Patents by Inventor Petra Dieterich

Petra Dieterich 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: 9920016
    Abstract: Processes for the preparation of 4-amino-1-((1S,4R,5S)-2-fluoro-4,5-dihydroxy-3 -hydroxymethyl-cyclopent-2-enyl)-1H-pyrimidin-2-one(13, RX-3117) and its intermediates are described.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: March 20, 2018
    Assignee: REXAHN PHARMACEUTICALS, INC.
    Inventors: Deog Joong Kim, Haifeng Yin, Eliezer Falb, Leigh Andre Pearcey, Jonathan Cummins, Petra Dieterich, Jean-Francois Carniaux, Yi Wang, Vikram Chandrakant Purohit
  • Publication number: 20170368052
    Abstract: The present invention provides solid crystalline forms of apomorphine free base or a hydrate, solvate, or co-crystals thereof. Such crystalline forms may be advantageous over amorphous forms of apomorphine, e.g., amorphous salt forms such as acid addition salts of apomorphine, because of their increased/greater stability and/or improved pharmacological properties, e.g., decreased adverse reactions at the site of administration. The invention further provides liquid formulations obtained by dissolving said crystalline forms of apomorphine in a solvent, as well as a method for treatment of a neurological or movement disorder, e.g., Parkinson's disease, or a condition associated therewith, by administration of said liquid formulations.
    Type: Application
    Filed: December 23, 2015
    Publication date: December 28, 2017
    Inventors: Oron Yacoby-Zeevi, Mara Nemas, Jonathan Cummins, Petra Dieterich
  • Publication number: 20170158662
    Abstract: Processes for the preparation of 4-amino-1-((1S,4R,5S)-2-fluoro-4,5-dihydroxy-3-hydroxymethyl-cyclopent-2-enyl)-1H-pyrimidin-2-one (13, RX-3117) and its intermediates are described.
    Type: Application
    Filed: December 15, 2016
    Publication date: June 8, 2017
    Applicant: Rexahn Pharmaceuticals, Inc.
    Inventors: Deog Joong Kim, Haifeng Yin, Eliezer Falb, Leigh Andre Pearcey, Jonathan Cummins, Petra Dieterich, Jean-Francois Carniaux, Yi Wang, Vikram Chandrakant Purohit
  • Patent number: 9533958
    Abstract: Processes for the preparation of 4-amino-1-((1S,4R,5S)-2-fluoro-4,5-dihydroxy-3-hydroxymethyl-cyclopent-2-enyl)-1H-pyrimidin-2-one (13, RX-3117) and its intermediates are described.
    Type: Grant
    Filed: September 4, 2015
    Date of Patent: January 3, 2017
    Assignee: Rexahn Pharmaceuticals, Inc.
    Inventors: Haifeng Yin, Deog Joong Kim, Eliezer Falb, Leigh Andre Pearcey, Jonathan Cummins, Petra Dieterich, Jean-Francois Carniaux, Yi Wang, Vikram Chandrakant Purohit
  • Publication number: 20150376142
    Abstract: Processes for the preparation of 4-amino-1((1S,4R,5S)-2-fluoro-4,5-dihydroxy-3-hydroxymethyl-cyclopent-2-enyl)-1H-pyrimidin-2-one (13, RX-3117) and its intermediates are described.
    Type: Application
    Filed: September 4, 2015
    Publication date: December 31, 2015
    Inventors: Haifeng Yin, Deog Joong Kim, Eliezer Falb, Leigh Andre Pearcey, Jonathan Cummins, Petra Dieterich, Jean-Francois Carniaux, Yi Wang, Vikram Chandrakant Purohit
  • Patent number: 9150520
    Abstract: Processes for the preparation of 4-amino-1-((1S,4R,5S)-2-fluoro-4,5-dihydroxy-3-hydroxymethyl-cyclopent-2-enyl)-1H-pyrimidin-2-one (13, RX-3117) and its intermediates are described.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: October 6, 2015
    Assignee: Rexahn Pharmaceuticals, Inc.
    Inventors: Haifeng Yin, Deog J. Kim, Eliezer Falb, Leigh A. Pearcey, Jonathan Cummins, Petra Dieterich, Jean-Francois Carniaux, Yi Wang, Vikram Chandrakant Purohit
  • Publication number: 20140275537
    Abstract: Processes for the preparation of 4-amino-1-((1S,4R,5S)-2-fluoro-4,5-dihydroxy-3-hydroxymethyl-cyclopent-2-enyl)-1H-pyrimidin-2-one (13, RX-3117) and its intermediates are described.
    Type: Application
    Filed: March 17, 2014
    Publication date: September 18, 2014
    Applicant: Rexahn Pharmaceuticals, Inc.
    Inventors: Haifeng YIN, Deog Joong KIM, Eliezer FALB, Leigh Andre PEARCEY, Jonathan CUMMINS, Petra DIETERICH, Jean-Francois CARNIAUX
  • Publication number: 20040138453
    Abstract: The invention relates to a process for simultaneously N(2)-acylating piperazic acid or an ester thereof and forming a bicyclic ring structure. The invention also relates to the use of that process step in a method of synthesizing a bicyclic compound useful as an intermediate for the production of an inhibitor of a caspase, particularly an inhibitor of interleukin-1&bgr; converting enzyme (“ICE”).
    Type: Application
    Filed: May 5, 2003
    Publication date: July 15, 2004
    Inventors: Andrea L. C. Robidoux, Jeffrey Douglas Wilson, Petra Dieterich, Neil Storer, Stefania Leonardi
  • Patent number: 6703500
    Abstract: The invention relates to a process for synthesizing piperazic acid and similar, ring-containing acids. The invention also relates to a process for simultaneously N(2)-acylating piperazic acid or an ester thereof and forming a bicyclic ring structure. The invention also relates to the use of either or both processes in a method of synthesizing a bicyclic compound useful as an intermediate for the production of an inhibitor of a caspase, particularly an inhibitor of interleukin-1&bgr; converting enzyme (“ICE”).
    Type: Grant
    Filed: February 20, 2001
    Date of Patent: March 9, 2004
    Assignee: Vertex Pharmaceuticals, Incorporated
    Inventors: Andrea L. C. Robidoux, Jeffrey Douglas Wilson, Petra Dieterich, Neil Storer, Stefania Leonardi
  • Patent number: 6632942
    Abstract: This invention provides a concise, asymmetric synthesis of piperazic acid and derivatives thereof, whereby either the (3S)- or (3R)-enantiomeric form may be obtained with high optical purity. (3S)-piperazic acid is derived from D-glutamic acid through an (R)-2,5-dihydroxyvalerate ester intermediate. After the hydroxy groups are converted to suitable leaving groups, such as mesylates, the ester is treated with a bis-protected hydrazine to provide the desired (3S)-piperazic acid derivative. The (3R) enantiomer of piperazic acid may be similarly obtained starting with L-glutamic acid. The method may also be used to obtain piperazic acid derivatives that have moderate optical purity or are racemic. By this method, piperazic acid derivatives may be obtained that are useful as intermediates for pharmacologically active compounds. For example, certain intermediates of this invention are useful for preparing caspase inhibitors, particularly inhibitors of ICE, through additional steps known in the art.
    Type: Grant
    Filed: June 14, 2002
    Date of Patent: October 14, 2003
    Assignee: Vertex Pharmaceuticals Incorporated
    Inventors: Andrea L. C. Robidoux, Siro Serafini, Petra Dieterich, Stefania Leonardi, John Stibbard
  • Publication number: 20030176691
    Abstract: This invention provides a concise, asymmetric synthesis of piperazic acid and derivatives thereof, whereby either the (3S)- or (3R)-enantiomeric form may be obtained with high optical purity. (3S)-piperazic acid is derived from D-glutamic acid through an (R)-2,5-dihydroxyvalerate ester intermediate. After the hydroxy groups are converted to suitable leaving groups, such as mesylates, the ester is treated with a bis-protected hydrazine to provide the desired (3S)-piperazic acid derivative. The (3R) enantiomer of piperazic acid may be similarly obtained starting with L-glutamic acid. The method may also be used to obtain piperazic acid derivatives that have moderate optical purity or are racemic. By this method, piperazic acid derivatives may be obtained that are useful as intermediates for pharmacologically active compounds. For example, certain intermediates of this invention are useful for preparing caspase inhibitors, particularly inhibitors of ICE, through additional steps known in the art.
    Type: Application
    Filed: June 14, 2002
    Publication date: September 18, 2003
    Inventors: Andrea L. C. Robidoux, Siro Serafini, Petra Dieterich, Stephania Leonardi, John Stibbard
  • Patent number: 6559304
    Abstract: The invention relates to a process for simultaneously N(2)-acylating piperazic acid or an ester thereof and forming a bicyclic ring structure. The invention also relates to the use of that process step in a method of synthesizing a bicyclic compound useful as an intermediate for the production of an inhibitor of a caspase, particularly an inhibitor of interleukin-1&bgr; converting enzyme (“ICE”).
    Type: Grant
    Filed: October 13, 2000
    Date of Patent: May 6, 2003
    Assignee: Vertex Pharmaceuticals Incorporated
    Inventors: Andrea L. C. Robidoux, Jeffrey Douglas Wilson, Petra Dieterich, Neil Storer, Stefania Leonardi
  • Publication number: 20010031862
    Abstract: The invention relates to a process for synthesizing piperazic acid and similar, ring-containing acids. The invention also relates to a process for simultaneously N(2)-acylating piperazic acid or an ester thereof and forming a bicyclic ring structure. The invention also relates to the use of either or both processes in a method of synthesizing a bicyclic compound useful as an intermediate for the production of an inhibitor of a caspase, particularly an inhibitor of interleukin-1&bgr; converting enzyme (“ICE”).
    Type: Application
    Filed: February 20, 2001
    Publication date: October 18, 2001
    Inventors: Andrea L.C. Robidoux, Jeffrey Douglas Wilson, Petra Dieterich, Neil Storer, Stefania Leonardi
  • Patent number: 5883282
    Abstract: There is provided a 3-(3-aryloxyphenyl)-1-(substituted methyl)-s-triazine-2,4,6-oxo or thiotrione compound having the structural formula I ##STR1## Further provided are a composition and a method comprising that compound for the control of undesirable plant species.
    Type: Grant
    Filed: May 20, 1997
    Date of Patent: March 16, 1999
    Assignee: American Cyanamid Company
    Inventors: Alvin Donald Crews, Jr., Philip Mark Harrington, Gary Mitchell Karp, Simon David Gill, Petra Dieterich
  • Patent number: 5670641
    Abstract: There is provided a 3-(3-aryloxyphenyl)-1-(substituted methyl)-s-triazine-2,4,6-oxo or thiotrione compound having the structural formula I ##STR1## Further provided are a composition and a method comprising that compound for the control of undesirable plant species.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: September 23, 1997
    Assignee: American Cyanamid Company
    Inventors: Alvin Donald Crews, Jr., Philip Mark Harrington, Gary Mitchell Karp, Simon David Gill, Petra Dieterich
  • Patent number: 5604180
    Abstract: There is provided a 3-(3-aryloxyphenyl)-1-(substituted methyl)-s-triazine-2,4,6-oxo or thiotrione compound having the structural formula I ##STR1## Further provided are a composition and a method comprising that compound for the control of undesirable plant species.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: February 18, 1997
    Inventors: Alvin D. Crews, Jr., Philip M. Harrington, Gary M. Karp, Simon D. Gill, Petra Dieterich
  • Patent number: 5519133
    Abstract: There is provided a 3-(3-aryloxyphenyl)-1-(substituted methyl)-s-triazine-2,4,6-oxo or thiotrione compound having the structural formula I ##STR1## Further provided are a composition and a method comprising that compound for the control of undesirable plant species.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: May 21, 1996
    Assignee: American Cyanamid Co.
    Inventors: Alvin D. Crews, Jr., Philip M. Harrington, Gary M. Karp, Simon D. Gill, Petra Dieterich