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Definitions

• the present invention is directed to novel compounds with multiple aromatic components capable of modulating, regulating and/or inhibiting tyrosine kinase signal transduction.
• the present invention is also directed to methods of prevention and/or treatment of disorders related to unregulated tyrosine kinase signal transduction, including but not limited to, cell growth disorders, metabolic disorders, blood vessel proliferative disorders, inflammatory disorders, neurodegenerative diseases and immune disorders.
• PTKs Protein tyrosine kinases
• RTKs receptor tyrosine kinases
• Binding sites are thereby created for intracellular signal transduction molecules and lead to the formation of complexes with a spectrum of cytoplasmic signaling molecules that facilitate the appropriate cellular response (e.g., cell division, metabolic homeostasis, and responses to the extracellular microenvironment).
• a specific growth factor i.e., a ligand
• receptor dimerization i.e., a ligand
• Binding sites are thereby created for intracellular signal transduction molecules and lead to the formation of complexes with a spectrum of cytoplasmic signaling molecules that facilitate the appropriate cellular response (e.g., cell division, metabolic homeostasis, and responses to the extracellular microenvironment).
• cytoplasmic signaling molecules e.g., cell division, metabolic homeostasis, and responses to the extracellular microenvironment.
• tyrosine phosphorylation sites function as high-affinity binding sites for SH2 (src homology) domains of signaling molecules.
• substrates which have a catalytic domain and (2) substrates which lack a catalytic domain but serve as adapters and associate with catalytically active molecules.
• substrates which have a catalytic domain and (2) substrates which lack a catalytic domain but serve as adapters and associate with catalytically active molecules.
• the specificity of the interactions between receptors or proteins and SH2 domains of their substrates is determined by the amino acid residues immediately surrounding the phosphorylated tyrosine residue. Differences in binding affinities between SH2 domains and the amino acid sequences surrounding the
• phospho tyrosine residues on particular receptors are consistent with the observed differences in their substrate phosphorylation profiles. These observations suggest that the function of each RTK is determined not only by its pattern of expression and ligand availability, but also by the array of downstream signal transduction pathways that are activated by a particular receptor. Thus, phosphorylation provides an important regulatory step which determines the selectivity of signaling pathways recruited by specific growth factor receptors, as well as differentiation factor receptors.
• the RTKs comprise a large family of transmembrane receptors with diverse biological activities.
• the intrinsic function of RTKs is activated upon ligand binding, which results in phophorylation of the receptor and multiple cellular substrates, and subsequently in a variety of cellular responses.
• At present, at least nineteen distinct RTK subfamilies have been identified.
• One RTK subfamily, designated the HER subfamily is believed to be comprised of EGFR, HER2, HER3 and HER4.
• Ligands to the HER subfamily of receptors include epithelial growth factor (EGF), TGF-a, amphiregulin, HB-EGF, betacellulin and heregulin.
• the second subfamily of RTKs designated the insulin subfamily, is comprised of the INS-R, the IGF-IR and the IR-R.
• the third RTK subfamily, the "PDGF" family includes the PDGF a and ⁇ receptors, CSFIR, c-kit and FLK-II.
• Another subfamily of RTKs, identified as the FLK family is believed to be comprised of the kinase insert domain-receptor fetal liver kinase- 1 (KDR/FLK-1), the fetal liver kinase 4 (FLK-4) and the fms-like tyrosine kinase 1 (fit- 1 ) .
• KDR/FLK-1 fetal liver kinase 4
• FLK-4 fetal liver kinase 4
• fit- 1 fms-like tyrosine kinase 1
• RTKs Two other subfamilies of RTKs have been designated as the FGF receptor family (FGFR1, FGFR2, FGFR3 and FGFR4) and the Met subfamily (c-met and Ron). Because of the similarities between the PDGF and FLK subfamilies, the two subfamilies are often considered together.
• the known RTK subfamilies are identified in Plowman et al, 1994, DN&P 7(6): 334-339, which is incorporated herein by reference.
• the non-receptor tyrosine kinases represent a collection of cellular enzymes which lack extracellular and transmembrane sequences. At present, over twenty- four individual non- receptor tyrosine kinases, comprising eleven subfamilies (Src, Frk, Btk, Csk, Abl, Zap70, Fes/Fps, Fak, Jak, Ack and LIMK) have been identified. At present, the Src subfamily of non-receptor tyrosine kinases is comprised of the largest number of PTKs, and include Src, Yes, Fyn, Lyn, Lck, Blk, Hck, Fgr and Yrk. The Src subfamily of enzymes has been linked to oncogenesis. A more detailed discussion of non-receptor tyrosine kinases is provided in Bolen, 1993, Oncogen 8: 2025-2031, which is incorporated herein by reference.
• PTKs protein tyrosine kinases
• RTKs protein tyrosine kinases
• the present invention is directed to compounds represented by Formula I capable of modulating, regulating and/or inhibiting tyrosine kinase signal transduction, and uses of the compounds and compositions incorporating the compounds for disease treatment and prevention.
• X is selected from the group consisting of NR , O, S(0) n ;
• n is 0 or an integer of from 1 to 2;
• R 1 is independently selected from the group consisting of hydrogen, alkenyl, alkoxyalkyl, CF 3 , alkyl, alkylcarbonyl, alkoxycarbonyl, aryl, heterocycloalkyl, hydroxyalkyl, and alkyl(N R 2 R 3 ), wherein R 2 and R 3 are independently selected from the group consisting of hydrogen, alkyl, alkylcarbonyl, alkoxycarbonyl, alkylsulfonyl, arylsulfonyl, haloalkylsulfonyl, and heterocyclylsulfonyl; alternatively R 2 and R 3 and may be taken together to form a 5-7 membered heterocyclic ring with N;
• R 1 is selected from the group consisting of hydrogen, halogen, Ci to C 8 alkyl, S(0) f R 4 , (CR 5 R 6 )dC(0)OR 4 , S(0) f (CR 5 R 6 )dC(0)OR 4 , (CR 5 R 6 ) d Ar, NR 4 (CR 5 R 6 ) d Ar,
• hydroxycarbonyl, hydroxycarbonylalkyl, amide, alkylamide, amidoalkyl, sulfonate and CR 5 R 6 may represent a carbocyclic or heterocyclic ring of from 5 to 6 carbons or alternatively, (CR 5 R 6 ) d and (CR 5 R 6 ) e may form a 3-7 membered carbocyclic or heterocyclic ring, wherein the ring may be optionally substituted with up to three of hydroxyl, halo, Ci-Cg alkyl, Ci-Cg hydroxyalkyl, Ci-Cg alkoxyalkyl,
• alkoxycarbonylalkyl alkoxycarbonyl, alkoxycarbonyl, hydroxycarbonyl, hydroxycarbonylalkyl, amide, alkylamide, amidoalkyl and sulfonate; a is 0 or an integer of from 1 to 3;
• d is 0 or an integer of from 1 to 5;
• e is an integer of from 1 to 4.
• R is independently selected from the group consisting of hydrogen, alkoxy, alkoxyalkoxy, alkoxyalkyl, alkyl, aryloxy, aryloxyalkyl, halo, haloalkoxy, haloalkyl, hydroxy, hydroxyalkoxy, hydroxyalkyl, (NR 2 R 3 )alkoxy, (NR 2 R 3 )alkenyl, (NR 2 R 3 )alkyl,
• R 2 andR 3 independently selected from the group consisting of hydrogen, alkyl, alkylcarbonyl, alkylsulfonyl, arylsulfonyl, haloalkylsulfonyl, and heterocyclylsulfonyl; alternatively R 2 andR 3 and may be taken together to form a 5-7 membered heterocyclic ring with N; b is 0 or an integer of from 1 to 2; Y is selected from the group consisting of
• g is 0 or an integer of from 1 to 3;
• h is 0 or an integer of from 1 to 3;
• R 1 is independently selected from the group consisting of hydrogen, alkenyl, alkoxyalkyl, CF 3 , alkyl, alkylcarbonyl, alkoxycarbonyl, aryl, heterocycloalkyl, hydroxyalkyl, and alkyl(N R 2 R 3 ), wherein R 2 and R 3 are independently selected from the group consisting of hydrogen, alkyl, alkylcarbonyl, alkoxycarbonyl, alkylsulfonyl, arylsulfonyl, haloalkylsulfonyl, and heterocyclylsulfonyl; alternatively R 2 and R 3 and may be taken together to form a 5-7 membered heterocyclic ring with N;
• R 2 is selected from the group consisting of hydrogen, alkyl, alkylcarbonyl,
• alkoxycarbonyl alkylsulfonyl, arylsulfonyl, haloalkylsulfonyl, and
• Ring A is selected from the group consisting of:
• An 8 to 10 membered bicyclic heteroaryl group which has 1-6 heteroatoms independently selected from the group consisting of O, N and S;
• R nI represents optionally 1-3 substituents independently selected from the group consisting of C1-C5 linear or branched alkyl, C 1-C5 linear or branched haloalkyl, C1-C5 alkoxy, hydroxy, amino, C1-C5 alkylamino, C1-C6 dialkylamino, halogen, cyano, and nitro;
• Z is selected from the group consisting of
• i 0 or 1 ;
• j is 0 or 1 ;
• R 7 and R 8 are independently selected from the group consisting of hydrogen and alkyl.
• Ring B is selected from the group consisting of:
• R IV represents optionally 1-3 substituents, independently selected from the group consisting of alkoxy, alkoxyalkyl, alkoxycarbonyl, alkyl, aryloxy, arylalkyl, carboxy, cyano, halo, haloalkoxy, haloalkyl, hydroxy, hydroxyalkyl, nitro, and— NR 9 R 10 ; wherein R 9 and R 10 are independently selected from the group consisting of hydrogen, alkyl, alkylcarbonyl, aryl, arylalkyl, cycloalkyl, cycloalkylalkyl, heterocyclyl, and heterocyclylalkyl.
• a compound according to Formula I including any tautomer, stereoisomer, diastereoisomeric form, polymorphic form, crystal form, a solvate, a hydrate, a metabolite, a pharmaceutically acceptable salt or prodrug, mixture of different stereoisomers, mixture of different crystal forms.
• Formula II including any tautomer, stereoisomer, diastereoisomeric form, crystal form, polymorphic form, mixture of stereoisomers, mixture of polymorphic forms, mixture of crystal forms, a solvate, a hydrate, a metabolite, a pharmaceutically acceptable salt or a prodrug.
• R 1 is selected from the group consisting of hydrogen, halogen, Ci to Cg alkyl, (CR 5 R 6 )dC(0)OR 4 , (CR 5 R 6 ) d Ar, NR 4 (CR 5 R 6 ) d Ar, (CR 5 R 6 ) d C(0)N(R 4 ) 2 , NR 4 (CR 5 R 6 ) d C(0)N(R 4 ) 2 , 0(CR 5 R 6 ) d C(0)N(R 4 ) 2 , (CR 5 R 6 ) d OR 4 , OC(0)(CR 5 R 6 ) d N(R 4 ) 2 ,
• each R 4 is independently selected from the group consisting of hydrogen, hydroxyl, Ci-Cg alkyl, aryl, Ci-Cg hydroxyalkyl, Ci- Cg alkoxyalkyl, (CR 5 R 6 )d and N(R 4 ) 2 may form a 3-7 membered heterocyclic ring, comprising of aziridine, azetidine, pyrrolidine, 5-fluoropyrrolidine, piperidine, 6- fluoropiperidine, N-methylpiperazine, morpholine, 2,6-dimethylmorpholine, thiomorpholine, and wherein said heterocyclic ring may be optionally substituted with up to three of R 5 ; wherein R 5 and R 6 are independently selected from the group consisting of hydrogen, halo, hydroxyl, Ci-Cg alkyl, Ci-Cg hydroxyalkyl, Ci-Cg alkoxyal
• hydroxycarbonylalkyl, amide, alkylamide, amidoalkyl, sulfonate and CR 5 R 6 may represent a carbocyclic or heterocyclic ring of from 5 to 6 carbons or alternatively, (CR 5 R 6 )d and (CR 5 R 6 ) e may form a 3-7 membered carbocyclic or heterocyclic ring, wherein the ring may be optionally substituted with up to three of hydroxyl, halo, Ci-Cg alkyl, Ci-Cg hydroxyalkyl, Ci-Cg alkoxyalkyl, alkoxycarbonylalkyl, alkoxycarbonyl, hydroxycarbonyl, hydroxycarbonylalkyl, amide, alkylamide, amidoalkyl and sulfonate.
• the diseases or conditions are selected from the group consisting of colorectal cancer, lung cancer, hematological cancer, renal cancer, liver cancer, breast cancer, diabetic retinopathy, macular degeneration, age-related macular degeneration, retinopathy of prematurity, ocular angiogenesis, retinal edema, retinal ischemia, diabetic macular edema, cystoid macular edema, retinal vein occlusion, branch vein occlusion, preretinal neovascularization, laser-induced choroidal neovascularization, neovascularization associated with keratoplasty, glaucoma and ocular tumors, arthritis, restenosis, hepatic cirrhosis, atherosclerosis, psoriasis, diabetes mellitus, wound healing, inflammation, neurodegenerative diseases and immune disorders.
• the diseases or conditions are selected from the group consisting of colorectal cancer, lung cancer, hematological cancer, renal cancer, liver cancer, breast
• a pharmaceutical composition comprising a therapeutic effective amount of a compound according to paragraphs 1 - 10 together with a pharmaceutically acceptable carrier which is suitable for systematic, parenteral, local or topical delivery.
• compositions of paragraph 15 which are in the form selected from the group consisting of tablets, capsules, intravenous injections, intramuscular injections, local injections, topical creams, gels and ointments, eye drops, ophthalmic solutions, ophthalmic suspensions, ophthalmic emulsions, intravitreal injections, subtenon injections, ophthalmic biodrodible implant, and non-bioeordible ophthalmic inserts or depots.
• the present invention is directed to a series of compounds with multiple aromatic components useful as protein tyrosine kinase inhibitors.
• the compounds of the present invention are useful for treating diseases related to unregulated tyrosine kinase signal transduction, for example, cancer, blood vessel proliferative disorders, fibrotic disorders, and neurodegenerative diseases.
• compounds of the present invention are useful for the treatment of colorectal cancer, lung cancer, hematological cancer, renal cancer, liver cancer, breast cancer, diabetic retinopathy, macular degeneration, age-related macular degeneration, retinopathy of prematurity, ocular angiogenesis, retinal edema, retinal ischemia, diabetic macular edema, cystoid macular edema, retinal vein occlusion, branch vein occlusion, preretinal neovascularization, laser-induced choroidal neovascularization, neovascularization associated with keratoplasty, glaucoma and ocular tumors, arthritis, restenosis, hepatic cirrhosis, atherosclerosis, psoriasis, diabetes mellitus, wound healing, inflammation, neurodegenerative diseases and immune disorders.
• the present invention is directed to a compound of Formula I:
• X is selected from the group consisting of NR 1 , O, S(0) n ; n is 0 or an integer of from 1 to 2;
• R 1 is independently selected from the group consisting of hydrogen, alkenyl, alkoxyalkyl, CF 3 , alkyl, alkylcarbonyl, alkoxycarbonyl, aryl, heterocycloalkyl, hydroxyalkyl, and alkyl(N R 2 R 3 ), wherein R 2 and R 3 are independently selected from the group consisting of hydrogen, alkyl, alkylcarbonyl, alkoxycarbonyl, alkylsulfonyl, arylsulfonyl, haloalkylsulfonyl, and heterocyclylsulfonyl; alternatively R 2 and R 3 and may be taken together to form a 5-7 membered heterocyclic ring with N; R 1 is selected from the group consisting of hydrogen, halogen, Ci to Cg alkyl, S(0) f R 4 ,
• hydroxycarbonyl, hydroxycarbonylalkyl, amide, alkylamide, amidoalkyl, sulfonate and CR 5 R 6 may represent a carbocyclic or heterocyclic ring of from 5 to 6 carbons or alternatively, (CR 5 R 6 ) d and (CR 5 R 6 ) e may form a 3-7 membered carbocyclic or heterocyclic ring, wherein the ring may be optionally substituted with up to three of hydroxyl, halo, Ci-Cg alkyl, Ci-Cg hydroxyalkyl, Ci-Cg alkoxyalkyl, alkoxycarbonylalkyl, alkoxycarbonyl, hydroxycarbonyl, hydroxycarbonylalkyl, amide, alkylamide, amidoalkyl and sulfonate; a is 0 or an integer of from 1 to 3;
• d is 0 or an integer of from 1 to 5;
• e is an integer of from 1 to 4.
• f is 0 or an integer of from 1 to 2;
• R n is independently selected from the group consisting of hydrogen, alkoxy, alkoxyalkoxy, alkoxyalkyl, alkyl, aryloxy, aryloxyalkyl, halo, haloalkoxy, haloalkyl, hydroxy, hydroxyalkoxy, hydroxyalkyl, (NR 2 R 3 )alkoxy, (NR 2 R 3 )alkenyl, (NR 2 R 3 )alkyl,
• R 2 andR 3 independently selected from the group consisting of hydrogen, alkyl, alkylcarbonyl, alkylsulfonyl, arylsulfonyl, haloalkylsulfonyl, and heterocyclylsulfonyl; alternatively R 2 andR 3 and may be taken together to form a 5-7 membered heterocyclic ring with N; b is 0 or an integer of from 1 to 2;
• Y is selected from the group consisting of
• g is 0 or an integer of from 1 to 3;
• h is 0 or an integer of from 1 to 3;
• R 1 is independently selected from the group consisting of hydrogen, alkenyl, alkoxyalkyl, CF 3 , alkyl, alkylcarbonyl, alkoxycarbonyl, aryl, heterocycloalkyl, hydroxyalkyl, and alkyl(N R 2 R 3 ), wherein R 2 and R 3 are independently selected from the group consisting of hydrogen, alkyl, alkylcarbonyl, alkoxycarbonyl, alkylsulfonyl, arylsulfonyl, haloalkylsulfonyl, and heterocyclylsulfonyl; alternatively R 2 and R 3 and may be taken together to form a 5-7 membered heterocyclic ring with N;
• R 2 is selected from the group consisting of hydrogen, alkyl, alkylcarbonyl, alkoxycarbonyl, alkylsulfonyl, arylsulfonyl, haloalkylsulfonyl, and
• Ring A is selected from the group consisting of:
• An 8 to 10 membered bicyclic heteroaryl group which has 1-6 heteroatoms independently selected from the group consisting of O, N and S;
• R in represents optionally 1-3 substituents independently selected from the group consisting of C1-C5 linear or branched alkyl, C1-C5 linear or branched haloalkyl, C1-C5 alkoxy, hydroxy, amino, C1-C5 alkylamino, C1-C6 dialkylamino, halogen, cyano, and nitro;
• Z is selected from the group consisting of
• i 0 or 1 ;
• j is 0 or 1 ;
• R 7 and R 8 are independently selected from the group consisting of hydrogen and alkyl; Rin B is selected from the group consisting
• R IV represents optionally 1-3 substituents, independently selected from the group consisting of alkoxy, alkoxyalkyl, alkoxycarbonyl, alkyl, aryloxy, arylalkyl, carboxy, cyano, halo, haloalkoxy, haloalkyl, hydroxy, hydroxyalkyl, nitro, and— NR 9 R 10 ; wherein R 9 and R 10 are independently selected from the group consisting of hydrogen, alkyl, alkylcarbonyl, aryl, arylalkyl, cycloalkyl, cycloalkylalkyl, heterocyclyl, and heterocyclylalkyl.
• reference to a compound should be construed broadly to include compounds, pharmaceutically acceptable salts, prodrugs, tautomers, stereoisomers, diastereoisomers, alternate solid forms, crystal forms, polymorphic forms, hydrates, solvates, metabolites, mixtures of stereoisomers, mixtures of crystal forms, non-covalent complexes, and combinations thereof, of a chemical entity of a depicted structure or a chemical name.
• a pharmaceutically acceptable salt is any salt of the parent compound that is suitable for administration to an animal or human.
• a pharmaceutically acceptable salt also refers to any salt which may form in vivo as a result of administration of an acid, another salt, or a prodrug which is converted into an acid or salt.
• a salt comprises one or more ionic forms of the compound, such as a conjugate acid or base, associated with one or more corresponding counter-ions. Salts can form from or incorporate one or more deprotonated acidic groups (e.g. carboxylic acids), one or more protonated basic groups (e.g. amines), or both (e.g. zwitterions).
• a “prodrug” is a compound, which when administered to the body of a subject (such as a mammal), breaks down in the subject's metabolic pathway to provide an active compound of Formula I. More specifically, a prodrug is an active or inactive "masked” compound that is modified chemically through in vivo physiological action, such as hydrolysis, metabolism and the like, into a compound of this invention following
• a prodrug is a masked carboxylic acid group.
• a masked carboxylate anion include a variety of esters, such as alkyl (for example, methyl, ethyl), cycloalkyl (for example, cyclohexyl), aralkyl (for example, benzyl, p-methoxybenzyl), and alkylcarbonyloxyalkyl (for example, pivaloyloxymethyl).
• esters such as alkyl (for example, methyl, ethyl), cycloalkyl (for example, cyclohexyl), aralkyl (for example, benzyl, p-methoxybenzyl), and alkylcarbonyloxyalkyl (for example, pivaloyloxymethyl).
• Amines have been masked as arylcarbonyloxymethyl substituted derivatives which are cleaved by esterases in vivo releasing the free drug and formaldehy
• Tautomers are isomers that are in rapid equilibrium with one another.
• tautomers may be related by transfer of a proton, hydrogen atom, or hydride ion.
• Alternate solid forms are different solid forms than those that may result from practicing the procedures described herein.
• alternate solid forms may be amorphous forms, crystal forms, polymorphs, and the mixtures thereof.
• Non-covalent complexes are complexes that may form between the compound and one or more additional chemical species that do not involve a covalent bonding interaction between the compound and the additional chemical species. They may or may not have a specific ratio between the compound and the additional chemical species. Examples might include solvates, hydrates, charge transfer complexes, and the like.
• the present invention is also directed to the use of the compounds as protein tyrosine kinase modulators and inhibitors. These compounds can be used to treat diseases related to unregulated tyrosine kinase signal transduction, for example, various cancers, blood vessel proliferative disorders, fibrotic disorders, and neurodegenerative diseases.
• compounds of the present invention are useful for the treatment and/or prevention of colorectal cancer, lung cancer, hematological cancer, renal cancer, liver cancer, breast cancer, diabetic retinopathy, macular degeneration, age-related macular degeneration, retinopathy of prematurity, ocular angiogenesis, retinal edema, retinal ischemia, diabetic macular edema, cystoid macular edema, retinal vein occlusion, branch vein occlusion, preretinal
• neovascularization laser-induced choroidal neovascularization, neovascularization associated with keratoplasty, glaucoma and ocular tumors, arthritis, restenosis, hepatic cirrhosis, atherosclerosis, psoriasis, diabetes mellitus, wound healing, inflammation, neurodegenerative diseases and immune disorders in the human being.
• the present invention is also directed to the preparation of a medicament for the treatment and prevention of diseases and conditions related with abnormal activities of tyrosine kinase receptors.
• the medicament contains a pharmaceutical acceptable composition, which comprises the therapeutic effective amount of the compounds of present invention, together with a pharmaceutical acceptable carrier.
• treat refers to the diagnosis, cure, mitigation, treatment, or prevention of disease or other undesirable conditions.
• compositions contain therapeutic effective amount of the compounds of the present invention. These compositions can be used as a medicament and administered to a mammal, such as a person, in need thereof.
• suitable dosage forms and medicaments are well known in the art, and can be readily adapted for delivery of the compounds of the present invention, such as, but not limited to, systematic, parenteral, local and topical delivery.
• the dosage forms can be tablets, capsules, intravenous injections, intramuscular injections, local injections, topical creams, gels and ointments, eye drops, ophthalmic solutions, ophthalmic suspensions, ophthalmic emulsions, intravitreal injections, subtenon injections, ophthalmic biodrodible implant, and non-bioeordible ophthalmic inserts or depots, nasal sprays and ointment, various rectal or vaginal preparations.
• Methyl 7-chlorothieno[3,2-b]pyridine-2-carboxylate (5 g, 0.022 mol) and the 4-amino-3- fluorophenol (3.3 g, 0.026 mol) were added to a round bottom flask containing cesium carbonate (14.8 g, 0.045 mol), ethyl-2-cyclohexanone carboxylate (0.73 g, 0.004 mol), and copper (I) chloride (0.22 g, 0.002 mol).
• the mixture was diluted with DMSO (250 mL) and stirred at 70 C under an atmosphere of nitrogen for 2 hours.
• Methyl 7-(4-amino-3-fluorophenoxy)thieno[3,2-b]pyridine-2-carboxylate (1.62 g, 5.1 mmol) was taken up in 55 mL of ethyl acetate followed by the dropwise addition of 2-fluoro-5- methylphenyl isocyanate (0.85 g, 5.6 mmol) in 5 mL ethyl acetate. The solution afforded a lavender solid after stirring at room temperature for overnight.
• Methyl 7-(3-fluoro-4-(3-(2-fluoro-5-methylphenyl)ureido)phenoxy)thieno[3,2-b]pyridine-2- carboxylate (1.84 g, 3.92 mmol) was taken up in 100 mL THF followed by the dropwise addition of IN sodium hydroxide (4.8 mL, 4.8 mmol). The solution was stirred at room temperature for 3 hours, at which time an additional 2.4 mL of IN sodium hydroxide was added. The solution was stirred at room temperature for overnight and the resulting mixture was diluted with 75 mL of water and acidified using IN HC1.
• the insoluble material was separated by filtration and the filter cake was suspended in ethyl acetate and stirred for several minutes before filtering.
• the filter cake was washed several times with ethyl acetate and dried under high vacuum to give 7-[3-fluoro-4-( ⁇ [(2-fluoro-5- methylphenyl)amino]carbonyl ⁇ amino)phenoxy]thieno[3,2-b]pyridine-2-carboxylic acid as an off white solid.
• Biological data for the compounds of the present invention was generated by the use of one or more of the following assays.
• DMSO concentration 0.1%.
• test agents for screening, cells were pre-incubated with test agents for 30 minutes, at a single concentration (10 .mu.M) or at concentrations ranging from 0.01 to 10.0 .mu.M followed by VEGF stimulation (5 ng/mL). Changes in fluorescence at 516 nm were measured simultaneously in all 96 wells using a cooled CCD camera. Data were generated by determining max-min fluorescence levels for unstimulated, stimulated, and drug treated samples. IC.sub.50 values for test compounds were calculated from % inhibition of VEGF stimulated responses in the absence of inhibitor. VEGFR2 Kinase Assay
• the cytoplasmic domain of the human VEGF receptor (VEGFR-2) was expressed as a Histidine-tagged fusion protein following infection of insect cells using an His engineered baculovirus. His-VEGFR-2 was purified to homogeneity, as determined by SDS-PAGE, using nickel resin chromatography. Kinase assays were performed in 96 well microtiter plates that were coated overnight with 30 .mu.g of poly-Glu-Tyr (4: 1) in 10 mM Phosphate
• mice Male Hartley guinea pigs (300-600 g) were anesthetized with isof uorane, sheared, and given a single dose of drug or the respective vehicle. The guinea pigs were dosed orally unless indicated otherwise in Table 3. Ten minutes prior to the end of drug treatment, guinea pigs were anesthetized with isofluorane, and 0.5%> Evans blue dye (EBD) in PBS (13-15 mg/kg dose of EBD) was injected intravenously. After 5 minutes, triplicate intradermal injections of 100 ng rhVEGF.sub.165 in 100 .mu.l PBS and of 100 .mu.l PBS alone were administered on the flank. After 20 minutes, each animal was euthanized with Pentosol, and the skin containing the intradermal injection sites was removed for image analysis.
• EBD Evans blue dye
• the percent inhibition data was plotted as a function of oral dose, using the " best-fi analysis within MicroSoft Excel software.
• the ID. sub.50 value was verified visually by using the plotted data (horizontal line from 50% y value, at intersection with best- fit line drop vertical line to x axis (dose).
• FITC-dextran MW 2.times.10. sup.6
• images were obtained from the flat mounts of the RPE-choroid-sclera from each eye, and the area occupied by hyperfluorescent neovessels within each laser lesion was measured using ImagePro 4 software.
• the percent inhibition data was plotted as a function of oral dose, using the " best-fi analysis within MicroSoft Excel software. The ID. sub.50 value was verified visually by using the plotted data
• test compounds were reconstituted in 100% DMSO and added to the cells to give a final DMSO concentration of 0.1%).
• test agents for screening, cells were pre-incubated with test agents for 30 minutes, at a single concentration (10 ⁇ ) or at concentrations ranging from 0.00 InM to 10 ⁇ followed by
• IC 50 values for test compounds were calculated from % inhibition of PDGF stimulated responses in the absence of inhibitor.
• TaMe II Biological Activities of Compounds of the Present Invention

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