WO2007020046A1 - Benzoquinazoline derivatives and their use in treating bone disorders - Google Patents

Benzoquinazoline derivatives and their use in treating bone disorders Download PDF

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Publication number
WO2007020046A1
WO2007020046A1 PCT/EP2006/008036 EP2006008036W WO2007020046A1 WO 2007020046 A1 WO2007020046 A1 WO 2007020046A1 EP 2006008036 W EP2006008036 W EP 2006008036W WO 2007020046 A1 WO2007020046 A1 WO 2007020046A1
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Prior art keywords
phenyl
lsopropyl
ynyloxy
prop
quinazoline
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PCT/EP2006/008036
Other languages
French (fr)
Inventor
Sandra Ammon
René Beerli
Leo Widler
Original Assignee
Novartis Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to NZ565605A priority Critical patent/NZ565605A/en
Priority to MX2008002163A priority patent/MX2008002163A/en
Application filed by Novartis Ag filed Critical Novartis Ag
Priority to AU2006281627A priority patent/AU2006281627B2/en
Priority to AT06776845T priority patent/ATE448206T1/en
Priority to US12/063,526 priority patent/US20100166765A1/en
Priority to JP2008526424A priority patent/JP2009505984A/en
Priority to DE602006010401T priority patent/DE602006010401D1/en
Priority to EP06776845A priority patent/EP1917246B1/en
Priority to PL06776845T priority patent/PL1917246T3/en
Priority to CA002619249A priority patent/CA2619249A1/en
Priority to BRPI0614544-2A priority patent/BRPI0614544A2/en
Priority to DK06776845.7T priority patent/DK1917246T3/en
Publication of WO2007020046A1 publication Critical patent/WO2007020046A1/en
Priority to IL188922A priority patent/IL188922A0/en
Priority to TNP2008000070A priority patent/TNSN08070A1/en
Priority to NO20081315A priority patent/NO20081315L/en
Priority to HK08108070.8A priority patent/HK1117154A1/en
Priority to HR20100072T priority patent/HRP20100072T1/en

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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D409/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms
    • C07D409/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms containing two hetero rings
    • C07D409/06—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms containing two hetero rings linked by a carbon chain containing only aliphatic carbon atoms
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D265/00—Heterocyclic compounds containing six-membered rings having one nitrogen atom and one oxygen atom as the only ring hetero atoms
    • C07D265/04—1,3-Oxazines; Hydrogenated 1,3-oxazines
    • C07D265/12—1,3-Oxazines; Hydrogenated 1,3-oxazines condensed with carbocyclic rings or ring systems
    • C07D265/14—1,3-Oxazines; Hydrogenated 1,3-oxazines condensed with carbocyclic rings or ring systems condensed with one six-membered ring
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P19/00—Drugs for skeletal disorders
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P19/00—Drugs for skeletal disorders
    • A61P19/08—Drugs for skeletal disorders for bone diseases, e.g. rachitism, Paget's disease
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P19/00—Drugs for skeletal disorders
    • A61P19/08—Drugs for skeletal disorders for bone diseases, e.g. rachitism, Paget's disease
    • A61P19/10—Drugs for skeletal disorders for bone diseases, e.g. rachitism, Paget's disease for osteoporosis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P5/00—Drugs for disorders of the endocrine system
    • A61P5/18—Drugs for disorders of the endocrine system of the parathyroid hormones
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D217/00—Heterocyclic compounds containing isoquinoline or hydrogenated isoquinoline ring systems
    • C07D217/12—Heterocyclic compounds containing isoquinoline or hydrogenated isoquinoline ring systems with radicals, substituted by hetero atoms, attached to carbon atoms of the nitrogen-containing ring
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D217/00—Heterocyclic compounds containing isoquinoline or hydrogenated isoquinoline ring systems
    • C07D217/22—Heterocyclic compounds containing isoquinoline or hydrogenated isoquinoline ring systems with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to carbon atoms of the nitrogen-containing ring
    • C07D217/26—Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D239/00—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings
    • C07D239/70—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings condensed with carbocyclic rings or ring systems
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D239/00—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings
    • C07D239/70—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings condensed with carbocyclic rings or ring systems
    • C07D239/72—Quinazolines; Hydrogenated quinazolines
    • C07D239/74—Quinazolines; Hydrogenated quinazolines with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, attached to ring carbon atoms of the hetero ring
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D401/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom
    • C07D401/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings
    • C07D401/06—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings linked by a carbon chain containing only aliphatic carbon atoms
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D401/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom
    • C07D401/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings
    • C07D401/12—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings linked by a chain containing hetero atoms as chain links
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D403/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00
    • C07D403/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00 containing two hetero rings
    • C07D403/06—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00 containing two hetero rings linked by a carbon chain containing only aliphatic carbon atoms
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D403/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00
    • C07D403/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00 containing two hetero rings
    • C07D403/12—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00 containing two hetero rings linked by a chain containing hetero atoms as chain links
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D405/00—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom
    • C07D405/02—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings
    • C07D405/06—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings linked by a carbon chain containing only aliphatic carbon atoms
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D405/00—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom
    • C07D405/02—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings
    • C07D405/12—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings linked by a chain containing hetero atoms as chain links
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D409/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms
    • C07D409/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms containing two hetero rings
    • C07D409/12—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms containing two hetero rings linked by a chain containing hetero atoms as chain links
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D417/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00
    • C07D417/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings
    • C07D417/06—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings linked by a carbon chain containing only aliphatic carbon atoms
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D417/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00
    • C07D417/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings
    • C07D417/12—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings linked by a chain containing hetero atoms as chain links

Definitions

  • the present invention relates to bicyclic compounds, in particular to 2-benzoquinazoline derivatives and to pharmaceutical uses thereof.
  • the invention provides a compound of formula (I) or a pharmaceutically acceptable salt or prodrug ester thereof:
  • Q is CH or N
  • R2 is C 1 -C 4 alkyl
  • Y is selected from the group consisting of: R5-O-, C 1 -C 4 alkyl, C 1 -C 4 alkenyl, C 1 -C 4 alkynyl, R5-NH-;
  • R5 is C 1 -C 4 alkyl, C 1 -C 4 alkenyl, C 1 -C 4 alkynyl;
  • X is selected from the group consisting of aryl, heteroaryl, C 1 -C 10 alky!, Ci-C 10 alkyloxy, cycloalkyl, heterocycloalkyl, aryl C 1 -C 4 alkyl, heteroaryl C 1 -C 4 alkyl, cycloalkyl C 1 -C 4 alkyl, heterocycloalkyl C 1 -C 4 alkyl, arylamino, heteroarylamino, aryl C 1 -C 4 alkylamino, heteroaryl Ci-C 4 alkylamino, C 1 -C 6 alkylamino, C 1 -C 6 dialkylamino, aryloxy, heteroaryloxy, aryl C 1 -C 4 alkyloxy, heteroaryl Ci-C 4 alkyloxy, cycloalkyl Ci-C 4 alkylamino, heterocycloalkyl Ci-C 4 alkylamino, cycloalkyl Ci-C 4 alkyla
  • the optional substituent or substituents on X being independently selected from the group consisting of halo, cyano, trifluoromethyl, nitro, hydroxy, optionally substituted (CrC 4 alkyl, C 1 -C 4 alkyloxy, amino, sulfanyl, sulfonyl, amino, oxycarbonyl, hydroxyl, sulfinyl, aminosulfonyl, sulfonylamino, carbonyl, carbonyloxy, carbonyl amino, carboxyl, acyl, acylamino, or carbamoyl); the optional substituent or substituents being selected from C 1 -C 6 alkyl, C 1 -C 6 alkyloxy, carboxyl, hydroxyl, hydroxy C 1 -C 4 alkyl; each of which in turn may be optionally substituted by C 1 -C 6 alkyloxy, C 1 -C 6 alkyl, C 1 -C 3 fluorinated alkyl, C
  • R3 and R4 each represent one or more substituents independently selected from: H, halo, C 1 -C 4 alkyl, C 1 -C 4 alkyloxy, CF 3 ;
  • R3 or R4 being independently selected from the group consisting of C 1 -C 4 alkyl, halo, C 1 -C 4 alkyloxy, cyano, sulfanyl, sulfonyl, amino, oxycarbonyl, hydroxyl which may in turn be optionally substituted once or more by C 1 -C 4 alkyl, halo, C 1 -C 4 alkyloxy, cyano, sulfanyl, sulfonyl, amino, oxycarbonyl or hydroxyl.
  • the present invention provides a compound of formula (I 1 ) or a pharmaceutically acceptable salt or prodrug ester thereof:
  • R2 is C 1 -C 4 alkyl
  • Y is selected from the group consisting of: R5-O-, C 1 -C 4 alkyl, C 1 -C 4 alkenyl, C 1 -C 4 alkynyl, R5-NH-;
  • R5 is selected from C 1 -C 4 alkyl, C 1 -C 4 alkenyl, C 1 -C 4 alkynyl;
  • X is selected from the group consisting of aryl, heteroaryl, C 1 -C 6 alkyl, cycloalkyl, heterocycloalkyl, aryl C 1 -C 4 alkyl, heteroaryl C 1 -C 4 alkyl, arylamino, aryl C 1 -C 4 alkylamino, heteroaryl C 1 -C 4 alkylamino, C 1 -Ce alkylamino, C 1 -C 6 dialkylamino amino, aryloxy, heteroaryloxy, aryl C 1 -C 4 alkyloxy, or heteroaryl C 1 -C 4 alkyloxy, each of which is optionally substituted once or more;
  • the optional substituent or substituents on X being independently selected from the group consisting of Ci-C 4 alkyl, halo, C 1 -C 4 alkyloxy, cyano, trifluoromethyl, hydroxy, amino, nitro, alkyl, lower alkyl substituted (sulfanyl, sulfonyl, amino, oxycarbonyl, hydroxyl, sulfinyl, carbonyl, carboxyl, carbamoyl or aminoacyl);
  • R3 and R4 each represent one or more substituents independently selected from: H, halo, optionally substituted C 1 -C 4 alkyl, optionally substituted Ci-C 4 alkyloxy;
  • R3 or R4 being independently selected from the group consisting of C 1 -C 4 alkyl, halo, Ci-C 4 alkyloxy, cyano, sulfanyl, sulfonyl, amino, oxycarbonyl, hydroxyl.
  • Q is preferably N.
  • R2 is preferably isopropyl, cyclopropyl or t-butyl. More preferably, R2 is isopropyl. Alternatively, R2 is preferably cyclopropyl.
  • R3 and R4 are preferably halo or H. More preferably, R3 and R4 are H. Y is preferably R5-O-. More preferably, R5 is propargyl.
  • X is optionally substituted (aryl, heteroaryl, arylamino, heteroarylamino, aryl C 1 -C 4 alkylamino, heteroaryl Ci-C 4 alkylamino, aryloxy, heteroaryloxy, C 1 -C 6 alkyloxy, aryl C 1 -C 4 alkyloxy or heteroaryl Ci-C 4 alkyloxy).
  • X is optionally substituted (aryl, heteroaryl, arylamino, heteroarylamino, aryl C 1 -C 4 alkylamino, heteroaryl C 1 -C 4 alkylamino, aryloxy, C 1 -C 6 alkyloxy or aryl C 1 -C 4 alkyloxy).
  • X is optionally substituted (aryl, heteroaryl or heterocycloalkyl).
  • X is optionally substituted aryl, preferably phenyl or naphthalenyl. More preferably, X is optionally substituted phenyl.
  • X is optionally substituted heteroaryl.
  • Preferred heteroaryl groups are furanyl, thienyl, pyrrolyl, thiazolyl, benzothiazolyl, pyridinyl and benz[b]thiophen-2- yl.
  • X is arylamino or heteroarylamino.
  • Preferred arylamino and heteroarylamino groups are pyridinylamino, pyrazolylamino, thioazolylamino, naphthalenylamino, quinolinaylamino, isoquinolinaylamino, phthalazinylamino, benzoimidazolylamino and benzothiazolylamino.
  • X is aryloxy, C 1 -C 6 alkyloxy or aryl C 1 -C 4 alkyloxy.
  • X is optionally substituted heterocycloalkyl.
  • a preferred heterocycloalkyl substituent is piperidinyl.
  • X is preferably optionally substituted (aryl, heteroaryl, cycloalkyl or heterocycloalkyl). More preferably, X is optionally substituted phenyl. Yet more preferably, X is a phenyl group substituted in the ortho- or para- position. Alternatively preferably, X is a heteroaryl which is optionally substituted. Alternatively preferably, X is optionally substituted arylamino. More preferably, X is substituted arylamino containing substituent at the meta position.
  • a third aspect of the invention provides a compound having the formula (II) or a pharmaceutically acceptable salt or prodrug ester thereof:
  • X' is selected from the group consisting of aryl, heteroaryl, cycloalkyl, heterocycloalkyl, -C 1 - C 4 alkylaryl, -d-C 4 alkylheteroaryl, arylamino, heteroarylamino, aryl Ci-C 4 alkylamino, heteroaryl C 1 -C 4 alkylamino, aryloxy, heteroaryloxy, aryl Ci-C 4 alkyloxy, heteroaryl C 1 -C 4 alkyloxy, aryl CrC 4 alkyl, heteroaryl Ci-C 4 alkyl, Ci-C 6 alkyl, -C 1 -C 4 alkylamino or amino, each of which is optionally substituted once or more;
  • the optional substituent or substituents on X' being independently selected from the group consisting of halo, cyano, trifluoromethyl, nitro, hydroxy, optionally substituted (Ci-C 4 alkyl, Ci-C 4 alkyloxy, amino, sulfanyl, sulfonyl, amino, oxycarbonyl, hydroxyl, sulfinyl, carbonyl, carboxyl, acyl, acylamino, carbamoyl or aminoacyl); the optional substituent or substituents being selected from CrC 6 alkyl, C 1 -C 6 alkyloxy, carboxyl, hydroxyl, hydroxy C 1 -C 4 alkyl; each of which in turn may be optionally substituted by C 1 -C 6 alkyloxy, C 1 -C 6 alkyl, C 1 -C 6 alkyloxy, carboxyl, hydroxyl, hydroxy C 1 -C 4 alkyl, halo, cyano, nitro.
  • R 2 ' is C 1 -C 4 alkyl.
  • a fourth aspect of the invention provides a compound of formula (II) or a pharmaceutically acceptable sait or prodrug ester thereof: on wherein:
  • X' is selected from the group consisting of aryl, heteroaryl, cycloalkyl, heterocycloalkyl, aryl C 1 -C 4 alkyl, heteroaryl C 1 -C 4 alkyl, aryl C 1 -C 4 alkylamino or heteroaryl C 1 -C 4 alkylamino, each of which is optionally substituted once or more; the optional substituent or substituents on X' being independently selected from the group consisting of C 1 -C 4 alkyl, halo, C 1 -C 4 alkyloxy, cyano, trifluoromethyl, hydroxy, amino, nitro, alkyl, lower alkyl substituted (sulfanyl, sulfonyl, amino, oxycarbonyl, hydroxyl, sulfinyl, carbonyl, carboxyl, carbamoyl or aminoacyl);
  • R 2 ' is C 1 -C 4 alkyl.
  • R 2 " is isopropyl, t-butyl or cyclopropyl. More preferably, R 2 ' is isopropyl. Alternatively, R 2 ' is preferably cyclopropyl.
  • X' is optionally substituted (aryl, heteroaryl, arylamino, heteroarylamino, aryl C 1 -C 4 alkylamino, heteroaryl C 1 -C 4 alkylamino, aryloxy, heteroaryloxy, C 1 -C 6 alkyloxy, aryl C 1 -C 4 alkyloxy or heteroaryl C 1 -C 4 alkyloxy).
  • X' is optionally substituted (aryl, heteroaryl, arylamino, heteroarylamino, aryl C 1 -C 4 alkylamino, heteroaryl C 1 -C 4 alkylamino, aryloxy, Ci-C e alkyloxy or aryi C 1 -C 4 alkyloxy).
  • X' is optionally substituted (aryl, heteroaryl or heterocycloalkyl).
  • X 1 is optionally substituted aryl, preferably phenyl or naphthalenyl. More preferably, X' is optionally substituted phenyl.
  • X' is optionally substituted heteroaryl.
  • Preferred heteroaryl groups are furanyl, thienyl, pyrrolyl, thiazolyl, benzothiazolyl, pyridinyl and benz[b]thiophen-2- yl.
  • X' is arylamino or heteroarylamino.
  • Preferred heteroarylamino groups are pyridinylamino, pyrazolylamino, thioazolylamino, naphthalenylamino, quinolinaylamino, isoquinolinaylamino, phthalazinylamino, benzoimidazolylamino and benzothiazolylamino.
  • X 1 is aryloxy, Ci-C 6 alkyloxy or aryl C 1 -C 4 alkyloxy.
  • X' is optionally substituted heterocycloalkyl.
  • lower when referring to organic radicals or compounds means a compound or radical with may be branched or unbranched with up to and including 7 carbon atoms.
  • a lower alkyl group may be branched, unbranched or cyclic and contains 1 to 7 carbon atoms, preferably 1 to 4 carbon atoms.
  • Lower alkyl represents, for example: methyl, ethyl, propyl, butyl, isopropyl, isobutyl, tertiary butyl or 2,2-dimethylpropyl.
  • a lower alkoxy group may be branched or unbranched and contains 1 to 7 carbon atoms, preferably 1 to 6 carbon atoms.
  • Lower alkoxy represents, for example: methoxy, ethoxy, propoxy, butoxy, isopropoxy, isobutoxy or tertiary butoxy.
  • Lower alkoxy includes cycloalkyloxy and cycloalkyl - lower alkyloxy.
  • a lower alkene, alkenyl or alkenoxy group is branched or unbranched and contains 2 to 7 carbon atoms, preferably 1 to 4 carbon atoms and contains at least one carbon-carbon double bond.
  • Lower alkene, lower alkenyl or lower alkenyloxy represents for example vinyl, prop-1-enyl, allyl, butenyl, isopropenyl or isobutenyl and the oxy equivalents thereof.
  • a lower akyne or alkynyl group is branched or unbranched and contains 2 to 7 carbon atoms, preferably 1 to 4 carbon atoms and contains at least one carbon-carbon triple bond.
  • Lower alkyne or lower alkynyl or lower alkenyloxy represents for example ethynyl or propynyl.
  • oxygen containing substituents e.g. alkoxy, alkenyloxy, alkynyloxy, carbonyl, etc. encompass their sulphur containing homologues, e.g. thioalkyl, alkyl-thioalkyl, thioalkenyl, alkenyl-thioalkyl, thioalkynyl, thiocarbonyl, sulphone, sulphoxide etc.
  • HaIo or halogen represents chloro, fluoro, bromo or iodo.
  • Aryl represents carbocyclic aryl or biaryl.
  • Carbocyclic aryl is an aromatic cyclic hydrocarbon containing from 6 to 18 ring atoms. It can be monocyclic, bicyclic or tricyclic, for example naphthyl, phenyl, or phenyl mono-, di- or trisubstituted by one, two or three substituents.
  • Heterocyclic aryl or heteroaryl is an aromatic monocyclic or bicyclic hydrocarbon containing from 5 to 18 ring atoms one or more of which are heteroatoms selected from O, N or S. Preferably there are one or two heteroatoms.
  • Heterocyclic aryl represents, for example: pyridyl, indolyl, quinoxalinyl, quinolinyl, isoquinolinyl, benzothienyl, benzofuranyl, benzopyranyl, benzothiopyranyl, furanyl, pyrrolyl, thiazolyl, oxazolyl, isoxazolyl, triazolyl, tetrazolyl, pyrazolyl, imidazolyl, thienyl, oxadiazolyl, benzimidazolyl. Heterocyclic aryl also includes such substituted radicals.
  • Cycloalkyl represents a cyclic hydrocarbon containing from 3 to 12 ring atoms preferably from 3 to 6 ring atoms. Cycloalkyl represents, for example: cyclopropyl, cyclobutyl, cyclopentyl, or cyclohexyl. The cycloalkyl may optionally be substituted.
  • Heterocycloalkyl represents a mono-, di- or tricyclic hydrocarbon which may be saturated or unsaturated and which contains one or more, preferably one to three heteroatoms selected from O, N or S. Preferably it contains between three and 18 ring atoms, more preferably between 3 and 8 ring atoms.
  • the term heterocycloalkyl is intended also to include bridged heterocycloalkyl groups such as 3-hyroxy-8-aza-bicyclo[3.2.1]oct-8-yl.
  • Pharmaceutically acceptable salts include acid addition salts with conventional acids, for example mineral acids, e.g. hydrochloric acid, sulfuric or phosphoric acid, or organic acids, for example aliphatic or aromatic carboxylic or sulfonic acids, e.g.
  • pharmaceutically acceptable salts also represent metal or ammonium salts, such as alkali metal or alkaline earth metal salts, e.g. sodium, potassium, magnesium or calcium salts, as well as ammonium salts, which are formed with ammonia or suitable organic amines.
  • the agents of the invention which comprise free hydroxyl groups may also exist in the form of pharmaceutically acceptable, physiologically cleavable esters, and as such are included within the scope of the invention.
  • Such pharmaceutically acceptable esters are preferably prodrug ester derivatives, such being convertible by solvolysis or cleavage under physiological conditions to the corresponding agents of the invention which comprise free hydroxyl groups.
  • Suitable pharmaceutically acceptable prodrug esters are those derived from a carboxylic acid, a carbonic acid monoester or a carbamic acid, advantageously esters derived from an optionally substituted lower alkanoic acid or an arylcarboxylic acid.
  • Preferred compounds of formula (I) are:
  • a pharmaceutical composition comprising a compound of formula (I) in association with a pharmaceutically acceptable excipient, diluent or carrier.
  • a compound of formula (I) for promoting the release of parathyroid hormone is provided.
  • PTH parathyroid hormone
  • analogues and fragments thereof can have a pronounced anabolic effect on bone formation.
  • compounds which promote PTH release such as the compounds of the present invention may be used for preventing or treating conditions of bone which are associated with increased calcium depletion or resorption or in which stimulation of bone formation and calcium fixation in the bone is desirable.
  • the invention includes a method for preventing or treating bone conditions which are associated with increased calcium depletion or resorption or in which stimulation of bone formation and calcium fixation in the bone is desirable in which an effective amount of a compound of formula (I) as defined above, or a pharmaceutically- acceptable and -cleavable ester, or acid addition salt thereof is administered to a patient in need of such treatment.
  • the invention provides a process for preparation of a compound of formula (I) in free or salt form, comprising the step of:
  • a preferred ammonium salt is ammonium acetate.
  • the solvent contains water. Suitable solvents are ethanol/water.
  • an oxidizing agent e.g. DDQ is also preferred.
  • the compound of formula III may be prepared by any suitable route, for example, when Y is propargyloxy and R2 is isopropyl, as follows:
  • LG represents a suitable leaving group, for example a Weinreb amide (N-methoxy- N-methylamide)
  • Met is Li, a Grignard reagent (-MgBr) or other suitable organometallic under suitable anhydrous conditions; or
  • Vl under suitable anhydrous conditions followed by oxidation to the carbonyl compound by an appropriate oxidation agent
  • Hal is halogen or a leaving group
  • the compound of formula V can be prepared by any suitable route, for example as follows: Et
  • the compounds of formula I in free form may be converted into salt forms in conventional manner and vice-versa.
  • the compounds of the invention can be recovered from the reaction mixture and purified in conventional manner.
  • Isomers such as enantiomers, may be obtained in conventional manner, e.g. by fractional crystallization or asymmetric synthesis from corresponding asymmetrically substituted, e.g. optically active starting materials.
  • the invention includes the use of a compound of formula (I) in the manufacture of a medicament for preventing or treating bone conditions which are associated with increased calcium depletion or resorption or in which stimulation of bone formation and calcium fixation in the bone is desirable.
  • the invention provides a combination comprising a therapeutically effective amount of a compound as described above and a second drug substance selected from: calcium, a calcitonin or an analogue or derivative thereof, a steroid hormone, a partial estrogen agonist or estrogen-gestagen combination, a SERM (Selective Estrogen Receptor Modulator), vitamin D or an analogue thereof or PTH, a PTH fragment or a PTH derivative for simultaneous, separate or sequential treatment.
  • a second drug substance selected from: calcium, a calcitonin or an analogue or derivative thereof, a steroid hormone, a partial estrogen agonist or estrogen-gestagen combination, a SERM (Selective Estrogen Receptor Modulator), vitamin D or an analogue thereof or PTH, a PTH fragment or a PTH derivative for simultaneous, separate or sequential treatment.
  • Agents of the invention may be prepared by processes described below, which are intended to be non-limiting examples:
  • the analytical HPLC conditions are as follows:
  • A water containing 5% acetonitirile and 0.1 % TFA;
  • the starting material 2-methoxyphenylglyoxal hydrate is commercially available.
  • the starting material 4-methoxyphenylglyoxal hydrate is prepared according to the literature, for example by SeO 2 oxidation of (4-methoxy-phenyl)-ethanone.
  • the starting material (3-fluoro-phenyl)-oxo-acetaldehyde is prepared according to the literature, for example by SeO 2 oxidation of 1-(3-fluoro-phenyl)-ethanone, analogously to Example 1.
  • the starting material (3-chloro-phenyl)-oxo-acetaldehyde is prepared according to the literature, for example by SeO 2 oxidation of (3-chloro-phenyl)-ethanone, analogously to Example 1.
  • the starting material (4-fluoro-phenyl)-oxo-acetaldehyde is prepared according to the literature, for example by SeO 2 oxidation of (4-fluoro-phenyl)-ethanone, analogously to Example 1.
  • the starting material (3-fluoro-phenyl)-oxo-acetaldehyde is prepared according to the literature, for example by SeO 2 oxidation of (3-fluoro-phenyl)-ethanone, analogously to Example 1.
  • the starting material (4-bromo-phenyl)-oxo-acetaldehyde is prepared according to the literature, for example by SeO 2 oxidation of (4-bromo-phenyl)-ethanone, analogously to Example 1.
  • the starting material (4-methyl-phenyl)-oxo-acetaldehyde is prepared according to the literature, for example by SeO 2 oxidation of (4-methyl-phenyl)-ethanone, analogously to Example 1.
  • the starting material (4-isopropyl-phenyl)-oxo-acetaldehyde is prepared according to the literature, for example by SeO 2 oxidation of (4-isopropyl-phenyl)-ethanone, analogously to Example 1.
  • the starting material (4-ethyl-phenyl)-oxo-acetaldehyde is prepared according to the literature, for example by SeO 2 oxidation of (4-ethyl-phenyl)-ethanone, analogously to Example 1.
  • Example i 6a (4-Propyi-phenyi)-[4-(4-isopropyi-phenyl)-6-propargyloxy-quinazolin-2-yl]- methanone
  • the starting material (4-n-propyl-phenyl)-oxo-acetaldehyde is prepared according to the literature, for example by SeO 2 oxidation of (4-n-propyl-phenyl)-ethanone, analogously to Example 1.
  • glyoxal starting material is prepared according to the literature, for example by SeO 2 oxidation of 4-(2-oxo-acetyl)-benzoic acid methyl ester, analogously to Example 1.
  • the appropriate glyoxal starting material is prepared according to the literature, for example by SeO 2 oxidation of the corresponding ketone, analogously to Example 1.
  • Example 25 4-[4-(4-lsopropyl-phenyl)-6-propargyloxy-quinazoline-2-carbonyl]-benzoic acid ethyl ester
  • step A The crude product (1.0 g; 5.10 mmol) obtained in step A is dissolved in 30 ml dichloromethane and treated at room temperature with 2.38 g (5.61 mmol) Dess-Martin periodinane. The oxidation is complete after 4 hours. The white suspension is concentrated i.V. and the prduct purified by chromatography (hexane/ethyl acetate).
  • Example 40 4-(4-lsopropyl-phenyl)-6-propargyloxy-quinazoline-2-carboxylic acid ethyl ester
  • step B the aldehyde obtained in step B is added (120 mg in 2 ml THF). The cooling bath is removed and the mixture is warmed to rt. Extraction with dichloromethane / water affords a yellow oil which is purified by chromatography (dichloromethane / methanol).
  • A) 4-(4-lsopropyl-phenyl)-6-propargyloxy-quinazoline-2-carboxylic acid A solution of 1.7 g (4.5 mmol) 4-(4-isopropyl-phenyl)-6-propargyloxy-quinazoline-2-carboxylic acid ethyl ester in 50 ml ethanol is treated at RT with 15 ml aqueous 1 M NaOH. After 1.5 h the reaction mixture is acidified with 1 M hydrochloric acid and extracted with CH 2 CI 2 . The organic layers are dried over MgSO 4 and evaporated. The free acid is obtained after chromatography (hexane / ethyl acetate).
  • Example 47 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-chloro- phenyl)-amide
  • Example 48 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3- methoxy-phenyl)-amide
  • Example 50 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-3,4-dihydro-quinazoline-2-carboxylic acid (3-methanesulfonyl-phenyl)-amide
  • Example 52 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-3,4-dihydro-quinazoline-2-carboxylic acid (3-sulfamoyl-phenyl)-amide
  • Example 53 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-3,4-dihydro-quinazoline-2-carboxylic acid [3-(2-hydroxy-ethanesulfonyl)-phenyl]-amide
  • Example 54 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-3,4-dihydro-quinazoline-2-carboxylic acid (5-ethanesulfonyl-2-hydroxy-phenyl)-amide
  • Example 55 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-nitro- phenyl)-amide
  • Example 56 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-cyano- phenyl)-amide
  • Example 58 3- ⁇ [4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino ⁇ - benzoic acid ethyl ester
  • Example 61 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3- carbamoyl-phenyl)-amide
  • Example 62 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-acetyl- phenyl)-amide
  • Example 64 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3- methylcarbamoyl-phenyl)-amide
  • Example 66 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3- dimethylcarbamoyl-5-trifluoromethyl-phenyl)-amide
  • Example 68 3- ⁇ [4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino ⁇ -5- trifluoromethyl-benzoic acid isopropyl ester
  • Example 74 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-cyano- 5-fluoro-phenyl)-amide
  • Example 75 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3,4- dicyano-phenyl)-amide
  • Example 76 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (4-cyano- 3-trifluoromethyl-phenyl)-amide
  • Example 77 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3- trifluoromethyl-phenyl)-amide
  • Example 78 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (4- acetylamino-3-trifluoromethyl-phenyl)-amide
  • Example 79 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3- methoxy-5-trifluoromethyl-phenyl)-amide
  • Example 81 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-fluoro- 5-trifluoromethyl-phenyl)-amide
  • Example 82 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (4-fluoro- 3-trifluoromethyl-phenyl)-amide
  • Example 84 3- ⁇ [4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino ⁇ -4- methyl-benzoic acid methyl ester
  • Example 87 4- ⁇ [4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino ⁇ - phthalic acid dimethyl ester
  • Example 88 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3,5- dichloro-phenyl)-amide
  • Example 91 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (4-chloro- 3-trifluoromethyl-phenyl )-amide
  • the intermediate (2,5-dihydro-pyrrol-i -yl)-[4-(4-isopropyl-phenyl)-6-prop-2-ynyloxy- quinazolin-2-yl]-methanone is prepared from 4-(4-isopropyl-phenyl)-6-propargyloxy- quinazoline-2-carboxylic acid and commercially available 3-pyrroline using the method described in example 46.
  • a solution of 200 mg (0.50 mmol) of this intermediate and 150 mg (0.65 mmol) DDQ (2,3-dichloro-5,6-dicyano-p-benzoquinone) in 1 ml ethyl acetate is stirred for 18 h at RT. Water is added and the reaction mixture is extracted with ethyl acetate. The solvent is evaporated and the product is purified by flash chromatography using a ethyl acetate / hexane gradient.
  • Example 96 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (5- methyl-1 H-pyrazol-3-yl)-amide
  • Example 98 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid naphthalen-1 -ylamide
  • Example 100 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid phthalazin-5-ylamide
  • Example 102 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid quinolin- 8-ylamide
  • Example 104 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (5- acetyl-quinolin-8-yl)-amide
  • Example 106 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid quinolin- 2-ylamide
  • Example 108 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (2- methyl-quinolin-6-yl)-amide
  • Example 109 (6- ⁇ [4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino ⁇ - quinolin-8-yloxy)-acetic acid ethyl ester
  • Example 110 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (1H- benzoimidazol-4-yl)-amide
  • Example 111 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid benzothiazol-2-ylamide
  • Example 112 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (benzo[1 ,3]dioxol-5-ylmethyl)-amide
  • Example 113 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (thiophen-2-ylmethyl)-amide
  • Example 114 4-(4-lsopropyl-pheny1)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid 3- methoxy-phenyl ester
  • Example 115 1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid ethyl ester
  • the diacid from above (50 g, 230 mmol) is heated under reflux in 350 ml acetic anhydride for
  • a Grignard reagent is prepared in 400 ml THF from 66 g (330 mmol) 4-bromo- isopropylbenzene and 8.1 g Magnesium. Unreacted metallic magnesium is filtered off and the reagent solution is added dropwise at RT to a solution of 55.97 g (280 mmol) 5-prop-2- ynyloxy-isobenzofuran-1 ,3-dione in 400 ml THF. Cooling is applied to compensate for the exothermic reaction. Fifteen minutes after the end of the addition 500 ml saturated ammonium chloride solution are poured to the reaction mixture and THF is evaporated. The product is extracted with dichloromethane and purified by Flash chromatography using a ethyl acetate / hexane gradient.
  • Example 116 1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid 1 ,2- dimethyl-propyl ester
  • Example 118 1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid cyclopropylmethyl ester
  • Example 120 1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid 2- methoxy-benzyl ester
  • Example 121 1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid 3- methoxy-benzyl ester
  • Example 123 1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid phenethyl ester
  • Example 125 1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid [3-(2- hydroxy-ethanesulfonyl)-phenyl]-amide
  • Example 126 [1 -(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinolin-3-yl]-(3-methoxy-phenyl)- methanone
  • Example 127 [1 -(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinolin-3-yl]-(4-methoxy-phenyl)- methanone
  • Agents of the Invention as defined above, e.g., of formula (I), particularly as exemplified, in free or pharmaceutically acceptable acid addition salt form, exhibit pharmacological activity and are useful as pharmaceuticals, e.g. for therapy, in the treatment of diseases and conditions as hereinafter set forth.
  • a method to determine antagonism at the PcaR consists in measuring the inhibition of intracellular calcium transients stimulated by extracellular calcium.
  • CCL39 fibroblasts stably transfected with human PcaR are seeded at 40'0OO cells /well into 96-well Viewplates and incubated for 24 hours. Medium is then removed and replaced with fresh medium containing 2 ⁇ M Fluo-3 AM (Molecular Probes, Leiden, The Netherlands), In routine experiments, cells are incubated at 37°C, 5 % CO 2 for 1 h. Afterwards, plates are washed twice with mHBS and wells are refilled with 100 ⁇ l mHBS containing the test compounds. Incubation is continued at room temperature for 15 minutes. To record changes of intracellular free calcium, plates are transferred to fluorescence-imaging plate reader (Molecular Devices, Sunnyvale, CA, USA). A baseline consisting in 5 measurements of 0.4 seconds each (laser excitation 488 nm) is recorded. Cells are then stimulated with calcium (2.5 mM final), and fluorescence changes recorded over a period of 3 minutes.
  • Fluo-3 AM Molecular Probes, Lei
  • Agents of the Invention typically have IC 50 S in the range from about 1000 nM down to about 1 nM or less.
  • the Agents of the Invention may be used for preventing or treating conditions of bone which are associated with increased calcium depletion or resorption or in which stimulation of bone formation and calcium fixation in the bone is desirable.
  • the invention includes a method for preventing or treating bone conditions which are associated with increased calcium depletion or resorption or in which stimulation of bone formation and calcium fixation in the bone is desirable in which an effective amount of an Agent of the Invention is administered to a patient in need of such treatment.
  • the invention includes a pharmaceutical composition for preventing or treating bone conditions which are associated with increased calcium depletion or resorption or in which stimulation of bone formation and calcium fixation in the bone is desirable comprising an Agent of the Invention in admixture with a pharmaceutically acceptable excipient, diluent or carrier.
  • Agents of the Invention are accordingly indicated for preventing or treating all bone conditions which are associated with increased calcium depletion or resorption or in which stimulation of bone formation and calcium fixation in the bone is desirable, e.g. osteoporosis of various genesis (e.g. juvenile, menopausal, post-menopausal, post-traumatic, caused by old age or by corticosteroid therapy or inactivity), fractures, osteopathy, including acute and chronic states associated with skeletal demineralisation, osteo-malacia, periodontal bone loss or bone loss due to arthritis or osteoarthritis or for treating hypoparathyroidism.
  • osteoporosis of various genesis e.g. juvenile, menopausal, post-menopausal, post-traumatic, caused by old age or by corticosteroid therapy or inactivity
  • fractures e.g. juvenile, menopausal, post-menopausal, post-traumatic, caused by old age or by corticosteroid therapy or inactivity
  • fractures
  • Further diseases and disorders which might be prevented or treated include e.g. seizures, stroke, head trauma, spinal cord injury, hypoxia-induced nerve cell damage such as in cardiac arrest or neonatal distress, epilepsy, neurodegenerative diseases such as Alzheimer's disease, Huntington's disease and Parkinson's disease, dementia, muscle tension, depression, anxiety, panic disorder, obsessive-compulsive disorder, post-traumatic stress disorder, schizophrenia, neuroleptic malignant syndrome, congestive heart failure; hypertension; gut motility disorders such as diarrhoea, and spastic colon and dermatological disorders, e.g. in tissue healing, for example burns, ulcerations and wounds.
  • neurodegenerative diseases such as Alzheimer's disease, Huntington's disease and Parkinson's disease, dementia, muscle tension, depression, anxiety, panic disorder, obsessive-compulsive disorder, post-traumatic stress disorder, schizophrenia, neuroleptic malignant syndrome, congestive heart failure; hypertension; gut motility disorders such as diarrhoea, and spastic colon
  • Agents of the Invention are particularly indicated for preventing or treating osteoporosis of various genesis.
  • an indicated daily dosage is in the range from about 0.03 to about 300 mg preferably 0.03 to 30, more preferably 0.1 to 10 mg of a compound of the invention.
  • Agents of the Invention may be administered twice a day or up to twice a week.
  • the Agents of the Invention may be administered in free form or in pharmaceutically acceptable salt form. Such salts may be prepared in conventional manner and exhibit the same order of activity as the free compounds.
  • the present invention also provides a pharmaceutical composition comprising an Agent of the Invention in free base form or in pharmaceutically acceptable salt form in association with a pharmaceutically acceptable diluent or carrier. Such compositions may be formulated in conventional manner.
  • the Agents of the Invention may be administered by any conventional route, for example parenterally e.g. in form of injectable solutions, microemulsions or suspensions, enterally, e.g. orally, for example in the form of tablets or capsules or in a transdermal, nasal or a suppository form.
  • the Agents of the Invention may be employed as adjunct or adjuvant to other therapy, e.g. a therapy using a bone resorption inhibitor, for example as in osteoporosis therapy, in particular a therapy employing calcium, a calcitonin or an analogue or derivative thereof, e.g. salmon, eel or human calcitonin, a steroid hormone, e.g. an estrogen, a partial estrogen agonist or estrogen-gestagen combination, a SERM (Selective Estrogen Receptor Modulator) e.g.
  • a therapy using a bone resorption inhibitor for example as in osteoporosis therapy
  • raloxifene lasofoxifene, apeledoxifene, arzoxifene, FC1271, Tibolone (Livial ®), a RANKL antibody, e.g. denosumab, a cathepsin K inhibitor, vitamin D or an analogue thereof or PTH, a PTH fragment or a PTH derivative e.g. PTH (1-84), PTH (1-34), PTH (1-36), PTH (1-38), PTH (1-3I )NH 2 or PTS 893.
  • dosages for the co-administered inhibitor will of course vary depending on the type of inhibitor drug employed, e.g. whether it is a steroid or a calcitonin, on the condition to be treated, whether it is a curative or preventive therapy, on the regimen and so forth.
  • the present invention further provides: a) an Agent of the Invention or a pharmaceutically acceptable salt thereof for use as a pharmaceutical;
  • the Agents of the Invention may be employed as adjunct or adjuvant to other therapy, e.g. a therapy using a bone resorption inhibitor, for example as in osteoporosis therapy, in particular a therapy employing calcium, a calcitonin or an analogue or derivative thereof, e.g. salmon, eel or human calcitonin, a steroid hormone, e.g. an estrogen, a partial estrogen agonist or estrogen-gestagen combination, a SERM (Selective Estrogen Receptor Modulator) e.g.
  • a therapy using a bone resorption inhibitor for example as in osteoporosis therapy
  • raloxifene raloxifene, lasofoxifene, TSE-424, FC1271 , Tibolone (Livial ®), vitamin D or an analogue thereof or PTH, a PTH fragment or a PTH derivative e.g. PTH (1-84), PTH (1-34), PTH (1-36), PTH (1-38), PTH (1- 3I )NH 2 or PTS 893.
  • dosages for the co-administered inhibitor will of course vary depending on the type of inhibitor drug employed, e.g. whether it is a steroid or a calcitonin, on the condition to be treated, whether it is a curative or preventive therapy, on the regimen and so forth.

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Abstract

A compound of formula (I) or a pharmaceutically acceptable salt or prodrug ester thereof, wherein the groups R2, R3, R4, Q, X and Y are as defined in the specification, is useful in the treatment of bone conditions related to increased calcium depletion or resorption.

Description

BENZOQUINAZOLINE DERIVATIVES AND THEIR USE IN TREATING BONE DISORDERS
The present invention relates to bicyclic compounds, in particular to 2-benzoquinazoline derivatives and to pharmaceutical uses thereof.
Accordingly the invention provides a compound of formula (I) or a pharmaceutically acceptable salt or prodrug ester thereof:
Figure imgf000002_0001
(I) wherein:
Q is CH or N;
R2 is C1-C4 alkyl;
Y is selected from the group consisting of: R5-O-, C1-C4 alkyl, C1-C4 alkenyl, C1-C4 alkynyl, R5-NH-;
where R5 is C1-C4 alkyl, C1-C4 alkenyl, C1-C4 alkynyl;
X is selected from the group consisting of aryl, heteroaryl, C1-C10 alky!, Ci-C10 alkyloxy, cycloalkyl, heterocycloalkyl, aryl C1-C4 alkyl, heteroaryl C1-C4 alkyl, cycloalkyl C1-C4 alkyl, heterocycloalkyl C1-C4 alkyl, arylamino, heteroarylamino, aryl C1-C4 alkylamino, heteroaryl Ci-C4 alkylamino, C1-C6 alkylamino, C1-C6 dialkylamino, aryloxy, heteroaryloxy, aryl C1-C4 alkyloxy, heteroaryl Ci-C4 alkyloxy, cycloalkyl Ci-C4 alkylamino, heterocycloalkyl Ci-C4 alkylamino, cycloalkyl CrC4 alkyloxy or heterocycloalkyl d-C4 alkyloxy each of which is optionally substituted once or more;
the optional substituent or substituents on X being independently selected from the group consisting of halo, cyano, trifluoromethyl, nitro, hydroxy, optionally substituted (CrC4 alkyl, C1-C4 alkyloxy, amino, sulfanyl, sulfonyl, amino, oxycarbonyl, hydroxyl, sulfinyl, aminosulfonyl, sulfonylamino, carbonyl, carbonyloxy, carbonyl amino, carboxyl, acyl, acylamino, or carbamoyl); the optional substituent or substituents being selected from C1-C6 alkyl, C1-C6 alkyloxy, carboxyl, hydroxyl, hydroxy C1-C4 alkyl; each of which in turn may be optionally substituted by C1-C6 alkyloxy, C1-C6 alkyl, C1-C3 fluorinated alkyl, C1-C6 alkyloxy, carboxyl, hydroxyl, hydroxy C1-C4 alkyl, halo, cyano, nitro.
R3 and R4 each represent one or more substituents independently selected from: H, halo, C1-C4 alkyl, C1-C4 alkyloxy, CF3;
the optional substituent or substituents on R3 or R4 being independently selected from the group consisting of C1-C4 alkyl, halo, C1-C4 alkyloxy, cyano, sulfanyl, sulfonyl, amino, oxycarbonyl, hydroxyl which may in turn be optionally substituted once or more by C1-C4 alkyl, halo, C1-C4 alkyloxy, cyano, sulfanyl, sulfonyl, amino, oxycarbonyl or hydroxyl.
In a second aspect, the present invention provides a compound of formula (I1) or a pharmaceutically acceptable salt or prodrug ester thereof:
Figure imgf000003_0001
(I1) wherein: Q is CH or N;
R2 is C1-C4 alkyl;
Y is selected from the group consisting of: R5-O-, C1-C4 alkyl, C1-C4 alkenyl, C1-C4 alkynyl, R5-NH-;
where R5 is selected from C1-C4 alkyl, C1-C4 alkenyl, C1-C4 alkynyl;
X is selected from the group consisting of aryl, heteroaryl, C1-C6 alkyl, cycloalkyl, heterocycloalkyl, aryl C1-C4 alkyl, heteroaryl C1-C4 alkyl, arylamino, aryl C1-C4 alkylamino, heteroaryl C1-C4 alkylamino, C1-Ce alkylamino, C1-C6 dialkylamino amino, aryloxy, heteroaryloxy, aryl C1-C4 alkyloxy, or heteroaryl C1-C4 alkyloxy, each of which is optionally substituted once or more;
the optional substituent or substituents on X being independently selected from the group consisting of Ci-C4 alkyl, halo, C1-C4 alkyloxy, cyano, trifluoromethyl, hydroxy, amino, nitro, alkyl, lower alkyl substituted (sulfanyl, sulfonyl, amino, oxycarbonyl, hydroxyl, sulfinyl, carbonyl, carboxyl, carbamoyl or aminoacyl);
R3 and R4 each represent one or more substituents independently selected from: H, halo, optionally substituted C1-C4 alkyl, optionally substituted Ci-C4 alkyloxy;
the optional substituent or substituents on R3 or R4 being independently selected from the group consisting of C1-C4 alkyl, halo, Ci-C4 alkyloxy, cyano, sulfanyl, sulfonyl, amino, oxycarbonyl, hydroxyl.
With reference to the compounds of formula (I) and (I'), Q is preferably N.
R2 is preferably isopropyl, cyclopropyl or t-butyl. More preferably, R2 is isopropyl. Alternatively, R2 is preferably cyclopropyl.
R3 and R4 are preferably halo or H. More preferably, R3 and R4 are H. Y is preferably R5-O-. More preferably, R5 is propargyl.
Preferably X is optionally substituted (aryl, heteroaryl, arylamino, heteroarylamino, aryl C1-C4 alkylamino, heteroaryl Ci-C4 alkylamino, aryloxy, heteroaryloxy, C1-C6 alkyloxy, aryl C1-C4 alkyloxy or heteroaryl Ci-C4 alkyloxy). More preferably, X is optionally substituted (aryl, heteroaryl, arylamino, heteroarylamino, aryl C1-C4 alkylamino, heteroaryl C1-C4 alkylamino, aryloxy, C1-C6 alkyloxy or aryl C1-C4 alkyloxy). Alternatively preferably X is optionally substituted (aryl, heteroaryl or heterocycloalkyl). Alternatively preferably X is optionally substituted aryl, preferably phenyl or naphthalenyl. More preferably, X is optionally substituted phenyl. Alternatively, X is optionally substituted heteroaryl. Preferred heteroaryl groups are furanyl, thienyl, pyrrolyl, thiazolyl, benzothiazolyl, pyridinyl and benz[b]thiophen-2- yl. Alternatively preferably, X is arylamino or heteroarylamino. Preferred arylamino and heteroarylamino groups are pyridinylamino, pyrazolylamino, thioazolylamino, naphthalenylamino, quinolinaylamino, isoquinolinaylamino, phthalazinylamino, benzoimidazolylamino and benzothiazolylamino. Alternatively preferably, X is aryloxy, C1-C6 alkyloxy or aryl C1-C4 alkyloxy. Alternatively preferably, X is optionally substituted heterocycloalkyl. A preferred heterocycloalkyl substituent is piperidinyl.
Alternatively, X is preferably optionally substituted (aryl, heteroaryl, cycloalkyl or heterocycloalkyl). More preferably, X is optionally substituted phenyl. Yet more preferably, X is a phenyl group substituted in the ortho- or para- position. Alternatively preferably, X is a heteroaryl which is optionally substituted. Alternatively preferably, X is optionally substituted arylamino. More preferably, X is substituted arylamino containing substituent at the meta position.
A third aspect of the invention provides a compound having the formula (II) or a pharmaceutically acceptable salt or prodrug ester thereof:
Figure imgf000006_0001
(H) wherein:
X' is selected from the group consisting of aryl, heteroaryl, cycloalkyl, heterocycloalkyl, -C1- C4 alkylaryl, -d-C4 alkylheteroaryl, arylamino, heteroarylamino, aryl Ci-C4 alkylamino, heteroaryl C1-C4 alkylamino, aryloxy, heteroaryloxy, aryl Ci-C4 alkyloxy, heteroaryl C1-C4 alkyloxy, aryl CrC4 alkyl, heteroaryl Ci-C4 alkyl, Ci-C6 alkyl, -C1-C4 alkylamino or amino, each of which is optionally substituted once or more;
the optional substituent or substituents on X' being independently selected from the group consisting of halo, cyano, trifluoromethyl, nitro, hydroxy, optionally substituted (Ci-C4 alkyl, Ci-C4 alkyloxy, amino, sulfanyl, sulfonyl, amino, oxycarbonyl, hydroxyl, sulfinyl, carbonyl, carboxyl, acyl, acylamino, carbamoyl or aminoacyl); the optional substituent or substituents being selected from CrC6 alkyl, C1-C6 alkyloxy, carboxyl, hydroxyl, hydroxy C1-C4 alkyl; each of which in turn may be optionally substituted by C1-C6 alkyloxy, C1-C6 alkyl, C1-C6 alkyloxy, carboxyl, hydroxyl, hydroxy C1-C4 alkyl, halo, cyano, nitro.
R2' is C1-C4 alkyl.
A fourth aspect of the invention provides a compound of formula (II) or a pharmaceutically acceptable sait or prodrug ester thereof:
Figure imgf000007_0001
on wherein:
X' is selected from the group consisting of aryl, heteroaryl, cycloalkyl, heterocycloalkyl, aryl C1-C4 alkyl, heteroaryl C1-C4 alkyl, aryl C1-C4 alkylamino or heteroaryl C1-C4 alkylamino, each of which is optionally substituted once or more; the optional substituent or substituents on X' being independently selected from the group consisting of C1-C4 alkyl, halo, C1-C4 alkyloxy, cyano, trifluoromethyl, hydroxy, amino, nitro, alkyl, lower alkyl substituted (sulfanyl, sulfonyl, amino, oxycarbonyl, hydroxyl, sulfinyl, carbonyl, carboxyl, carbamoyl or aminoacyl);
R2' is C1-C4 alkyl.
With reference to compounds of formula (II) and (H'), preferably R2" is isopropyl, t-butyl or cyclopropyl. More preferably, R2' is isopropyl. Alternatively, R2' is preferably cyclopropyl.
Preferably X' is optionally substituted (aryl, heteroaryl, arylamino, heteroarylamino, aryl C1-C4 alkylamino, heteroaryl C1-C4 alkylamino, aryloxy, heteroaryloxy, C1-C6 alkyloxy, aryl C1-C4 alkyloxy or heteroaryl C1-C4 alkyloxy). More preferably, X' is optionally substituted (aryl, heteroaryl, arylamino, heteroarylamino, aryl C1-C4 alkylamino, heteroaryl C1-C4 alkylamino, aryloxy, Ci-Ce alkyloxy or aryi C1-C4 alkyloxy). Alternatively preferably X' is optionally substituted (aryl, heteroaryl or heterocycloalkyl). Alternatively preferably X1 is optionally substituted aryl, preferably phenyl or naphthalenyl. More preferably, X' is optionally substituted phenyl. Alternatively, X' is optionally substituted heteroaryl. Preferred heteroaryl groups are furanyl, thienyl, pyrrolyl, thiazolyl, benzothiazolyl, pyridinyl and benz[b]thiophen-2- yl. Alternatively preferably, X' is arylamino or heteroarylamino. Preferred heteroarylamino groups are pyridinylamino, pyrazolylamino, thioazolylamino, naphthalenylamino, quinolinaylamino, isoquinolinaylamino, phthalazinylamino, benzoimidazolylamino and benzothiazolylamino. Alternatively preferably, X1 is aryloxy, Ci-C6 alkyloxy or aryl C1-C4 alkyloxy. Alternatively preferably, X' is optionally substituted heterocycloalkyl.
For the avoidance of doubt, the terms listed below are to be understood to have the following meaning throughout the present description and claims:
The term "lower", when referring to organic radicals or compounds means a compound or radical with may be branched or unbranched with up to and including 7 carbon atoms.
A lower alkyl group may be branched, unbranched or cyclic and contains 1 to 7 carbon atoms, preferably 1 to 4 carbon atoms. Lower alkyl represents, for example: methyl, ethyl, propyl, butyl, isopropyl, isobutyl, tertiary butyl or 2,2-dimethylpropyl.
A lower alkoxy group may be branched or unbranched and contains 1 to 7 carbon atoms, preferably 1 to 6 carbon atoms. Lower alkoxy represents, for example: methoxy, ethoxy, propoxy, butoxy, isopropoxy, isobutoxy or tertiary butoxy. Lower alkoxy includes cycloalkyloxy and cycloalkyl - lower alkyloxy.
A lower alkene, alkenyl or alkenoxy group is branched or unbranched and contains 2 to 7 carbon atoms, preferably 1 to 4 carbon atoms and contains at least one carbon-carbon double bond. Lower alkene, lower alkenyl or lower alkenyloxy represents for example vinyl, prop-1-enyl, allyl, butenyl, isopropenyl or isobutenyl and the oxy equivalents thereof.
A lower akyne or alkynyl group is branched or unbranched and contains 2 to 7 carbon atoms, preferably 1 to 4 carbon atoms and contains at least one carbon-carbon triple bond. Lower alkyne or lower alkynyl or lower alkenyloxy represents for example ethynyl or propynyl.
In the present application, oxygen containing substituents, e.g. alkoxy, alkenyloxy, alkynyloxy, carbonyl, etc. encompass their sulphur containing homologues, e.g. thioalkyl, alkyl-thioalkyl, thioalkenyl, alkenyl-thioalkyl, thioalkynyl, thiocarbonyl, sulphone, sulphoxide etc. HaIo or halogen represents chloro, fluoro, bromo or iodo.
Aryl represents carbocyclic aryl or biaryl.
Carbocyclic aryl is an aromatic cyclic hydrocarbon containing from 6 to 18 ring atoms. It can be monocyclic, bicyclic or tricyclic, for example naphthyl, phenyl, or phenyl mono-, di- or trisubstituted by one, two or three substituents.
Heterocyclic aryl or heteroaryl is an aromatic monocyclic or bicyclic hydrocarbon containing from 5 to 18 ring atoms one or more of which are heteroatoms selected from O, N or S. Preferably there are one or two heteroatoms. Heterocyclic aryl represents, for example: pyridyl, indolyl, quinoxalinyl, quinolinyl, isoquinolinyl, benzothienyl, benzofuranyl, benzopyranyl, benzothiopyranyl, furanyl, pyrrolyl, thiazolyl, oxazolyl, isoxazolyl, triazolyl, tetrazolyl, pyrazolyl, imidazolyl, thienyl, oxadiazolyl, benzimidazolyl. Heterocyclic aryl also includes such substituted radicals.
Cycloalkyl represents a cyclic hydrocarbon containing from 3 to 12 ring atoms preferably from 3 to 6 ring atoms. Cycloalkyl represents, for example: cyclopropyl, cyclobutyl, cyclopentyl, or cyclohexyl. The cycloalkyl may optionally be substituted.
Heterocycloalkyl represents a mono-, di- or tricyclic hydrocarbon which may be saturated or unsaturated and which contains one or more, preferably one to three heteroatoms selected from O, N or S. Preferably it contains between three and 18 ring atoms, more preferably between 3 and 8 ring atoms. The term heterocycloalkyl is intended also to include bridged heterocycloalkyl groups such as 3-hyroxy-8-aza-bicyclo[3.2.1]oct-8-yl.
Pharmaceutically acceptable salts include acid addition salts with conventional acids, for example mineral acids, e.g. hydrochloric acid, sulfuric or phosphoric acid, or organic acids, for example aliphatic or aromatic carboxylic or sulfonic acids, e.g. acetic, trifluoroacetic, propionic, succinic, glycolic, lactic, malic, tartaric, citric, ascorbic, maleic, fumaric, hydroxylmaleic, pyruvic, pamoic, methanesulfonic, toluenesulfonic, naphthalenesulfonic, sulfanilic or cyclohexylsulfamic acid; also amino acids, such as arginine and lysine. For compounds of the invention having acidic groups, for example a free carboxy group, pharmaceutically acceptable salts also represent metal or ammonium salts, such as alkali metal or alkaline earth metal salts, e.g. sodium, potassium, magnesium or calcium salts, as well as ammonium salts, which are formed with ammonia or suitable organic amines.
The agents of the invention which comprise free hydroxyl groups may also exist in the form of pharmaceutically acceptable, physiologically cleavable esters, and as such are included within the scope of the invention. Such pharmaceutically acceptable esters are preferably prodrug ester derivatives, such being convertible by solvolysis or cleavage under physiological conditions to the corresponding agents of the invention which comprise free hydroxyl groups. Suitable pharmaceutically acceptable prodrug esters are those derived from a carboxylic acid, a carbonic acid monoester or a carbamic acid, advantageously esters derived from an optionally substituted lower alkanoic acid or an arylcarboxylic acid.
Preferred compounds of formula (I) are:
(4-tert-Butyl-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
[4-(4-lsopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-phenyl-methanone
(2-Methoxy-phenyl)-[4-(4-lsopropyl-phenyl)-6- propargyloxy -quinazolin-2-yl]-methanone
(3-Methoxy-phenyl)-[4-(4-lsopropyl-phenyl)-6- propargyloxy -quinazolin-2-yl]-methanone
(4-Methoxy-phenyl)-[4-(4-lsopropyl-phenyl)-6- propargyloxy -quinazolin-2-yl]-methanone
(4-Fluoro-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
(3-Fluoro-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
(3-Chloro-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
(4-Chloro-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
(4-Fluoro-phenyl)-[4-(4-tert.butyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone (3-Fluoro-phenyl)-[4-(4-tert.butyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
(3-Bromo-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
(4-Bromo-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
(4-Methyl-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
(4-lsopropyl-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
(4-Ethyl-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
(4-Propyl-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
(4-Cyano-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
(4-Methylthio-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
(4-Methansulfonyl-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]- methanone
(4-Dimethylamino-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]- methanone
(4-Ethoxy-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
4-[4-(4-lsopropyl-phenyl)-6-propargyloxy-quinazoline-2-carbonyl]-benzoic acid methyl ester
(4-Dimethylamino-phenyl)-[4-(4-tert.butyl-phenyl)-6-propargyloxy-quinazolin-2-yl]- methanone
(4-Dimethylamino-phenyl)-[4-(4-cyclopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]- methanone 4-[4-(4-lsopropyl-phenyl)-6-propargyloxy-quinazoline-2-carbonyl]-benzoic acid ethyl ester
(4-Methoxy-phenyl)-[4-(4-tert.butyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
(4-Ethoxy-phenyl)-[4-(4-cyclopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
(3-Ethoxy-4-methoxy-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]- methanone
(4-tert.Butyloxy-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
(4-Hydroxy)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
(4-Butyloxy)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
Furan-2-yl-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
Furan-3-yl-[4-(4-tert.butyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
Furan-3-yl-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
Thiophen-2-yl-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
(3-Methyl-thiophen-2-yl-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
Benz[b]thiophen-2-yl-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
Thiophen-3-yl-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
(1-Methyl-1H-pyrrol)-2-yl-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
4-(4-lsopropyl-phenyl)-6-propargyloxy-quinazoline-2-carboxylic acid ethyl ester [4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-pyridine-3-yl-methanone
[4-(4-lsopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-naphthalen-1-yl-methanone
[4-(4-lsopropyl-phenyl)-6-propargyloxy-naphathalen-2-yl]-methanone
Benzothiazol-2-yl -[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
[4-(4-lsopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-thiazol-5-yl-methanone
[4-(4-lsopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-piperidin-1-yl-methanone
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-chloro-phenyl)- amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-methoxy-phenyl)- amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-3,4-dihydro-quinazoline-2-carboxylic acid (3- methylsulfanyl-phenyl)-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-3,4-dihydro-quinazoline-2-carboxylic acid (3- methanesulfonyl-phenyl)-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3- trifluoromethylsulfanyl-phenyl)-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-3,4-dihydro-quinazoline-2-carboxylic acid (3- sulfamoyl-phenyl)-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-3,4-dihydro-quinazoline-2-carboxylic acid [3-(2- hydroxy-ethanesulfonyl)-phenyl]-amide 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-3,4-dihydro-quinazoline-2-carboxylic acid (5- ethanesulfonyl-2-hydroxy-phenyl)-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-nitro-phenyl)-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-cyano-phenyl)- amide
3-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-benzoic acid methyl ester
3-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-benzoic acid ethyl ester
3-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-benzoic acid isopropyl ester
3-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-benzoic acid tert- butyl ester
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-carbamoyl-phenyl)- amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-acetyl-phenyl)- amide
3-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-5-methoxy- benzoic acid methyl ester
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-methylcarbamoyl- phenyl)-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-tert-butylcarbamoyl- phenyl)-amide 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-dimethylcarbamoyl- 5-trifluoromethyl-phenyl)-amide
3-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-5-trifluoromethyl- benzoic acid methyl ester
3-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-5-trifluoromethyl- benzoic acid isopropyl ester
2-Fluoro-5-{[4-(4-isopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-benzoic acid methyl ester
2-Fluoro-5-{[4-(4-isopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-benzoic acid isopropyl ester
2-Chloro-5-{[4-(4-isopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-benzoic acid methyl ester
2,5-Dichloro-3-{[4-(4-isopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}- benzoic acid methyl ester
2,5-Dichloro-3-{[4-(4-isopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}- benzoic acid isopropyl ester
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-cyano-5-fluoro- phenyl)-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3,4-dicyano-phenyl)- amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (4-cyano-3- trifluoromethyl-phenyl)-amide 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-trifluoromethyl- phenyl)-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (4-acetylamino-3- trifluoromethyl-phenyl)-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-methoxy-5- trifluoromethyl-phenyl)-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3,5-bis- trifluoromethyl-phenyl)-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-fluoro-5- trifluoromethyl-phenyl)-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (4-fluoro-3- trifluoromethyl-phenyl)-amide
3-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-2-methyl-benzoic acid methyl ester
3-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-4-methyl-benzoic acid methyl ester
3-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-4-methoxy- benzoic acid methyl ester
5-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-isophthalic acid dimethyl ester
4-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-phthalic acid dimethyl ester 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3,5-dichloro-phenyl)- amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3,4-dichloro-phenyl)- amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-chloro-4-fluoro- phenyl)-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (4-chloro-3- trifluoromethyl-phenyl)-amide
5-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-pyridine-2- carboxylic acid methyl ester
5-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-nicotinic acid methyl ester
5-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-nicotinic acid isopropyl ester
[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazolin-2-yl]-pyrrol-1-yl-methanone
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (5-methyl-1 H-pyrazol- 3-yl)-amide
(2-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-a mino}-thiazol-4-yl)-acetic acid ethyl ester 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid naphthalen-1 -ylamide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid isoquinolin-8-ylamide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid phthalazin-5-ylamide 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid quinolin-5-ylamide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid quinolin-8-ylamide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid isoquinolin-4-ylamide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (5-acetyl-quinolin-8- yl)-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-bromo-6-methoxy- quinolin-8-yl)-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid quinolin-2-ylamide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid quinolin-6-ylamide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (2-methyl-quinolin-6- yl)-amide
(β-^^-lsopropyl-phenyO-β-prop^-ynyloxy-quinazoline^-carbonylJ-aminoJ-quinolin-S- yloxy)-acetic acid ethyl ester
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (1 H-benzoimidazol-4- yl)-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid benzothiazol-2- ylamide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (benzo[1 ,3]dioxol-5- ylmethyl)-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (thiophen-2-ylmethyl)- amide 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid 3-methoxy-phenyl ester
1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid ethyl ester
1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid 1 ,2-dimethyl-propyl ester
1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid isobutyl ester
1 -(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid cyclopropyl methyl ester
1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid benzyl ester
1 -(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid 2-methoxy-benzyl ester
1 -(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid 3-methoxy-benzyl ester
1 -(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid 4-methoxycarbonyl- benzyl ester
1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid phenethyl ester
1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid 1-phenyl-ethyl ester
1 -(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid [3-(2-hydroxy- ethanesulfonyl)-phenyl]-amide
[1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinolin-3-yl]-(3-methoxy-phenyl)-methanone
[1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinolin-3-yl]-(4-methoxy-phenyl)-methanone. According to a fifth aspect of the invention there is provided a pharmaceutical composition comprising a compound of formula (I) in association with a pharmaceutically acceptable excipient, diluent or carrier.
According to a sixth aspect of the invention there is provided a compound of formula (I) for promoting the release of parathyroid hormone.
It is now well established that controlled treatment of patients with parathyroid hormone (PTH) and analogues and fragments thereof can have a pronounced anabolic effect on bone formation. Thus compounds which promote PTH release, such as the compounds of the present invention may be used for preventing or treating conditions of bone which are associated with increased calcium depletion or resorption or in which stimulation of bone formation and calcium fixation in the bone is desirable.
Thus in a seventh aspect the invention includes a method for preventing or treating bone conditions which are associated with increased calcium depletion or resorption or in which stimulation of bone formation and calcium fixation in the bone is desirable in which an effective amount of a compound of formula (I) as defined above, or a pharmaceutically- acceptable and -cleavable ester, or acid addition salt thereof is administered to a patient in need of such treatment.
In an eighth aspect the invention provides a process for preparation of a compound of formula (I) in free or salt form, comprising the step of:
(i) for cases where Q is N, reacting a compound of formula (III) with a compound of formula (IV) and an ammonium salt in the presence of a suitable solvent:
Figure imgf000021_0001
A preferred ammonium salt is ammonium acetate. Preferably the solvent contains water. Suitable solvents are ethanol/water. The presence of an oxidizing agent, e.g. DDQ is also preferred.
The compound of formula III may be prepared by any suitable route, for example, when Y is propargyloxy and R2 is isopropyl, as follows:
Figure imgf000022_0001
Fe
AcOH 2O h, rt
Figure imgf000022_0002
(ii) when Q is CH, reacting a compound of formula V
Figure imgf000022_0003
wherein LG represents a suitable leaving group, for example a Weinreb amide (N-methoxy- N-methylamide)
with an organometallic reagent of formula Vl:
X-Met Vl
where Met is Li, a Grignard reagent (-MgBr) or other suitable organometallic under suitable anhydrous conditions; or
(iii) reacting a compound of formula Va
Figure imgf000023_0001
Va with an organometallic reagent of formula Vl:
X-Met
Vl under suitable anhydrous conditions followed by oxidation to the carbonyl compound by an appropriate oxidation agent; or
(iv) reacting a compound of formula VII
Figure imgf000023_0002
with a compound X-H wherein the H forms part of an amino or hydroxy group, the reaction being carried out in the presence of a coupling reagent; or
(v) reacting a compound of formula VIII
Figure imgf000024_0001
wherein Hal is halogen or a leaving group
with a compound X-H wherein the H forms part of an amino or hydroxy group, the reaction being carried out in the presence of a coupling reagent.
The compound of formula V can be prepared by any suitable route, for example as follows: Et
Figure imgf000024_0002
P(OEt)3 A «!•«■ »■ cyclohexane
Aza-W.tt.g react.cn { roomtemp. initia,,yi then warm to 35 °C
Figure imgf000024_0003
The compounds of formula I in free form may be converted into salt forms in conventional manner and vice-versa.
The compounds of the invention can be recovered from the reaction mixture and purified in conventional manner. Isomers, such as enantiomers, may be obtained in conventional manner, e.g. by fractional crystallization or asymmetric synthesis from corresponding asymmetrically substituted, e.g. optically active starting materials.
In a ninth aspect the invention includes the use of a compound of formula (I) in the manufacture of a medicament for preventing or treating bone conditions which are associated with increased calcium depletion or resorption or in which stimulation of bone formation and calcium fixation in the bone is desirable.
In a tenth aspect the invention provides a combination comprising a therapeutically effective amount of a compound as described above and a second drug substance selected from: calcium, a calcitonin or an analogue or derivative thereof, a steroid hormone, a partial estrogen agonist or estrogen-gestagen combination, a SERM (Selective Estrogen Receptor Modulator), vitamin D or an analogue thereof or PTH, a PTH fragment or a PTH derivative for simultaneous, separate or sequential treatment.
Agents of the invention may be prepared by processes described below, which are intended to be non-limiting examples:
The analytical HPLC conditions are as follows:
Instrument and settings: Agilent 110 System with G 1311A quarternary pump (0.8 ml dead volume), G1313A autosampler (1 μl injection volume), G1316A column compartment (35° C), G1315A diode array detector (detection by UV absorption at 210 nm - 250 nm wave length), G1946A mass spectrometer with APC ionization.
Column: Waters Symmetry C8, 50 x 2.1 mm, 3.5 μm mean particle size, flow rate 1.0 ml/min. Linear gradient: 5% B in A to 95% B in A within 2.0 min.
A: water containing 5% acetonitirile and 0.1 % TFA;
B: acetonitrile containing 0.1% TFA.
Example 1 : (4-tert-Butyl-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]- methanone
Figure imgf000026_0001
A mixture of 250 mg (0.85 mmol) (2-amino-5-propargyloxy-phenyl)-(4-isopropyl-phenyl)- methanone and 20 mg (2.6 mmol) ammonium acetate is dissolved in 2.5 ml ethanol and 0.82 ml water. To this mixture, 243 mg (1.28 mmol) of (4-tert-butyl-phenyl)-oxo-acetaldehyd is added and stirring continued for 8 hours at rt. After extraction with water / diethyl ether the organic layer is dried over magnesium sulfate and concentrated under reduced pressure to yield a yellow oil. This is purified by chromatography (hexane/ethyl acetate). After concentration and drying under HV the product is treated with a mixture of diethyl ether / petroleum ether to yield a yellow solid.
m.p. 166-168 0C.
1H-NMR (300 MHz, CDCI3): 8.21 (d, 1H), 8.13 (d, 2H), 7.85 (d, 2H), 7.66-7.72 (m, 2H), 7.52 (d, 2H), 7.44 (d, 2H), 4.82 (d, 2H), 3.05 (hept, IH)1 2.64 (t, 1 H), 1.38 (s, 9H), 1.35 (d, 6H). MS: 463 (M+1 )+
Preparation of the starting material:
Figure imgf000027_0001
A mixture of 1.26 g (11.3 mmol) selenium dioxide in 11 ml of a dioxane/water (30: 1 ) is warmed to 50 0C. On obtaining a clear solution 2.0 g (11.3 mmol) of 4-tert-butyl- acetophenone is added in portions and the resulting mixture is stirred overnight at reflux. The solid parts of the resulting suspension are separated off and the solution is concentrated in vacuo. The residue is distributed between ethyl acetate and water, the organic layer dried over magnesium sulfate and concentrated. Purification by chromatography (hexane/ethyl acetate) yields (4-tert-butyl-phenyl)-oxo-acetaldehyde as a yellow oil which solidifies after drying under HV.
The compounds of the following examples are prepared in an analogous manner using the appropriate starting materials:
Example 2: [4-(4-lsopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-phenyl-methanone
Figure imgf000027_0002
1H-NMR (CDCI3, 300 MHz): 8.15 (d, 1H)1 8.12 (d, 2H), 7.80 (d, 2H), 7.65 - 7.60 (m, 2H)1 7.56 (t, IH), 7.44 (t, 2H), 7.38 (d, 2H)1 4.76 (d, 2H)1 2.99 (hept, IH), 2.59 (t, IH), 1.29 (d, 6H). MS: 407 (M+1 )+
The starting material phenylglyoxal monohydrate is commercially available. Example 3: (2-Methoxy-phenyl)-[4-(4-lsopropyl-phenyl)-6- propargyloxy -quinazolin-2-yl]- methanone
Figure imgf000028_0001
1H-NMR (CDCI3, 300 MHz): 8.17 (d, 1 H), 7.83 (dd, 1H), 7.77 (d, 2H), 7.66 - 7.61 (m, 2H),
7.52 (td, 1H), 7.39 (d, 2H), 7.09 (td, 1 H), 6.95 (d, 1H), 4.79 (d, 2H), 3.53 (s, 3H)1 3.01 (hept,
1 H), 2.63 (t, 1H), 1.32 (d, 6H).
MS: 437 (M+ 1)*
The starting material 2-methoxyphenylglyoxal hydrate is commercially available.
Example 4: (3-Methoxy-phenyl)-[4-(4-lsopropyl-phenyl)-6- propargyloxy -quinazolin-2-yl]- methanone
Figure imgf000028_0002
1H-NMR (CDCI3, 300 MHz): 8.23 (d, 1 H), 7.85 (d, 2H), 7.75 - 7.66 (m, 4H), 7.44 (d, 2H), 7.38 (t, 1H), 7.17 (ddd, 1 H), 4.82 (d, 2H), 3.88 (s, 3H), 3.04 (hept, 1H), 2.64 (t, 1 H), 1.34 (d, 6H). MS: 437 (M+ 1)+ The starting material 3-methoxyphenylglyoxal hydrate is commercially available. Example 5: (4-Methoxy-phenyl)-[4-(4-lsopropyl-phenyl)-6- propargyloxy -quinazolin-2-yl]- methanone
Figure imgf000029_0001
1H-NMR (CDCI3, 300 MHz): 8.23 (dd, 1H), 8.18 (d, 2H),7.84 (d, 2H), 7.70 - 7.65 (m, 2H),
7.43 (d, 2H), 6.97 (d, 2H)1 4.81 (d, 2H), 3.90 (s, 3H), 3.03 (hept, 1H), 2.63 (t, 1H), 1.34 (d,
6H).
MS: 437 (M+I f
The starting material 4-methoxyphenylglyoxal hydrate is prepared according to the literature, for example by SeO2 oxidation of (4-methoxy-phenyl)-ethanone.
Example 6: (4-Fluoro-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]- methanone
Figure imgf000029_0002
m. p. 124-126 0C
1H-NMR (300 MHz, CDCl3): 8.15-8.28 (m, 3H), 7.83 (d, 2H), 7.65-7.70 (m, 2H), 7.43 (d, 2H), 7.12-7.20 (m, 2H), 4.80 (d, 2H), 3.04 (hept, IH), 2.63 (t, IH), 1.33 (d, 6H).
MS: 425 (M+ 1)+ The starting material (4-fluoro-phenyl)-oxo-acetaldehyde is prepared according to the literature, for example by SeO2 oxidation of 1-(4-fluoro-phenyl)-ethanone, analogously to Example 1.
Example 7: (3-Fluoro-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]- methanone
Figure imgf000030_0001
m. p. 118-120 0C
1H-NMR (300 MHz, CDCI3): 8.19 (d, 1H), 7.97 (d, 1H), 7.91 (d, 1H), 7.83 (d, 2H)1 7.65-7.72 (m, 2H), 7.40-7.51 (m, 3H), 7.31 (td, 1H), 4.81 (d, 2H), 3.04 (hept, 1H), 2.63 (t, 1 H), 1.34 (d, 6H).
MS: 425 (M+ 1)+
The starting material (3-fluoro-phenyl)-oxo-acetaldehyde is prepared according to the literature, for example by SeO2 oxidation of 1-(3-fluoro-phenyl)-ethanone, analogously to Example 1.
Example 8: (3-Chloro-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]- methanone
Figure imgf000031_0001
m. p. 128-130 °C
1H-NMR (300 MHz, CDCI3): 8.16-8.22 (m, 2H), 8.07 (d, 1H)1 7.83 (d, 2H), 7.65-7.72 (m, 2H), 7.68 (d, 1H), 7.40-7.48 (m, 3H), 4.81 (d, 2H), 3.04 (hept, 1H), 2.63 (t, 1H), 1.34 (d, 6H).
MS: 441 (M+1)+
The starting material (3-chloro-phenyl)-oxo-acetaldehyde is prepared according to the literature, for example by SeO2 oxidation of (3-chloro-phenyl)-ethanone, analogously to Example 1.
Example 9: (4-Chloro-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]- methanone
Figure imgf000031_0002
m. p. 108-110 0C
1H-NMR (300 MHz, CDCI3): 8.12-8.20 (m, 3H), 7.83 (d, 2H), 7.65-7.72 (m, 2H), 7.40-7.50 (m, 4H), 4.81 (d, 2H), 3.04 (hept, 1H), 2.63 (t, 1H), 1.34 (d, 6H). MS: 441 (M+1)+ The starting material (4-chloro-phenyl)-oxo-acetaldehyde is prepared according to the literature, for example by SeO2 oxidation of (4-chloro-phenyl)-ethanone, analogously to Example 1.
Example 10: (4-Fluoro-phenyl)-[4-(4-tert.butyl-phenyl)-6-propargyloxy-quinazolin-2-yl]- methanone
Figure imgf000032_0001
m. p. 105-107 °C
1H-NMR (300 MHz, CDCI3): 8.15-8.27 (m, 3H), 7.84 (d, 2H), 7.65-7.72 (m, 2H), 7.59 (d, 2H), 7.17 (t, 2H), 4.81 (d, 2H), 2.63 (t, 1H), 1.41 (s, 9H).
MS: 439 (M+1 )+
The starting material (4-fluoro-phenyl)-oxo-acetaldehyde is prepared according to the literature, for example by SeO2 oxidation of (4-fluoro-phenyl)-ethanone, analogously to Example 1.
Example 11 : (3-Fluoro-phenyl)-[4-(4-tert.butyl-phenyl)-6-propargyloxy-quinazolin-2-yl]- methanone
Figure imgf000033_0001
m. p. 156-158 0C
1H-NMR (300 MHz, CDCI3): 8.20 (d, 1H), 7.97 (d, 1H), 7.91 (d, 1 H), 7.84 (d, 2H), 7.65-7.73 (m, 2H), 7.59 (d, 2H), 7.33-7.52 (m 1H), 7.31 (td, 1H), 4.81 (d, 2H), 2.63 (t, 1 H), 1.41 (s, 9H).
MS: 439 (M+ 1 )+
The starting material (3-fluoro-phenyl)-oxo-acetaldehyde is prepared according to the literature, for example by SeO2 oxidation of (3-fluoro-phenyl)-ethanone, analogously to Example 1.
Example 12: (3-Bromo-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]- methanone
Figure imgf000033_0002
m. p. 132-132 0C
1H-NMR (300 MHz, CDCI3): 8.34 (br t, 1H), 8.19 (d, 1H), 8.10 (d, 1H), 7.83 (d, 2H), 7.65-7.76 (m, 3H), 7.43 (d, 2H), 7.37 (t, 1H)1 4.81 (d, 2H), 3.03 (hept, 1H), 2.63 (t, 1H), 1.33 (d, 6H). MS: 485/487 (M+1)+ The starting material (3-bromo-phenyl)-oxo-acetaldehyde is prepared according to the literature, for example by SeO2 oxidation of (3-bromo-phenyl)-ethanone, analogously to Example 1.
Example 13: (4-Bromo-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]- methanone
Figure imgf000034_0001
m. p. 97-100 °C
1H-NMR (300 MHz, CDCI3): 8.18 (d, 1H), 8.07 (d, 2H), 7.82 (d, 2H), 7.61-7.72 (m, 4H), 7.43 (m, 2H), 4.81 (d, 2H), 3.04 (hept, 1H), 2.63 (t, 1 H), 1.34 (d, 6H).
MS: 485/487 (M+1 )+
The starting material (4-bromo-phenyl)-oxo-acetaldehyde is prepared according to the literature, for example by SeO2 oxidation of (4-bromo-phenyl)-ethanone, analogously to Example 1.
Example 14: (4-Methyl-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazoIin-2-yl]- methanone
Figure imgf000035_0001
m. p. 130-132 0C
1H-NMR (300 MHz, CDCI3): 8.18 (d, 1H), 8.06 (d, 2H), 7.83 (d, 2H), 7.63-7.70 (m, 2H), 7.12 (d, 2H), 7.29 (d, 2H), 4.80 (d, 2H), 3.03 (hept, 1H), 2.60 (t, 1 H), 2.44 (s, 3H), 1.33 (d, 6H).
MS: 421 (M+1 )+
The starting material (4-methyl-phenyl)-oxo-acetaldehyde is prepared according to the literature, for example by SeO2 oxidation of (4-methyl-phenyl)-ethanone, analogously to Example 1.
Example 15: (4-lsopropyl-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]- methanone
Figure imgf000035_0002
m. p. 132-134 0C 1H-NMR (300 MHz, CDCI3): 8.18 (d, 1H)1 8.09 (d, 2H), 7.83 (d, 2H), 7.63-7.70 (m, 2H), 7.42 (d, 2H), 7.34 (d, 2H), 4.80 (d, 2H), 3.03 (hept, 1H), 2.99 (hept, 1 H), 2.62 (t, 1 H), 1.32 (d, 6H), 1.30 (d, 6H).
MS: 449 (M+ 1 )+
The starting material (4-isopropyl-phenyl)-oxo-acetaldehyde is prepared according to the literature, for example by SeO2 oxidation of (4-isopropyl-phenyl)-ethanone, analogously to Example 1.
Example 16: (4-Ethyl-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]- methanone
Figure imgf000036_0001
m. p. 108-111 0C
1H-NMR (300 MHz, CDCI3): 8.16 (d, 1H), 8.08 (d, 2H), 7.83 (d, 2H), 7.63-7.70 (m, 2H), 7.42 (d, 2H), 7.31 (d, 2H), 4.80 (d, 2H), 3.03 (hept, 1H), 2.74 (q, 2H), 2.62 (t, 1H), 1.33 (d, 6H), 1.28 (t, 3H).
MS: 435 (M+1)+
The starting material (4-ethyl-phenyl)-oxo-acetaldehyde is prepared according to the literature, for example by SeO2 oxidation of (4-ethyl-phenyl)-ethanone, analogously to Example 1.
Example i 6a: (4-Propyi-phenyi)-[4-(4-isopropyi-phenyl)-6-propargyloxy-quinazolin-2-yl]- methanone
Figure imgf000037_0001
m. p. 140-142 0C
1H-NMR (300 MHz, CDCI3): 8.18 (d, 1H), 8.05 (d, 2H), 7.83 (d, 2H), 7.62-7.70 (m, 2H), 7.42 (d. 2H), 7.28 (d, 2H), 4.80 (d, 2H), 3.03 (hept, 1H), 2.67 (t, 2H), 2.63 (t, 1 H), 1.68 (m, 2H) 1.32 (d, 6H), 0.97 (t, 3H).
MS: 449 (M+1)+
The starting material (4-n-propyl-phenyl)-oxo-acetaldehyde is prepared according to the literature, for example by SeO2 oxidation of (4-n-propyl-phenyl)-ethanone, analogously to Example 1.
Example 17: (4-Cyano-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]- methanone
Figure imgf000037_0002
m. p. 130-132 0C 1H-NMR (300 MHz, CDCl3): 8.31 (d, 2H), 8.20 (d, IH), 7.82 (t, 4H), 7.64-7.75 (m, 2H), 7.45 (d, 2H), 4.82 (d, 2H), 3.05 (hept, IH), 2.62 (broad, IH), 1.35 (d, 6H).
MS: 432 (M+ 1)+ The starting material (4-cyano-phenyl)-oxo-acetaldehyde is prepared according to the literature, for example by SeO2 oxidation of (4-cyano-phenyl)-ethanone, analogously to Example 1.
Example 18: (4-Methylthio-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]- methanone
Figure imgf000038_0001
m. p. 161-164 0C
1H-NMR (300 MHz, CDCl3): 8.19 (d, IH), 8.11 (d, 2H), 7.84 (d, 2H), 7.64-7.72 (m, 2H), 7.43 (d, 2H), 7.31 (d, 2H), 4.81 (d, 2H), 3.04 (hept, IH), 2.63 (t, IH), 2.55 (s, 3H), 1.34 (d, 6H).
MS: 453 (M+ 1)+ The starting material (4-methylthiophenyl)-oxo-acetaldehyde is prepared according to the literature, for example by SeO2 oxidation of (4— methylthiophenyl)-ethanone, analogously to Example 1.
Example 19: (4-Methansulfonyi-ρhenyi)-[4-(4-isopropyi-phenyi)-6-propargyioxy-quinazolin-2- yl]-methanone
Figure imgf000039_0001
m. p. 181-184 0C
1H-NMR (300 MHz, CDCl3): 8.40 (d, 2H), 8.21 (d, IH), 8.10 (d, 2H), 7.84 (d, 2H), 7.70- 7.75 (m, 2H), 7.46 (d, 2H), 4.83 (d, 2H), 3.13 (s, 3H), 3.06 (hept, IH), 2.65 (broad, IH), 1.36 (d, 6H).
MS: 485 (M+ 1)+ The starting material (4-methanesulfonyl-phenyl)-oxo-acetaldehyde is prepared according to the literature, for example by SeO2 oxidation of (4-methanesulfonyl-phenyl)-ethanone, analogously to Example 1.
Example 20: (4-Dimethylamino-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2- yl]-methanone
Figure imgf000039_0002
m. p. 148-151 0C 1H-NMR (300 MHz, CDCl3): 8.18 (d, IH), 8.08 (d, 2H), 7.85 (d, 2H), 7.60-7.70 (m, 2H), 7.42 (d, 2H), 6.68 (d, 2H), 4.80 (d, 2H), 3.09 (s, 6H), 3.03 (hept, IH), 2.63 (t, IH), 1.34 (d, 6H).
MS: 450 (M+ 1)+ The starting material (4-dimethylamino-phenyl)-oxo-acetaldehyde is prepared according to the literature, for example by Seθ2 oxidation of (4-dimethylamino-phenyl)-ethanone, analogously to Example 1.
Example 21 : (4-Ethoxy-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]- methanone
Figure imgf000040_0001
m. p. 117-119 0C
1H-NMR (300 MHz, CDCl3): 8.15-8.22 (m, 3H), 7.85 (d, 2H), 7.65-7.73 (m, 2H), 7.45 (d, 2H), 6.97 (d, 2H), 4.82 (br s, 2H), 4.11 (q, 2H), 3.06 (hept, IH), 2.65 (broad, IH), 1.48 (t, 3H), 1.36 (d, 6H).
MS: 451 (M+1)+ The starting material (4-ethoxy-phenyl)-oxo-acetaldehyde is prepared according to the literature, for example by SeO2 oxidation of (4-ethoxy-phenyl)-ethanone, analogously to Example 1.
Exampie 22: 4-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazoline-2-carbonyl]-benzoic acid methyl ester
Figure imgf000041_0001
m. p. 108-110 0C
1H-NMR (300 MHz, CDCl3): 8.12-8.25 (m, 5H), 7.82 (d, 2H), 7.65-7.72 (m, 2H), 7.42 (d, 2H), 4.81 (d, 2H), 3.96 (s, 3H), 3.03 (hept, IH), 2.63 (t, IH), 1.33 (d, 6H). MS: 465 (M+l)+
The appropriate glyoxal starting material is prepared according to the literature, for example by SeO2 oxidation of 4-(2-oxo-acetyl)-benzoic acid methyl ester, analogously to Example 1.
Example 23: (4-Dimethylamino-phenyl)-[4-(4-tert.butyl-phenyl)-6-propargyloxy-quinazolin-2- yl]-methanone
Figure imgf000041_0002
m. p. 150-152 0C
1H-NMR (300 MHz, CDCl3): 8.17 (d, IH), 8.07 (d, 2H), 7.85 (d, 2H), 7.61-7.70 (m, 2H), 7.57 (d, 2H), 6.67 (d, 2H), 4.79 (d, 2H), 3.08 (s, 6H), 2.62 (t, IH), 1.40 (s, 9H). MS: 464 (M+ 1)+
The appropriate glyoxal starting material is prepared according to the literature, for example by SeO2 oxidation of the corresponding ketone, analogously to Example 1.
Example 24: (4-Dimethylamino-phenyl)-[4-(4-cyclopropyl-phenyl)-6-propargyloxy-quinazolin- 2-yl]-methanone
Figure imgf000042_0001
m. p. 169-172 0C
1H-NMR (300 MHz, CDCl3): 8.16 (d,lH), 8.07 (d, 2H), 7.80 (d, 2H), 7.60-7.66 (m, 2H), 7.23 (d, 2H), 6.67 (d, 2H), 4.78 (d, 2H), 3.08 (s, 6H), 2.62 (t, IH), 1.96-206 (m, IH), 1.04- 1.11 (m, 2H), 0.78-0.85 (m, 2H). MS: 448 (M+l)+
Example 25: 4-[4-(4-lsopropyl-phenyl)-6-propargyloxy-quinazoline-2-carbonyl]-benzoic acid ethyl ester
Figure imgf000043_0001
m. p. 132-134 0C
1H-NMR (300 MHz, CDCl3): 8.13-8.26 (m, 5H), 7.83 (d, 2H), 7.65-7.72 (m, 2H), 7.41 (d,
2H), 4.81 (d, 2H), 4.42 (q, 2H), 3.04 (hept, IH), 2.63 (t, IH), 1.43 (t, 3H), 1.33 (d, 6H). MS: 479 (M+1 )+
Example 26: (4-Methoxy-phenyl)-[4-(4-tert.butyl-phenyl)-6-propargyloxy-quinazolin-2-yl]- methanone
Figure imgf000043_0002
m. p. 150-152 0C
1H-NMR (300 MHz, CDCl3): 8.13-8.21 (m, 3H), 7.84 (d, 2H), 7.62-7.71 (m, 2H), 7.57 (d, 2H), 6.96 (d, 2H), 4.80 (d, 2H), 3.89 (s, 3H), 2.62 (broad, IH), 1.40 (s, 9H). MS: 451 (M+ 1)+ Example 27: (4-Ethoxy-phenyl)-[4-(4-cyclopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]- methanone
Figure imgf000044_0001
m. p. 147-149 0C
1H-NMR (300 MHz, CDCl3): 8.13-8.20 (m, 3H), 7.80 (d, 2H), 7.62-7.68 (m, 2H), 7.24 (d, 2H), 6.96 (d, 2H), 4.78 (d, 2H), 3.89 (s, 3H), 2.62 (broad, IH), 1.95-2.06 (m, IH), 1.03- 1.13 (m, 2H), 0.77-0.86 (m, 2H). MS: 435 (M+ 1)+
Example 28: (3-Ethoxy-4-methoxy-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin- 2-yl]-methanone
Figure imgf000044_0002
m. p. 148 0C 1H-NMR (300 MHz, CDCl3): 8.17 (d, IH), 7.80-7.86 (m, 3H), 7.63-7.75 (m, 3H), 7.12 (d, 2H), 6.88 (d, IH), 4.80 (d, 2H), 4.18 (q, 2H), 3.95 (s, 3H), 3.03 (hept, IH), 2.62 (t, IH), 1.50 (t, 3H), 1.33 (d, 6H). MS: 481 (M+1)+
Preparation of starting material:
Dess-Martin
MeMgBr periodinane
Figure imgf000045_0001
Figure imgf000045_0002
Figure imgf000045_0003
A) 1 -(3-Ethoxy-4-methoxy-phenyl)-ethanol
A solution of 2.0 g (11.1 mmol) 3-ethoxy-4-methoxy-benzaldehyde in 15 ml tetrahydrofurane is slowly trated with 4.4 ml of a etheral 3 M methylmagesiumbromide solution such that the temperature is maintained between -65 and -70 0C. After ca. 15 minutes the cooling bath is removed and the mixture allowed to come to room temperature. The resutling mixture is poured into saturated ammonium chloride solution and the alcohol extracted with diethyl ether. The combined organic layers are washed several times with brine, dried over MgSO4 and concentrated in vacuao. The crude product is directly used for the following oxidation.
1H-NMR (300 MHz, CDCl3): 6.94 (d, IH), 6.88 (dd, IH), 6.82 (d, IH), 4.84 (q, IH), 4.12 (q, 2H), 3.86 (s, 3H), 1.77 (br, OH), 1.48 (d, 3H), 1.47 (t, 3H).
B) 1 -(3-Ethoxy-4-methoxy-phenyl)-ethanone
The crude product (1.0 g; 5.10 mmol) obtained in step A is dissolved in 30 ml dichloromethane and treated at room temperature with 2.38 g (5.61 mmol) Dess-Martin periodinane. The oxidation is complete after 4 hours. The white suspension is concentrated i.V. and the prduct purified by chromatography (hexane/ethyl acetate).
m. p. 71-72 0C
1H-NMR (300 MHz, CDCl3): 7.56 (dd, IH), 7.51 (d, IH), 6.88 (d, IH), 4.16 (q, 2H), 3.94 (s, 3H), 2.56 (s, 3H), 1.49 (t, 3H).
The 1-(3-ethoxy-4-methoxy-phenyl)-ethanone thus obtained is oxidized to the corresponding glyoxal as described in example 1. Example 29: (4-tert.Butyloxy-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]- methanone
Figure imgf000046_0001
m. p. 130-132 0C
1H-NMR (300 MHz, CDCl3): 8.17 (d, IH), 8.10 (d, 2H), 7.82 (d, 2H), 7.62-7.70 (m, 2H), 7.41 (d, 2H), 7.04 (d, 2H), 4.79 (d, 2H), 3.02 (hept, IH), 2.62 (t, IH), 1.49 (s, 9H), 1.32 (d,
6H). MS: 479 (M+ 1 )+
Synthesis of 1-(4-tert.butoxy-phenyl)-ethanone as described for example 29.
Example 30: (4-Hydroxy)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
Figure imgf000046_0002
m. p. 185-187 0C 1H-NMR (300 MHz, CDCl3): 8.16 (d, IH), 8.10 (d, 2H), 7.82 (d, 2H), 7.63-7.70 (m, 2H), 7.41 (d, 2H), 6.88 (d, 2H), 5.82 (broad, OH), 4.79 (d, 2H), 3.02 (hept, IH), 2.62 (t, IH),
1.32 (d, 6H). MS: 423 (M+1 )+
Example 31 : (4-Butyloxy)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
Figure imgf000047_0001
m. p. 91-93 0C
1H-NMR (300 MHz, CDCl3): 8.12-8.20 (m, 3H), 7.83 (d, 2H), 7.63-7.70 (m, 2H), 7.42 (d, 2H), 6.94 (d, 2H), 4.81 (d, 2H), 4.05 (t, 2H), 3.03 (hept, IH), 2.62 (t, IH), 1.75-1.86 (m,
2H), 1.44-1.55 (m, 2H), 1.33 (d, 6H), 0.99 (t, 3H). MS: 479 (M+1)+
Example 32: Furan-2-yl-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
Figure imgf000047_0002
m. p. 150-151 0C
1H-NMR (300 MHz, CDCl3): 8.23-8.29 (m, IH), 8.03 (d, IH), 7.84 (d, 2H), 7.75-7.78 (m, IH), 7.64-7.70 (m, 2H), 7.45 (d, 2H), 6.63 (dd, IH), 4.80 (d, 2H), 3.05 (hept., IH), 2.62 (t,
IH), 1.35 (d, 6H). MS: 397 (M+1 )+
Preparation of furan-2-yl-oxo-acetaldehyde as described in EP 201 221.
Example 33: Furan-3-yl-[4-(4-tert.butyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
Figure imgf000048_0001
m. p. 170 0C
1H-NMR (300 MHz, CDCl3): 8.93-8.95 (m, IH), 8.24-8.27 (m, IH), 7.84 (d, 2H), 7.63- 7.70 (m, 2H), 7.61 (d, 2H), 7.48 (t, IH), 7.16 (dd, IH), 4.81 (d, 2H), 2.62 (t, IH), 1.43 (s,
9H). MS: 411 (M+1 )+
Preparation of 1-furan-3-yl-ethanone as described in EP 230 053, followed by SeO2 oxidation as described above.
Example 34: Furan-3-yl-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
Figure imgf000049_0001
m. p. 133 0C
1H-NMR (300 MHz, CDCl3): 8.93-8.95 (m, IH), 8.24-8.27 (m, IH), 7.84 (d, 2H), 7.64- 7.70 (m, 2H), 7.43-7.49 (m, 3H), 7.15-7.17 (m, IH), 4.80 (d, 2H), 3.06 (hept., IH), 2.62 (t,
IH), 1.36 (d, 6H). MS: 397 (M+1 )+
Example 35: Thiophen-2-yl-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]- methanone
Figure imgf000049_0002
m. p. 113-117 0C
1H-NMR (300 MHz, CDCl3): 8.25-8.30 (m, IH), 7.89 (d, 2H), 7.76 (dd, 2H), 7.65-7.71 (m, 2H), 7.46 (d, 2H), 7.20 (dd, IH), 4.80 (d, 2H), 3.06 (hept., IH), 2.63 (t, IH), 1.36 (d,
6H). MS: 413 (M+1 )+
Example 36: (3-Methyl-thiophen-2-yl-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]- methanone
Figure imgf000050_0001
m. p. 130-132 0C
1H-NMR (300 MHz, CDCl3): 8.24 (d, IH), 7.90 (d, 2H), 7.63-7.70 (m, 2H), 7.58 (d, IH), 7.44 (d, 2H), 7.00 (d, IH), 4.79 (d, 2H), 3.04 (hept, IH), 2.71 (s, 3H), 2.61 (t, IH), 1.34
(d, 6H). MS: 427 (M+1 )+
Example 37: Benz[b]thiophen-2-yl-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]- methanone
Figure imgf000050_0002
m. p. 167-169 0C
1H-NMR (300 MHz, CDCl3): 8.68 (s, IH), 8.28-8.33 (m, IH), 7.89-7.96 (m, 4H), 7.68-
7.74 (m, 2H), 7.37-7.50 (m, 4H), 4.81 (d, 2H), 3.07 (hept., IH), 2.64 (t, IH), 1.37 (d, 6H). MS: 463 (M+ 1 )+ Preparation of benzo[b]thiophen-2-yl-oxo-acetaldehyde as described in EP 201 221.
Example 38: Thiophen-3-yl-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]- methanone
Figure imgf000051_0001
1H-NMR (300 MHz, CDCl3): 8.80-8.84 (dd, IH), 8.20-8.25 (m, IH), 7.94 (dd, IH), 7.83 (d, 2H), 7.61-7.70 (m, 2H), 7.44 (d, 2H), 7.34 (dd, IH), 4.80 (d, 2H), 3.04 (hept., IH),
2.62 (t, IH), 1.34 (d, 6H). MS: 413 (M+1 )+
Example 39: (1-Methyl-1H-pyrrol)-2-yl-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2- yl]-methanone
Figure imgf000051_0002
m. p. 126-128 °C 1H-NMR (300 MHz, CDCl3): 8.15-8.20 (m, IH), 7.83 (d, 2H), 7.61-7.67 (m, 2H), 7.42 (d, 2H), 7.28 (dd, IH), 6.94 (t, IH), 6.18 (dd, IH), 4.78 (d, 2H), 3.03 (hept., IH), 4.12 (s, 3H),
2.61 (t, IH), 1.33 (d, 6H). MS: 410 (M+1 )+
Preparation of (1 -methyl- 1 H-pyrrol-2-yl)-oxo-acetaldehyde as described in EP 201 221.
Example 40: 4-(4-lsopropyl-phenyl)-6-propargyloxy-quinazoline-2-carboxylic acid ethyl ester
Figure imgf000052_0001
To a mixture of 2 g (6.8 mmol) (2-amino-5-propargyloxy-phenyl)-(4-isopropyl-phenyl)- methanone and 1.6 g ammonium acetate are added 7 ml water and 1.4 g (6.8 mmol) ethyl glyoxylate (50% in toluene). After vigorously stirring in the presence of air for 3 days the reaction mixture is extracted with water and CH2CI2. The organic layers are dried over MgSO4 and evaporated. Purification by flash chromatography (hexane / ethyl acetate) affords 4-(4-isopropyl-phenyl)-6-propargyloxy-quinazoline-2-carboxylic acid ethyl ester. 1H-NMR (300 MHz, CDCI3): 8.30 (d, 1H), 7.83 (d, 2H), 7.67 (dd, 1H), 7.65 (s, 1H), 7.43 (d, 2H), 4.79 (d, 2H), 4.60 (q, 2H), 3.04 (hept, 1H), 2.61 (t, 1H), 1.50 (t, 3H)1 1.34 (d, 6H) MS: 375 (M+1 )+
Example 41 : [4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-pyridine-3-yl-methanone
Figure imgf000053_0001
To a solution of 35 mg (0.085 mmol) of [4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2- yl]-pyridine-3-yl-methanol in 2 ml of acetone is added dropwise 49 μl (0.128 mmol) 2.6 M Jones reagent. An exothermic reaction takes place and the mixture turns dark. The oxidation reaction is complete after stirring for two hrs at rt. The chromium salts are filtered off and washed several times with acetone. After concentration i.V. the residue is distributed between ethyl acetate and water. Drying of the organic phase over anhydrous magnesium sulfate and evaporation of the solvent affords a yellow oil, which is purified by chromatography (dichloromethane / methanol). The product is obtained as a yellow solid.
1H-NMR (400 MHz, CDC13):9.46 (d, IH), 8.82 (dd, IH), 8.52-8.56 (m, IH), 8.22 (dd, IH), 7.84 (d, 2H), 7.68-7.71 (m, 2H), 7.42-7.49 (m, 3H), 4.81 (d, 2H), 3.03 (hept., IH),
2.63 (t, IH), 1.33 (d, 6H). MS: 408 (M+1 )+
Preparation of the starting material:
Figure imgf000054_0001
MgCl
Figure imgf000054_0002
A) [4-(4-lsopropyl-phenyl)-6-propargyloxy-quinazoline-2-yl-]methanol A solution of 1.0 g (2.67 mmol) of 4-(4-isopropyl-phenyl)-6-propargyloxy-quinazoline-2- carboxylic acid ethyl ester in 20 ml THF is cooled with a water/ice bath and treated with 1.6 ml 1 M lithium aluminum hydride solution. After complete addition the reaction mixture is quenched by pouring it into a saturated ammonium chloride / ethyl acetate solution. Extraction and concentration i.V. yields the product in the form of a yellow oil. The crude material is directly used in the following oxidation step.
B) 4-(4-lsopropyl-phenyl)-6-propargyloxy-quinazoline-2-carbaldehyde A solution of 3.9 g (11.7 mmol) of the alcohol prepared in step A in 40 ml dichloromethane is oxidized at rt with 1.1 eq Dess-Martin reagent. The mixture is filtered after stirring for 3 hrs. Distribution between ethyl acetate, water and sodium thiosulfate solution affords after concentration of the organic phases the crude aldehyde. This is purified by recrystallization from a mixture of ethyl acetate / hexanes to give a yellow-brown solid.
1H-NMR (400 MHz, CDCl3): 10.29 (s, IH), 8.25 (d, IH), 7.82 (d, 2H), 7.67-7.72 (m, 2H), 7.45 (d, 2H), 4.80 (d, 2H), 3.04 (hept., IH), 2.62 (t, IH), 1.33 (d, 6H) C) [4-(4-lsopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-pyridine-3-yl-methanol To a solution of 0.5 ml 2 M isopropyl magnesium chloride in THF is added dropwise 3- bromo-pyridine (80 mg in 0.5 ml THF) at 0 0C. After the addition stirring is continued for another 30 minutes at rt, then the reaction mixture is cooled to -70 0C and the aldehyde obtained in step B is added (120 mg in 2 ml THF). The cooling bath is removed and the mixture is warmed to rt. Extraction with dichloromethane / water affords a yellow oil which is purified by chromatography (dichloromethane / methanol).
1H-NMR (400 MHz, CDCl3): 8.93 (d, IH), 8.50 (dd, IH), 8.03 (d, IH), 7.93 (dd, IH), 7.70-7.75 (m, 2H), 7.60-7.64 (m, 2H), 7.42 (d, 2H), 7.20-7.25 (m, IH), 6.08 (d, IH), 5.34 (d. IH), 4.74-4.75 (m, 2H), 3.03 (hept., IH), 2.58 (t, IH), 1.34 (d, 6H)
The compounds of the following examples are prepared in an analogous manner using the appropriate starting materials:
Example 42: [4-(4-lsopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-naphthalen-1-yl- methanone
Figure imgf000055_0001
1H-NMR (400 MHz, CDCl3): 8.62 (d, IH), 8.16 (d, IH), 8.05 (d, IH), 7.90-7.94 (m, IH), 7.86 (dd, IH), 7.76-7.80 (m, 2H), 7.69 (d, IH), 7.65 (dd, IH), 7.48-7.60 (m, 3H), 7.39 (d,
2H), 4.79 (d, 2H), 3.00 (hept., IH), 2.62 (t, IH), 1.30 (d, 6H). MS: 457 (M+1 )+
Example 43: [4-(4-lsopropyl-phenyl)-6-propargyloxy-naphathalen-2-yl]-methanone
Figure imgf000056_0001
1H-NMR (400 MHz, CDCl3): 8.68 ( br s, IH), 8.24 (dd, IH), 8.21 (d, IH), 7.84-7.97 (m, 5H), 7.73 (d, IH), 7.69 (dd, IH), 7.59-7.63 (m, IH), 7.51-7.56 (m, IH), 7.43 (d, 2H), 4.81
(d, 2H), 3.02 (hept., IH), 2.63 (t, IH), 1.32 (d, 6H). MS: 457 (M+1 )+
Example 44: Benzothiazol-2-yl -[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]- methanone
Figure imgf000056_0002
1H-NMR (400 MHz, CDCl3): 8.30-8.33 (m, 2H), 8.02-8.06 (m, IH), 7.89-7.93 (m, 2H), 7.70-7.74 (m, 2H), 7.53-7.62 (m, 2H), 7.45-7.49 (m, 2H), 4.82 (d, 2H), 3.05 (hept, IH),
2.63 (t, IH), 1.35 (d, 6H). MS: 457 (M+1)+
Example 45: [4-(4-lsopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-thiazol-5-yl-methanone
Figure imgf000057_0001
A mixture of 28.3 mg (0.18 mmol) 5-trimethylsilanyl-thiazole (preparation cf. J. Org. Chem. 1988, 53, 1748), 119 mg (0.36 mmol) 4-(4-isopropyl-phenyl)-6-propargyloxy-quinazoline-2- carbaldehyde and 27.3 mg (0.18 mmol) cesium fluoride in 2 ml THF is stirred for 3 days at 60 0C. After evaporation the dark residue is chromatographed (hexane / ethyl acetate). The yellow oil obtained (alcohol) slowly tronsforms into the desired ketone on standing, which is obtained pure after another chromatographic purification.
1H-NMR (400 MHz, CDCl3): 9.26 (s, IH), 9.11 (s, IH), 8.35 (d, IH), 7.94 (d, 2H), 7.74-
7.81 (m, 2H), 7.53 (d, 2H), 4.84 (d, 2H), 3.10 (hept., IH), 2.68 (t, IH), 1.39 (d, 6H). MS: 414 (M+1 )+
Example 46: [4-(4-lsopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-piperidin-1-yl- methanone
Figure imgf000057_0002
A) 4-(4-lsopropyl-phenyl)-6-propargyloxy-quinazoline-2-carboxylic acid: A solution of 1.7 g (4.5 mmol) 4-(4-isopropyl-phenyl)-6-propargyloxy-quinazoline-2-carboxylic acid ethyl ester in 50 ml ethanol is treated at RT with 15 ml aqueous 1 M NaOH. After 1.5 h the reaction mixture is acidified with 1 M hydrochloric acid and extracted with CH2CI2. The organic layers are dried over MgSO4 and evaporated. The free acid is obtained after chromatography (hexane / ethyl acetate).
1H-NMR (300 MHz1 CDCI3): 8.28 (d, 1H), 7.81 (d, 2H)1 7.73 (dd, 1H), 7.71 (s, 1H)1 7.47 (d, 2H)1 4.81 (d, 2H)1 3.06 (hept, 1H), 2.63 (t, 1 H), 1.36 (d, 6H).
B) [4-(4-lsopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-piperidin-1-yl-methanone:
A solution of 22 mg (64 μmol) of the acid prepared above, 6.3 μl (64 μmol) piperidine, 43 mg (96 μmol) BOP, and 16 μl (96 μmmol) Hϋnig's base in 0.5 ml THF is stirred overnight. The reaction mixture is acidified with 1 M hydrochloric acid and extracted with CH2CI2. After drying over MgSO4 and evaporation of the solvent the crude product is purified by preparative reversed phase HPLC.
1H-NMR (300 MHz, DMSO-d6): 8.04 (d, 1 H), 7.80 (d, 2H)1 7.74 (dd, 1 H), 7.61 (d, 1 H), 7.49 (d, 2H), 4.94 (d, 2H), 3.74 (t. 1H), 3.63 (m, 2H), 3.17 (m, 2H), 3.02 (hept. 1H), 1.60 (m, 4H), 1.47 (m, 2H), 1.28 (d, 6H).
MS: 414 (M+l)+
The compounds of the following examples are prepared in an analogous manner using the appropriate starting materials:
Example 47: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-chloro- phenyl)-amide
Figure imgf000059_0001
1H-NMR (400 MHz1 CDCI3): 10.28 (s, 1 H), 8.31 (d, 1H), 7.88 (s, 1H), 7.84 (d, 2H), 7.78 (d, 1H), 7.71 - 7.67 (m, 2H), 7.49 (d, 2H), 7.32 (t, 1H), 7.14 (d, 1H), 4.80 (d, 2H), 3.07 (hept, 1 H), 2.62 (t, 1H), 1.37 (d, 6H). MS: 456 (M+1 )+ (isotope pattern for 1 Cl)
Example 48: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3- methoxy-phenyl)-amide
Figure imgf000059_0002
1H-NMR (300 MHz, DMSO d6): 10.66 (s, 1 H), 8.23 (d, 1H), 7.95 (d, 2H), 7.84 (dd, 1H), 7.70 (d, 1H), 7.57 (m, 1H), 7.54 (d, 2H), 7.49 (dd, 1H), 7.29 (t, 1 H)1 6.73 (dd, 1H), 5.00 (d, 2H), 3.79 (t, 1 H), 3.78 (s, 3H), 3.06 (hept, 1 H), 1.32 (d, 6H). MS: 452 (M+1 )+ Example 49: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-3,4-dihydro-quinazoline-2-carboxylic acid (3-methylsulfanyl-phenyl)-amide
Figure imgf000060_0001
1H-NMR (300 MHz, CDCI3): 10.24 (s, 1H), 8.31 (d, 1 H), 7.90 (t, 1 H), 7.85 (d, 2H), 7.72 - 7.67 (m, 2H), 7.56 (dd, 1 H)1 7.50 (d, 2H), 7.30 (t, 1H), 7.06 (dd, 1H), 4.81 (d, 2H), 3.09 (hept, 1 H), 2.64 (t, 1H), 2.55 (s, 3H), 1.39 (d, 6H). MS: 470 (M+1)+
Example 50: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-3,4-dihydro-quinazoline-2-carboxylic acid (3-methanesulfonyl-phenyl)-amide
Figure imgf000060_0002
1H-NMR (300 MHz, CDCI3): 10.47 (s, 1H), 8.48 (d, broad, 1 H), 8.32 (d, 1H), 8.16 (t, 1H), 7.85 (d, 2H), 7.75 - 7.61 (m, 4H), 7.51 (d, 2H), 4.81 (d, 2H), 3.12 (s, 3H), 3.10 (hept, 1H), 2.65 (t, 1 H), 1.40 (d, 6H). MS: 502 (M+1 )+ Example 51 : 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3- trifluoromethylsulfanyl-phenyl)-amide
Figure imgf000061_0001
1H-NMR (400 MHz, CDCI3): 10.34 (s, 1H), 8.34 (d, 1H)1 8.16 (dt, 1 H), 8.05 (m, 1H), 7.86 (d, 2H), 7.72 (dd, 1 H)1 7.69 (d, 1H), 7.51 (d, 2H), 7.48 - 7.45 (m, 2H)1 4.81 (d, 2H)1 3.09 (hept, 1H), 2.64 (t, 1 H)1 1.39 (d, 6H). MS: 522 (M+ 1 )+
Example 52: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-3,4-dihydro-quinazoline-2-carboxylic acid (3-sulfamoyl-phenyl)-amide
Figure imgf000061_0002
1H-NMR (400 MHz, DMSO d6): 8.49 (s, 1H), 8.25 (d, 1H), 8.08 (dt, 1 H), 7.98 (d, 2H), 7.85 (dd, 1H), 7.72 (d, 1H), 7.62 - 7.58 (m, 2H), 7.56 (d, 2H), 5.01 (d, 2H)1 3.80 (t, 1H)1 3.06 hept, 1H), 1.32 (d, 6H). MS: 503 (M+ 1 )*
Example 53: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-3,4-dihydro-quinazoline-2-carboxylic acid [3-(2-hydroxy-ethanesulfonyl)-phenyl]-amide
Figure imgf000062_0001
1H-NMR (300 MHz, CDCI3): 10.47 (s, 1H), 8.42 (d, broad, 1 H), 8.33 (d, 1H), 8.21 (t, 1H), 7.85 (d, 2H), 7.75 - 7.62 (m, 4H), 7.52 (d, 2H), 4.82 (d, 2H), 4.07 (m, 1H), 3.43 (m, 1H), 3.10 (hept, 1 H), 2.65 (t, 1H), 1.40 (d, 6H). MS: 532 (M+ 1 )+
Example 54: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-3,4-dihydro-quinazoline-2-carboxylic acid (5-ethanesulfonyl-2-hydroxy-phenyl)-amide
Figure imgf000062_0002
1H-NMR (400 MHz, CDCI3): 10.60 (s, 1 H), 8.34 (d, 1H), 7.82 (d, 2H)1 7.76 - 7.73 m, 2H), 7.71 (d, 1 H), 7.67 (dd, 1H), 7.50 (d, 2H), 7.23 (d, H), 4.81 (d, 2H), 3.11 (q, 2H), 3.07 (hept, 1H), 2.63 (t, 1 H), 1.37 (d, 6H), 1.28 (t, 3H). MS: 532 (M+1 )+
Example 55: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-nitro- phenyl)-amide
Figure imgf000063_0001
1H-NMR (400 MHz, CDCI3): 10.49 (s, 1 H), 8.54 (t, 1 H), 8.45 (d, 1 H), 8.33 (d, 1 H), 8.02 (dd, 1H), 7.85 (d, 2H), 7.70 (d, 1H), 7.73 (dd, 1H), 7.59 (t, 1H), 7.51 (d, 2H), 4.81 (d, 2H), 3.09 (hept, 1H), 2.63 (t, 1H), 1.38 (d, 6H). MS: 467 (M+1)+
Example 56: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-cyano- phenyl)-amide
Figure imgf000063_0002
1H-NMR (400 MHz, CDCI3): 10.40 (s, 1 H), 8.33 (d, 1 H)1 8.17 (m, 1H), 8.14 (m, 1 H), 7.84 (d, 2H), 7.72 (dd, 1H), 7.69 (d, 1H), 7.53 - 7.49 (m, 3H), 7.45 (dt, 1H), 4.81 (d, 2H), 3.08 (hept, 1 H), 2.63 (t, 1H), 1.38 (d, 6H). MS: 447 (M+1 )+
Example 57: 3-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}- benzoic acid methyl ester
Figure imgf000064_0001
1H-NMR (300 MHz, CDCI3): 10.37 (s, 1H), 8.41 (dd, 1H), 8.32 (d, 1H)1 8.21 (t, 1H), 7.86 (d, 2H), 7.83 (d, 1H), 7.72 - 7.68 (m, 2H), 7.51 (t, 1 H), 7.51 (d, 2H), 4.81 (d, 2H), 3.96 (s, 3H)1 3.10 (hept, 1H), 2.64 (t, 1H), 1.40 (d, 6H). MS: 480 (M+1)+
Example 58: 3-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}- benzoic acid ethyl ester
Figure imgf000065_0001
1H-NMR (400 MHz1 CDCI3): 10.36 (s, 1H), 8.36 (dd, 1H), 8.28 (d, 1 H), 8.22 (t, 1 H), 7.87 - 7.84 (m, 1H), 7.83 (d, 2H), 7.72 (dd, 1H), 7.68 (d, 1H), 7.50 (t, 1H), 7.49 (d, 2H), 4.80 (d, 2H), 4.41 (q, 2H), 3.08 (hept, 1 H), 2.62 (t, 1 H), 1.42 (t, 3H), 1.37 (d, 6H). MS: 494 (M+1 )+
Example 59: 3-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}- benzoic acid isopropyl ester
Figure imgf000065_0002
1H-NMR (400 MHz, CDCI3): 10.35 (s, 1H), 8.34 (ddd, 1H), 8.27 (d, 1 H), 8.22 (t, 1H), 7.85 (dt, 1H), 7.83 (d, 2H), 7.71 (dd, 1H), 7.68 (d, 1H), 7.50 (t, 1H), 7.49 (d, 2H), 5.28 (hept, 1H), 4.80 (d, 2H), 3.08 (hept, 1H), 2.63 (t, 1 H), 1.39 (d, 6H), 1.37 (d, 6H). MS: 508 (M+ 1 )* Example 60: 3-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}- benzoic acid tert-butyl ester
Figure imgf000066_0001
1H-NMR (400 MHz, DMSO d6): 10.94 (s, 1H), 8.50 (t, 1H), 8.24 (d, 1H), 8.13 (d, broad, 1 H)1 7.97 (d, 2H), 7.85 (dd, 1 H), 7.71 (d, 1H), 7.67 (d, 1H), 7.55 (d, 2H)1 7.52 (t, 1H), 5.01 (d, 2H), 3.80 (t, 1H), 3.06 (hept, 1H), 1.57 (s, 9H), 1.31 (d, 6H). MS: 522 (M+1)+
Example 61 : 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3- carbamoyl-phenyl)-amide
Figure imgf000066_0002
1H-NMR (400 MHz, CDCI3): 10.41 (s, 1H), 8.31 (d, 1 H), 8.26 (t, 1H), 8.15 (d, 1H), 7.84 (d, 2H), 7.70 (dd, 1 H), 7.68 (d, 1 H), 7.62 (d, 1 H), 7.50 (t, 1H), 7.49 (d, 2H), 6.32 (broad, 1 H)1 5.69 (broad, 1H), 4.80 (d, 2H), 3.08 (hept, 1 H), 2.63 (t, 1 H), 1.38 (d, 6H). MS: 465 (M+1 )+
Example 62: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-acetyl- phenyl)-amide
Figure imgf000067_0001
1H-NMR (400 MHz1 CDCI3): 10.38 (s, 1H), 8.30 - 8.26 (m, 3H), 7.84 (d, 2H), 7.76 (dt. 1H), 7.71 (dd, 1H), 7.68 (d, 1H), 7.52 (t, 1H), 7.50 (d, 2H), 4.80 (d, 2H), 3.08 (hept, 1 H), 2.66 (s, 3H), 2.62 (t, 1H), 1.38 (d, 6H). MS: 464 (M+1 )+
Example 63: 3-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-5- methoxy-benzoic acid methyl ester
Figure imgf000068_0001
1H-NMR (400 MHz, CDCI3): 10.34 (s, 1 H), 8.31 (d, 1 H), 8.18 (s, 1H), 7.85 (d, 2H), 7.71 - 7.68 (m, 3H), 7.49 (d, 2H), 7.37 (m, 1H), 4.80 (d, 2H), 3.93 (s, 3H), 3.90 (s, 3H), 3.08 (hept, 1H), 2.62 (t, 1 H)1 1.38 (d, 6H). MS: 510 (M+1 )+
Example 64: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3- methylcarbamoyl-phenyl)-amide
Figure imgf000068_0002
1H-NMR (400 MHz, CDCI3): 10.37 (s, 1H), 8.27 (d, 1H), 8.24 (s, 1H), 8.01 (d, 1H), 7.83 (d, 2H), 7.70 (dd, 1 H), 7.68 (m, 1H), 7.57 (d, 1 H), 7.48 (d, 2H), 7.44 (t, 1H), 6.62 (broad, 1H), 4.80 (d, 2H), 3.07 (hept, 1H), 3.05 (d, 3H), 2.63 (t, 1H), 1.37 (d, 6H). MS: 479 (M+1 )+ Example 65: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-tert- butylcarbamoyl-phenyl)-amide
Figure imgf000069_0001
1H-NMR (400 MHz, CDCI3): 10.37 (s, 1 H), 8.29 (d, 1H), 8.20 (t, 1H), 8.04 (d, broad, 1H), 7.83 (d, 2H)1 7.70 (dd, 1H), 7.68 (d, 1H), 7.53 (d, broad, 1H)1 7.49 (d, 2H), 7.45 (t, 1H), 6.14 (S1 1H), 4.80 (d, 2H), 3.07 (hept, 1 H), 2.62 (t, 1H), 1.48 (s, 9H), 1.37 (d, 6H). MS: 521 (M+1 )+
Example 66: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3- dimethylcarbamoyl-5-trifluoromethyl-phenyl)-amide
Figure imgf000069_0002
1H-NMR (400 MHz, CDCI3): 10.48 (s, 1 H), 8.33 (d, 1H)1 8.26 (s, 1 H), 8.10 (s, 1 H), 7.86 (d, 2H)1 7.74 (dd, 1 H), 7.71 (d, 1H), 7.53 (s, 1 H), 7.51 (d, 2H), 4.82 (d, 2H), 3.17 (s, 3H), 3.11 (S, 3H), 3.09 (hept, 1 H), 2.64 (t, 1 H), 1.38 (d, 6H).
MS: 561 (M+1)+
Example 67: 3-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-5- trifluoromethyl-benzoic acid methyl ester
Figure imgf000070_0001
1H-NMR (400 MHz, DMSO d6): 11-33 (s, 1H), 8.92 (s, 1H), 8.68 (s, 1H), 8.27 (d, 1H), 7.99 - 7.97 (m, 3H), 7.87 (dd, 1H), 7.73 (d, 1H), 7.57 (d, 2H), 5.02 (d, 2H), 3.95 (s, 3H), 3.81 (t, 1H), 3.08 (hept, 1H), 1.33 (d, 6H). MS: 548 (M+1 )+
Example 68: 3-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-5- trifluoromethyl-benzoic acid isopropyl ester
Figure imgf000071_0001
1H-NMR (400 MHz, CDCI3): 10.45 (s, 1H)1 8.52 (m, 2H), 8.28 (d, 1H), 8.08 (m, 1H), 7.83 (d, 2H), 7.73 (dd, 1H), 7.69 (d, 1H), 7.50 (d, 2H), 5.30 (hept, 1 H), 4.81 (d, 2H), 3.08 (hept, 1H), 2.63 (t, 1 H), 1.42 (d, 6H), 1.38 (d, 6H). MS: 576 (M+1 )+
Example 69: 2-Fluoro-5-{[4-(4-isopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]- amino}-benzoic acid methyl ester
Figure imgf000071_0002
1H-NMR (400 MHz, CDCI3): 10.33 (s, 1H), 8.38 - 8.34 (m, 1 H), 8.31 (d, 1H), 8.10 (dd, 1H), 7.83 (d, 2H), 7.71 (dd, 1 H)1 7.68 (d, 1H), 7.49 (d, 2H), 7.21 (t, 1H), 4.80 (d, 2H), 3.96 (s, 3H), 3.08 (hept, 1H)1 2.62 (t, 1H), 1.37 (d, 6H). MS: 498 (M+1)+ Example 70: 2-Fluoro-5-{[4-(4-isopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]- aminoj-benzoic acid isopropyl ester
Figure imgf000072_0001
1H-NMR (400 MHz, CDCI3): 10.30 (s, 1H), 8.30 - 8.26 (m, 2H)1 8.11 (dd, 1 H), 7.82 (d, 2H), 7.72 (dd, 1H), 7.68 (d, 1 H), 7.49 (d, 2H), 7.18 (t, 1H), 5.29 (hept, 1H), 4.80 (d, 2H), 3.07 (hept, 1H), 2.63 (t, 1H), 1.40 (d, 6H), 1.37 (d, 6H). MS: 526 (M+1 )+
Example 71 : 2-Chloro-5-{[4-(4-isopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]- aminoj-benzoic acid methyl ester
Figure imgf000073_0001
1H-NMR (400 MHz, DMSO d6): 11.06 (s, 1H), 8.46 (d, 1H), 8.25 (d, 1H), 8.16 (dd, 1 H)1 7.97 (d, 2H), 7.86 (dd, 1H), 7.72 (d, 1H), 7.63 (d, 1H), 7.56 (d, 2H), 5.02 (d, 2H), 3.91 (s, 3H), 3.80 (t, 1H)), 3.07 (hept, 1H), 1.32 (d, 6H). MS: 514 (M+1)+ (isotope pattern for 1 Cl)
Example 72: 2,5-Dichloro-3-{[4-(4-isopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2- carbonyl]-amino}-benzoic acid methyl ester
Figure imgf000073_0002
1H-NMR (400 MHz, CDCI3): 11.39 (s, 1H), 9.05 (d, 1H), 8.32 (d, 1H), 7.91 (d, 2H), 7.76 (d, 1H), 7.71 (dd, 1H), 7.61 (d, 1H), 7.47 (d, 2H), 4.82 (d, 2H), 3.96 (s, 3H), 3.06 (hept, 1H), 2.64 (t, 1H), 1.36 (d, 6H). MS: 548 (M+1 )+ (isotope pattern for 2 Cl) Example 73: 2,5-Dichloro-3-{[4-(4-isopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2- carbonyl]-amino}-benzoic acid isopropyl ester
Figure imgf000074_0001
1H-NMR (400 MHz, CDCI3): 11.36 (s, 1H)1 9.03 (d, 1H), 8.34 (d, 1H), 7.91 (d, 2H)1 7.76 (d, 1 H), 7.71 (dd, 1H), 7.54 (d, 1H)1 7.47 (d, 2H), 5.29 (hept, 1H), 4.82 (d, 2H)1 3.06 (hept, 1 H), 2.64 (t, 1H), 1.41 (d, 6H), 1.36 (d, 6H). MS: 548 (M+1)+ (isotope pattern for 2 Cl)
Example 74: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-cyano- 5-fluoro-phenyl)-amide
Figure imgf000074_0002
1H-NMR (400 MHz, CDCI3): 10.44 (s, 1H), 8.29 (d, 1H), 8.12 (dt, 1H), 7.83 - 7.81 (m, 3H), 7.73 (dd, 1H), 7.69 (d, 1H)1 7.49 (d, 2H), 7.15 (ddd, 1 H), 4.81 (d, 2H), 3.08 (hept, 1H), 2.63 (t. 1 H)1 1.37 (d, 6H). MS: 465 (M+1 )+
Example 75: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3,4- dicyano-phenyl)-amide
Figure imgf000075_0001
1H-NMR (400 MHz, CDCI3): 10.61 (s, 1H), 8.33 (d, 1 H), 8.28 (d, 1H), 8.25 (dd, 1H), 7.81 (d, 1H)1 7.81 (d, 2H), 7.74 (dd, 1 H), 7.69 (d, 1H), 7.49 (d, 2H), 4.81 (d, 2H), 3.08 (hept, 1 H)1 2.63 (t, 1H)1 1.37 (d, 6H). MS: 472 (M+1 )+
Example 76: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (4-cyano- 3-trifluoromethyl-phenyl)-amide
Figure imgf000075_0002
1H-NMR (400 MHz, CDCI3): 10.57 (s, 1 H), 8.34 (dd, 1H), 8.28 (d, 1 H), 8.16 (d, 1H)1 7.87 (d, 1H), 7.81 (d, 2H), 7.75 (dd, 1 H), 7.70 (d, 1 H), 7.50 (d, 2H), 4.81 (d, 2H), 3.08 (hept, 1H), 2.63 (t, 1 H), 1.37 (d, 6H). MS: 515 (M+1 )+
Example 77: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3- trifluoromethyl-phenyl)-amide
Figure imgf000076_0001
1H-NMR (400 MHz1 CDCI3): 10.38 (s, 1H)1 8.32 (d, 1 H)1 8.20 (d, 1H), 8.01 (s, 1H), 7.85 (d, 2H), 7.71 (dd, 1H), 7.69 (d, 1 H), 7.54 (t, 1 H), 7.50 (d, 2H)1 7.42 (d, 1H), 4.80 (d, 2H)1 3.08 (hept, 1 H), 2.63 (t, 1H), 1.38 (d, 6H). MS: 490 (M+1 )+
Example 78: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (4- acetylamino-3-trifluoromethyl-phenyl)-amide
Figure imgf000077_0001
1H-NMR (400 MHz, CDCI3): 10.32 (s, 1H)1 8.27 (d, 1H), 8.21 (s, 1 H), 8.12 (d, 1H), 7.97 (d, 1H)1 7.83 (d, 2H), 7.71 (dd, 1H), 7.67 (d, 1H), 7.49 (d, 2H), 7.44 (s, 1 H), 4.80 (d, 2H), 3.07 (hept, 1H), 2.62 (t, 1H), 2.25 (t, 1H), 1.37 (d, 6H). MS: 547 (M+ 1)+
Example 79: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3- methoxy-5-trifluoromethyl-phenyl)-amide
Figure imgf000077_0002
1H-NMR (400 MHz, CDCI3): 10.33 (s, 1H), 8,30 (d, 1H)1 8-01 (t, 1H), 7.84 (d, 2H),7.70 (dd, 1H), 7.68 (d, 1H), 7.49 (d, 2H), 7.41 (s, 1H)1 6.94 (s, 1 H)1 4.80 (d, 2H)1 3.90 (s, 3H), 3.08 (hept, 1H), 2.62 (t, 1H), 1.37 (d, 6H). MS: 520 (M+1 )+ Example 80: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3,5-bis- trifluoromethyl-phenyl)-amide
Figure imgf000078_0001
1H-NMR (400 MHz, CDCI3): 10.48 (s, 1H), 8.33 (S1 2H), 8.24 (d, 1 H)1 7.81 (d, 2H), 7.74 (dd, 1H)1 7.69 - 7.68 (m, 2H), 7.50 (d, 2H), 4.81 (d, 2H), 3.08 (hept, 1H), 2.63 (t, 1H), 1.37 (d, 6H). MS: 558 (M+1 )+
Example 81 : 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-fluoro- 5-trifluoromethyl-phenyl)-amide
Figure imgf000078_0002
1H-NMR (400 MHz, CDCI3): 10.42 (s, 1H), 8.27 (d, 1H), 8.14 (d, 1H), 7.82 (d, 2H)1 7.72 (dd, 1 H), 7.68 (d, 1 H), 7.66 (s, 1 H), 7.50 (d, 2H), 7.13 (d, 1H), 4.80 (d, 2H), 3.08 (hept, 1 H), 2.63 (t, 1 H), 1.37 (d, 6H). MS: 508 (M+1 )+
Example 82: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (4-fluoro- 3-trifluoromethyl-phenyl)-amide
Figure imgf000079_0001
1H-NMR (400 MHz, CDCI3): 10.34 (s, 1H), 8.33 (d, 1H), 8.20 (dt, 1H), 8.01 (dd, 1H), 7.85 (d, 2H), 7.72 (dd, 1H), 7.69 (d, 1H), 7.51 (d, 2H), 7.26 (t, 1 H), 4.81 (d, 2H), 3.09 (hept, 1H), 2.64 (t, 1H), 1.39 (d, 6H). MS: 508 (M+1 )+
Example 83: 3-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-2- methyl-benzoic acid methyl ester
Figure imgf000080_0001
1H-NMR (400 MHz, DMSO d6): 10.65 (s, 1 H), 8.24 (d, 1H), 8.00 (d, 2H), 7.93 (d, 1H), 7.85 (dd, 1H), 7.74 (d, 1H), 7.64 (d, 1H), 7.55 (d, 2H), 7.39 (t, 1H), 5.01 (d, 2H), 3.86 (s, 3H), 3.80 (t, 1H), 3.06 (hept, 1H), 2.47 (s, 3H), 1.31 (d, 6H). MS: 494 (M+ 1 )+
Example 84: 3-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-4- methyl-benzoic acid methyl ester
Figure imgf000080_0002
1H-NMR (400 MHz, CDCI3): 10.37 (s, 1H), 8.93 (s, 1 H), 8.33 (d, 1H), 7.88 (d, 2H), 7.81 (dd, 1H), 7.72 - 7.69 (m, 2H), 7.49 (d, 2H), 7.32 (d, 1H), 4.82 d, 2H), 3.92 (s, 3H), 3.08 (hept, 1H), 2.64 (t, 1H), 2.50 (s, 1H), 1.38 (d, 6H). MS: 494 (M+1 )+ Example 85: 3-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-4- methoxy-benzoic acid methyl ester
Figure imgf000081_0001
1H-NMR (400 MHz1 CDCI3): 10.87 (s, 1H), 9.34 (d, 1H), 8.32 (d, 1H), 7.92 (d, 2H)1 7.85 (dd, 1H), 7.72 (d, 1H), 7.68 (dd, 1H), 7.47 (d, 2H), 6.96 (d, 1H), 4.80 (t, 2H), 4.03 (s, 3H), 3.90 (s, 3H), 3.07 (hept, 1H), 2.63 (t, 1H), 1.37 (d, 6H). MS: 510 (M+1 )+
Example 86: 5-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}- isophthalic acid dimethyl ester
Figure imgf000081_0002
1H-NMR (400 MHz, CDCI3): 10.43 (s, 1H), 8.71 (d, 2H), 8.48 (t, 1H), 8.29 (d, 1 H), 7.84 (d, 2H), 7.71 (dd, 1H), 7.68 (d, 1 H), 7.50 (d, 2H), 4.80 (d, 2H), 3.97 (s, 6H), 3.08 (hept, 1H), 2.62 (t, 1H), 1.38 (d, 6H). MS: 538 (M+1 )+
Example 87: 4-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}- phthalic acid dimethyl ester
Figure imgf000082_0001
1H-NMR (400 MHz, CDCI3): 10.47 (s, 1H), 8.29 (d, 1H)1 8.25 (dd, 1H), 7.92 (d, 1H), 7.88 (d, 1H), 7.83 (d, 2H), 7.70 (dd, 1H), 7.68 (d, 1 H), 7.49 (d, 2H), 4.80 (d, 2H), 3.93 (s, 3H), 3.90 (s, 3H), 3.07 (hept, 1H); 2.62 (t, 1H), 1.37 (d, 6H). MS: 538 (M+1 )+
Example 88: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3,5- dichloro-phenyl)-amide
Figure imgf000083_0001
1H-NMR (400 MHz, CDCI3): 10.29 (s, 1H), 8.29 (d, 1H), 7.83 (d, 2H), 7.81 (d, 2H)1 7.70 (dd, 1H), 7.67 (d, 1H), 7.49 (d, 2H), 7.15 (t, 1H), 4.80 (d, 2H), 3.07 (hept, 1H), 2.62 (t, 1H), 1.37 (d, 6H). MS: 490 (M+ 1 )* (isotope pattern for 2 Cl)
Example 89: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3,4- dichloro-phenyl)-amide
Figure imgf000083_0002
1H-NMR (300 MHz, CDCI3): 10.29 s, 1H), 8.32 (d, 1H), 8.02 (d, 1H), 7.85 (d, 2H), 7.77 (dd, 1H), 7.71 (dd, 1H), 7.68 (d, 1 H), 7.50 (d, 2H), 7.46 (d, 1H), 4.81 (d, 2H), 3.10 (hept, IH), 2.64 (t, 1H), 1.40 (d, 6H). MS: 490 (M+1)+ (isotope pattern for 2 Cl) Example 90: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-chloro- 4-fluoro-phenyl)-amide
Figure imgf000084_0001
1H-NMR (400 MHz, CDCI3): 10.25 (s, 1H), 8.31 (d, 1H), 7.97 (d, 1 H), 7.84 (d, 2H), 7.77 -
7.68 (m, 3H), 7.50 (d, 2H), 7.18 (t, 1H), 4.81 (d, 2H), 3.09 (hept, 1 H), 2.63 (t, 1 H), 1.38 (d,
6H).
MS: 474 (M+1 )+ (isotope pattern for 1 Cl)
Example 91 : 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (4-chloro- 3-trifluoromethyl-phenyl )-amide
Figure imgf000084_0002
1H-NMR (400 MHz, CDCI3): 10.37 (s, 1H), 8.32 (d, 1H), 8.18 (dd, 1 H), 8.07 (d, 1H), 7.84 (d, 2H), 7.72 (dd, 1H), 7.68 (d, 1 H), 7.54 (d, 1H), 7.50 (d, 2H), 4.80 (d, 2H), 3.08 (hept, 1H), 2.63 (t, 1H), 1.38 (d, 6H). MS: 524 (M+1)+ (isotope pattern for 1 Cl)
Example 92: 5-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}- pyridine-2-carboxylic acid methyl ester
Figure imgf000085_0001
1H-NMR (400 MHz, CDCI3): 10.48 (s, 1H), 8.91 (d, 1H)1 8.75 (del, 1H), 8.31 (d, 1H)1 8.22 (d, 1H), 7.84 (d, 2H), 7.72 (dd, 1H), 7.68 (d, 1H), 7.49 (d, 2H), 4.80 (d, 2H), 4.01 (s, 3H), 3.07 (hept, 1H), 2.62 (t, 1 H), 1.37 (d, 6H). MS: 481 (M+1)+
Example 93: 5-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}- nicotinic acid methyl ester
Figure imgf000085_0002
1H-NMR (400 MHz1 DMSOd6): 11.21 (s, 1H), 9.32 (d, 1H)1 8.93 (t, 1H), 8.87 (d, 1H)1 8.26 (d, 1H), 7.97 (d, 2H), 7.86 (dd, 1H), 7.72 (d, 1H), 7.56 (d, 2H), 5.02 (d, 2H), 3.93 (s, 3H), 3.80 (t, 1H), 3.07 (hept, 1H), 1.32 (d, 6H). MS: 481 (M+1)+ Example 94: 5-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}- nicotinic acid isopropyl ester
Figure imgf000086_0001
1H-NMR (400 MHz, CDCI3): 10.60 (s, 1H)1 9.34 (d, 1H)1 9.22 (t, 1H)1 9.03 (d, 1H), 8.29 (d, 1H)1 7.81 (d, 2H)1 7.73 (dd, 1H), 7.69 (d, 1H), 7.48 (d, 2H), 5.33 (hept, 1H)1 4.80 (d, 2H), 3.07 (hept, 1H), 2.63 (t, 1 H), 1.42 (d, 6H), 1.37 (d, 6H). MS: 509 (M+1 )+
Example 95: [4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazolin-2-yl]-pyrrol-1 -yl-methanone
Figure imgf000086_0002
The intermediate (2,5-dihydro-pyrrol-i -yl)-[4-(4-isopropyl-phenyl)-6-prop-2-ynyloxy- quinazolin-2-yl]-methanone is prepared from 4-(4-isopropyl-phenyl)-6-propargyloxy- quinazoline-2-carboxylic acid and commercially available 3-pyrroline using the method described in example 46. A solution of 200 mg (0.50 mmol) of this intermediate and 150 mg (0.65 mmol) DDQ (2,3-dichloro-5,6-dicyano-p-benzoquinone) in 1 ml ethyl acetate is stirred for 18 h at RT. Water is added and the reaction mixture is extracted with ethyl acetate. The solvent is evaporated and the product is purified by flash chromatography using a ethyl acetate / hexane gradient.
1H-NMR (400 MHz1 CDCI3): 8.22 (m, 1 H)1 7.86 (d, 2H), 7.72 - 7.69 (m, 2H)1 7.64 (dd, 2H)1 7.46 (d, 2H), 6.37 (dd, 1H)1 4.83 (d, 2H)1 3.06 (hept, 1H), 2.65 (t, 1H)1 1.36 (d, 6H). MS: 396 (M+ 1 )+
Example 96: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (5- methyl-1 H-pyrazol-3-yl)-amide
Figure imgf000087_0001
1H-NMR (400 MHz1 CDCI3): 10.64 (s, 1H), 8.24 (d, 1H), 7.80 (d, 2H), 7.65 - 7.64 (m, 1H), 7.44 (d, 2H), 6.69 (broad, 1H), 4.78 (d, 2H), 3.05 hept, 1H), 2.62 (t, 1H), 2.34 (s, 3H), 1.35 (d, 6H). MS: 426 (M+1)+
Example 97: (2-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-a mino}-thiazol-4-yl)-acetic acid ethyl ester
Figure imgf000088_0001
1H-NMR (400 MHz, CDCI3): 8.28 (d, 1H), 7.86 (d, 2H), 7.72 - 7.70 (m, 2H), 7.46 (d, 2H), 6.94 (s, 1H), 4.80 (d, 2H), 4.22 (q, 2H), 3.78 (s, 2H)1 3.06 (hept, 1H), 2.62 (t, 1 H), 1.36 (d, 6H)1 1.29 (t, 3H). MS: 515 (M+1 )+
Example 98: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid naphthalen-1 -ylamide
Figure imgf000088_0002
1H-NMR (400 MHz1 CDCI3): 11.04 (s, 1H)1 8.53 (d, 1H), 8.38 (d, 1H), 8.10 (d. 1H)1 7.94 - 7.90 (m, 3H)1 7.73 - 7.71 (m, 3H), 7.61 - 7.50 (m, 5H)1 4.82 (d, 2H), 3.09 (hept, 1H)1 2.64 (t, 1H)1 1.39 (d, 6H). MS: 472 (M+1 )+
Example 99: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid isoquinolin-8-ylamide
Figure imgf000089_0001
1H-NMR (400 MHz, CDCI3): 11.28 (s, 1H), 9.64 (s, 1H), 8.70 (d, 1H), 8.61 (d, 1H), 8.37 (d, 1H), 7.91 (d, 2H), 7.81 (t, 1H), 7.75 - 7.72 (m, 3H), 7.69 (d, 1H), 7.53 (d, 2H), 4.82 (d, 2H), 3.09 (hept, 1 H), 2.65 (t, 1H), 1.39 (d, 6H). MS: 473 (M+1 )+
Example 100: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid phthalazin-5-ylamide
Figure imgf000089_0002
1H-NMR (400 MHz, CDCI3): 11.38 (s, 1H)1 10.31 (s, 1H), 9.74 (s, 1 H), 8.93 (d, 1H), 8.33 (d, 1H), 8.29 (t, 1H), 8.09 (d, 1H), 7.85 (d, 2H), 7.72 - 7.68 (m, 2H), 7.42 (d, 2H), 4.80 (s, 2H), 3.00 (hept, 1H), 2.65 (s, 1H), 1.32 (d, 6H). MS: 474 (M+ 1)+
Example 101: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid quinolin- 5-ylamide
Figure imgf000090_0001
1H-NMR (400 MHz1 CDCI3): 10.90 (s, 1H), 8.97 (dd, 1H), 8.44 (d, 2H)1 8.34 (d, 1H), 8.02 (d, 1H), 7.90 (d, 2H), 7.81 (t, 1H), 7.73 - 7.70 (m, 2H), 7.51 - 7.48 (m, 3H), 4.81 (d, 2H), 3.08 (hept, 1H), 2.64 (t, 1 H), 1.38 (d, 6H). MS: 473 (M+1 )+
Example 102: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid quinolin- 8-ylamide
Figure imgf000090_0002
1H-NMR (400 MHz1 CDCi3): 12.62 (s, IH), 9.11 (dd, 1H), 8.95 (dd, 1 H), 8.38 (d, 1H), 8.21 (dd, 1H), 8.04 (d, 2H)1 7.77 (d, 1H)1 7.69 (dd, 1H), 7.65 (t, 1H)1 7.59 (dd, 1 H), 7.52 - 7.49 (m, 3H)1 4.81 (d, 2H), 3.08 (hept, 1H), 2.64 (t, 1H), 1.38 (d, 6H). MS: 473 (M+1 )+ Example 103: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid isoquinolin-4-ylamide
Figure imgf000091_0001
1H-NMR (400 MHz, CDCI3): 10.52 (s, 1H), 9.12 (d, 1H), 9.03 (d, 1H), 8.32 (d, 1H), 8.09 (d, 1H), 7.90 (dd, 1H)1 7.86 (d, 2H), 7.71 (dd, 1H), 7.68 (d, 1 H), 7.66 (ddd, 1H), 7.57 (ddd, 1H), 7.50 (d, 2H), 4.80 (d, 2H), 3.08 (hept, 1H), 2.63 (t, 1H), 1.38 (d, 6H). MS: 473 (M+1 )+
Example 104: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (5- acetyl-quinolin-8-yl)-amide
Figure imgf000091_0002
1H-NMR (400 MHz, CDCI3): 12.92 (s, 1 H), 9.55 (dd, 1H), 9.13 (d, IH); 8.98 (dd, 1H), 8.40 (d, 1H), 8.29 (d, 1 H), 8.05 (d, 2H), 7.79 (d, 1H), 7.72 (dd, 1H)1 7.64 (dd, 1H), 7.53 (d, 2H)1 4.83 (d, 2H), 3.10 (hept, 1H), 2.78 (s, 3H), 2.66 (t, 1 H), 1.40 (d, 6H). MS: 515 (M+1 )+ Example 105: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3- bromo-6-methoxy-quinolin-8-yl)-amide
Figure imgf000092_0001
1H-NMR (400 MHz, CDCI3): 12.43 (s, 1H), 8.87 (d, 1H), 8.75 (d, 1 H), 8.39 (d, 1H), 8.22 (d, 1H), 8.02 (d, 2H), 7.78 (d, 1H)1 7.71 (dd, 1H), 7.52 (d, 2H), 6.79 (d, 1 H)1 4.83 (d, 2H), 3.98 (s, 3H), 3.11 (hept, 1H), 2.65 (t, 1 H)1 1.40 (d, 6H). MS: 581 / 583 (M+1 )+ (isotope pattern for 1 Br)
Example 106: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid quinolin- 2-ylamide
Figure imgf000092_0002
1H-NMR (400 MHz, CDCI3): 11.01 (broad, 1 H). 8.82 (d, 1H), 8.34 (d. 1H)1 8.30 (d. 1H). 7.96 (d, 1H), 7.90 (d, 2H), 7.84 (d, 1 H), 7.74 - 7.70 (m, 3H), 7.51 - 7.48 (m, 3H), 4.82 (d, 2H), 3.09 (hept, 1H), 2.64 (t, 1H), 1.39 (d, 6H). MS: 473 (M+1 )+ Example 107: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid quinolin- 6-ylamide
Figure imgf000093_0001
1H-NMR (400 MHz1 CDCI3): 10.51 (s, 1H), 8.85 (dd, 1H), 8.71 (d, 1H), 8.31 (dd, 1 H), 8.23 (dd, 1H), 8.13 (d, 1H), 7.88 (dd, 1H)1 7.86 (d, 2H), 7.70 (dd, 1H), 7.67 (d, 1 H), 7.50 (d, 2H), 7.42 (dd, 1H), 4.79 (d, 2H), 3.08 (hept, 1H), 2.62 (t, 1H)1. 1.38 (d, 6H). MS: 473 (M+1 )+
Example 108: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (2- methyl-quinolin-6-yl)-amide
Figure imgf000093_0002
1H-NMR (400 MHz, CDCI3): 10.48 (s, 1H), 8.67 (d, 1H), 8.31 (d, 1H), 8.12 (d, 1H), 8.05 (d, 1H), 7.86 (d, 2H), 7.83 (dd, 1H), 7.69 (dd, 1H)1 7.67 (d, 1H), 7.49 (d, 2H), 7.30 (d, 1H), 4.79 (d, 2H), 3.08 (hept, 1 H)1 2.75 (s, 3H)1 2.62 (t, 1 H), 1.38 (d, 6H). MS: 487 (M+1 )+
Example 109: (6-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}- quinolin-8-yloxy)-acetic acid ethyl ester
Figure imgf000094_0001
1H-NMR (400 MHz, CDCI3): 10.41 (s, 1H), 8.88 (dd, 1 H), 8.32 (d, 1H), 8.15 (dd, 1H), 7.97 (d, 1H), 7.86 (d, 2H), 7.71 (dd, 1H), 7.66 (dd, 1H), 7.50 (d, 2H), 7.43 (dd, 1H), 5.04 (s, 2H), 4.80 (d, 2H), 4.30 (q, 2H), 3.08 (hept, 1H), 2.62 (t, 1H), 1.38 (d, 6H), 1.29 (t, 1H). MS: 575 (M+1 )+
Example 110: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (1H- benzoimidazol-4-yl)-amide
Figure imgf000094_0002
1H-NMR (400 MHz, DMSO-d6): 12.68 (s, 1H), 11.19 (s, 1H), 8.32 - 8.27 (m, 3H), 7.95 (d, 2H), 7.87 (dd, 1H), 7.72 (d, 1 H), 7.59 (d, 2H), 7.34 (d, 1H), 7.27 (t, 1H), 5.02 (d, 2H), 3.81 (t, 1 H), 3.08 (hept, 1 H), 1.34 (d, 6H). MS: 575 (M+1 )+
Example 111 : 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid benzothiazol-2-ylamide
Figure imgf000095_0001
1H-NMR (400 MHz, CDCI3): 11.56 (broad, 1H), 8.30 (d, 1H), 7.90 - 7.84 (m, 4H)1 7.73 (dd, 1 H), 7.71 (d, 1H), 7.50 - 7.46 (m, 3H), 7.35 (td, 1H), 4.81 (d, 2H), 3.07 (hept, 1H), 2.63 (t, 1H), 1.37 (d, 6H). MS: 479 (M+ 1 )*
Example 112: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (benzo[1 ,3]dioxol-5-ylmethyl)-amide
Figure imgf000095_0002
1H-NMR (400 MHz, CDCI3): 8.59 (broad, 1H), 8.29 (d, 1H), 7.78 (d, 2H), 7.68 - 7.63 (m, 2H), 7.44 (d, 2H), 6.92 (s, 1H), 6.87 (d, 1H), 6.77 (d, 1H), 5.94 (s, 2H), 4.78 (d, 2H), 4.68 (m, 2H), 3.04 (hept, 1H), 2.61 (t, 1H), 1.34 (d, 6H). MS: 480 (M+ 1 )+
Example 113: 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (thiophen-2-ylmethyl)-amide
Figure imgf000096_0001
1H-NMR (400 MHz1 CDCI3): 8.65 (t, 1H), 8.24 (d, 1H), 7.77 (d, 2H), 7.66 (dd, 1H), 7.63 (d, 1 H)1 7.43 (d, 2H), 7.24 (dd, 1H), 7.09 (dd, 1H), 6.96 (dd, 1H), 4.93 (d, 2H)1 4.77 (d, 2H)1 3.03 (hept, 1H), 2.60 (t, 1H)1 1.34 (d, 6H). MS: 442 (M+ 1 )+
Example 114: 4-(4-lsopropyl-pheny1)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid 3- methoxy-phenyl ester
Figure imgf000096_0002
To a solution of 1.00 g (2.9 mmol) ) 4-(4-isopropyl-phenyi)-6-propargyioxy-quinazoiine-2- carboxylic acid in THF are added slowly 740 μl (8.7 mmol) oxalylic chloride. After 3 h at RT the solvent is evaporated and in order to remove residual oxalylic chloride, toluene is added and evaporated. A portion of the so prepared acid chloride [200 mg (0.55 mmol)] are dissolved in 0.5 ml dichloromethane before 94 μl (0.55 mmol) N-ethyldiisopropylamine and 68 mg (0.55 mmol) 3- methoxyphenol are added. After stirring overnight, 0.1 M hydrochloric acid is added and the reaction mixture is extracted with dichloromethane. The crude product is purified by flash chromatography using a ethyl acetate / hexane gradient.
1H-NMR (400 MHz, CDCI3): 8.33 (d, 1H), 7.89 (d, 2H), 7.74 - 7.69 (m, 2H), 7.46 (d, 2H), 7.35
(t, 1H), 6.95 (ddd, 1 H), 6.92 (t, 1 H), 6.86 (ddd, 1 H), 4.82 (d, 2H), 3.84 (s, 3H), 3.06 (hept,
1H), 2.65 (t, 1H), 1.36 (d, 6H).
MS: 453 (M+1 )+
Example 115: 1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid ethyl ester
Figure imgf000098_0001
Figure imgf000098_0002
Figure imgf000098_0003
Figure imgf000098_0004
Figure imgf000098_0005
A) Preparation of 4-hydroxy-phthaiic acid dimethyl ester
A solution of 50 g (270 mmol) 4-hydroxy-phthalic acid and 7.4 ml concentrated sulfuric acid in 500 ml methanol is heated under reflux for 11 h. The methanol is evaporated and the residue dissolved in dichloromethane. Upon addition of hexane the dimethyl ester precipitates as white crystals. Retention time: 1.60 min, MS: 211 (M+1 )+
B) Preparation of 4-prop-2-ynyloxy-phthalic acid dimethyl ester
To a solution of the whole amount of the product from above 105 g (1.1 mol) potassium carbonate (150 g, 1.1 mol) and 10 minutes later 43 ml (400 mmol) propargyl bromide (80% in toluene), are added. After stirring for 3 h at RT water is added and the reaction mixture is extracted with MTBE. After evaporation of the solvent the product is obtained that is used in the next step without purification. Retention time: 2.15 min, MS: 249 (M+1)+
C) Preparation of 4-prop-2-ynyloxy-phthalic acid
The product from above is dissolved in 500 ml methanol and treated with 31 g (780 mmol) sodium hydroxide dissolved in 100 ml water. After stirring overnight at RT the methanol is evaporated and the residues is taken up into water. Upon addition of concentrated hydrochloric acid at 0° C the free diacid precipitates which is dried in a vacuum oven at 70°
C.
Retention time: 1.64 min, MS: 221 (M+1)+
D) Preparation of 5-prop-2-ynyloxy-isobenzofuran-1 ,3-dione
The diacid from above (50 g, 230 mmol) is heated under reflux in 350 ml acetic anhydride for
24 h. The volatile components are evaporated and the remaining residue is dissolved in toluene and evaporated twice to remove residual acetic acid or anhydride.
A small sample is dissolved in MeOH and reacts to the corresponding mono methyl ester which is detected by HPLC-MS :
Retention time: 1.91 min, MS: 235 (M+1 )+
E) Preparation of 2-(4-isopropyl-benzoyl)-4-prop-2-ynyloxy-benzoic acid
A Grignard reagent is prepared in 400 ml THF from 66 g (330 mmol) 4-bromo- isopropylbenzene and 8.1 g Magnesium. Unreacted metallic magnesium is filtered off and the reagent solution is added dropwise at RT to a solution of 55.97 g (280 mmol) 5-prop-2- ynyloxy-isobenzofuran-1 ,3-dione in 400 ml THF. Cooling is applied to compensate for the exothermic reaction. Fifteen minutes after the end of the addition 500 ml saturated ammonium chloride solution are poured to the reaction mixture and THF is evaporated. The product is extracted with dichloromethane and purified by Flash chromatography using a ethyl acetate / hexane gradient.
1H-NMR (300 MHz, CDCI3): 10.52 (broad 1 H), 8.04 (d, 1 H), 7.65 (d, 2H)1 7.25 (d, 2H), 7.07 (dd, 1 H), 6.86 (d, 1H), 4.73 (d, 2H), 2.53 (t, 1H), 1.26 (d, 6H). Retention time: 2.42 min, MS: 323 (M+1 )+
F) Preparation of 2-(4-isopropyl-benzoyl)-4-prop-2-ynyloxy-benzoic acid methyl ester
A solution of 8.6 g (27 mmol) 2-(4-isopropyl-benzoyl)-4-prop-2-ynyloxy-benzoic acid and 710μl sulfuric acid in 50 ml methanol is heated at 60° C for 16 h. After evaporation of the solvent, water is added and the product is extracted with dichloromethane. HPLC retention time: 2.62 min, MS: 337 (M+1 )+
G) Preparation of (2-hydroxymethyl-5-prop-2-ynyloxy-phenyl)-(4-isopropyl-phenyl)-methanol
A solution of 9.14 g (27 mmol) 2-(4-isopropyl-benzoyl)-4-prop-2-ynyloxy-benzoic acid methyl ester in 60 ml THF is treated with 82 ml (82 mmol) of a solution of LiAIH4 (1 M in THF). Cooling is applied to compensate for the exothermic reaction. Ten minutes after the end of the addition 3.37 ml water are dropped very slowly to the reaction mixture followed by 2.45 ml 20% NaOH. After addition of further 9.14 ml water and stirring for 1 h at RT a white powder can be filtered off. Water is added to the filtrate and the product is extracted with dichloromethane. HPLC retention time: 2.36 min, MS: 293 (M-17)+
H) Preparation of 2-(4-isopropyl-benzoyl)-4-Prop-2-ynyloxy-benzaldehyde
To a solution of 14 g (63 mmol) pyridinium chloro chromate in 60 ml dichloromethane are added 6.5g (21 mmol) 2-hydroxymethyl-5-prop-2-ynyloxy-phenyl)-(4-isopropyl-phenyl)- methanol dissolved in 20 ml of the same solvent. After 30 minutes stirring at RT the reaction mixture is poured onto water and extracted with dichloromethane. The product is purified by flash chromatography using a ethyl acetate / hexane gradient followed by recrystallization from ethanol.
1H-NMR (400 MHz, CDCI3): 9.89 (s, 1H), 8.02 (d, 1H), 7.75 (d, 2H), 7.31 (d, 2H), 7.22 (dd,
1H), 7.03 (d, 1 H), 4.79 (d, 2H), 2.99 (hept, 1 H), 2.58 (t, 1H), 1.28 (d, 6H).
Retention time: 2.56 min, MS: 307 (M+1)+
I) Preparation of (Z)-2-Azido-3-[2-(4-isopropyl-benzoyl)-4-prop-2-ynyloxy-phenyl]-acrylic acid ethyl ester
With 10 ml ethanol 4.8 ml of a sodium ethylate solution (21% in ethanol) is diluted. To this ethoxide solution is added at 0° C 1.00 g (3.3 mmol) 2-(4-isopropyl-benzoyl)-4-prop-2- ynyloxy-benzaldehyde dissolved in 7.8 ml (13 mmol) of a 25% solution of ethyl-azidoacetate in ethanol. After 1 h the temperature is allowed to reach RT and stirring is continued overnight. The crude product is obtained after addition of water and extraction with dichloromethane.
1H-NMR (400 MHz, CDCI3): 8.20 (d, 1H), 7.76 (d, 2H), 7.31 (d, 2H), 7.15 (dd, 1H), 7.00 (d, 1H), 4.72 (d, 2H), 4.20 (q, 2H), 2.98 (hept, 1H), 2.53 (t, 1H), 1.27 (d, 6H), 1.22 (t, 3H). Retention time: 2.87 min, MS: 390 (M-28+1 )+
J) Preparation of 1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid ethyl ester
A solution of the crude product from above in 50 ml toluene is treated with 2 ml (11 mmol) triethyl phosphite. After 2 h water is added and the reaction mixture is extracted with dichloromethane. The product is purified by flash chromatography using a ethyl acetate / hexane gradient.
1H-NMR (400 MHz, CDCI3): 8.47 (s, 1H), 7.94 (d, 1H), 7.70 (d, 2H), 7.45 (dd, 1 H), 7.64 (d,
1H), 7.37 (d, 2H)1 4.72 (d, 2H), 4.50 (q, 2H), 3.00 (hept, 1H). 2.57 (t, 1H), 1.45 (t, 3H), 1.31
(d, 6H).
MS: 374 (M+ 1 )*
Example 116: 1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid 1 ,2- dimethyl-propyl ester
Figure imgf000102_0001
A) 1 -(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid
To a solution of 1.5 g (4.0 mmol) 1-(4-isopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3- carboxylic acid ethyl ester in 10 ml ethanol are added 4 ml 2 M aqueous sodium hydroxide solution. After 1 h stirring at RT the reaction mixture is set acidic with 1 M hydrochloric acid and extracted with dichloromethane.
1H-NMR (400 MHz, CDCI3): 8.58 (s, 1H), 8.03 (d, 1H), 7.70 - 7.68 (m, 3H), 7.53 (dd, 1H),
7.45 (d, 2H), 4.77 (d, 2H), 3.06 (hept, 1H), 2.59 (t, 1H), 1.37 (d, 6H).
MS: 346 (M+1)+
B) 1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid 1 ,2-dimethyl-propyl ester
To a solution of 50 mg (0.14 mmol) of the acid from above in 1 ml dichloromethane are added 19 μl (0.22 mmol) oxalyl chloride. After 2 h stirring at RT 47 μl (0.43 mmol) 3-methyl- 2-butanol are added. After completion of the reaction within 1 h, 1 ml DMSO is added and the reaction mixture is directly purified by preparative reversed phase HPLC.
1H-NMR (400 MHz, CDCI3): 8.40 (s, 1H), 7.94 (d, 1H), 7.73 (d, 2H), 7.67 (d, 1 H), 7.45 (dd,
1H), 7.37 (d, 2H)1 5.09 (quint, 1 H), 4.74 (d, 2H), 3.00 (hept, 1 H), 2.58 (t, 1H), 2.01 (oct, 1H)1
1.36 (d, 3H)1 1.32 (d, 6H), 1.05 (d, 3H), 1.03 (d, 3H).
MS: 416 (M+1 )+
The compounds of the following examples are prepared in an analogous manner using the appropriate starting materials:
Example 117: 1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid isobutyl ester
Figure imgf000103_0001
1H-NMR (400 MHz, CDCI3): 8.44 (s, 1H), 7.95 (d, 1 H), 7.72 (d, 2H), 7.67 (d, 1H), 7.46 (dd, 1H), 7.38 (d, 2H), 4.74 (d, 2H), 4.23 (d, 2H), 3.01 (hept, 1H), 2.57 (t, 1H), 2.18 (non, 1H)1 1.32 (d, 6H)1 1.05 (d, 6H). MS: 402 (M+1)+
Example 118: 1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid cyclopropylmethyl ester
Figure imgf000104_0001
1H-NMR (400 MHz, DMSO d6): 8.59 (s, 1H), 8.27 (d, 1H), 7.68 (d, 2H), 7.62 - 7.59 (m, 2H), 7.47 (d, 2H)1 4.92 (d, 2H), 4.20 (d, 2H), 3.73 (t, 1H), 3.03 (hept, 1H), 1.30 (d, 6H), 0.61 - 0.56 (m, 2H), 0.41 - 0.37 (m, 2H). MS: 400 (M+1 )+
Example 119: 1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid benzyl ester
Figure imgf000104_0002
1H-NMR (400 MHz1 CDCI3): 8.48 (s, 1H), 7.94 (d, 1H), 7.71 (d, 2H), 7.66 (d, 1H), 7.53 (d, 2H), 7.47 (dd, 1H), 7.41 - 7.34 (m, 5H), 5.50 (s, 2H)1 4.74 (d, 2H), 3.01 (hept, 1H), 2.57 (t, IH), 1.32 (d, 6H). MS: 436 (M+1)+
Example 120: 1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid 2- methoxy-benzyl ester
Figure imgf000105_0001
1H-NMR (400 MHz1 CDCI3): 8.48 (s, 1H), 7.94 (d, 1H), 7.72 (d, 2H), 7.66 (d, 1H), 7.51 (dd, 1 H)1 7.47 (dd. 1H), 7.38 (d, 2H)1 7.32 (ddd, 1H), 6.98 (td, 1H), 6.92 (d, 1H), 5.55 (s, 2H)1 4.74 (d, 2H), 3.87 (s, 3H), 3.01 (hept, 1H), 2.57 (t, 1H), 1.32 (d, 6H). MS: 466 (M+1 )+
Example 121: 1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid 3- methoxy-benzyl ester
Figure imgf000105_0002
1H-NMR (400 MHz, CDCI3): 8.48 (s, 1H)1 7.94 (d, 1H), 7.71 (d, 2H), 7.66 (d, 1H), 7.46 (dd, 1H), 7.38 (d, 2H)1 7.30 (t, 1H), 7.10 - 7.08 (m, 2H), 6.89 - 6.86 (m, IH)1 5.47 (s, 2H), 4.74 (d, H), 3.82 (s, 3H), 3.01 (hept, 1H), 2.57 (t, 1H)1 1.32 (d, 6H). MS: 466 (M+ 1 )+ Example 122: 1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid 4- methoxycarbonyl-benzyl ester
Figure imgf000106_0001
1H-NMR (400 MHz, CDCI3): 8.49 (s, 1 H), 8.06 (d, 2H), 7.95 (d, 1H), 7.71 (d, 2H)1 7.67 (d, 1H), 7.58 (d, 2H), 7.47 (dd, 1H)1 7.39 (d, 2H), 5.54 (s, 2H), 4.75 (d, 2H), 3.92 (s, 3H), 3.02 (hept, 1H), 2.58 (t, 1H), 1.33 (d, 6H). MS: 494 (M+1 T
Example 123: 1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid phenethyl ester
Figure imgf000106_0002
1H-NMR (400 MHz, CDCI3): 8.43 (s, 1H), 7.94 (d, 1H), 7.72 (d, 2H), 7.67 (d, 1H), 7.47 (dd, 1H), 7.39 (d, 2H), 7.37 - 7.30 (m, 4H), 7.26 - 7.22 (m, 1H), 4.75 (d, 2H), 4.64 (t, 2H), 3.16 (t, H), 3.02 (hept, 1H), 2.57 (t, 1H), 1.33 (d, 6H). MS: 450 (M+1 )+ Example 124: 1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid 1- phenyl-ethyl ester
Figure imgf000107_0001
1H-NMR (400 MHz, CDCI3): 8.45 (s, 1H), 7.95 (d, 1H)1 7.73 (d, 2H), 7.67 (d, 1H), 7.53 (d, 2H), 7.46 (dd, 2H), 7.40 - 7.36 (m, 4H), 7.30 (tt, 1H), 6.26 (q, 1H), 4.74 (d, 2H), 3.01 (hept, 1H)1 2.58 (t, 1 H), 1.75 (d, 3H)1 1.32 (d, 6H). MS: 450 (M+1 )+
Example 125: 1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid [3-(2- hydroxy-ethanesulfonyl)-phenyl]-amide
Figure imgf000107_0002
A solution of 75 mg (0.22 mmol) 1-(4-isopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3- carboxylic acid, 52 mg (0.22 mmol) 2-(3-aminophenylsulfonyl)ethanol 93 μl (0.54 mmol) N- ethyl-diisopropylamine and 140 mg (0.33 mmol) BOP in 1 ml THF is stirred for 1 h at RT. DMSO (1 ml) is added and the product is isolated by preparative reversed phase HPLC. 1H-NMR (400 MHz, DMSO d6): 10.80 (s, 1H), 8.66 (s, 1H), 8.49 (m, 1H), 8.31 (d, 1H), 8.29 - 8.27 (m, 1H), 7.90 (d, 2H), 7.69 (d, 1H), 7.67 - 7.62 (m, 3H), 7.52 (d, 2H), 4.95 (d, 2H), 4.90 (t, 1H)1 3.75 (t. 1H), 3.71 (q, 2H), 3.47 (t, 2H), 3.06 (hept, 1H)1 1.33 (d, 6H). MS: 529 (M+1)+
Example 126: [1 -(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinolin-3-yl]-(3-methoxy-phenyl)- methanone
Figure imgf000108_0001
A) 1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carbaldehyde
To a solution of 1.1 g (2.9 mmol) 1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3- carboxylic acid ethyl ester in 6 ml THF are added at -78° C 2.5 ml (2.9 mmol) 1.2 M DIBAH solution in toluene. The reaction mixture is allowed to reach RT and after the addition of water extracted with dichloromethane. Since a mixture of the corresponding alcohol and aldehyde is obtained the crude product dissolved in 5 ml dichloromethane is treated at RT with 1 g (4.6 mmol) pyridinium-chloro-chromate and stirred overnight. Water is added and the reaction mixture is extracted with dichloromethane. The product is purified by flash chromatography using a ethyl acetate / hexane gradient.
B) [1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinolin-3-yl]-(3-methoxy-phenyl)-methanol The Grϊgnard reagent prepared from 38 μl (0.3 mmol) 3-bromoanisole and 7.4 mg (0.3 mmol) magnesium in 0.2 ml THF is added at RT to a solution of 50 mg (0.15 mmol) of the aldehyde prepared above in 0.5 ml THF. After 10 minutes saturated ammonium chloride solution is added and the mixture is extracted with dichloromethane. The product is purified by preparative reversed phase HPLC.
C) : [1 -(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinolin-3-yl]-(3-methoxy-phenyl)methanone
A solution of 25 mg (0.057 mmol) of the alcohol prepared above in 0.5 ml dichloromethane is treated with 22 μl (0.057 mmol) Jones reagent. After stirring overnight water is added and the product is extracted with dichloromethane and recrystallized from diethyl ether. 1H-NMR (400 MHz, CDCI3): 8.38 (s, 1H), 8.00 (d, 1 H), 7.77 - 7.74 (m, 4H), 7.72 (d, 1H), 7.50 (dd, 1 H), 7.41 - 7.37 (m, 3H), 7.14 (dd, 1H), 4.77 (d, 2H), 3.86 (s, 3H), 3.01 (hept, 1 H), 2.59 (t, 1H), 1.32 (d, 6H). MS: 436 (M+1 )+
The compound of the following examples are prepared in an analogous manner using the appropriate starting materials:
Example 127: [1 -(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinolin-3-yl]-(4-methoxy-phenyl)- methanone
Figure imgf000109_0001
1H-NMR (400 MHz1 CDCI3): 8.37 (s, 1 H), 8.27 (d, 2H), 7.98 (d, 1H), 7.74 (d, 2H)1 7.70 (d, 1 H), 7.47 (dd, 1H), 7.39 (d, 2H), 6.98 (d, 2H), 4.76 (d, 2H), 3.89 (s, 3H), 3.01 (hept, 1 H), 2.59 (t, 1 H), 1.33 (d, 6H). MS: 436 (M+1 )+
The Agents of the Invention, as defined above, e.g., of formula (I), particularly as exemplified, in free or pharmaceutically acceptable acid addition salt form, exhibit pharmacological activity and are useful as pharmaceuticals, e.g. for therapy, in the treatment of diseases and conditions as hereinafter set forth.
Assay for intracellular free calcium:
A method to determine antagonism at the PcaR consists in measuring the inhibition of intracellular calcium transients stimulated by extracellular calcium.
CCL39 fibroblasts stably transfected with human PcaR are seeded at 40'0OO cells /well into 96-well Viewplates and incubated for 24 hours. Medium is then removed and replaced with fresh medium containing 2 μM Fluo-3 AM (Molecular Probes, Leiden, The Netherlands), In routine experiments, cells are incubated at 37°C, 5 % CO2 for 1 h. Afterwards, plates are washed twice with mHBS and wells are refilled with 100 μl mHBS containing the test compounds. Incubation is continued at room temperature for 15 minutes. To record changes of intracellular free calcium, plates are transferred to fluorescence-imaging plate reader (Molecular Devices, Sunnyvale, CA, USA). A baseline consisting in 5 measurements of 0.4 seconds each (laser excitation 488 nm) is recorded. Cells are then stimulated with calcium (2.5 mM final), and fluorescence changes recorded over a period of 3 minutes.
When measured in the above assays, Agents of the Invention typically have IC50S in the range from about 1000 nM down to about 1 nM or less.
It is now well established that controlled treatment of patients with parathyroid hormone (PTH) and analogues and fragments thereof can have a pronounced anabolic effect on bone formation. Thus compounds which promote PTH release, such as the Agents of the Invention may be used for preventing or treating conditions of bone which are associated with increased calcium depletion or resorption or in which stimulation of bone formation and calcium fixation in the bone is desirable. Thus in a further aspect the invention includes a method for preventing or treating bone conditions which are associated with increased calcium depletion or resorption or in which stimulation of bone formation and calcium fixation in the bone is desirable in which an effective amount of an Agent of the Invention is administered to a patient in need of such treatment.
In a yet further aspect the invention includes a pharmaceutical composition for preventing or treating bone conditions which are associated with increased calcium depletion or resorption or in which stimulation of bone formation and calcium fixation in the bone is desirable comprising an Agent of the Invention in admixture with a pharmaceutically acceptable excipient, diluent or carrier.
Agents of the Invention are accordingly indicated for preventing or treating all bone conditions which are associated with increased calcium depletion or resorption or in which stimulation of bone formation and calcium fixation in the bone is desirable, e.g. osteoporosis of various genesis (e.g. juvenile, menopausal, post-menopausal, post-traumatic, caused by old age or by corticosteroid therapy or inactivity), fractures, osteopathy, including acute and chronic states associated with skeletal demineralisation, osteo-malacia, periodontal bone loss or bone loss due to arthritis or osteoarthritis or for treating hypoparathyroidism.
Further diseases and disorders which might be prevented or treated include e.g. seizures, stroke, head trauma, spinal cord injury, hypoxia-induced nerve cell damage such as in cardiac arrest or neonatal distress, epilepsy, neurodegenerative diseases such as Alzheimer's disease, Huntington's disease and Parkinson's disease, dementia, muscle tension, depression, anxiety, panic disorder, obsessive-compulsive disorder, post-traumatic stress disorder, schizophrenia, neuroleptic malignant syndrome, congestive heart failure; hypertension; gut motility disorders such as diarrhoea, and spastic colon and dermatological disorders, e.g. in tissue healing, for example burns, ulcerations and wounds.
The Agents of the Invention are particularly indicated for preventing or treating osteoporosis of various genesis. For all the above uses, an indicated daily dosage is in the range from about 0.03 to about 300 mg preferably 0.03 to 30, more preferably 0.1 to 10 mg of a compound of the invention. Agents of the Invention may be administered twice a day or up to twice a week.
The Agents of the Invention may be administered in free form or in pharmaceutically acceptable salt form. Such salts may be prepared in conventional manner and exhibit the same order of activity as the free compounds. The present invention also provides a pharmaceutical composition comprising an Agent of the Invention in free base form or in pharmaceutically acceptable salt form in association with a pharmaceutically acceptable diluent or carrier. Such compositions may be formulated in conventional manner. The Agents of the Invention may be administered by any conventional route, for example parenterally e.g. in form of injectable solutions, microemulsions or suspensions, enterally, e.g. orally, for example in the form of tablets or capsules or in a transdermal, nasal or a suppository form.
According to a further embodiment of the invention, the Agents of the Invention may be employed as adjunct or adjuvant to other therapy, e.g. a therapy using a bone resorption inhibitor, for example as in osteoporosis therapy, in particular a therapy employing calcium, a calcitonin or an analogue or derivative thereof, e.g. salmon, eel or human calcitonin, a steroid hormone, e.g. an estrogen, a partial estrogen agonist or estrogen-gestagen combination, a SERM (Selective Estrogen Receptor Modulator) e.g. raloxifene, lasofoxifene, bazedoxifene, arzoxifene, FC1271, Tibolone (Livial ®), a RANKL antibody, e.g. denosumab, a cathepsin K inhibitor, vitamin D or an analogue thereof or PTH, a PTH fragment or a PTH derivative e.g. PTH (1-84), PTH (1-34), PTH (1-36), PTH (1-38), PTH (1-3I )NH2 or PTS 893.
When the Agents of the Invention are administered in conjunction with, e.g. as an adjuvant to bone resorption inhibition therapy, dosages for the co-administered inhibitor will of course vary depending on the type of inhibitor drug employed, e.g. whether it is a steroid or a calcitonin, on the condition to be treated, whether it is a curative or preventive therapy, on the regimen and so forth.
In accordance with the foregoing the present invention further provides: a) an Agent of the Invention or a pharmaceutically acceptable salt thereof for use as a pharmaceutical;
b) a method for preventing or treating above mentioned disorders and diseases in a subject in need of such treatment, which method comprises administering to said subject an effective amount of an Agent of the Invention or a pharmaceutically acceptable salt thereof;
c) an Agent of the Invention or a pharmaceutically acceptable salt thereof for use in the preparation of a pharmaceutical composition e.g. for use in the method as in b) above.
According to a further embodiment of the invention, the Agents of the Invention may be employed as adjunct or adjuvant to other therapy, e.g. a therapy using a bone resorption inhibitor, for example as in osteoporosis therapy, in particular a therapy employing calcium, a calcitonin or an analogue or derivative thereof, e.g. salmon, eel or human calcitonin, a steroid hormone, e.g. an estrogen, a partial estrogen agonist or estrogen-gestagen combination, a SERM (Selective Estrogen Receptor Modulator) e.g. raloxifene, lasofoxifene, TSE-424, FC1271 , Tibolone (Livial ®), vitamin D or an analogue thereof or PTH, a PTH fragment or a PTH derivative e.g. PTH (1-84), PTH (1-34), PTH (1-36), PTH (1-38), PTH (1- 3I )NH2 or PTS 893.
When the Agents of the Invention are administered in conjunction with, e.g. as an adjuvant to bone resorption inhibition therapy, dosages for the co-administered inhibitor will of course vary depending on the type of inhibitor drug employed, e.g. whether it is a steroid or a calcitonin, on the condition to be treated, whether it is a curative or preventive therapy, on the regimen and so forth.

Claims

1. A compound of formula (I) or a pharmaceutically acceptable salt or prodrug ester thereof:
Figure imgf000114_0001
(I) wherein: Q is CH or N;
R2 is C1-C4 alky!;
Y is selected from the group consisting of: R5-O-, C1-C4 alkyl, Ci-C4 alkenyl, C1-C4 alkynyl, R5-NH-;
where R5 is C1-C4 alkyl, C1-C4 alkenyl, C1-C4 alkynyl;
X is selected from the group consisting of aryl, heteroaryl, C1-C10 alkyl, C1-C10 alkyloxy, cycloalkyl, heterocycloalkyl, aryl C1-C4 alkyl, heteroaryl C1-C4 alkyl, cycloalkyl C1-C4 alkyl, heterocycloalkyl C1-C4 alkyl, arylamino, heteroarylamino, aryl C1-C4 alkylamino, heteroaryl C1-C4 alkylamino, C1-C6 alkylamino, C1-C6 dialkylamino, aryloxy, heteroaryloxy, aryl C1-C4 alkyloxy, heteroaryl C1-C4 alkyloxy, cycloalkyl C1-C4 alkylamino, heterocycloalkyl C1-C4 alkylamino, cycloalkyl C1-C4 alkyloxy or heterocycloalkyl C1-C4 alkyloxy each of which is optionally substituted once or more; the optional substituent or substituents on X being independently selected from the group consisting of halo, cyano, trifluoromethyl, nitro, hydroxy, optionally substituted (C1-C4 alkyl, C1-C4 alkyloxy, amino, sulfanyl, sulfonyl, amino, oxycarbonyl, hydroxyl, sulfinyl, aminosulfonyl, sulfonylamino, carbonyl, carbonyloxy, carbonyl amino, carboxyl, acyl, acylamino, or carbamoyl); the optional substituent or substituents being selected from C1-C6 alkyl, C1-C6 alkyloxy, carboxyl, hydroxyl, hydroxy C1-C4 alkyl; each of which in turn may be optionally substituted by C1-C6 alkyloxy, C1-C6 alkyl, C1-C3 fluorinated alkyl, C1-C6 alkyloxy, carboxyl, hydroxyl, hydroxy C1-C4 alkyl, halo, cyano, nitro.
R3 and R4 each represent one or more substituents independently selected from: H, halo, C1-C4 alkyl, C1-C4 alkyloxy, CF3;
the optional substituent or substituents on R3 or R4 being independently selected from the group consisting of C1-C4 alkyl, halo, C1-C4 alkyloxy, cyano, sulfanyl, sulfonyl, amino, oxycarbonyl, hydroxyl which may in turn be optionally substituted once or more by C1-C4 alkyl, halo, C1-C4 alkyloxy, cyano, sulfanyl, sulfonyl, amino, oxycarbonyl or hydroxyl.
2. A compound of formula (I1) or a pharmaceutically acceptable salt or prodrug ester thereof:
Figure imgf000115_0001
(I1) wherein:
Q is CH or N;
R2 is C1-C4 alkyl; Y is selected from the group consisting of: R5-O-, C1-C4 alkyl, Ci-C4 alkenyl, C1-C4 alkynyl, R5-NH-;
where R5 is C1-C4 alkyl, C1-C4 alkenyl, C1-C4 alkynyl;
X is selected from the group consisting of aryl, heteroaryl, C1-C6 alkyl, cycloalkyl, heterocycloalkyl, aryl C1-C4 alkyl, heteroaryl C1-C4 alkyl, arylamino, aryl C1-C4 alkylamino, heteroaryl C1-C4 alkylamino, CrCβ alkylamino, C1-C6 dialkylamino amino, aryloxy, heteroaryloxy, aryl C1-C4 alkyloxy, or heteroaryl C1-C4 alkyloxy, each of which is optionally substituted once or more;
the optional substituent or substituents on X being independently selected from the group consisting of C1-C4 alkyl, halo, C1-C4 alkyloxy, cyano, trifluoromethyl, hydroxy, amino, nitro, alkyl, lower alkyl substituted (sulfanyl, sulfonyl, amino, oxycarbonyl, hydroxyl, sulfinyl, carbonyl, carboxyl, carbamoyl or aminoacyl);
R3 and R4 each represent one or more substituents independently selected from: H, halo, optionally substituted C1-C4 alkyl, optionally substituted C1-C4 alkyloxy;
the optional substituent or substituents on R3 or R4 being independently selected from the group consisting of C1-C4 alkyl, halo, Ci-C4 alkyloxy, cyano, sulfanyl, sulfonyl, amino, oxycarbonyl, hydroxyl.
3. A compound of according to claim 1 having the formula (II) or a pharmaceutically acceptable salt or prodrug ester thereof:
Figure imgf000116_0001
(H) wherein:
X1 is selected from the group consisting of aryl, heteroaryl, cycloalkyl, heterocycloalkyl, -C1- C4 alkylaryl, -C1-C4 alkylheteroaryl, arylamino, heteroarylamino, aryl C1-C4 alkylamino, heteroaryl C1-C4 alkylamino, aryloxy, heteroaryloxy, aryl Ci-C4 alkyloxy, heteroaryl C1-C4 alkyloxy, aryl C1-C4 alkyl, heteroaryl C1-C4 alkyl, C1-C6 alkyl, -C1-C4 alkylamino or amino, each of which is optionally substituted once or more;
the optional substituent or substituents on X1 being independently selected from the group consisting of halo, cyano, trifluoromethyl, nitro, hydroxy, optionally substituted (Ci-C4 alkyl, C1-C4 alkyloxy, amino, sulfanyl, sulfonyl, amino, oxycarbonyl, hydroxy!, sulfinyl, carbonyl, carboxyl, acyl, acylamino, carbamoyl or aminoacyl); the optional substituent or substituents being selected from C1-C6 alkyl, C1-C6 alkyloxy, carboxyl, hydroxy!, hydroxy C1-C4 alkyl; each of which in turn may be optionally substituted by C1-C6 alkyloxy, C1-C6 alkyl, C1-C6 alkyloxy, carboxyl, hydroxyl, hydroxy C1-C4 alkyl, halo, cyano, nitro.
R2 1 is C1-C4 alkyl.
4. A compound of according to claim 1 having the formula (II) or a pharmaceutically acceptable salt or prodrug ester thereof:
Figure imgf000117_0001
(ID wherein: X' is selected from the group consisting of aryl, heteroaryl, cycloalkyl, heterocycloalkyl, C1-C4 alkylaryl, C1-C4 alkylheteroaryl, C1-C4 alkyl, C1-C4 alkylamino or amino, each of which is optionally substituted once or more; the optional substituent or substituents on X' being independently selected from the group consisting of Ci-C4 alkyl, halo, C1-C4 alkyloxy, cyano, trifluoromethyl, hydroxy, amino, nitro, alkyl, lower alkyl substituted (sulfanyl, sulfonyl, amino, oxycarbonyl, hydroxyl, sulfinyl, carbonyl, carboxyl, carbamoyl or aminoacyl);
R2 1 is C1-C4 alkyl.
5. A compound according to claim 3 or 4 wherein R2 1 is isopropyl, t-butyl or cyclopropyl.
6. A compound according to claim 2 or 3 wherein X' is optionally substituted (aryl, heteroaryl, heterocycloalkyl, arylamino, heteroarylamino, aryl C1-C4 alkylamino, heteroaryl C1-C4 alkylamino, aryloxy, heteroaryloxy, C1-C6 alkyloxy, aryl Ci-C4 alkyloxy, heteroaryl Ci-C4 alkyloxy).
7. A compound according to any one of the preceding claims selected from the following:
(4-tert-Butyl-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
[4-(4-lsopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-phenyl-methanone
(2-Methoxy-phenyl)-[4-(4-lsopropyl-phenyl)-6- propargyloxy -quinazolin-2-yl]-methanone
(3-Methoxy-phenyl)-[4-(4-lsopropyl-phenyl)-6- propargyloxy -quinazolin-2-yl]-methanone
(4-Methoxy-phenyl)-[4-(4-lsopropyl-phenyl)-6- propargyloxy -quinazolin-2-yl]-methanone
(4-Fluoro-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
(3-Fluoro-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
(3-Chloro-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone (4-Chloro-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
(4-Fluoro-phenyl)-[4-(4-tert.butyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
(3-Fluoro-phenyl)-[4-(4-tert.butyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
(3-Bromo-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-y!]-methanone
(4-Bromo-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
(4-Methyl-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
(4-lsopropyl-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
(4-Ethyl-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
(4-Propyl-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
(4-Cyano-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
(4-Methylthio-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
(4-Methansulfonyl-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]- methanone
(4-Dimethylamino-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]- methanone
(4-Ethoxy-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
4-[4-(4-lsopropyl-phenyl)-6-propargyloxy-quinazoline-2-carbonyl]-benzoic acid methyl ester (4-Dimethylamino-phenyl)-[4-(4-tert.butyl-phenyl)-6-propargyloxy-quinazolin-2-yl]- methanone
(4-Dimethylamino-phenyl)-[4-(4-cyclopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]- methanone
4-[4-(4-lsopropyl-phenyl)-6-propargyloxy-quinazoline-2-carbonyl]-benzoic acid ethyl ester
(4-Methoxy-phenyl)-[4-(4-tert.butyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
(4-Ethoxy-phenyl)-[4-(4-cyclopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
(3-Ethoxy-4-methoxy-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]- methanone
(4-tert.Butyloxy-phenyl)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
(4-Hydroxy)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
(4-Butyloxy)-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
Furan-2-yl-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
Furan-3-yl-[4-(4-tert.butyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
Furan-3-yl-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
Thiophen-2-yl-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
(3-Methyl-thiophen-2-yl-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
Benz[b]thiophen-2-yl-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-y1]-methanone
Thiophen-3-yl-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone (1-Methyl-1H-pyrrol)-2-yl-[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
4-(4-lsopropyl-phenyl)-6-propargyloxy-quinazoline-2-carboxylic acid ethyl ester
[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-pyridine-3-yl-methanone
[4-(4-lsopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-naphthalen-1-yl-methanone
[4-(4-lsopropyl-phenyl)-6-propargyloxy-naphathalen-2-yl]-methanone
Benzothiazol-2-yl -[4-(4-isopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-methanone
[4-(4-lsopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-thiazol-5-yl-methanone
[4-(4-lsopropyl-phenyl)-6-propargyloxy-quinazolin-2-yl]-piperidin-1-yl-methanone
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-chloro-phenyl)- amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-methoxy-phenyl)- amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-3,4-dihydro-quinazoline-2-carboxylic acid (3- methylsulfanyl-phenyl)-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-3,4-dihydro-quinazoline-2-carboxylic acid (3- methanesulfonyl-phenyl)-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3- trifluoromethylsulfanyl-phenyl)-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-3,4-dihydro-quinazoline-2-carboxylic acid (3- sulfamoyl-phenyl)-amide 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-3,4-dihydro-quinazoline-2-carboxylic acid [3-(2- hydroxy-ethanesulfonyl)-phenyl]-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-3,4-dihydro-quinazoline-2-carboxylic acid (5- ethanesulfonyl-2-hydroxy-phenyl)-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-nitro-phenyl)-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-cyano-phenyl)- amide
3-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-benzoic acid methyl ester
3-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-benzoic acid ethyl ester
3-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-benzoic acid isopropyl ester
3-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-benzoic acid tert- butyl ester
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-carbamoyl-phenyl)- amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-acetyl-phenyl)- amide
3-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-5-methoxy- benzoic acid methyl ester 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-methylcarbamoyl- phenyl)-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-tert-butylcarbamoyl- phenyl)-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-dimethylcarbamoyl- 5-trifluoromethyl-phenyl)-amide
3-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-5-trifluoromethyl- benzoic acid methyl ester
3-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-5-trifluoromethyl- benzoic acid isopropyl ester
2-Fluoro-5-{[4-(4-isopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-benzoic acid methyl ester
2-Fluoro-5-{[4-(4-isopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-benzoic acid isopropyl ester
2-Chloro-5-{[4-(4-isopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-benzoic acid methyl ester
2,5-Dichloro-3-{[4-(4-isopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}- benzoic acid methyl ester
2,5-Dichloro-3-{[4-(4-isopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}- benzoic acid isopropyl ester
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-cyano-5-fluoro- phenyl)-amide 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3,4-dicyano-phenyl)- amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (4-cyano-3- trifluoromethyl-phenyl)-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-trifluoromethyl- phenyl)-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (4-acetylamino-3- trifluoromethyl-phenyl)-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-methoxy-5- trifluoromethyl-phenyl)-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3,5-bis- trifluoromethyl-phenyl)-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-fluoro-5- trifluoromethyl-phenyl)-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (4-fluoro-3- trifluoromethyl-phenyl)-amide
3-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-2-methyl-benzoic acid methyl ester
3-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-4-methyl-benzoic acid methyl ester
3-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-4-methoxy- benzoic acid methyl ester 5-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-isophthalic acid dimethyl ester
4-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-phthalic acid dimethyl ester
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3,5-dichloro-phenyl)- amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3,4-dichloro-phenyl)- amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-chloro-4-fluoro- phenyl)-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (4-chloro-3- trifluoromethyl-phenyl)-amide
5-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-pyridine-2- carboxylic acid methyl ester
5-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-nicotinic acid methyl ester
5-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-nicotinic acid isopropyl ester
[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazolin-2-yl]-pyrrol-1-yl-methanone
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (5-methyl-1 H-pyrazol- 3-yl)-amide
(2-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-a mino}-thiazol-4-yl)-acetic acid ethyl ester 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid naphthalen-1 -ylamide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid isoquinolin-8-ylamide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid phthalazin-5-ylamide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid quinolin-5-ylamide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid quinolin-8-ylamide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid isoquinolin-4-ylamide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (5-acetyl-quinolin-8- yl)-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (3-bromo-6-methoxy- quinolin-8-yl)-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid quinolin-2-ylamide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid quinolin-6-ylamide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (2-methyl-quinolin-6- yl)-amide
(6-{[4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carbonyl]-amino}-quinolin-8- yloxy)-acetic acid ethyl ester
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxy!ic acid (1 H-benzoimidazol-4- yl)-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid benzothiazol-2- ylamide 4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (benzo[1 ,3]dioxol-5- ylmethyl)-amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid (thiophen-2-ylmethyl)- amide
4-(4-lsopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid 3-methoxy-phenyl ester
1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid ethyl ester
1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid 1 ,2-dimethyl-propyl ester
1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid isobutyl ester
1 -(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid cyclopropylmethyl ester
1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid benzyl ester
1 -(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid 2-methoxy-benzyl ester
1 -(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid 3-methoxy-benzyl ester
1 -(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid 4-methoxycarbonyl- benzyl ester
1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid phenethyl ester
1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinoline-3-carboxylic acid 1-phenyl-ethyl ester 1 -^-Isopropyl-phenyl^-prop^-ynyloxy-isoquinoline-S-carboxylic acid [3-(2-hydroxy- ethanesulfonyl)-phenyl]-amide
[1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinolin-3-yl]-(3-methoxy-phenyl)-methanone
[1-(4-lsopropyl-phenyl)-7-prop-2-ynyloxy-isoquinolin-3-yl]-(4-methoxy-phenyl)-methanone.
8. A pharmaceutical composition comprising a compound of formula (I) in association with a pharmaceutically acceptable excipient, diluent or carrier.
9. A compound of formula (I) for promoting the release of parathyroid hormone.
10. A method for preventing or treating bone conditions which are associated with increased calcium depletion or resorption or in which stimulation of bone formation and calcium fixation in the bone is desirable in which an effective amount of a compound of formula (I) as defined above, or a pharmaceutically-acceptable and -cleavable ester, or acid addition salt thereof is administered to a patient in need of such treatment.
11. A process for preparation of a compound of formula (I) in free or salt form, comprising the step of:
(i) for cases where Q is N1 reacting a compound of formula (III) with a compound of formula (IV) and an ammonium salt in the presence of a suitable solvent:
Figure imgf000128_0001
or
(ii) reacting a compound of formula V
Figure imgf000129_0001
wherein LG represents a suitable leaving group;
with an organometallic reagent of formula Vl:
X-Met Vl under suitable anhydrous conditions; or
(iii) reacting a compound of formula Va
Figure imgf000129_0002
with an organometallic reagent of formula Vl:
X-Met
Vl under suitable anhydrous conditions followed by oxidation to the carbonyl compound by an appropriate oxidation agent; or
(iv) reacting a compound of formula VII
Figure imgf000130_0001
with a compound X-H wherein the H forms part of an amino or hydroxy group, the reaction being carried out in the presence of a coupling reagent; or
(v) reacting a compound of formula VIII
Figure imgf000130_0002
wherein Hal is halogen or a leaving group
with a compound X-H wherein the H forms part of an amino or hydroxy group, the reaction being carried out in the presence of a coupling reagent.
12. Use of a compound of formula (I) in the manufacture of a medicament for preventing or treating bone conditions which are associated with increased calcium depletion or resorption or in which stimulation of bone formation and calcium fixation in the bone is desirable.
13. A combination comprising a therapeutically effective amount of a compound according to any one of claims 1 to 7 and a second drug substance selected from: calcium, a calcitonin or an analogue or derivative thereof, a steroid hormone, a partial estrogen agonist or estrogen-gestagen combination, a SERM (Selective Estrogen Receptor Modulator), a RANKL antibody, a cathepsin K inhibitor, vitamin D or an analogue thereof or PTH, a PTH fragment or a PTH derivative for simultaneous, separate or sequential treatment.
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