Patents by Inventor Mark Stuart Chambers

Mark Stuart Chambers 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: 6730681
    Abstract: A class of substituted or 6,7-ring fused [1, 2, 3]triazolo[1,5-&agr;]-pyrimidine derivatives, possessing an optionally substituted cycloalkyl, phenyl or heteroaryl substituent at the 3-position and an amino moiety at the 5-position, are selective ligands for GABAA receptors, in particular having high affinity for the &agr;2 and/or &agr;3 subunit thereof, and are accordingly of benefit in the treatment and/or prevention of disorders of the central nervous system, including anxiety and convulsions.
    Type: Grant
    Filed: June 14, 2002
    Date of Patent: May 4, 2004
    Assignee: Merck Sharp & Dohme Ltd.
    Inventors: Mark Stuart Chambers, Ian James Collins, Simon Charles Goodacre, David James Hallett, Philip Jones, Linda Elizabeth Keown, Robert James Maxey, Leslie Joseph Street
  • Publication number: 20040043982
    Abstract: The present invention provides a compound of formula (I) wherein A is an optionally substituted C1-4alkylidene group or a bond, R20 and R21 are hydrogen, alkyl groups or heterocyclic groups, R1 and R2 are small substituents or hydrogen, L is O, S or substituted N, X is a 5-or 6-membered heteroaromatic ring, Y is C1-4alkylidene and Z is a 5- or 6-membered heteroaromatic ring; or a pharmaceutically acceptable salt thereof; pharmaceutical compositions comprising it; its use in therapy; its use in making medicaments for treating neurodegenerative disease and methods of using it to enhance cognition.
    Type: Application
    Filed: May 21, 2003
    Publication date: March 4, 2004
    Inventors: Mark Stuart Chambers, Philip Jones, Angus Murray MacLeod, Robert James Maxey, Helen Jane Szekeres
  • Publication number: 20040023964
    Abstract: A class of 7-phenylimidazo[1,2-b][1,2,4]triazine derivatives, substituted at the meta position of the phenyl ring by an optionally substituted aryl or heteroaryl group which is directly attached or bridged by an oxygen atom or a —NH— linkage, being selective ligands for GABAA receptors, in particular having good affinity for the &agr;2 and/or &agr;3 and/or &agr;5 subunit thereof, are accordingly of benefit in the treatment and/or prevention of adverse conditions of the central nervous system, including anxiety, convulsions and cognitive disorders.
    Type: Application
    Filed: May 8, 2003
    Publication date: February 5, 2004
    Inventors: Michela Bettati, Peter Blurton, William Robert Carling, Mark Stuart Chambers, David James Hallett, Andrew Jennings, Richard Thomas Lewis, Michael Geoffrey Neil Russell, Leslie Joseph Street, Helen Jane Szekeres, Monique Bodil Van Neil
  • Publication number: 20040002504
    Abstract: The present invention provides a method of treatment of a subject suffering from a disease, such as schizophrenia, for which the administration of an NK-3 antagonist is indicated which comprises administering to that subject a therapeutically effective amount of a compound of formula I: 1
    Type: Application
    Filed: April 16, 2003
    Publication date: January 1, 2004
    Inventors: Mark Stuart Chambers, Philip Jones, Helen Jane Szekeres
  • Patent number: 6638930
    Abstract: Substituted heterocycles of the general structural formula: are tachykinin receptor antagonists useful in the treatment of inflammatory diseases, pain or migraine, asthma and emesis, and calcium channel blockers useful in the treatment of cardiovascular conditions such as angina, hypertension or ischemia.
    Type: Grant
    Filed: April 17, 2001
    Date of Patent: October 28, 2003
    Assignee: Merck & Co. Inc.
    Inventors: Conrad P. Dorn, Paul E. Finke, Jeffrey J. Hale, Malcolm Maccoss, Sander G. Mills, Shrenik K. Shah, Mark Stuart Chambers, Timothy Harrison, Tamara Ladduwahetty, Brian John Williams
  • Publication number: 20030125333
    Abstract: 1 The present invention provides a compound of formula (I) in which R1 is generally hydrogen or CF3, R2 is generally hydrogen, W is a cyclic amine, a heterocycle or a group L-Y-X where L-Y is a linking portion and X is generally an aromatic or non-aromatic heterocycle, alkyl or alkylcarbonyl and Z is generally a heterocycle such as 5-methylisoxazol-3-yl, and pharmaceutically acceptable salts thereof for enhancing cognition in conditions such as Alzheimer's Disease, pharmaceutical compositions comprising them, their use for manufacturing medicaments and methods of treatment using them.
    Type: Application
    Filed: June 14, 2002
    Publication date: July 3, 2003
    Inventors: Helen Jane Bryant, Mark Stuart Chambers, Philip Jones, Angus Murray MacLeod, Robert James Maxey
  • Publication number: 20030045532
    Abstract: A class of substituted or 6,7-ring fused [1, 2, 3]triazolo[1,5-&agr;]-pyrimidine derivatives, possessing an optionally substituted cycloalkyl, phenyl or heteroaryl substituent at the 3-position and an amino moiety at the 5-position, are selective ligands for GABAA receptors, in particular having high affinity for the &agr;2 and/or ◯subunit thereof, and are accordingly of benefit in the treatment and/or prevention of disorders of the central nervous system, including anxiety and convulsions.
    Type: Application
    Filed: June 14, 2002
    Publication date: March 6, 2003
    Inventors: Mark Stuart Chambers, Ian James Collins, Simon Charles Goodacre, David James Hallett, Philip Jones, Linda Elizabeth Keown, Robert James Maxey, Leslie Joseph Street
  • Publication number: 20020193385
    Abstract: A class of 3-phenylimidazo[1,2-&agr;]pyrimidine derivatives, substituted at the meta position of the phenyl ring by an optionally substituted aryl or heteroaryl group which is directly attached or bridged by an oxygen atom or a —NH— linkage, and further substituted on the phenyl ring by alkyl, trifluoromethyl, alkoxy or one or two halogen atoms, especially fluoro, are selective ligands for GABAA receptors, in particular having good affinity for the &agr;2 and/or &agr;3 and/or &agr;5 subunit thereof, and are accordingly of benefit in the treatment and/or prevention of adverse conditions of the central nervous system, including anxiety, convulsions and cognitive disorders.
    Type: Application
    Filed: March 19, 2002
    Publication date: December 19, 2002
    Inventors: Mark Stuart Chambers, Simon Charles Goodacre, David James Hallett, Andrew Jennings, Philip Jones, Richard Thomas Lewis, Kevin William Moore, Michael Geoffrey Neil Russell, Leslie Joseph Street, Helen Jane Szekeres
  • Patent number: 6395905
    Abstract: 4-oxo-tetrahydroindozole-3-carboxamide compounds according to Formula (I), or a pharmaceutically acceptable salt thereof, are GABA-A Alpha 5 ligands useful for enhancing cognition:
    Type: Grant
    Filed: June 15, 2001
    Date of Patent: May 28, 2002
    Assignee: Merck Sharp & Dohme Ltd.
    Inventors: Helen Jane Bryant, Mark Stuart Chambers
  • Patent number: 6395766
    Abstract: Compounds according to Formula (I) or a pharmaceutically acceptable salt thereof are GABA-A Alpha 5 ligands useful for enhancing cognition: where A is C1-6alkyl, C2-6alkenyl, C2-6alkynyl, C3-6cycloalkyl, arylC1-6alkyl, or aryl wherein the aryl group is optionally substituted by halogen, C1-6alkyl, CF3, CN, NO2 or NH2, NR1R10, S(O)pR1, heteroarylC1-6alkyl or heteroaryl where heteroaryl is a 5- or 6-membered heteroaromatic ring as defined for B; and B is phenyl or a 5-membered ring having one or two unsaturations containing 1, 2, 3, or 4 heteroatoms chosen from O, N and S provided that not more than one heteroatom is other than N, a 6-membered heteroaromatic ring containing 1, 2, 3 or 4 nitrogen atoms, each of which rings is optionally substituted by one or more substituents.
    Type: Grant
    Filed: November 6, 2000
    Date of Patent: May 28, 2002
    Assignee: Merck Sharp & Dohme Limited
    Inventors: Howard Barff Broughton, Helen Jane Bryant, Mark Stuart Chambers, Neil Roy Curtis
  • Patent number: 6355638
    Abstract: Compounds according to Formula (I) or a salt thereof are GABA-A Alpha 5 ligands useful for enhancing cognition:
    Type: Grant
    Filed: November 21, 2000
    Date of Patent: March 12, 2002
    Assignee: Merck Sharp & Dohme Ltd.
    Inventors: Helen Jane Bryant, William Robert Carling, Mark Stuart Chambers, Sarah Christine Hobbs, Philip Jones, Angus Murray MacLeod
  • Publication number: 20020002164
    Abstract: Substituted heterocycles of the general structural formula: 1
    Type: Application
    Filed: April 17, 2001
    Publication date: January 3, 2002
    Applicant: Merck & Co., Inc.
    Inventors: Conrad P. Dorn, Paul E. Finke, Jeffrey J. Hale, Malcolm Maccoss, Sander G. Mills, Shrenik K. Shah, Mark Stuart Chambers, Timothy Harrison, Tamara Ladduwahetty, Brian John Williams
  • Patent number: 6235735
    Abstract: Substituted heterocycles of the general structural formula: are tachykinin receptor antagonists useful in the treatment of inflammatory diseases, pain or migraine, asthma and emesis, and calcium channel blockers useful in the treatment of cardiovascular conditions such as angina, hypertension or ischemia.
    Type: Grant
    Filed: March 16, 2000
    Date of Patent: May 22, 2001
    Assignee: Merck & Co., Inc.
    Inventors: Conrad P. Dorn, Jeffrey J Hale, Paul E. Finke, Malcolm Maccoss, Sander G. Mills, Shrenik K. Shah, Mark Stuart Chambers, Tamara Ladduwahetty, Timothy Harrison, Brian John Williams
  • Patent number: 6156761
    Abstract: The present invention provides a compound of formula (I) or a pharmaceutically acceptable salt thereof: ##STR1## wherein A, B, R2, R3 and q are as defined in the disclosure, pharmaceutical compositions containing them; methods for their production; their use in therapy and methods of treatment of disease states where cognition enhancement is required, such as Alzheimer's disease.
    Type: Grant
    Filed: April 22, 1999
    Date of Patent: December 5, 2000
    Assignee: Merck Sharpe & Dohme Limited
    Inventors: Helen Jane Bryant, Mark Stuart Chambers, Sarah Christine Hobbs
  • Patent number: 6156787
    Abstract: The present invention provides compounds of formula (I) or pharmaceutically acceptable salts thereof: ##STR1## where A is C.sub.1-6 alkyl, C.sub.2-6 alkenyl, C.sub.2-6 alkynyl, C.sub.3-6 cycloalkyl, arylC.sub.1-6 alkyl, aryl, S(O),R.sup.1, OR.sup.1 or NR.sup.1 R.sup.6 ;R.sup.1 is hydrogen; C.sub.1-6 alkyl, C.sub.2-6 alkenyl, C.sub.2-6 alkynyl, C.sub.3-6 cycloalkyl or C.sub.3-6 cycloalkenyl each of which is optionally substituted by amino, C.sub.1-6 alkylamino, di(C.sub.1-6 alkyl)amino, C.sub.1-6 alkoxy, C.sub.1-6 alkylaminocarbonyl, one, two or three hydroxy groups, one, two or three halogen atoms or a four, five or six-membered saturated heterocyclic ring containing a nitrogen atom and optionally either an oxygen atom or a further nitrogen atom which ring is optionally substituted by C.sub.1-4 alkyl on the further nitrogen atom; aryl, arylC.sub.1-6 alkyl, arylC.sub.2-6 alkenyl or arylC.sub.2-6 alkynyl optionally substituted on the aryl ring by halogen, nitro, cyano, C.sub.
    Type: Grant
    Filed: April 22, 1999
    Date of Patent: December 5, 2000
    Assignee: Merck Sharp & Dohme Limited
    Inventors: Howard Barff Broughton, Mark Stuart Chambers
  • Patent number: 6143773
    Abstract: The present invention provides compounds of formula (I) and pharmaceutically acceptable salts thereof: ##STR1## wherein A is C.sub.1-6 alkyl, C.sub.2-6 alkenyl, C.sub.2-6 alkynyl, C.sub.3-6 cycloalkyl, arylC.sub.1-6 alkyl, aryl, S(O).sub.p R.sup.1, OR.sup.1 or NR.sup.1 R.sup.12 ;B is optionally substituted 5- or 6-membered heteroaromatic ring or C(O)NR.sup.10 R.sup.11 ;R.sup.1 is hydrogen, optionally substituted C.sub.1-6 alkyl, C.sub.2-6 alkenyl, C.sub.2-6 alkynyl, C.sub.3-6 cycloalkyl or C.sub.3-6 cycloalkenyl, optionally substituted aryl, arylC.sub.1-6 alkyl, arylC.sub.2-6 alkenyl or arylC.sub.2-6 alkynyl or an optionally substituted 5- or 6-membered heteroaromatic ring;R.sup.2 and R.sup.3 are hydrogen or C.sub.1-6 alkyl;R.sup.4 is hydrogen, C.sub.1-8 alkyl, C.sub.2-8 alkenyl, C.sub.2-8 alkynyl, aryl or CH.sub.2 (CO).sub.m NR.sup.8 R.sup.9 ;R.sup.5 is NR.sup.6 R.sup.7, C.sub.1-6 alkyl or C.sub.1-6 alkoxy;R.sup.6 is independently as defined for R.sup.4 ;R.sup.
    Type: Grant
    Filed: April 22, 1999
    Date of Patent: November 7, 2000
    Assignee: Merck Sharp & Dohme Limited
    Inventors: Howard Barff Broughton, Mark Stuart Chambers
  • Patent number: 6048859
    Abstract: Substituted heterocycles of the general structural formula: ##STR1## are tachykinin receptor antagonists useful in the treatment of inflammatory diseases, pain or migraine, asthma and emesis, and calcium channel blockers useful in the treatment of cardiovascular conditions such as angina, hypertension or ischemia.
    Type: Grant
    Filed: February 16, 1999
    Date of Patent: April 11, 2000
    Assignee: Merck & Co., Inc.
    Inventors: Conrad P. Dorn, Paul E. Finke, Jeffrey J. Hale, Malcolm Maccoss, Sander G. Mills, Shrenik K. Shah, Mark Stuart Chambers, Timothy Harrison, Tamara Ladduwahetty, Brian John Williams
  • Patent number: 5998415
    Abstract: A class of piperazinones, homopiperazinones and thione analogues thereof, substituted at the 1-position by an optionally substituted alkenyl, alkynyl, aryl-alkyl or heteroaryl-alkyl moiety, and linked at the 4-position via an alkylene spacer to a fused bicyclic heteroaromatic moiety, typically indolyl, are selective agonists of 5-HT.sub.1 -like receptors, being potent agonists of the human 5-HT.sub.1D.alpha. receptor subtype while possessing at least a 10-fold selective affinity for the 5-HT.sub.1D.alpha. receptor subtype relative to the 5-HT.sub.1D.beta. subtype; they are therefore useful in the treatment and/or prevention of clinical conditions, in particular migraine and associated disorders, for which a subtype-selective agonist of 5-HT.sub.1D receptors is indicated, while eliciting fewer side-effects, notably adverse cardiovascular events, than those associated with non-subtype-selective 5-HT.sub.1D receptor agonists.
    Type: Grant
    Filed: April 17, 1998
    Date of Patent: December 7, 1999
    Assignee: Merck Sharp & Dohme Ltd.
    Inventors: Mark Stuart Chambers, Sarah Christine Hobbs, Leslie Joseph Street
  • Patent number: 5981529
    Abstract: A class of 1-[3-(1H-indol-3-yl)propyl]-4-(2-phenylethyl)piperazine derivatives, substituted at the 5-position of the indole nucleus by a five-membered heteroaromatic moiety, on one or other of the ethylene carbon atoms of the phenethyl moiety by halogen, trifluoromethyl, alkyl, hydroxyalkyl or alkoxyalkyl, and optionally on the phenyl ring of the phenethyl moiety by halogen, trifluoromethyl, alkoxy or an oxazolidinone group and optionally by one or two further substituents, are selective agonists of 5-HT.sub.1 -like receptors, being potent agonists of the human 5-HT.sub.1D .alpha. receptor subtype whilst possessing at least a 10-fold selective affinity for the 5-HT.sub.1D .alpha. receptor subtype relative to the 5-HT.sub.1D .beta. subtype; they are therefore useful in the treatment and/or prevention of clinical conditions, in particular migraine and associated disorders, for which a subtype-selective agonist of 5-HT.sub.
    Type: Grant
    Filed: March 18, 1998
    Date of Patent: November 9, 1999
    Assignee: Merck Sharp & Dohme Limited
    Inventors: Raymond Baker, Mark Stuart Chambers, Sarah Christine Hobbs, Angus Murray MacLeod, Austin John Reeve, Francine Sternfeld, Leslie Joseph Street
  • Patent number: 5973156
    Abstract: A class of substituted piperidine and tetrahydropyridine derivatives, linked through the 4-position thereof via an alkylene chain to a fused bicyclic heteroaromatic moiety such as indolyl, and further substituted at the 1-position by an optionally substituted alkyl, alkenyl, alkynyl, cycloalkyl-alkyl, aryl-alkyl or heteroaryl-alkyl moiety, are selective agonists of 5-HT.sub.1 -like receptors, being potent agonists of the human 5-HT.sub.1D.spsb..alpha. receptor subtype whilst processing at least a 10-fold selective affinity for the 5-HT.sub.1D.spsb..alpha. receptor subtype relative to the 5-HT.sub.1D.spsb..beta. subtype; they are therefore useful in the treatment and/or prevention of clinical conditions, in particular migraine and associated disorders, for which a subtype-selective agonist of 5-HT.sub.1D receptors is indicated, whilst eliciting fewer side-effects, notably adverse cardiovascular events, than those associated with non-subtype-selective 5-HT.sub.1D receptor agonists.
    Type: Grant
    Filed: May 13, 1998
    Date of Patent: October 26, 1999
    Assignee: Merck Sharp & Dome Ltd.
    Inventors: Mark Stuart Chambers, Sarah Christine Hobbs, Tamara Ladduwahetty, Angus Murray MacLeod, Kevin John Merchant