Patents by Inventor Paul David Leeson

Paul David Leeson 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: 6352994
    Abstract: Compounds according to Formula (I) or a salt thereof are selective ligands for GABAA receptors useful for treatment of disorders of the central nervous system:
    Type: Grant
    Filed: January 4, 2001
    Date of Patent: March 5, 2002
    Assignee: Merck Sharp & Dohme Limited
    Inventors: Ian James Collins, Stephen Robert Fletcher, Timothy Harrison, Paul David Leeson, Christopher Richard Moyes, Alan John Nadin, Michael Rowley, Timothy Jason Sparey, Martin Richard Teall
  • Publication number: 20010018438
    Abstract: Compounds according to Formula (I) or a salt thereof are selective ligands for GABAA receptors useful for treatment of disorders of the central nervous system: 1
    Type: Application
    Filed: January 4, 2001
    Publication date: August 30, 2001
    Applicant: MERCK SHARP & DOHME LIMITED
    Inventors: Ian James Collins, Stephen Robert Fletcher, Timothy Harrison, Paul David Leeson, Christopher Richard Moyes, Alan John Nadin, Michael Rowley, Timothy Jason Sparey, Martin Richard Teall
  • Patent number: 6200982
    Abstract: Substituted 1H-Pyridinyl-2-ones are useful as GABAA-Alpha 2/3 ligands.
    Type: Grant
    Filed: February 11, 2000
    Date of Patent: March 13, 2001
    Assignee: Merck & Dohme Limited
    Inventors: Ian James Collins, Stephen Robert Fletcher, Timothy Harrison, Paul David Leeson, Christopher Richard Moyes, Alan John Nadin, Michael Rowley, Timothy Jason Sparey, Martin Richard Teall
  • Patent number: 6080745
    Abstract: A class of fused tricyclic heteroaromatic compounds of formula (I) as defined in claim 1 or a salt thereof or a prodrug thereof, containing a fused pyrazole, oxazole or pyrimidine ring are ligands for dopamine receptor subtypes within the body and are therefore of use in the treatment and/or prevention of disorders of the dopamine system, such as schizophrenia.
    Type: Grant
    Filed: March 12, 1996
    Date of Patent: June 27, 2000
    Assignee: Merck Sharp & Dohme Limited
    Inventors: William Barnaby Davey, Paul David Leeson, Michael Rowley
  • Patent number: 5939436
    Abstract: A class of heteroaromatic compounds incorporating a substituted five-membered heteroaromatic nucleus which contains at least two nitrogen atoms are ligands for dopamine receptor subtypes within the body and are therefore useful in the treatment and/or prevention of disorders of the dopamine system, in particular schizophrenia and depression.
    Type: Grant
    Filed: June 25, 1997
    Date of Patent: August 17, 1999
    Assignee: Merck Sharp & Dohme Ltd.
    Inventors: William Robert Carling, Paul David Leeson, Kevin William Moore
  • Patent number: 5861407
    Abstract: A class of substituted 1,2,3,6-tetrahydropyridine derivatives are disclosed that are ligands for dopamine receptor subtypes within the body. These compounds are therefore useful in the treatment and/or prevention of disorders of the dopamine system, in particular schizophrenia or depression.
    Type: Grant
    Filed: February 21, 1997
    Date of Patent: January 19, 1999
    Assignee: Merck Sharp & Dohme, Ltd.
    Inventors: Neil Roy Curtis, Janusz Jozef Kulagowski, Paul David Leeson, Ian Michael Mawer, Mark Peter Ridgill
  • Patent number: 5849765
    Abstract: A class of 1,2,3,6-tetrahydropyridine derivatives, substituted in the 4-position by a fused bicyclic heteroaromatic moiety and in the 1-position by an optionally substituted benzyl moiety, are ligands for dopamine receptor subtypes within the body, in particular the D.sub.4 subtype, and are therefore useful in the treatment and/or prevention of disorders of the dopamine system, in particular schizophrenia or depression.
    Type: Grant
    Filed: March 7, 1997
    Date of Patent: December 15, 1998
    Assignee: Merck Sharp & Dohme, Ltd.
    Inventors: Neil Roy Curtis, Janusz Jozef Kulagowski, Paul David Leeson, Kevin William Moore, Andrew Pate Owens, Martin Richard Teall
  • Patent number: 5830901
    Abstract: Disclosed is a class of pyrrolo?2,3-b!pyridine derivatives of formula (I) wherein Q represents a moiety of formula Qa or Qb, which are ligands for dopamine receptor subtypes within the body, in particular the dopamine D4 receptor subtype and are therefore useful in the treatment and/or prevention of disorders of the dopamine system, including schizophrenia.
    Type: Grant
    Filed: January 27, 1997
    Date of Patent: November 3, 1998
    Assignee: Merch Sharp & Dohme Ltd
    Inventors: Neil Roy Curtis, Janusz Jozef Kulagowski, Paul David Leeson, Mark Peter Ridgill
  • Patent number: 5814644
    Abstract: Compound of formula (I), or a pharmaceutically acceptable salt thereof or a prodrug thereof wherein E represents --CH.sub.2 -- or --CH.sub.2 CH.sub.2 --; R represents hydrogen or C.sub.1-6 alkyl; Q represents a moiety of formula Qa, Qb, Qc or Qd which are antagonists of dopamine receptor subtypes within the brain, having a selective affinity for the dopamine D.sub.4 receptor subtype over other dopamine receptor subtypes, and are accordingly of benefit in the treatment and/or prevention of psychotic disorders such as schizophrenia whilst manifesting fewer side-effects than those associated with classical neuroleptic drugs.
    Type: Grant
    Filed: April 8, 1996
    Date of Patent: September 29, 1998
    Assignee: Merck Sharp & Dohme, Ltd.
    Inventors: Janusz Jozef Kulagowski, Paul David Leeson, Mark Peter Ridgill
  • Patent number: 5792768
    Abstract: A class of benzimidazole derivatives, substituted at the 2-position by a substituted piperazinylmethyl or piperazinylethyl moiety, are antagonists of dopamine receptor subtypes within the brain, having a selective affinity for the dopamine D.sub.4 receptor subtype over other dopamine receptor subtypes, and are accordingly of benefit in the treatment and/or prevention of psychotic disorders such as schizophrenia whilst manifesting fewer side-effects than those associated with classical neuroleptic drugs.
    Type: Grant
    Filed: December 20, 1995
    Date of Patent: August 11, 1998
    Assignee: Merck, Sharp & Dohme Limited
    Inventors: Janusz Jozef Kulagowski, Paul David Leeson
  • Patent number: 5780475
    Abstract: Disclosed is a class of 1H-indazole derivatives, substituted at the 3-position by a substituted piperazinylmethyl moiety, which are antagonists of dopamine receptor subtypes within the brain, having a selective affinity for the dopamine D4 receptor subtype over other dopamine receptor subtypes, and are accordingly, of benefit in the treatment and/or prevention of psychotic disorders, such as schizophrenia, while manifesting fewer side-effects than those associated with classical neuroleptic drugs.
    Type: Grant
    Filed: December 29, 1995
    Date of Patent: July 14, 1998
    Assignee: Merck, Sharp & Dohme Limited
    Inventors: Raymond Baker, Janusz Jozef Kulagowski, Paul David Leeson, Adrian Leonard Smith
  • Patent number: 5763448
    Abstract: A class of substituted pyrimidine derivatives are ligands for dopamine receptor subtypes within the body and are therefore useful in the treatment of disorders of the dopamine system, in particular schizophrenia ##STR1##
    Type: Grant
    Filed: March 18, 1996
    Date of Patent: June 9, 1998
    Assignee: Merck, Sharp & Dohme Limited
    Inventors: William Robert Carling, Ian James Collins, Michael Rowley, Paul David Leeson
  • Patent number: 5714498
    Abstract: The invention is directed to substituted benzimidazole compounds which are ligands for dopamine receptor subtypes used in the treatment of the dopamine system.
    Type: Grant
    Filed: September 12, 1995
    Date of Patent: February 3, 1998
    Assignee: Merck, Sharp, & Dohme, Ltd.
    Inventors: Janusz Jozef Kulagowski, Paul David Leeson
  • Patent number: 5712285
    Abstract: A class of pyrrolo?2,3 -b!pyridine derivatives, linked via the 3-position thereof by a methylene group to a tetrahydropyridinyl moiety, the latter moiety being substituted in turn by an aryl- or heteroaryl-substituted divalent monocyclic radical, are ligands for dopamine receptorsubtypes within the body, in particular the D.sub.4 subtype, and are accordingly of use in the treatment and/or prevention of disorders of the dopamine system, including schizophrenia and depression.
    Type: Grant
    Filed: April 3, 1996
    Date of Patent: January 27, 1998
    Assignee: Merck, Sharp & Dohme, Ltd.
    Inventors: Neil Roy Curtis, Janusz Jozef Kulagowski, Paul David Leeson, Mark Peter Ridgill
  • Patent number: 5700809
    Abstract: Compounds of formula I are ligands for dopamine receptor subtypes within the body and are therefore useful in the treatment and/or prevention of disorders of the dopamine system, in particular schizophrenia.
    Type: Grant
    Filed: August 29, 1995
    Date of Patent: December 23, 1997
    Assignee: Merck Sharp & Dohme, Ltd.
    Inventors: Paul David Leeson, Adrian Leonard Smith, Mark Peter Ridgill, Raymond Baker, Neil Roy Curtis, Janusz Jozef Kulagowski
  • Patent number: 5700802
    Abstract: A class of substituted furo?2,3-b!pyridine derivatives are ligands for dopamine receptor subtypes within the body, in particular the D.sub.4 subtype, and are therefore useful in the treatment and/or prevention of disorders of the dopamine system, in particular schizophrenia or depression.
    Type: Grant
    Filed: October 9, 1996
    Date of Patent: December 23, 1997
    Assignee: Merck Sharp & Dohme, Ltd.
    Inventors: Neil Roy Curtis, Janusz Jozef Kulagowski, Paul David Leeson
  • Patent number: 5686480
    Abstract: A class of fused tricyclic heteroaromatic compounds of formula (I), or a salt thereof or a prodrug thereof containing a fused pyrazole ring are ligands for dopamine receptor subtypes within the body and are therefore of use in the treatment and/or prevention of disorders of the dopamine system, such as schizophrenia.
    Type: Grant
    Filed: March 1, 1996
    Date of Patent: November 11, 1997
    Assignee: Merck, Sharp & Dohme, Ltd.
    Inventors: Ian James Collins, Paul David Leeson, Michael Rowley
  • Patent number: 5684006
    Abstract: A class of substituted isoxazole and pyrazole derivatives of formula (I), or a salt thereof of or a prodrug thereof, wherein the broken circle represents two non-adjacent double bonds whereby the five-membered ring containing X and Y is aromatic; one of X and Y represents nitrogen, and the other of X and Y represents oxygen or N--R.sup.5 ; R.sup.1 represents hydrogen, C.sub.1-6 alkyl or trifluoromethyl; R.sup.2 and R.sup.3 independently represent hydrogen, hydrocarbon, a heterocyclic group, halogen, cyano, trifluoromethyl, nitro, --OR.sup.a, --SR.sup.a, --SOR.sup.a, --SO.sub.2 R.sup.a, --SO.sub.2 NR.sup.a R.sup.b, --NR.sup.a R.sup.a, --NR.sup.a CO.sub.2 R.sup.b, --COR.sup.a, --CO.sub.2 R.sup.a or --CONR.sup.a R.sup.b, R.sup.4 represents hydrocarbon or a heterocyclic group; R.sup.5 represents hydrogen or C.sub.1-6 alkyl; and R.sup.a and R.sup.
    Type: Grant
    Filed: May 14, 1996
    Date of Patent: November 4, 1997
    Assignee: Merck, Sharp & Dohme, Ltd.
    Inventors: Sylvie Bourrain, Joseph George Neduvelil, Paul David Leeson, Graham Andrew Showell
  • Patent number: 5681836
    Abstract: The methanesulfonate salt of a class of antipsychotic compounds comprising a benzo?b!furan moiety and a substituted heterocyclic moiety, linked via the 3-position of the benzo?b!furan moiety by a methylene group, which are antagonists of dopamine receptor subtypes within the brain, being extremely potent antagonists of the human dopamine D.sub.4 receptor subtype and having a selective affinity for the D.sub.4 subtype over other dopamine receptor subtypes, possess advantageous qualities in terms of their improved aqueous solubility relative to the corresponding free base and, as such, provide for greater ease of formulation and display enhanced pharmacokinetic properties, including oral absorption.
    Type: Grant
    Filed: October 9, 1996
    Date of Patent: October 28, 1997
    Assignee: Merck, Sharp & Dohme, Ltd.
    Inventors: Neil Roy Curtis, Janusz Jozef Kulagowski, Paul David Leeson
  • Patent number: 5665732
    Abstract: A class of chemical compounds comprising a 1-H-indazole moiety and a substituted heterocyclic moiety, linked via the 3-position of the indazole moiety by a methylene group, are ligands for dopamine receptor subtypes within the body and are therefore useful in the treatment and/or prevention of disorders of the dopamine system, in particular schizophrenia. In formula (I) R represents hydrogen or C.sub.1-6 alkyl, Q represents a moiety of formula Qa, Qb, or Qc.
    Type: Grant
    Filed: September 8, 1995
    Date of Patent: September 9, 1997
    Assignee: Merck, Sharp & Dohme Ltd.
    Inventors: Raymond Baker, Janusz Jozef Kulagowski, Paul David Leeson, Adrian Leonard Smith