Patents by Inventor Robert I. Dowell
Robert I. Dowell 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).
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Publication number: 20040176386Abstract: Compounds of the formula I 1Type: ApplicationFiled: February 26, 2004Publication date: September 9, 2004Applicant: AstraZeneca ABInventors: Christophe B. Barlaam, Robert I. Dowell, Maurice R.V. Finlay, Nicholas J. Newcombe, Howard Tucker, David Waterson
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Patent number: 6734183Abstract: Compounds of the formula I useful as metalloproteinase inhibitors, especially as inhibitors of MMP 13.Type: GrantFiled: February 21, 2001Date of Patent: May 11, 2004Assignee: AstraZeneca ABInventors: Christophe B Barlaam, Robert I Dowell, Maurice R V Finlay, Nicholas J Newcombe, Howard Tucker, David Waterson
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Patent number: 6552223Abstract: A compound of the formula (I): R1—CO—N(OH)—CR2R3—CR4R5—CONH—CR6R7—CONR8R9 (I) wherein: R1 is C1-6alkyl, aryl or arylC1-6alkyl; R2 is hydrogen, C1-6alkyl, C3-8cycloalkyl, aryl or arylC1-6alkyl; R3 is hydrogen, C1-6alkyl or arylC1-6alkyl; or R2 and R3, together with the carbon atom to which they are joined, form a C3-8cycloalkyl ring; R4 is benzyl, phenethyl, phenylpropyl, phenylbutyl or flurophenylbutyl; R5 is hydrogen, C1-6alkyl or arylC1-6alkyl; R6 is hydrogen, C1-6alkyl, C2-6alkenyl, C3-8cycloalkylC1-6alkyl, arylC1-6alkyl, heteroarylC1-6alkyl or the side-chain of a naturally occurring amino acid; R7 is hydrogen or C1-6alkyl; R8 is hydrogen, C1-6alkyl, C3-8cycloalkyl, C3-8cycloalkenyl, arylC1-6alkyl, heteroarylC1-6alkyl or heterocyclylC1-6alkyl; R9 is hydrogen or C1-6alkyl; or R8 and R9, together with the nitrogen atom to which they are joined, form a heterocyclic ring; wherein any group or ring in R1-R9 is optionally substituted; or a pharmaType: GrantFiled: February 26, 2001Date of Patent: April 22, 2003Assignee: AstraZeneca ABInventors: Rebecca J Cartwright, Robert I Dowell
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Publication number: 20020022628Abstract: Compounds of the formula I 1Type: ApplicationFiled: February 21, 2001Publication date: February 21, 2002Inventors: Christophe B. Barlaam, Robert I. Dowell, Maurice R.V. Finlay, Nicholas J. Newcombe, Howard Tucker, David Waterson
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Patent number: 5587161Abstract: Prodrugs, of generic formula I, are disclosed for use in antibody directed enzyme prodrug therapy (ADEPT).Type: GrantFiled: December 21, 1994Date of Patent: December 24, 1996Assignees: Zeneca Limited, Cancer Research Campaign Technology LimitedInventors: Philip J. Burke, Robert I. Dowell, Anthony B. Mauger, Caroline J. Springer
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Patent number: 5407945Abstract: The invention concerns a cyclic ether derivative of the formula I ##STR1## wherein Ar.sup.1 is optionally substituted phenyl, naphthyl or a 9- or 10-membered bicyclic heterocyclic moiety;A.sup.1 is a direct link to X.sup.1 or (1-3C)alkylene;X.sup.1 is oxy, thio, sulphinyl, sulphonyl or imino;Ar.sup.2 is optionally substituted phenylene or pyridylene;R.sup.1 includes hydrogen, (1-4C)alkyl, (1-4C)alkoxycarbonyl and (1-4C)alkylthio; andR.sup.2 and R.sup.3 together form a group of the formula --A.sup.2 --X.sup.2 --A.sup.3 -- which, together with the carbon atom to which A.sup.2 and A.sup.3 are attached, defines a ring having 5 to 7 ring atoms, wherein each of A.sup.2 and A.sup.3 is (1-3C)alkylene and X.sup.2 is oxy, thio, sulphinyl or sulphonyl;or a pharmaceutically-acceptable salt thereof.The compounds of the invention are inhibitors of the enzyme 5-lipoxygenase.Type: GrantFiled: July 30, 1993Date of Patent: April 18, 1995Assignees: Imperial Chemical Industries, Inc., ICI-PharmaInventors: Pierre A. R. Bruneau, Robert I. Dowell, David Waterson
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Patent number: 5405990Abstract: Prodrugs, of generic formula I, are disclosed for use in antibody directed enzyme prodrug therapy (ADEPT). The prodrugs are substrates for carboxypeptidase G2 (CPG2) and yield more active cytotoxic drugs than known products of CPG2 catalyzed reactions.Type: GrantFiled: July 22, 1993Date of Patent: April 11, 1995Assignees: Zeneca Limited, Cancer Research Campaign Technology LimitedInventors: Philip J. Burke, Robert I. Dowell, Anthony B. Mauger, Caroline J. Springer
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Patent number: 5276037Abstract: The invention concerns an aryl derivative of the formula I, ##STR1## wherein Ar.sup.1 is optionally substituted phenyl, naphthyl or a heterocyclic moiety, and X.sup.1 is oxy, thio, sulphinyl, sulphonyl, difluoromethylene, imino, (1-4C)alkylimino or optionally substituted (1-4C)alkylene, or X.sup.1 is a group of the formula--X.sup.4 --CR.sub.2 -- or --CR.sub.2 --X.sup.4 --whereinX.sup.4 is oxy, thio, sulphinyl, sulphonyl or carbonyl and each R is hydrogen, methyl or ethyl;each of Ar.sup.2 and Ar.sup.3 is optionally substituted phenylene;X.sup.2 is oxy, thio, sulphinyl or sulphonyl;R.sup.1 is (1-4C)alkyl; andR.sup.2 and R.sup.3 together form a group of the formula --A.sup.1 --X.sup.3 --A.sup.2 -- which together with the carbon atom to which A.sup.1 and A.sup.2 are attached define a ring having 5 to 7 ring atoms, wherein each of A.sup.1 and A.sup.2 is (1-3C)alkylene and X.sup.Type: GrantFiled: April 14, 1993Date of Patent: January 4, 1994Assignees: Imperial Chemical Industries PLC, ICI PharmaInventors: Robert I. Dowell, Philip N. Edwards, Keith Oldham
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Patent number: 5272173Abstract: The invention concerns an aryl derivative of the formula I, ##STR1## wherein Ar.sup.1 is optionally substituted phenyl, naphthyl or a heterocyclic moiety, and X.sup.1 is oxy, thio, sulphinyl, sulphonyl, difluoromethylene, imino, (1-4C)alkylimino or optionally substituted (1-4C)alkylene, or X.sup.1 is a group of the formula--X.sup.4 --CR.sub.2 -- or --CR.sub.2 --X.sup.4 --wherein X.sup.4 is oxy, thio, sulphinyl, sulphonyl or carbonyl and each R is hydrogen, methyl or ethyl;each of Ar.sup.2 and Ar.sup.3 is optionally substituted phenylene;X.sup.2 is oxy, thio, sulphinyl or sulphonyl;R.sup.1 is (1-4C)alkyl; andR.sup.2 and R.sup.3 together form a group of the formula --A.sup.1 --X.sup.3 --A.sup.2 -- which together with the carbon atom to which A.sup.1 and A.sup.2 are attached define a ring having 5 to 7 ring atoms, wherein each of A.sup.1 and A.sup.2 is (1-3C)alkylene and X.sup.Type: GrantFiled: April 14, 1993Date of Patent: December 21, 1993Assignees: Imperial Chemical Industries PLC, Ici PharmaInventors: Robert I. Dowell, Philip N. Edwards, Keith Oldham
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Patent number: 5254581Abstract: The invention concerns a cyclic ether derivative of the formula I ##STR1## wherein Ar.sup.1 is optionally substituted phenyl, naphthyl or a 9- or 10-membered bicyclic heterocyclic moiety;A.sup.1 is a direct link to X.sup.1 or (1-3C)alkylene;X.sup.1 is oxy, thio, sulphinyl, sulphonyl or imino;Ar.sup.2 is optionally substituted phenylene or pyridylene;R.sup.1 includes hydrogen, (1-4C)alkyl, (1-4C)alkcxycarbonyl and (1-4C)alkylthio; andR.sup.2 and R.sup.3 together form a group of the formula --A.sup.2 --X.sup.2 --A.sup.3 -- which, together with the carbon atom to which A.sup.2 and A.sup.3 are attached, defines a ring having 5 to 7 ring atoms, wherein each of A.sup.2 and A.sup.3 is (1-3C)alkylene and X.sup.2 is oxy, thio, sulphinyl or sulphonyl;or a pharmaceutically-acceptable salt thereof.The compounds of the invention are inhibitors of the enzyme 5-lipoxygenase.Type: GrantFiled: February 2, 1993Date of Patent: October 19, 1993Assignees: Imperial Chemical Industries PLC, ICI PharmaInventors: Pierre A. R. Bruneau, Robert I. Dowell, David Waterson
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Patent number: 5225438Abstract: The invention concerns an aryl derivative of the formula I, ##STR1## wherein Ar.sup.1 is optionally substituted phenyl, naphthyl or a heterocyclic moiety, and X.sup.1 is oxy, thio, sulphinyl, sulphonyl, difluoromethylene, imino, (1-4C)alkylimino or optionally substituted (1-4C)alkylene, or X.sup.1 is a group of the formula--X.sup.4 --CR.sub.2 -- or --CR.sub.2 --X.sup.4 --whereinX.sup.4 is oxy, thio, sulphinyl, sulphonyl or carbonyl and each R is hydrogen, methyl or ethyl;each of Ar.sup.2 and Ar.sup.3 is optionally substituted phenylene;X.sup.2 is oxy, thio, sulphinyl or sulphonyl;R.sup.1 is (1-4C)alkyl; andR.sup.2 and R.sup.3 together form a group of the formula --A.sup.1 --X.sup.3 --A.sup.2 -- which together with the carbon atom to which A.sup.1 and A.sup.2 are attached define a ring having 5 to 7 ring atoms, wherein each of A.sup.1 and A.sup.2 is (1-3C)alkylene and X.sup.Type: GrantFiled: November 26, 1991Date of Patent: July 6, 1993Assignees: Imperial Chemical Industries PLC, I.C.I.-PharmaInventors: Robert I. Dowell, Philip N. Edwards, Keith Oldham
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Patent number: 4711887Abstract: Hydrazinopyridiazine derivatives of the formula: ##STR1## wherein A is alkylene, wherein either R.sup.1 is hydrogen and R.sup.2 is hydrogen, alkoxycarbonyl or aralkoxycarbonyl, or R.sup.1 and R.sup.2 together form alkylidene, aralkylidene, alkoxycarbonylalkylidene or aralkoxycarbonylalkylidene, wherein either R.sup.3 and R.sup.4, which may be the same or different, each is hydrogen, halogen, hydroxy, amino, nitro, trifluoromethyl, carbamoyl, cyano, alkyl, hydroxyalkyl, cycloalkyl, alkenyl, alkynyl, alkoxy, alkylthio, cycloalkoxy, alkenyloxy, alkynyloxy, alkanoyl, aryl, aryloxy or dialkylamino, or R.sup.3 and R.sup.4 together with the adjacent benzene ring form indanyl, 5,6,7,8-tetrahydronaphthyl, 5-oxo-5,6,7,8-tetrahydronaphthyl, indenyl, 5,8-dihydronaphthyl or naphthyl, wherein either R.sup.5 and R.sup.6, which may be the same or different, each is hydrogen or alkyl, or R.sup.5 and R.sup.6 together with the adjacent pyridazine ring form phthalazinyl, and wherein X is oxygen or --NHCO--, --NHCO--A.sup.Type: GrantFiled: March 28, 1983Date of Patent: December 8, 1987Assignee: Imperial Chemical Industries PLCInventors: Malcolm T. Briggs, Robert I. Dowell, Craig W. Thornber
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Patent number: 4683232Abstract: Novel heterocyclic compounds of the formula: ##STR1## wherein either X is --CR.sup.1 R.sup.2 -- and Y is oxygen, sulphur or --NR.sup.3 --, wherein R.sup.1, R.sup.2 and R.sup.3, which may be the same or different, each is hydrogen or alkyl of up to 4 carbon atoms; or X is oxygen, sulphur or --NH-- and Y is --CH.sub.2 --; wherein R.sup.4 and R.sup.5, which may be the same or different, each is hydrogen, cyano, nitro, amino or hydroxy, or alkylthio of up to 4 carbon atoms, or has various other meanings defined in claim 1, provided that R.sup.4 and R.sup.5 are not both hydrogen; or wherein R.sup.4 and R.sup.5 are joined together such that with the benzene ring A they form a benzheterocyclic ring as defined in claim 1; and therein the benzene ring A may optionally bear one or more further substituents; or a salt thereof where appropriate.Type: GrantFiled: May 1, 1986Date of Patent: July 28, 1987Assignee: Imperial Chemical Industries PLCInventors: David Brown, Robert I. Dowell, Rodney B. Hargreaves, Brian G. Main
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Patent number: 4587246Abstract: Novel heterocyclic compounds of the formula: ##STR1## wherein either X is --CR.sup.1 R.sup.2 -- and Y is oxygen, sulphur or --NR.sup.3 --, wherein R.sup.1, R.sup.2 and R.sup.3, which may be the same or different, each is hydrogen or alkyl of up to 4 carbon atoms; or X is oxygen, sulphur or --NH-- and Y is --CH.sub.2 --; wherein R.sup.4 and R.sup.5, which may be the same or different, each is hydrogen, cyano, nitro, amino or hydroxy, or alkylthio of up to 4 carbon atoms, or has various other meanings defined in claim 1, provided that R.sup.4 and R.sup.5 are not both hydrogen; or wherein R.sup.4 and R.sup.5 are joined together such that with the benzene ring A they form a benzheterocyclic ring as defined in claim 1; and therein the benzene ring A may optionally bear one or more further substituents; or a salt thereof where appropriate.Type: GrantFiled: November 28, 1984Date of Patent: May 6, 1986Assignee: Imperial Chemical Industries PLCInventors: David Brown, Robert I. Dowell, Rodney B. Hargreaves, Brian G. Main
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Patent number: 4503054Abstract: Novel heterocyclic compounds of the formula: ##STR1## wherein either X is --CR.sup.1 R.sup.2 -- and Y is oxygen, sulphur or --NR.sup.3 --, wherein R.sup.1, R.sup.2 and R.sup.3, which may be the same or different, each is hydrogen or alkyl of up to 4 carbon atoms; or X is oxygen, sulphur or --NH-- and Y is --CH.sub.2 --; wherein R.sup.4 and R.sup.5, which may be the same or different, each is hydrogen, cyano, nitro, amino or hydroxy, or alkylthio of up to 4 carbon atoms, or has various other meanings defined in claim 1, provided that R.sup.4 and R.sup.5 are not both hydrogen; or wherein R.sup.4 and R.sup.5 are joined together such that with the benzene ring A they form a benzheterocyclic ring as defined in claim 1; and therein the benzene ring A may optionally bear one or more further substituents; or a salt thereof where appropriate.Type: GrantFiled: August 31, 1983Date of Patent: March 5, 1985Assignee: Imperial Chemical Industries PLCInventors: David Brown, Robert I. Dowell, Rodney B. Hargreaves, Brian G. Main
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Patent number: 4423045Abstract: Novel heterocyclic compounds of the formula: ##STR1## wherein either X is --CR.sup.1 R.sup.2 -- and Y is oxygen, sulphur or --NR.sup.3, wherein R.sup.1, R.sup.2 and R.sup.3, which may be the same or different, each is hydrogen or alkyl of up to 4 carbon atoms; or X is oxygen, sulphur or --NH-- and Y is --CH.sub.2 --; wherein R.sup.4 and R.sup.5, which may be the same or different, each is hydrogen, cyano, nitro, amino or hydroxy, or alkylthio of up to 4 carbon atoms, or has various other meanings defined in claim 1, provided that R.sup.4 and R.sup.5 are not both hydrogen; or wherein R.sup.4 and R.sup.5 are joined together such that with the benzene ring A they form a benzheterocyclic ring as defined in claim 1; and therein the benzene ring A may optionally bear one or more further substituents; or a salt thereof where appropriate.These compounds possess cardiotonic properties, and some of them possess peripheral vasodilator properties, and they are useful for the treatment of acute or chronic heart failure.Type: GrantFiled: November 16, 1981Date of Patent: December 27, 1983Assignee: Imperial Chemical Industries PLCInventors: David Brown, Robert I. Dowell, Rodney B. Hargreaves, Brian G. Main