Patents by Inventor David R. Kronenthal

David R. Kronenthal 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: 9249171
    Abstract: A process for making the compound of Formula I utilizes the starting compound, together with sulfilimine and sulfoxide process steps later on.
    Type: Grant
    Filed: May 22, 2013
    Date of Patent: February 2, 2016
    Assignee: Bristol-Myers Squibb Company
    Inventors: Adrian Ortiz, Tamas Benkovics, Zhongping Shi, Prashant P. Deshpande, Zhiwei Guo, David R. Kronenthal, Chris Sfouggatakis
  • Publication number: 20150140610
    Abstract: A process for making the compound of Formula I utilizes the starting compound, together with sulfilimine and sulfoxide process steps later on.
    Type: Application
    Filed: May 22, 2013
    Publication date: May 21, 2015
    Inventors: Adrian Ortiz, Tamas Benkovics, Zhongping Shi, Prashant P. Deshpande, Zhiwei Guo, David R. Kronenthal, Chris Sfouggatakis
  • Patent number: 7968718
    Abstract: A process is provided for preparing triazole substituted azaindoleoxoacetic piperazine derivative. Novel intermediates produced in the above process, and novel N-1 and amorphous forms of a 1,2,3-triazole substituted azaindoloxoacetic piperazine derivatives and processes for producing such novel forms are also provided.
    Type: Grant
    Filed: August 27, 2009
    Date of Patent: June 28, 2011
    Assignee: Bristol-Myers Squibb Company
    Inventors: Nachimuthu Soundararajan, Yuping Qiu, Wenhao Hu, David R. Kronenthal, Pierre Sirard, Jean Lajeunesse, Robert Droghini, Ramakrishnan Chidambaram, Xinhua Qian, Kenneth J. Natalie, Shawn K. Pack, Nathan Reising, Erqing Tang, Michael G. Fakes, Qi Gao, Feng Qian, Blisse J. Vakkalagadda, Chiajen Lai, Shan-Ming Kuang
  • Publication number: 20100076191
    Abstract: A process is provided for preparing triazole substituted azaindoleoxoacetic piperazine derivative. Novel intermediates produced in the above process, and novel N-1 and amorphous forms of a 1,2,3-triazole substituted azaindoloxoacetic piperazine derivatives and processes for producing such novel forms are also provided.
    Type: Application
    Filed: August 27, 2009
    Publication date: March 25, 2010
    Inventors: NACHIMUTHU SOUNDARARAJAN, Yuping Qiu, Wenhao Hu, David R. Kronenthal, Pierre Sirard, Jean Lajeunesse, Robert Droghini, Ramakrishnan Chidambaram, Xinhua Qian, Kenneth J. Natalie, Shawn K. Pack, Nathan Reising, Erqing Tang, Michael G. Fakes, Qi Gao, Feng Qian, Blisse J. Vakkalagadda, Chiajen Lai, Shan-Ming Kuang
  • Patent number: 7601715
    Abstract: A process is provided for preparing triazole substituted azaindoleoxoacetic piperazine derivative. Novel intermediates produced in the above process, and novel N-1 and amorphous forms of a 1,2,3-triazole substituted azaindoloxoacetic piperazine derivatives and processes for producing such novel forms are also provided.
    Type: Grant
    Filed: June 19, 2006
    Date of Patent: October 13, 2009
    Assignee: Bristol-Myers Squibb Company
    Inventors: Nachimuthu Soundararajan, Yuping Qiu, Wenhao Hu, David R. Kronenthal, Pierre Sirard, Jean Lajeunesse, Robert Droghini, Ramakrishnan Chidambaram, Xinhua Qian, Kenneth J. Natalie, Shawn K. Pack, Nathan Reising, Erqing Tang, Michael G. Fakes, Qi Gao, Feng Qian, Blisse J. Vakkalagadda, Chiajen Lai, Shan-Ming Kuang
  • Patent number: 7074921
    Abstract: Methods for the synthesis of benzodiazepine compounds having farnesyl protein transferase inhibitory activity.
    Type: Grant
    Filed: November 12, 2002
    Date of Patent: July 11, 2006
    Assignee: Bristol Myers Squibb Company
    Inventors: David R. Kronenthal, Rao S. Bhandaru, Zhongping Shi, Boguslaw M. Mudryk
  • Patent number: 7034152
    Abstract: Processes are disclosed for preparing the antiviral agent entecavir. A resin adsorption process for the isolation and purification of entecavir is also disclosed. Various intermediates useful in the preparation of entecavir are also disclosed.
    Type: Grant
    Filed: December 11, 2003
    Date of Patent: April 25, 2006
    Assignee: Bristol-Myers Squibb Company
    Inventors: Yadagiri R. Pendri, Chung-Pin H. Chen, Sunil S. Patel, Jeffrey M. Evans, Jing Liang, David R. Kronenthal, Gerald L. Powers, Siva Josyula Prasad, Jeffrey T. Bien, Zhongping Shi, Ramesh N. Patel, Amit Banerjee, Yeung Yu Chan, Sushil K. Rijhwani, Ambarish K. Singh, Shaopeng Wang, Milan Stojanovic, David J. Kucera, Richard P. Polniaszek, Charles Lewis, John Thottathil, Dhileepkumar Krishnamurty, Maotang X. Zhou, Purushotham Vemishetti
  • Publication number: 20040192912
    Abstract: Processes are disclosed for preparing the antiviral agent entecavir. A resin adsorption process for the isolation and purification of entecavir is also disclosed. Various intermediates useful in the preparation of entecavir are also disclosed.
    Type: Application
    Filed: December 11, 2003
    Publication date: September 30, 2004
    Inventors: Yadagiri R. Pendri, Chung-Pin H. Chen, Sunil S. Patel, Jeffrey M. Evans, Jing Liang, David R. Kronenthal, Gerald L. Powers, Siva Josyula Prasad, Jeffrey T. Bien, Zhongping Shi, Ramesh N. Patel, Amit Banerjee, Yeung Yu Chan, Sushil K. Rijhwani, Ambarish K. Singh, Shaopeng Wang, Milan Stojanovic, David J. Kucera, Richard P. Polniaszek, Charles Lewis, John Thottathil, Dhileepkumar Krishnamurty, Maotang X. Zhou, Purushotham Vemishetti
  • Publication number: 20030162965
    Abstract: Methods for the synthesis of benzodiazepine compounds having farnesyl protein transferase inhibitory activity.
    Type: Application
    Filed: November 12, 2002
    Publication date: August 28, 2003
    Inventors: David R. Kronenthal, Rao S. Bhandaru, Zhongping Shi, Boguslaw M. Mudryk
  • Patent number: 6486315
    Abstract: Mercaptoalkanoylamino lactam acids are recrystallized by treatment with an agent that minimizes the formation of disulfides. Suitable agents are bismercaptans, phosphine or phosphite reducing agents, zinc metal powder, and sodium hydrosulfite.
    Type: Grant
    Filed: November 16, 2001
    Date of Patent: November 26, 2002
    Assignee: Bristol-Myers Squibb Co.
    Inventors: David R. Kronenthal, Rajendra P. Deshpande, James Simpson
  • Patent number: 6444810
    Abstract: Acylmercaptoalkanoylamino lactam esters or acids are converted to the corresponding mercaptoalkanoylamino lactam ester or acid under basic conditions by including an agent which minimizes the amount of disulfides. Suitable agents are bismercaptans, phosphine or phosphate reducing agents, zinc metal powder, and sodium hydrosulfite.
    Type: Grant
    Filed: November 16, 2001
    Date of Patent: September 3, 2002
    Assignee: Bristol-Myers Squibb Co.
    Inventors: David R. Kronenthal, Rajendra P. Deshpande
  • Publication number: 20020086995
    Abstract: Mercaptoalkanoylamino lactam acids are recrystallized by treatment with an agent that minimizes the formation of disulfides. Suitable agents are bismercaptans, phosphine or phosphite reducing agents, zinc metal powder, and sodium hydrosulfite.
    Type: Application
    Filed: November 16, 2001
    Publication date: July 4, 2002
    Inventors: David R. Kronenthal, Rajendra P. Deshpande, James Simpson
  • Publication number: 20020086994
    Abstract: Acylmercaptoalkanoylamino lactam esters or acids are converted to the corresponding mercaptoalkanoylamino lactam ester or acid under basic conditions by including an agent which minimizes the amount of disulfides. Suitable agents are bismercaptans, phosphine or phosphite reducing agents, zinc metal powder, and sodium hydrosulfite.
    Type: Application
    Filed: November 16, 2001
    Publication date: July 4, 2002
    Inventors: David R. Kronenthal, Rajendra P. Deshpande
  • Patent number: 6340752
    Abstract: Acylmercaptoalkanoylamino lactam esters or acids are converted to the corresponding mercaptoalkanoylamino lactam ester or acid under basic conditions by including an agent which minimizes the amount of disulfides. Suitable agents are bismercaptans, phosphine or phosphite reducing agents, zinc metal powder, and sodium hydrosulfite. Such agents are also employed in the recrystallization and reprocessing of the mercaptoalkanoylamino lactam acids.
    Type: Grant
    Filed: December 9, 1998
    Date of Patent: January 22, 2002
    Assignee: Bristol-Myers Squibb Co.
    Inventors: David R. Kronenthal, Theodor Denzel, Bang-Chi Chen, James H. Simpson, Rajendra P. Deshpande
  • Patent number: 6335324
    Abstract: Compounds of the formulas: are disclosed. These compounds inhibit tryptase as well as other enzyme systems or are selective tryptase inhibitors and are useful as antiinflammatory agents particularly in the treatment of chronic asthma.
    Type: Grant
    Filed: December 13, 1999
    Date of Patent: January 1, 2002
    Assignee: Bristol-Myers Squibb Co.
    Inventors: Gregory S. Bisacchi, William A. Slusarchyk, Uwe Treuner, James C. Sutton, Robert Zahler, Steven Seiler, David R. Kronenthal, Michael E. Randazzo, Mark D. Schwinden, Zhongmin Xu, Zhongping Shi
  • Patent number: 6329542
    Abstract: The glycinamide of the formula is reacted with the dioxolane of the formula wherein L is a leaving group such as iodo, bromo, alkylsulfonyloxy, or arylsulfonyloxy to give the dioxolane of the formula Treating the dioxolane of formula III under aqueous refluxing conditions followed by exchanging the dioxolane acetal with a dimethoxy acetal and introduction of the methyl ester gives (S)-2-amino-6,6-dimethoxyhexanoic acid, methyl ester which is an intermediate in the preparation of the dual inhibitor [4S-[4&agr;(R*),7&agr;,10a&bgr;]]-octahydro-4-[(2-mercapto-1-oxo-3-phenylpropyl)-amino]-5-oxo-7H-pyrido[2,1-b][1,3]thiazepine-7-carboxylic acid. Also disclosed are storage stable salts of (S)-2-amino-6, 6-dimethoxyhexanoic acid, methyl ester.
    Type: Grant
    Filed: October 12, 2000
    Date of Patent: December 11, 2001
    Assignee: Bristol-Myers Squibb Co.
    Inventors: Jollie D. Godfrey, Jr., David R. Kronenthal, Mark D. Schwinden, Sushil K. Srivastava, Keith Ramig, John J. Venit, Paul A. Jass, Saibaba Racha, John L. Dillon, Jr., Nachimuthu Soundararajan, Gerald L. Powers, Atul S. Kotnis
  • Patent number: 6248882
    Abstract: The glycinamide of the formula is reacted with the dioxolane of the formula wherein L is a leaving group such as iodo, bromo, alkylsulfonyloxy, or arylsulfonyloxy to give the dioxolane of the formula Treating the dioxolane of formula III under aqueous refluxing conditions followed by exchanging the dioxolane acetal with a dimethoxy acetal and introduction of the methyl ester gives (S)-2-amino-6,6-dimethoxyhexanoic acid, methyl ester which is an intermediate in the preparation of the dual inhibitor [4S-[4&agr;(R*),7&agr;, 10a&bgr;]]-)octahydro-4-[(2-mercapto-1-oxo-3-phenylpropy)-amino]-5-oxo-7H-pyrido[2,1-b][1,3]thiazepine-7-carboxylic acid. Also disclosed are storage stable salts of (S)-2-amino-6,6-dimethoxyhexanoic acid, methyl ester.
    Type: Grant
    Filed: October 12, 2000
    Date of Patent: June 19, 2001
    Assignee: Bristol-Myers Squibb Co.
    Inventors: Jollie D. Godfrey, Jr., David R. Kronenthal, Mark D. Schwinden, Sushil K. Srivastava, Keith Ramig, John J. Venit, Paul A. Jass, Saibaba Racha, John L. Dillon, Jr., Nachimuthu Soundararajan, Gerald L. Powers, Atul S. Kotnis
  • Patent number: 6166227
    Abstract: The glycinamide of the formula (I) ##STR1## is reacted with the dioxolane of the formula (II) ##STR2## wherein L is a leaving group such as iodo, bromo, alkylsulfonyloxy, or arylsulfonyloxy to give the dioxolane of the formula (III) ##STR3## Treatment of (III) gives the dioxolane pentanoic acid IV ##STR4## which can be converted to (S)-2-amino-6,6-dimethoxyhexanoic acid, methyl ester.
    Type: Grant
    Filed: July 8, 1999
    Date of Patent: December 26, 2000
    Assignee: Bristol-Myers Squibb Co.
    Inventors: Jollie D. Godfrey, Jr., David R. Kronenthal, Mark D. Schwinden
  • Patent number: 5629429
    Abstract: A method of preparing compounds of the formula ##STR1## and pharmaceutically acceptable salts thereof which comprises converting a compound of the formula ##STR2## where the R.sup.2 substituent contains a hydrogen atom which is more acidic than the starred (*) hydrogen atom in formula II, to the corresponding dianion of formula ##STR3## where M is a counterion preferably lithium or magnesium, using two equivalents of a base in an inert solvent such as tetrahydrofuran; then reacting compounds of formula IIA with an epoxide of formula ##STR4## to produce the compounds of formula I.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: May 13, 1997
    Assignee: Bristol-Myers Squibb Company
    Inventors: David R. Kronenthal, Richard H. Mueller, Jollie D. Godfrey, Jr.
  • Patent number: 5616775
    Abstract: Homocysteine analogs of the formula ##STR1## wherein P.sub.1 is a nitrogen protecting group and R.sub.6 is alkyl, substituted alkyl or benzyl are prepared by esterifying N-protected L-methionine, oxidizing, treating the resulting sulfoxide with an acid anhydride, treating the resulting product with an alkali metal hydroxide followed by removal of formaldehyde and the treatment with an acid anhydride or acid halide. The L-homocysteine analogs are useful as intermediates in the preparation of compounds containing a fused bicyclic ring.
    Type: Grant
    Filed: February 5, 1996
    Date of Patent: April 1, 1997
    Assignee: Bristol-Myers Squibb Co.
    Inventors: David R. Kronenthal, Jollie D. Godfrey, Jr.