Publication number: 20050256094
    Abstract: Intermediates in the preparation of 9,11-epoxy steroids are disclosed. Particularly, disclosed are 11,12-epoxy steroid, 4,5-9,11-diepoxy steroid and 12-keto steroid intermediates.
    Type: Application
    Filed: February 7, 2005
    Publication date: November 17, 2005
    Applicant: G. D. Searle & Company
    Inventors: John Ng, Chin Liu, Dennis Anderson, Jon Lawson, Joseph Wieczorek, Sastry Kunda, Leo Letendre, Mark Pozzo, Yuen-Lung Sing, Ping Wang, Edward Yonan, Richard Weir, Thomas Kowar, Julio Baez, Bernhard Erb
  • Publication number: 20050239761
    Abstract: Novel 9?-hydroxy steroid compounds, including compounds of Formula IX wherein -A-A-, —B—B—, R1, R3, R8 and R9 are as defined in the specification.
    Type: Application
    Filed: June 20, 2005
    Publication date: October 27, 2005
    Inventors: John Ng, Ping Wang, Julio Baez, Chin Liu, Dennis Anderson, Jon Lawson, Bernhard Erb, Joseph Wieczorek, Gennaro Mucciariello, Fortunato Vanzanella, Sastry Kunda, Leo Letendre, Mark Pozzo, Yuen-Lung Sing, Edward Yonan
  • Publication number: 20050159594
    Abstract: A novel crystalline form (Form H) of the aldosterone receptor antagonist drug eplerenone is provided having a relatively rapid dissolution rate in aqueous media. Also provided are novel solvated crystalline forms of eplerenone that, when desolvated, can yield Form H eplerenone. Also provided is amorphous eplerenone. Pharmaceutical compositions are provided comprising Form H eplerenone, optionally accompanied by one or more other solid state forms of eplerenone, in a total unit dosage amount of eplerenone of about 10 to about 1000 mg, and further comprising one or more pharmaceutically acceptable excipients. Processes are provided for preparing Form H eplerenone and for preparing compositions comprising Form H eplerenone. A method for prophylaxis and/or treatment of an aldosterone-mediated condition or disorder is also provided, comprising administering to a subject a therapeutically effective amount of eplerenone, wherein at least a fraction of the eplerenone present is Form H eplerenone.
    Type: Application
    Filed: July 16, 2004
    Publication date: July 21, 2005
    Applicant: Pharmacia Corporation
    Inventors: Kathleen Barton, Thomas Borchardt, Marlon Carlos, Subhash Desai, Leonard Ferro, Henry Gaud, Scott Ganser, Clay Little, Partha Mudipalli, Mark Pietz, Daniel Pilipauskas, Yuen-Lung Sing, Glenn L. Stahl, Joseph Wieczorek, Chris Yan