Patents by Inventor David Winter Walker

David Winter Walker 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: 10973817
    Abstract: This invention relates to compounds that inhibit or modulate the activity of Chk-1 kinase. Also provided are pharmaceutical compositions containing the compounds and the therapeutic uses of the compounds.
    Type: Grant
    Filed: May 31, 2018
    Date of Patent: April 13, 2021
    Assignee: SENTINEL ONCOLOGY LIMITED
    Inventors: Robert George Boyle, David Winter Walker, Richard Justin Boyce, Scott Peterson, Francine Farouz, Cong Hung Vo
  • Publication number: 20200247796
    Abstract: The invention provides compounds of the formula (3): or a pharmaceutically acceptable salt or tautomer thereof, wherein: Z is a 5-membered heteroaryl ring containing one or two nitrogen ring members and optionally one further heteroatom ring member selected from N and O; ring X is a benzene or pyridine ring; ring Y is a benzene, pyridine, thiophene or furan ring; Ar1 is an optionally substituted benzene, pyridine, thiophene or furan ring; m is 0, 1 or 2; n is 0, 1 or 2; R1 is selected from various substituents: R2 is selected from hydrogen and a C1-4 hydrocarbon group; R3 is selected from hydrogen and a C1-4 hydrocarbon group; R4 is selected from various substituents; R5 is selected from various substituents; Ar2 is an optionally substituted phenyl, pyridyl or pyridone group; R6 is a group Q1-Ra—Rb; Q1 is absent or is a C1-3 saturated hydrocarbon linker; Ra is selected from O; C(O); C(O)O; CONRc; N(Rc)CO; N(Rc)CONRc, NRc; and SO2NRc; Rb is selected from hydrogen and various substituents;
    Type: Application
    Filed: April 27, 2018
    Publication date: August 6, 2020
    Applicant: SENTINEL ONCOLOGY LIMITED
    Inventors: Robert George BOYLE, David Winter WALKER, Richard Justin BOYCE
  • Patent number: 10730882
    Abstract: The invention provides compound that inhibit or modulate the activity of p70S6 kinase, the compounds being of the formula (1): or a salt, tautomer or N-oxide thereof; wherein: one of Y and Z is R3 and the other is Ar2; Q1 is an optionally substituted C1-8 alkylene group; and wherein a carbon atom of the C1-8 alkylene group may optionally be replaced by a cyclopropane-1,1-diyl or cyclobutane-1,1-diyl group provided that the total number of carbon atoms in an alkylene group containing such a replacement does not exceed 8; Q2 is a bond or an optionally substituted C1-8 alkylene group R1 is selected from hydrogen, NRxRy and a group Cy1; Rx and Ry are each is selected from hydrogen, C1-4 hydrocarbyl or hydroxy-C1-4 hydrocarbyl; or NRxRy forms an optionally substituted 4 to 7-membered heterocyclic ring; Cy1 is an optionally substituted C-linked 3 to 7 membered monocyclic non-aromatic carbocyclic or heterocyclic; R2 and R4 are each is selected from hydrogen, fluorine, chlorine, optionally substituted C1-2 al
    Type: Grant
    Filed: June 14, 2019
    Date of Patent: August 4, 2020
    Assignee: SENTINEL ONCOLOGY LIMITED
    Inventors: Robert George Boyle, David Winter Walker
  • Publication number: 20190292195
    Abstract: The invention provides compound that inhibit or modulate the activity of p70S6 kinase, the compounds being of the formula (1): or a salt, tautomer or N-oxide thereof; wherein: one of Y and Z is R3 and the other is Ar2; Q1 is an optionally substituted C1-8 alkylene group; and wherein a carbon atom of the C1-8 alkylene group may optionally be replaced by a cyclopropane-1,1-diyl or cyclobutane-1,1-diyl group provided that the total number of carbon atoms in an alkylene group containing such a replacement does not exceed 8; Q2 is a bond or an optionally substituted C1-8 alkylene group R1 is selected from hydrogen, NRxRy and a group Cy1; Rx and Ry are each is selected from hydrogen, C1-4 hydrocarbyl or hydroxy-C1-4 hydrocarbyl; or NRxRy forms an optionally substituted 4 to 7-membered heterocyclic ring; Cy1 is an optionally substituted C-linked 3 to 7 membered monocyclic non-aromatic carbocyclic or heterocyclic; R2 and R4 are each is selected from hydrogen, fluorine, chlorine, optionally substituted C1-2 al
    Type: Application
    Filed: June 14, 2019
    Publication date: September 26, 2019
    Applicant: SENTINEL ONCOLOGY LIMITED
    Inventors: Robert George BOYLE, David Winter WALKER
  • Patent number: 10344033
    Abstract: The invention provides compound that inhibit or modulate the activity of p70S6 kinase, the compounds being of the formula (1): or a salt, tautomer or N-oxide thereof; wherein: one of Y and Z is R3 and the other is Ar2; Q1 is an optionally substituted C1-8 alkylene group; and wherein a carbon atom of the C1-8 alkylene group may optionally be replaced by a cyclopropane-1,1-diyl or cyclobutane-1,1-diyl group provided that the total number of carbon atoms in an alkylene group containing such a replacement does not exceed 8; Q2 is a bond or an optionally substituted C1-8 alkylene group R1 is selected from hydrogen, NRxRy and a group Cy1; Rx and Ry are each is selected from hydrogen, C1-4 hydrocarbyl or hydroxy-C1-4 hydrocarbyl; or NRxRy forms an optionally substituted 4 to 7-membered heterocyclic ring; Cy1 is an optionally substituted C-linked 3 to 7 membered monocyclic non-aromatic carbocyclic or heterocyclic; R2 and R4 are each is selected from hydrogen, fluorine, chlorine, optionally substituted C1-2 al
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: July 9, 2019
    Assignee: SENTINEL ONCOLOGY LIMITED
    Inventors: Robert George Boyle, David Winter Walker
  • Publication number: 20180370975
    Abstract: The invention provides compound that inhibit or modulate the activity of p70S6 kinase, the compounds being of the formula (1): or a salt, tautomer or N-oxide thereof; wherein: one of Y and Z is R3 and the other is Ar2; Q1 is an optionally substituted C1-8 alkylene group; and wherein a carbon atom of the C1-8 alkylene group may optionally be replaced by a cyclopropane-1,1-diyl or cyclobutane-1,1-diyl group provided that the total number of carbon atoms in an alkylene group containing such a replacement does not exceed 8; Q2 is a bond or an optionally substituted C1-8 alkylene group R1 is selected from hydrogen, NRxRy and a group Cy1; Rx and Ry are each is selected from hydrogen, C1-4 hydrocarbyl or hydroxy-C1-4 hydrocarbyl; or NRxRy forms an optionally substituted 4 to 7-membered heterocyclic ring; Cy1 is an optionally substituted C-linked 3 to 7 membered monocyclic non-aromatic carbocyclic or heterocyclic; R2 and R4 are each is selected from hydrogen, fluorine, chlorine, optionally substituted C1-2 alkyl
    Type: Application
    Filed: September 30, 2016
    Publication date: December 27, 2018
    Applicant: SENTINEL ONCOLOGY LIMITED
    Inventors: Robert George BOYLE, David Winter WALKER
  • Patent number: 10144726
    Abstract: The invention provides compounds for use in the treatment of a disease or condition selected from brain disorders and triple-negative breast cancer, the compounds being of the formula (1): or a salt or tautomer thereof; wherein: X1 is N or N+(O?); X2 is N or CH; Q is selected from a C1-3 alkylene group, cyclopropane-1,1-diyl and cyclobutane-1,1-diyl; R1 is selected from hydrogen and C1-4 alkyl; R2, R3 and R4 are the same or different and each is selected from hydrogen and fluorine; Ar1 is a benzene, thiophene, naphthyl or pyridine ring optionally substituted with 1, 2 or 3 substituents selected from fluorine; chlorine; bromine; C1-4 hydrocarbyl; C1-4 hydrocarbyloxy; trifluoromethyl; difluoromethyl; cyano; trifluoromethoxy; difluoromethoxy; Ar2 is a monocyclic 5- or 6-membered heteroaryl ring containing 1, 2 or 3 heteroatom ring members selected from O, N and S and being optionally substituted with 1, 2 or 3 substituents selected from fluorine; C1-4 hydrocarbyl; amino; mono-C1-4 hydrocarbylamino and di
    Type: Grant
    Filed: February 15, 2016
    Date of Patent: December 4, 2018
    Assignee: SENTINEL ONCOLOGY LIMITED
    Inventors: Robert George Boyle, David Winter Walker
  • Publication number: 20180271860
    Abstract: This invention relates to compounds that inhibit or modulate the activity of Chk-1 kinase. Also provided are pharmaceutical compositions containing the compounds and the therapeutic uses of the compounds.
    Type: Application
    Filed: May 31, 2018
    Publication date: September 27, 2018
    Applicant: Cascadian Therapeutics, Inc.
    Inventors: Robert George BOYLE, David Winter WALKER, Richard Justin BOYCE, Scott PETERSON, Francine FAROUZ, Cong Hung VO
  • Patent number: 10010547
    Abstract: This invention relates to compounds that inhibit or modulate the activity of Chk-1 kinase. Also provided are pharmaceutical compositions containing the compounds and the therapeutic uses of the compounds.
    Type: Grant
    Filed: February 9, 2015
    Date of Patent: July 3, 2018
    Assignee: Cascadian Therapeutics, Inc.
    Inventors: Robert George Boyle, David Winter Walker, Richard Justin Boyce, Scott Peterson, Francine Farouz, Cong Hung Vo
  • Publication number: 20180022735
    Abstract: The invention provides compounds for use in the treatment of a disease or condition selected from brain disorders and triple-negative breast cancer, the compounds being of the formula (1): or a salt or tautomer thereof; wherein: X1 is N or N+(O?); X2 is N or CH; Q is selected from a C1-3 alkylene group, cyclopropane-1,1-diyl and cyclobutane-1,1-diyl; R1 is selected from hydrogen and C1-4 alkyl; R2, R3 and R4 are the same or different and each is selected from hydrogen and fluorine; Ar1 is a benzene, thiophene, naphthyl or pyridine ring optionally substituted with 1, 2 or 3 substituents selected from fluorine; chlorine; bromine; C1-4 hydrocarbyl; C1-4 hydrocarbyloxy; trifluoromethyl; difluoromethyl; cyano; trifluoromethoxy; difluoromethoxy; Ar2 is a monocyclic 5- or 6-membered heteroaryl ring containing 1, 2 or 3 heteroatom ring members selected from O, N and S and being optionally substituted with 1, 2 or 3 substituents selected from fluorine; C1-4 hydrocarbyl; amino; mono-C1-4 hydrocarbylamino and di-
    Type: Application
    Filed: February 15, 2016
    Publication date: January 25, 2018
    Applicant: SENTINEL ONCOLOGY LIMITED
    Inventors: Robert George BOYLE, David Winter WALKER
  • Publication number: 20160361310
    Abstract: This invention relates to compounds that inhibit or modulate the activity of Chk-1 kinase. Also provided are pharmaceutical compositions containing the compounds and the therapeutic uses of the compounds.
    Type: Application
    Filed: February 9, 2015
    Publication date: December 15, 2016
    Inventors: Robert George BOYLE, David Winter WALKER, Richard Justin BOYCE, Scott PETERSON, Francine FAROUZ, Cong Hung VO
  • Publication number: 20160250187
    Abstract: The invention provides compounds of the formula (I) having protein kinase B inhibiting activity: wherein A is a saturated hydrocarbon linker group containing from 1 to 7 carbon atoms, the linker group having a maximum chain length of 5 atoms extending between R1 and NR2R3 and a maximum chain length of 4 atoms extending between E and NR2R3, wherein one of the carbon atoms in the linker group may optionally be replaced by an oxygen or nitrogen atom; and wherein the carbon atoms of the linker group A may optionally bear one or more substituents selected from oxo, fluorine and hydroxy, provided that the hydroxy group when present is not located at a carbon atom ? with respect to the NR2R3 group and provided that the oxo group when present is located at a carbon atom ? with respect to the NR2R3 group; E is a monocyclic or bicyclic carbocyclic or heterocyclic group; R1 is an aryl or heteroaryl group; and R2, R3, R4 and R5 are as defined in the claims.
    Type: Application
    Filed: January 29, 2016
    Publication date: September 1, 2016
    Applicants: Astex Therapeutics Ltd, The Institute of Cancer Research: Royal Cancer Hospital, Cancer Research Technology Limited
    Inventors: Valerio BERDINI, Gordon SAXTY, Marinus Leendert VERDONK, Steven John WOODHEAD, Paul Graham WYATT, Robert George BOYLE, Hannah Fiona SORE, David Winter WALKER, Ian COLLINS, Robert DOWNHAM, Robin Arthur Ellis CARR
  • Patent number: 9283226
    Abstract: The invention provides compounds of the formula (I) having protein kinase B inhibiting activity: wherein A is a saturated hydrocarbon linker group containing from 1 to 7 carbon atoms, the linker group having a maximum chain length of 5 atoms extending between R1 and NR2R3 and a maximum chain length of 4 atoms extending between E and NR2R3, wherein one of the carbon atoms in the linker group may optionally be replaced by an oxygen or nitrogen atom; and wherein the carbon atoms of the linker group A may optionally bear one or more substituents selected from oxo, fluorine and hydroxy, provided that the hydroxy group when present is not located at a carbon atom ? with respect to the NR2R3 group and provided that the oxo group when present is located at a carbon atom ? with respect to the NR2R3 group; E is a monocyclic or bicyclic carbocyclic or heterocyclic group; R1 is an aryl or heteroaryl group; and R2, R3, R4 and R5 are as defined in the claims.
    Type: Grant
    Filed: February 14, 2014
    Date of Patent: March 15, 2016
    Assignees: ASTEX THERAPEUTICS LIMITED, THE INSTITUTE OF CANCER RESEARCH: ROYAL CANCER HOSPITAL, CANCER RESEARCH TECHNOLOGY LIMITED
    Inventors: Valerio Berdini, Gordon Saxty, Marinus Leendert Verdonk, Steven John Woodhead, Paul Graham Wyatt, Robert George Boyle, Hannah Fiona Sore, David Winter Walker, Ian Collins, Robert Downham, Robin Arthur Ellis Carr
  • Patent number: 9006430
    Abstract: The invention provides a compound for use as a protein kinase B inhibitor, the compound being a compound of the formula (I) or salts, solvates, tautomers or N-oxides thereof, wherein T is N or CR5; J1-J2 is N?C(R6), (R7)C?N, (R8)N—C(O), (R8)2C—C(O), N?N or (R7)C?C(R6); E is a monocyclic carbocyclic or heterocyclic group of 5 or 6 ring members, the heterocyclic group containing up to 3 heteroatoms selected from O, N and S; Q1 is a bond or a saturated C1-3 hydrocarbon linker group, one of the carbon atoms in the linker group being optionally be replaced by an oxygen or nitrogen atom, or an adjacent pair of carbon atoms may be replaced by CONRq or NRqCO where Rq is hydrogen or methyl, or Rq is a C1-4 alkylene chain linked to R or a carbon atom of Q1 to form a cyclic moiety; and wherein the carbon atoms of the linker group Q1 may optionally bear one or more substituents selected from fluorine and hydroxy; Q2 is a bond or a saturated hydrocarbon linker group containing from 1 to 3 carbon atoms, wherein one of the
    Type: Grant
    Filed: June 20, 2014
    Date of Patent: April 14, 2015
    Assignees: Astex Therapeutics Limited, The Institute of Cancer Research: Royal Cancer Hospital, Cancer Research Technology Limited
    Inventors: Valerio Berdini, Robert George Boyle, Gordon Saxty, David Winter Walker, Steven John Woodhead, Paul Graham Wyatt, Alastair Donald, John Caldwell, Ian Collins, Tatiana Faria Da Fonseca
  • Publication number: 20140303177
    Abstract: The invention provides a compound for use as a protein kinase B inhibitor, the compound being a compound of the formula (I) or salts, solvates, tautomers or N-oxides thereof, wherein T is N or CR5; J1-J2 is N?C(R6), (R7)C?N, (R8)N—C(O), (R8)2C—C(O), N?N or (R7)C?C(R6); E is a monocyclic carbocyclic or heterocyclic group of 5 or 6 ring members, the heterocyclic group containing up to 3 heteroatoms selected from O, N and S; Q1 is a bond or a saturated C1-3 hydrocarbon linker group, one of the carbon atoms in the linker group being optionally be replaced by an oxygen or nitrogen atom, or an adjacent pair of carbon atoms may be replaced by CONRq or NRqCO where Rq is hydrogen or methyl, or Rq is a C1-4 alkylene chain linked to R or a carbon atom of Q1 to form a cyclic moiety; and wherein the carbon atoms of the linker group Q1 may optionally bear one or more substituents selected from fluorine and hydroxy; Q2 is a bond or a saturated hydrocarbon linker group containing from 1 to 3 carbon atoms, wherein one of the
    Type: Application
    Filed: June 20, 2014
    Publication date: October 9, 2014
    Applicants: ASTEX THERAPEUTICS LIMITED, THE INSTITUTE OF CANCER RESEARCH: ROYAL CANCER HOSPITAL, CANCER RESEARCH TECHNOLOGY LIMITED
    Inventors: Valerio BERDINI, Robert George BOYLE, Gordon SAXTY, David Winter WALKER, Steven John WOODHEAD, Paul Graham WYATT, Alastair DONALD, John CALDWELL, Ian COLLINS, Tatiana Faria DA FONSECA
  • Publication number: 20140271662
    Abstract: The invention provides compounds of the formula (I) having protein kinase B inhibiting activity: wherein A is a saturated hydrocarbon linker group containing from 1 to 7 carbon atoms, the linker group having a maximum chain length of 5 atoms extending between R1 and NR2R3 and a maximum chain length of 4 atoms extending between E and NR2R3, wherein one of the carbon atoms in the linker group may optionally be replaced by an oxygen or nitrogen atom; and wherein the carbon atoms of the linker group A may optionally bear one or more substituents selected from oxo, fluorine and hydroxy, provided that the hydroxy group when present is not located at a carbon atom ? with respect to the NR2R3 group and provided that the oxo group when present is located at a carbon atom ? with respect to the NR2R3 group; E is a monocyclic or bicyclic carbocyclic or heterocyclic group; R1 is an aryl or heteroaryl group; and R2, R3, R4 and R5 are as defined in the claims.
    Type: Application
    Filed: February 14, 2014
    Publication date: September 18, 2014
    Applicants: Astex Therapeutics Ltd, Cancer Research Technology Limited, The Institute of Cancer Research: Royal Cancer Hospital
    Inventors: Valerio BERDINI, Gordon SAXTY, Marinus Leendert VERDONK, Steven John WOODHEAD, Paul Graham WYATT, Robert George BOYLE, Hannah Fiona SORE, David Winter WALKER, Ian COLLINS, Robert DOWNHAM, Robin Arthur Ellis CARR
  • Patent number: 8809336
    Abstract: The invention provides a compound for use as a protein kinase B inhibitor, the compound being a compound of the formula (I) or salts, solvates, tautomers or N-oxides thereof, wherein T is N or CR5; J1-J2 is N?C(R6), (R7)C?N, (R8)N—C(O), (R8)2C—C(O), N?N or (R7)C?C(R6); E is a monocyclic carbocyclic or heterocyclic group of 5 or 6 ring members, the heterocyclic group containing up to 3 heteroatoms selected from O, N and S; Q1 is a bond or a saturated C1-3 hydrocarbon linker group, one of the carbon atoms in the linker group being optionally be replaced by an oxygen or nitrogen atom, or an adjacent pair of carbon atoms may be replaced by CONRq or NRqCO where Rq is hydrogen or methyl, or Rq is a C1-4 alkylene chain linked to R1 or a carbon atom of Q1 to form a cyclic moiety; and wherein the carbon atoms of the linker group Q1 may optionally bear one or more substituents selected from fluorine and hydroxy; Q2 is a bond or a saturated hydrocarbon linker group containing from 1 to 3 carbon atoms, wherein one of the
    Type: Grant
    Filed: September 4, 2013
    Date of Patent: August 19, 2014
    Assignees: Astex Therapeutics Limited, The Institute of Cancer Research: Royal Cancer Hospital, Cancer Research Technology Limited
    Inventors: Valerio Berdini, Robert George Boyle, Gordon Saxty, David Winter Walker, Steven John Woodhead, Paul Graham Wyatt, Alastair Donald, John Caldwell, Ian Collins, Tatiana Faria Da Fonseca
  • Patent number: 8716473
    Abstract: The invention provides compounds of the formula (1): or salts or tautomers thereof; wherein X1 is N or N+(O?); X2 is N or CH; Q is a C1-3 alkylene group; R1 is selected from hydrogen, C1-4 hydrocarbyl and hydroxy-C2-4 hydrocarbyl; R2, R3 and R4 are the same or different and each is selected from hydrogen, fluorine, chlorine and methyl; Ar1 is an optionally substituted monocyclic 5 or 6-membered aryl or heteroaryl ring containing 0, 1 or 2 heteroatom ring members selected from O, N and S, or a naphthyl ring and Ar2 is an optionally substituted monocyclic 5 or 6-membered heteroaryl ring containing 1, 2 or 3 heteroatom ring members selected from O, N and S. The compounds of formula (1) are inhibitors of p70S6 kinase and are useful in the treatment of proliferative diseases.
    Type: Grant
    Filed: May 26, 2010
    Date of Patent: May 6, 2014
    Assignee: Sentinel Oncology Limited
    Inventors: Robert George Boyle, David Winter Walker
  • Patent number: 8716287
    Abstract: A compound of the formula (I):
    Type: Grant
    Filed: May 12, 2011
    Date of Patent: May 6, 2014
    Assignee: Sentinel Oncology Limited
    Inventors: Robert George Boyle, David Winter Walker, Richard Justin Boyce
  • Publication number: 20140107137
    Abstract: The invention provides a compound for use as a protein kinase B inhibitor, the compound being a compound of the formula (I) or salts, solvates, tautomers or N-oxides thereof, wherein T is N or CR5; J1-J2 is N?C(R6), (R7)C?N, (R8)N—C(O), (R8)2C—C(O), N?N or (R7)C?C(R6); E is a monocyclic carbocyclic or heterocyclic group of 5 or 6 ring members, the heterocyclic group containing up to 3 heteroatoms selected from O, N and S; Q1 is a bond or a saturated C1-3 hydrocarbon linker group, one of the carbon atoms in the linker group being optionally be replaced by an oxygen or nitrogen atom, or an adjacent pair of carbon atoms may be replaced by CONRq or NRqCO where Rq is hydrogen or methyl, or Rq is a C1-4 alkylene chain linked to R1 or a carbon atom of Q1 to form a cyclic moiety; and wherein the carbon atoms of the linker group Q1 may optionally bear one or more substituents selected from fluorine and hydroxy; Q2 is a bond or a saturated hydrocarbon linker group containing from 1 to 3 carbon atoms, wherein one of the
    Type: Application
    Filed: September 4, 2013
    Publication date: April 17, 2014
    Inventors: Valerio BERDINI, Robert George BOYLE, Gordon SAXTY, David Winter WALKER, Steven John WOODHEAD, Paul Graham WYATT, Alistair DONALD, John CALDWELL, Ian COLLINS, Tatiana Faria DA FONSECA