WO2003076408A2 - Indazole derivatives that are activators of soluble guanylate cyclase - Google Patents

Indazole derivatives that are activators of soluble guanylate cyclase Download PDF

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Publication number
WO2003076408A2
WO2003076408A2 PCT/US2003/006678 US0306678W WO03076408A2 WO 2003076408 A2 WO2003076408 A2 WO 2003076408A2 US 0306678 W US0306678 W US 0306678W WO 03076408 A2 WO03076408 A2 WO 03076408A2
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group
indazol
benzyl
oxy
hydrogen
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PCT/US2003/006678
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French (fr)
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WO2003076408A3 (en
Inventor
Teodozyj Kolasa
Jorge D. Brioni
Vijaya Gracias
Masaki Nakane
Meena V. Patel
Jeffrey Rohde
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Abbott Laboratories
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Priority claimed from US10/375,842 external-priority patent/US20040048866A1/en
Application filed by Abbott Laboratories filed Critical Abbott Laboratories
Publication of WO2003076408A2 publication Critical patent/WO2003076408A2/en
Publication of WO2003076408A3 publication Critical patent/WO2003076408A3/en

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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D231/00—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings
    • C07D231/54—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings condensed with carbocyclic rings or ring systems
    • C07D231/56—Benzopyrazoles; Hydrogenated benzopyrazoles
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P9/00—Drugs for disorders of the cardiovascular system
    • 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
    • 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
    • C07D471/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00
    • C07D471/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00 in which the condensed system contains two hetero rings
    • C07D471/04—Ortho-condensed systems

Definitions

  • the present invention relates to novel indazoles which are activators of soluble guanylate cyclase, their preparation and their use.
  • Soluble guanylate cyclase catalyzes the conversion of guanosine 5'- triphosphate (GTP) to cyclic guanosine 3',5'-monophosphate (cGMP).
  • GTP guanosine 5'- triphosphate
  • cGMP cyclic guanosine 3',5'-monophosphate
  • NO nitric oxide
  • soluble guanylate cyclase produces cGMP which serves as a second messenger for a variety of extracellular signals from neurotransmitters and hormones by way of its interaction with intracellular targets including kinases and ion channels.
  • cGMP causes smooth muscle relaxation by interacting with protein kinase G (PKG).
  • sGC resulting in increased cGMP levels opens a new approach for treatment or prevention of disorders, such as cardiovascular disease, atherosclerosis, angina pectoris, diastolic dysfunction, benign prostatic hyperplasia (BPH), incontinence, sexual dysfunction, endothelial dysfunction, trombosis, diabetes, liver cirhosis, CNS disorders as cognitive disorders, Alzheimer's disease, anxiety, stress, depression, sleep disorders, migraine, cerebral ischemia, brain trauma, pain, memory and learning capabilities, associated with low levels of cGMP.
  • disorders such as cardiovascular disease, atherosclerosis, angina pectoris, diastolic dysfunction, benign prostatic hyperplasia (BPH), incontinence, sexual dysfunction, endothelial dysfunction, trombosis, diabetes, liver cirhosis, CNS disorders as cognitive disorders, Alzheimer's disease, anxiety, stress, depression, sleep disorders, migraine, cerebral ischemia, brain trauma, pain, memory and learning capabilities, associated with low levels of cGMP.
  • the present invention discloses novel indazole derivatives that increase cGMP levels.
  • the present invention discloses indazole compounds, a method for increasing cGMP levels in a mammal using these compounds, and pharmaceutical compositions containing compounds of the present invention. More particularly, the present invention is directed to compounds of formula (I) ;
  • T, X, W, and Y are independently selected from C or N; provided that at most, only two of T, X, W, and Y can be nitrogen at the same time; Z is selected from O, S or N(R 7 );
  • Ri is selected from aryl, arylalkenyl, arylalkyl, heterocycle, heterocyclealkenyl, or heterocyclealkyl;
  • R 7 is selected from hydrogen or alkyl.
  • the present invention relates to compounds of formula
  • T, X, W, and Y are independently selected from C or N; provided that at most, only two of T, X, W, and Y can be nitrogen at the same time; Z is selected from O, S or N(R 7 );
  • Ri is selected from aryl, arylalkenyl, arylalkyl, heterocycle, heterocyclealkenyl, or heterocyclealkyl;
  • R 2 and R 4 are independently absent or selected from hydrogen, alkenyl, alkoxy, alkoxycarbonyl, alkyl, alkylcarbonyl, alkylcarbonyloxy, alkylthio, alkynyl, carboxy, cyano, formyl, halogen, haloalkoxy, haloalkyl, hydroxy, hydroxyalkyl, mercapto, nitro, -NZ ⁇ Z 2 , (NZ ⁇ Z 2 )carbonyl, or (NZ ⁇ Z 2 )sulfonyl, wherein Zj and Z 2 are independently selected from hydrogen, alkyl, alkylcarbonyl, or formyl;
  • R 3 and R 5 are independently absent or selected from hydrogen, alkenyl, alkoxy, alkoxycarbonyl, alkyl, alkylcarbonyl, alkylcarbonyloxy, alkylthio, alkynyl, carboxy, cyano, formyl, halogen, haloalkoxy, haloalkyl, hydroxy, hydroxyalkyl, mercapto, nitro, -NZ ⁇ Z 2 , (NZ ⁇ Z 2 )carbonyl, or (NZ ⁇ Z 2 )sulfonyl, wherein Zi and Z 2 are independently selected from hydrogen, alkyl, alkylcarbonyl, or formyl;
  • Rg is selected from aryl, arylalkenyl, arylalkyl, heterocycle, heterocyclealkenyl, or heterocyclealkyl; and R 7 is selected from hydrogen or alkyl.
  • compounds of the present invention have formula (I) wherein T, X, W and Y are C; Z is O; Ri is selected from aryl, arylalkyl, or heterocycle; R 6 is selected from arylalkenyl, arylalkyl, heterocycle, or heterocyclealkyl; and R 2 , R 3 , R , and R5 are as defined in formula (I).
  • compounds of the present invention have formula (I) wherein T, X, W and Y are C; Z is O; Ri is heterocycle; R 6 is arylalkyl; and R 2 , R 3 , ⁇ , and R 5 are as defined in formula (I).
  • compounds of the present invention have formula (I) wherein T, X, W and Y are C; Z is O; Ri is heterocycle selected from furyl, pyridinyl, or pyrimidinyl, wherein the heterocycle is substituted with 0, 1, or 2 substituents selected from carboxy, haloalkyl, hydroxyalkyl, or (NR A R ⁇ )carbonyl; RA and R ⁇ are independently selected from hydrogen, arylhydroxyalkyl, heterocyclealkyl, hydroxyalkyl, or (NZ ⁇ Z 2 )alkyl; R 2 , R , ⁇ and R 5 are hydrogen; R 6 is phenylmethyl; and Z ⁇ and Z 2 are as defined in formula (I) wherein T, X, W and Y are C; Z is O; Ri is heterocycle selected from furyl, pyridinyl, or pyrimidinyl, wherein the heterocycle is substituted with 0, 1, or 2 substituents selected from carboxy, haloalkyl, hydroxyalky
  • compounds of the present invention have formula (I) wherein T, X, W and Y are C; Z is O; Ri is aryl; R 6 is arylalkyl; and R 2 , R , R 4 , and R 5 are as defined in formula (I).
  • compounds of the present invention have formula (I) wherein T, X, W and Y are C; Z is O; Ri is phenyl substituted with 0, 1, or 2 substituents selected from carboxy, heterocyclecarbonyl, or (NR A R B )carbonyl; RA and R B are independently selected hydrogen, aryl, arylhydroxyalkyl, cycloalkyl, cycloalkylalkyl, heterocycle, heterocyclealkyl, hydroxyalkyl, or (NZ ⁇ Z 2 )alkyl; R 2 , R 3 , R* and R 5 are hydrogen; R 6 is phenylmethyl; and Z ⁇ and Z 2 are as defined in formula (I).
  • compounds of the present invention have formula (I) wherein T, X, W and Y are C; Z is O; Ri is arylalkyl; R 6 is arylalkenyl; and R 2 , R 3 , R 4 , and R 5 are as defined in formula (I).
  • compounds of the present invention have formula (I) wherein T, X, W and Y are C; Z is O; Ri is phenylmethyl; R 2 , R 3 , R 4 and R 5 are hydrogen; and R 6 is arylalkenyl, wherein the aryl is phenyl.
  • compounds of the present invention have formula (I) wherein T, X, W and Y are C; Z is O; Ri is arylalkyl; R 6 is heterocyclealkyl; and R 2 , R 3 , R 4 , and R 5 are as defined in formula (I).
  • compounds of the present invention have formula (I) wherein T, X, W and Y are C; Z is O; Ri is phenylmethyl; R 2 , R 3 , R 4 and R 5 are hydrogen; R 6 is furylmethyl wherein the furyl is substituted with 0, 1, or 2 substituents selected from carboxy, heterocyclecarbonyl, hydroxyalkyl, or (NRAR ⁇ )carbonyl; R A and R B are independently selected from hydrogen, cycloalkyl, or (NZ ⁇ Z 2 )alkyl; Z ⁇ and Z 2 are as defined in formula (I) .
  • compounds of the present invention have formula (I) wherein T, X, and W are C; Y is N; Z is O; Ri is selected from aryl, arylalkyl or heterocycle; R 5 is absent; R 6 is selected from arylalkenyl, arylalkyl, heterocycle, or heterocyclealkyl; and R 2 , R 3 , or R 4 are as defined in formula (I).
  • compounds of the present invention have formula (I) wherein T, X, and W are C; Y is N; Z is O; Ri is heterocycle; R 5 is absent; R 6 is arylalkyl; and R 2 , R 3 , or R 4 are as defined in formula (I).
  • compounds of the present invention have formula (I) wherein T, X, and W are C; Y is N; Z is O; R ⁇ is heterocycle selected from furyl, pyridinyl or pyrimidinyl wherein the heterocycle is substituted with 0, 1 or 2 substituents selected from carboxy, haloalkyl, hydroxyalkyl or (NR A R ⁇ )carbonyl wherein R and R ⁇ are independently selected from the group consisting of hydrogen, arylhydroxyalkyl, heterocyclealkyl, hydroxyalkyl or (NZ ⁇ Z 2 )alkyl; R 2 , R 3 , and R ⁇ t are hydrogen; R 5 is absent; and R 6 is 2-fluorophenylmethyl.
  • compounds of the present invention have formula (I) wherein T, X, and W are C; Y is N; Z is O; Ri is pyridinyl substituted with nitro; R 2 , R 3 , and R are hydrogen; R 5 is absent; and Re is 2-fluorophenylmethyl.
  • the present invention relates to a method of treating disorders that are ameliorated or prevented by increasing cGMP levels in a mammal comprising administering to the mammal a therapeutically effective amount of a compound of formula (I).
  • the method provides for treatment of disorders such as sexual dysfunction, cardiovascular disease, atherosclerosis, angina pectoris, diastolic dysfunction, benign prostatic hype ⁇ lasia (BPH), incontinence, endothelial dysfunction, thrombosis, diabetes, liver cirhosis, cognitive disorders, Alzheimer's disease, anxiety, stress, depression, sleep disorders, migraine, cerebral ischemia, brain trauma, pain, memory and learning disorders.
  • the method provides treatment for male erectile dysfunction.
  • the present invention relates to a method of treating disorders that are ameliorated by increasing cGMP levels in a mammal comprising administering to the mammal a therapeutically effective amount of a compound of formula (I) in combination with a pharmaceutically acceptable carrier.
  • the method provides for treatment of disorders such as sexual dysfunction, cardiovascular disease, atherosclerosis, angina pectoris, diastolic dysfunction, benign prostatic hype ⁇ lasia (BPH), incontinence, endothelial dysfunction, trombosis, diabetes, liver cirhosis, cognitive disorders, Alzheimer's disease, anxiety, stress, depression, sleep disorders, migraine, cerebral ischemia, brain trauma, pain, memory and learning disorders.
  • the method provides treatment for male erectile dysfunction.
  • the present invention relates to a method of treating disorders that are ameliorated by increasing cGMP levels in a mammal comprising administering to the mammal a therapeutically effective amount of a compound of formula (I) in combination with a phosphodiesterase 5 inhibitor including, but not limited to, sildenafil or vardenafil.
  • the method provides for treatment of disorders such as sexual dysfunction, cardiovascular disease, atherosclerosis, angina pectoris, diastolic dysfunction, benign prostatic hype ⁇ lasia (BPH), incontinence, endothelial dysfunction, trombosis, diabetes, liver cirhosis, cognitive disorders, Alzheimer's disease, anxiety, stress, depression, sleep disorders, migraine, cerebral ischemia, brain trauma, pain, memory and learning disorders.
  • the method provides treatment for male erectile dysfunction.
  • the present invention relates to a method of treating disorders that are ameliorated by increasing cGMP levels in a mammal comprising administering to the mammal a therapeutically effective amount of a compound of formula (I) in combination with an adrenergic receptor antagonist including, but not limited to, terazosin, prazosin or tamsulosin.
  • an adrenergic receptor antagonist including, but not limited to, terazosin, prazosin or tamsulosin.
  • the method provides for treatment of disorders such as sexual dysfunction, cardiovascular disease, atherosclerosis, angina pectoris, diastolic dysfunction, benign prostatic hype ⁇ lasia (BPH), incontinence, endothelial dysfunction, trombosis, diabetes, liver cirhosis, cognitive disorders, Alzheimer's disease, anxiety, stress, depression, sleep disorders, migraine, cerebral ischemia, brain trauma, pain, memory and learning disorders.
  • disorders such as sexual dysfunction, cardiovascular disease, atherosclerosis, angina pectoris, diastolic dysfunction, benign prostatic hype ⁇ lasia (BPH), incontinence, endothelial dysfunction, trombosis, diabetes, liver cirhosis, cognitive disorders, Alzheimer's disease, anxiety, stress, depression, sleep disorders, migraine, cerebral ischemia, brain trauma, pain, memory and learning disorders.
  • the method provides treatment for male erectile dysfunction.
  • the present invention relates to a method of treating disorders that are ameliorated by increasing cGMP levels in a mammal comprising administering to the mammal a therapeutically effective amount of a compound of formula (I) in combination with a dopamine receptor agonist including, but not limited to, apomo ⁇ hine.
  • the method provides for treatment of disorders such as sexual dysfunction, cardiovascular disease, atherosclerosis, angina pectoris, diastolic dysfunction, benign prostatic hype ⁇ lasia (BPH), incontinence, endothelial dysfunction, trombosis, diabetes, liver cirhosis, cognitive disorders, Alzheimer's disease, anxiety, stress, depression, sleep disorders, migraine, cerebral ischemia, brain trauma, pain, memory and learning disorders.
  • disorders such as sexual dysfunction, cardiovascular disease, atherosclerosis, angina pectoris, diastolic dysfunction, benign prostatic hype ⁇ lasia (BPH), incontinence, endothelial dysfunction, trombosis, diabetes, liver cirhosis, cognitive disorders, Alzheimer'
  • the method provides treatment for male erectile dysfunction.
  • alkenyl refers to a straight or branched chain hydrocarbon containing from 2 to 10 carbons and containing at least one carbon-carbon double bond formed by the removal of two hydrogens.
  • Representative examples of alkenyl include, but are not limited to, ethenyl, 2-propenyl, 2-methyl-2-propenyl, 3-butenyl, 4- pentenyl, 5-hexenyl, 2-heptenyl, 2-methyl-l-heptenyl, and 3-decenyl.
  • alkoxy refers to an alkyl group, as defined herein, appended to the parent molecular moiety through an oxygen atom.
  • Representative examples of alkoxy include, but are not limited to, methoxy, ethoxy, propoxy, 2-propoxy, butoxy, tert-butoxy, pentyloxy, and hexyloxy.
  • alkoxyalkoxy refers to an alkoxy group, as defined herein, appended to the parent molecular moiety through another alkoxy group, as defined herein.
  • Representative examples of alkoxyalkoxy include, but are not limited to, tert- butoxymethoxy, 2-ethoxyethoxy, 2-methoxyethoxy, and methoxymethoxy.
  • alkoxyalkyl refers to an alkoxy group, as defined herein, appended to the parent molecular moiety through an alkyl group, as defined herein.
  • Representative examples of alkoxyalkyl include, but are not limited to, tert-butoxymethyl, 2-ethoxy ethyl, 2-methoxyethyl, and methoxymethyl.
  • alkoxycarbonyl refers to an alkoxy group, as defined herein, appended to the parent molecular moiety through a carbonyl group, as defined herein.
  • Representative examples of alkoxycarbonyl include, but are not limited to, methoxycarbonyl, ethoxycarbonyl, and tert-butoxycarbonyl.
  • alkoxycarbonylalkyl refers to an alkoxycarbonyl group, as defined herein, appended to the parent molecular moiety through an alkyl group, as defined herein.
  • alkoxycarbonylalkyl examples include, but are not limited to, 3-methoxycarbonylpropyl, 4-ethoxycarbonylbutyl, and 2-tert- butoxycarbonylethyl.
  • alkoxysulfonyl refers to an alkoxy group, as defined herein, appended appended to the parent molecular moiety through a sulfonyl group, as 03 06678 defined herein.
  • Representative examples of alkoxysulfonyl include, but are not limited to, methoxysulfonyl, ethoxysulfonyl and propoxysulfonyl.
  • alkyl refers to a straight or branched chain hydrocarbon containing from 1 to 10 carbon atoms.
  • Representative examples of alkyl include, but are not limited to, methyl, ethyl, n-propyl, iso-propyl, n-butyl, sec-butyl, iso-butyl, tert-butyl, n- pentyl, isopentyl, neopentyl, n-hexyl, 3-methylhexyl, 2,2-dimethylpentyl, 2,3- dimethylpentyl, n-heptyl, n-octyl, n-nonyl, and n-decyl.
  • alkylcarbonyl refers to an alkyl group, as defined herein, appended to the parent molecular moiety through a carbonyl group, as defined herein.
  • Representative examples of alkylcarbonyl include, but are not limited to, acetyl, 1- oxopropyl, 2,2-dimethyl-l-oxopropyl, 1-oxobutyl, and 1-oxopentyl.
  • alkylcarbonylalkyl refers to an alkylcarbonyl group, as defined herein, appended to the parent molecular moiety through an alkyl group, as defined herein.
  • Representative examples of alkylcarbonylalkyl include, but are not limited to, 2- oxopropyl, 3,3-dimethyl-2-oxopropyl, 3-oxobutyl, and 3-oxopentyl.
  • alkylcarbonyloxy refers to an alkylcarbonyl group, as defined herein, appended to the parent molecular moiety through an oxygen atom.
  • alkylcarbonyloxy include, but are not limited to, acetyloxy, ethylcarbonyloxy, and tert-butylcarbonyloxy.
  • alkylene denotes a divalent group derived from a straight or branched chain hydrocarbon of from 1 to 10 carbon atoms.
  • Representative examples of alkylene include, but are not limited to, -CH 2 -, -CH 2 CH 2 -, -CH 2 CH 2 CH 2 -, -CH 2 CH 2 CH 2 CH 2 -, and -CH 2 CH(CH 3 )CH 2 -.
  • alkylsulfinyl refers to an alkyl group, as defined herein, appended to the parent molecular moiety through a sulfinyl group, as defined herein.
  • Representative examples of alkylsulfinyl include, but are not limited to, methylsulfinyl and ethylsulfinyl.
  • alkylsulfonyl refers to an alkyl group, as defined herein, appended to the parent molecular moiety through a sulfonyl group, as defined herein.
  • Representative examples of alkylsulfonyl include, but are not limited to, methylsulfonyl and ethylsulfonyl.
  • alkylthio refers to an alkyl group, as defined herein, appended to the parent molecular moiety through a sulfur atom.
  • Representative examples of alkylthio include, but are not limited, methylsulfanyl, ethylsulfanyl, tert-butylsulfanyl, and hexylsulfanyl.
  • alkylthioalkyl refers to an alkylthio group, as defined herein, appended to the parent molecular moiety through an alkyl group, as defined herein.
  • Representative examples of alkylthioalkyl include, but are not limited, methylsulfanylmethyl and 2-(ethylsulfanyl)ethyl.
  • alkynyl refers to a straight or branched chain hydrocarbon group containing from 2 to 10 carbon atoms and containing at least one carbon-carbon triple bond. Representative examples of alkynyl include, but are not limited, to acetylenyl, 1-propynyl, 2-propynyl, 3-butynyl, 2-pentynyl, and 1-butynyl.
  • aryl refers to a phenyl group, or a bicyclic or a tricyclic fused ring system wherein one or more of the fused rings is a phenyl group.
  • Bicyclic fused ring systems are exemplified by a phenyl group fused to a cycloalkyl group, as defined herein, or another phenyl group.
  • Tricyclic fused ring systems are exemplified by a bicyclic fused ring system, as defined herein, fused to a cycloalkyl group, as defined herein, or another phenyl group.
  • Representative examples of aryl include, but are not limited to, anthracenyl, azulenyl, fluorenyl, 2,3-dihydroindenyl, indenyl, naphthyl, phenyl and tetrahydronaphthyl.
  • aryl groups of this invention are substituted with 0, 1, 2, 3, 4 or 5 substituents independently selected from alkenyl, alkoxy, alkoxyalkoxy, alkoxyalkyl, alkoxycarbonyl, alkoxycarbonylalkyl, alkoxysulfonyl, alkyl, alkylcarbonyl, alkylcarbonylalkyl, alkylcarbonyloxy, alkylsulfinyl, alkylsulfonyl, alkylthio, alkylthioalkyl, alkynyl, arylalkyl, arylcarbonyl, carboxy, carboxyalkyl, cycloalkyl, cycloalkylalkyl, cyano, cyanoalkyl, ethylenedioxy, formyl, haloalkoxy, haloalkyl, halogen, heterocyclealkyl, heterocyclecarbonyl, hydroxy, hydroxyalkyl, mercapto, methylenedioxy
  • the aryl groups of this invention may also be substituted with 1 additional aryl group or 1 additional heterocycle wherein the additional aryl group and the additional heterocycle are substituted with 0, 1, 2, 3, 4 or 5 substituents independently selected from alkenyl, alkoxy, alkoxyalkoxy, alkoxyalkyl, alkoxycarbonyl, alkoxycarbonylalkyl, alkoxysulfonyl, alkyl, alkylcarbonyl, alkylcarbonylalkyl, alkylcarbonyloxy, alkylsulfinyl, alkylsulfonyl, alkylthio, alkylthioalkyl, alkynyl, carboxy, carboxyalkyl, cyano, cyanoalkyl, ethylenedioxy, formyl, haloalkoxy, haloalkyl, halogen, hydroxy, hydroxyalkyl, mercapto, methylenedioxy, nitro, (NZ ⁇ Z 2 )
  • aryl substituted with 0, 1, 2, 3, 4 or 5 substituents include, but are not limited to, 2- carboxyphenyl, 3-carboxyphenyl, 4-carboxyphenyl, 2-( ⁇ 4-[3-(dimethylamino)propyl]-l- piperazinyl ⁇ carbonyl)phenyl, 2-( ⁇ 4-[3-(dimethylamino)propyl]-l- piperazinyl ⁇ carbonyl)phenyl, 2-( ⁇ 4-[2-(dimethylamino)ethyl]- 1 - piperazinyl ⁇ carbonyl)phenyl, 2- ⁇ [(4-hydroxycyclohexyl)amino]carbonyl ⁇ phenyl,
  • arylalkenyl as used herein, means an aryl group, as defined herein, appended to the parent molecular moiety through an alkenyl group, as defined herein.
  • Representative examples of arylalkenyl include, but are not limited to, 3-phenyl-2-propenyl,
  • arylalkyl as used herein, means an aryl group, as defined herein, appended to the parent molecular moiety through an alkyl group, as defined herein.
  • arylalkyl include, but are not limited to, benzyl, 2-phenylethyl, 3-phenylpropyl, and 2-naphth-2-ylethyl.
  • arylcarbonyl as used herein, means an aryl group, as defined herein, appended to the parent molecular moiety through a carbonyl group, as defined herein.
  • arylcarbonyl include, but are not limited to, benzoyl, 2- chlorobenzoyl, 3-methylbenzoyl, 3,4-dichlorobenzoyl, and 2,4 difluorobenzoyl.
  • arylhydroxyalkyl as used herein, means an aryl group, as defined herein, appended to the parent molecular moiety through an hydroxyalkyl group, as defined herein.
  • arylhydroxyalkyl include, but are not limited to, 2-hydroxy-2- phenylethyl, 2-hydroxy-3-phenylpropyl, and 3-hydroxy-3-phenylpropyl.
  • carbonyl refers to a -C(O)- group.
  • carboxy refers to a -CO 2 H group.
  • carboxyalkyl refers to a carboxy group, as defined herein, appended to the parent molecular moiety through an alkyl group, as defined herein.
  • Representative examples of carboxyalkyl include, but are not limited to, carboxymethyl, 2- carboxyethyl, and 3-carboxypropyl.
  • cyano refers to a -CN group.
  • cyanoalkyl refers to a cyano group, as defined herein, appended to the parent molecular moiety through an alkyl group, as defined herein.
  • Representative examples of cyanoalkyl include, but are not limited to, cyanomethyl, 2- cyanoethyl, and 3-cyanopropyl.
  • cycloalkyl as used herein, means a saturated cyclic hydrocarbon group containing from 3 to 8 carbons.
  • Examples of cycloalkyl include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, and cyclooctyl.
  • cycloalkyl groups of this invention are substituted with 0, 1, 2 or 3 substituents independently selected from alkenyl, alkoxy, alkoxyalkoxy, alkoxyalkyl, alkoxycarbonyl, alkoxycarbonylalkyl, alkoxysulfonyl, alkyl, alkylcarbonyl, alkylcarbonylalkyl, alkylcarbonyloxy, alkylsulfinyl, alkylsulfonyl, alkylthio, alkylthioalkyl, alkynyl, carboxy, carboxyalkyl, cyano, cyanoalkyl, formyl, haloalkoxy, haloalkyl, halogen, hydroxy, hydroxyalkyl, mercapto, oxo, (NZ ⁇ Z 2 )alkyl, -NR A R B , (NR A RB)carbonyl and
  • NR A R ⁇ sulfonyl.
  • Representative examples of cycloalkyl substituted with 0, 1, 2 or 3 substituents include, but are not limited to, 4-hydroxycyclohexyl and 2-hydroxycyclohexyl.
  • ethylenedioxy refers to a -0(CH2) 2 O- group wherein the oxygen atoms of the ethylenedioxy group are attached to the parent molecular moiety through one carbon atom forming a 5 membered ring or the oxygen atoms of the ethylenedioxy group are attached to the parent molecular moiety through two adjacent carbon atoms forming a six membered ring.
  • halo refers to -CI, -Br, -I or -F.
  • haloalkoxy refers to at least one halogen, as defined herein, appended to the parent molecular moiety through an alkoxy group, as defined herein. Representative examples of haloalkoxy include, but are not limited to, chloromethoxy, 2-fluoroethoxy, trifluoromethoxy, and pentafluoroethoxy.
  • haloalkyl refers to at least one halogen, as defined herein, appended to the parent molecular moiety through an alkyl group, as defined herein.
  • haloalkyl include, but are not limited to, chloromethyl, 2- fluoroethyl, trifluoromethyl, pentafluoroethyl, and 2-chloro-3-fluoropentyl.
  • heterocycle or “heterocyclic,” as used herein, refers to a monocyclic, bicyclic, or tricyclic ring system.
  • Monocyclic ring systems are exemplified by any 3- or 4- membered ring containing a heteroatom independently selected from oxygen, nitrogen and sulfur; or a 5-, 6- or 7-membered ring containing one, two or three heteroatoms wherein the heteroatoms are independently selected from nitrogen, oxygen and sulfur.
  • the 5-membered ring has from 0-2 double bonds and the 6- and 7-membered ring have from 0-3 double bonds.
  • Representative examples of monocyclic ring systems include, but are not limited to, azetidinyl, azepanyl, aziridinyl, diazepinyl, 1,3-dioxolanyl, dioxanyl, dithianyl, furyl, imidazolyl, imidazolinyl, imidazolidinyl, isothiazolyl, isothiazolmyl, isothiazolidinyl, isoxazolyl, isoxazolinyl, isoxazolidinyl, mo ⁇ holinyl, oxadiazolyl, oxadiazolinyl, oxadiazolidinyl, oxazolyl, oxazolinyl, oxazolidinyl, piperazinyl, piperidinyl, pyranyl,
  • Bicyclic ring systems are exemplified by any of the above monocyclic ring systems fused to an aryl group as defined herein, a cycloalkyl group as defined herein, or another monocyclic ring system.
  • Representative examples of bicyclic ring systems include but are not limited to, for example, benzimidazolyl, benzodioxinyl, benzothiazolyl, benzothienyl, benzotriazolyl, benzoxazolyl, benzofuranyl, benzopyranyl, benzothiopyranyl, cinnolinyl, indazolyl, indolyl, 2,3-dihydroindolyl, indolizinyl, naphthyridinyl, isobenzofuranyl, isobenzothienyl, isoindolyl, isoquinolinyl, phthalazinyl, pyranopyridinyl, quinolinyl, quinolizin
  • tricyclic ring systems include, but are not limited to, acridinyl, carbazolyl, carbolinyl, dibenzo[b,d]furanyl, dibenzo[b,d]thienyl, naphtho[2,3-b]furan, naphtho[2,3-b]thienyl, phenazinyl, phenothiazinyl, phenoxazinyl, thianthrenyl, thioxanthenyl and xanthenyl.
  • heterocycles of this invention are substituted with 0, 1, 2, or 3 substituents independently selected from alkenyl, alkoxy, alkoxyalkoxy, alkoxyalkyl, alkoxycarbonyl, alkoxycarbonylalkyl, alkoxysulfonyl, alkyl, alkylcarbonyl, alkylcarbonylalkyl, alkylcarbonyloxy, alkylsulfinyl, alkylsulfonyl, alkylthio, alkylthioalkyl, alkynyl, carboxy, carboxyalkyl, cyano, cyanoalkyl, ethylenedioxy, formyl, haloalkoxy, haloalkyl, halogen, hydroxy, hydroxyalkyl, mercapto, methylenedioxy, nitro, oxo, (NZiZ ⁇ alkyl, -NR A R B , (NRAR ⁇ )carbonyl and (NR A R ⁇ )sulfon
  • the heterocycle groups of this invention may also be substituted with 1 additional aryl group or 1 additional heterocycle wherein the additional aryl group and the additional heterocycle are substituted with 0, 1, 2, 3, 4 or 5 substituents independently selected from alkenyl, alkoxy, alkoxyalkoxy, alkoxyalkyl, alkoxycarbonyl, alkoxycarbonylalkyl, alkoxysulfonyl, alkyl, alkylcarbonyl, alkylcarbonylalkyl, alkylcarbonyloxy, alkylsulfinyl, alkylsulfonyl, alkylthio, alkylthioalkyl, alkynyl, carboxy, carboxyalkyl, cyano, cyanoalkyl, ethylenedioxy, formyl, haloalkoxy, haloalkyl, halogen, hydroxy, hydroxyalkyl, mercapto, methylenedioxy, nitro, (NZ ⁇ Z 2 )al
  • heterocycle substituted with 0, 1, 2,or 3 substituents include, but are not limited to, 5-hydroxymethyl-2-furyl, 5-carboxy-2 -furyl, 6- hydroxymethyl-2-pyridinyl, 5-( ⁇ [3-(dimethylamino)propyl]amino ⁇ carbonyl)-2-furyl, 5- ⁇ [(4-hydroxybutyl)amino]carbonyl ⁇ -2-furyl, 5-trifluoromethyl-3-pyridinyl, 3-
  • heterocyclealkenyl as used herein, means a heterocycle, as defined herein, appended to the parent molecular moiety through an alkenyl group, as defined herein.
  • Representative examples of heterocyclealkenyl include, but are not limited to, 3- pyridin-3-yl-2-propenyl, and 4-pyrimidin-2-yl-3-butenyl.
  • heterocyclealkyl as used herein, means a heterocycle, as defined herein, appended to the parent molecular moiety through an alkyl group, as defined herein.
  • Representative examples of heterocyclealkyl include, but are not limited to, pyridin-3- ylmethyl, 2-pyrimidin-2-yl ⁇ ropyl, 2-(4-mo ⁇ holinyl)ethyl, and 3-(lH-imidazol-l-yl)propyl.
  • heterocyclecarbonyl as used herein, means a heterocycle, as defined herein, appended to the parent molecular moiety through a carbonyl group, as defined herein.
  • heterocyclecarbonyl include, but are not limited to, 3- pyridinylcarbonyl, 4-mo ⁇ holinylcarbonyl, 1-piperazinylcarbonyl, and ⁇ 4-[3- (dimethylamino)propyl]-l-piperazinyl ⁇ carbonyl.
  • hydroxy refers to an -OH group.
  • hydroxyalkyl refers to at least one hydroxy group, as defined herein, appended to the parent molecular moiety through an alkyl group, as defined herein.
  • Representative examples of hydroxyalkyl include, but are not limited to, hydroxymethyl, 2-hydroxyethyl, 3-hydroxypropyl, 2-ethyl-4-hydroxyheptyl and 2,3- dihydroxypropyl.
  • mercapto refers to a -SH group.
  • methylenedioxy refers to a -OCH 2 O- group wherein the oxygen atoms of the methylenedioxy are attached to the parent molecular moiety through two adjacent carbon atoms.
  • nitro refers to a -NO 2 group.
  • -NRARB refers to two groups, RA and R ⁇ , which are appended to the parent molecular moiety through a nitrogen atom.
  • RA and R B are each independently selected from hydrogen, alkyl, alkylcarbonyl, aryl, arylalkyl, arylhydroxyalkyl, cycloalkyl, cycloalkylalkyl, formyl, heterocycle, heterocyclealkyl, hydroxyalkyl, or (NZ ⁇ Z 2 )alkyl.
  • -NRAR B include, but are not limited to, amino, methylamino, dimethylamino, (2-(dimethylamino)ethyl)amino, (3- (dimethylamino)propyl)amino, (4-hydroxybutyl)amino, (1 -(hydroxymethyl)butyl)amino, (5-hydroxy-l,5-dimethylhexyl)amino, (2-hydroxy-2-phenylethyl)amino, (2-(4- mo ⁇ holinyl)ethyl)amino, (4-hydroxycyclohexyl)amino, ((1 S)-l -hydroxy-2,3-dihydro-lH- inden-2-yl)amino, (2-(l -methyl-2-pyrrolidinyl)ethyl)amino, (3-(lH-imidazol-l - yl)propyl)amino, (4-mo ⁇ holin
  • (NR A Ri carbonyl) refers to a -NR A RB group, as defined herein, appended to the parent molecular moiety through a carbonyl group, as defined herein.
  • Representative examples of (NR A R ⁇ )carbonyl include, but are not limited to, aminocarbonyl, (methylamino)carbonyl, (dimethylamino)carbonyl, (ethylmethylamino)carbonyl, (3 -(dimethylamino)propyl)aminocarbonyl, (2- (dimethylamino)ethyl)aminocarbonyl, (5-hydroxy-l,5-dimethylhexyl)aminocarbonyl, (4- hydroxybutyl)aminocarbonyl and (l-(hydroxymethyl)butyl)ammocarbonyl.
  • (NR A R B )sulfonyl refers to a -NRARB group, as defined herein, appended to the parent molecular moiety through a sulfonyl group, as defined herein.
  • Representative examples of (NR A R B )sulfonyl include, but are not limited to, aminosulfonyl, (methylamino)sulfonyl, (dimethylamino)sulfonyl, (ethylmethylamino)sulfonyl, (3-(dimethylamino)propyl)aminosulfonyl, and (2- (dimethylamino)ethyl)aminosulfonyl.
  • -NZ ⁇ Z 2 refers to two groups, Zi and Z 2 , which are appended to the parent molecular moiety through a nitrogen atom.
  • Z ⁇ and Z 2 are each independently selected from hydrogen, alkyl, alkylcarbonyl and formyl.
  • Representative examples of -NZjZ 2 include, but are not limited to, amino, methylamino, acetylamino, and acetylmethylamino .
  • (NZ ⁇ Z 2 )alkyl refers to a -NZ ⁇ Z 2 group, as defined herein, appended to the parent molecular moiety through an alkyl group, as defined herein.
  • (NZiZ ⁇ alkyl) include, but are not limited to, 2-(amino)ethyl, 2- (dimethylamino)ethyl, 3-(amino)propyl, 3-(dimethylamino)propyl and (ethylmethylamino)carbonyl.
  • (NZ ⁇ Z 2 )carbonyl refers to a -NZ 1 Z 2 group, as defined herein, appended to the parent molecular moiety through a carbonyl group, as defined herein.
  • Representative examples of (NZ ⁇ Z 2 )carbonyl include, but are not limited to, aminocarbonyl, (methylamino)carbonyl, (dimethylamino)carbonyl and (ethylmethylamino)carbonyl .
  • (NZ ⁇ Z 2 )sulfonyl refers to a -NZ 1 Z 2 group, as defined herein, appended to the parent molecular moiety through a sulfonyl group, as defined herein.
  • Representative examples of (NZ ⁇ Z 2 )sulfonyl include, but are not limited to, aminosulfonyl, (methylamino)sulfonyl, (dimethylamino)sulfonyl and (ethylmethylamino)sulfonyl.
  • sulfmyl refers to a -S(O)- group.
  • sulfonyl refers to a -SO 2 - group.
  • sexual dysfunction refers to male sexual dysfunction and female sexual dysfunction.
  • male sexual dysfunction includes, but is not limited to, male erectile dysfunction and premature ejacualtion.
  • female sexual dysfunction includes, but is not limited to, female anorgasmia, clitoral erectile insufficiency, vaginal engorgement, dyspareunia, and vaginismus.
  • Stereoisomers may exist as stereoisomers wherein, asymmetric or chiral centers are present. These stereoisomers are “R” or “S” depending on the configuration of substituents around the chiral carbon atom.
  • R and “S” used herein are configurations as defined in IUPAC 1974 Recommendations for Section E, Fundamental Stereochemistry, Pure Appl. Chem., 1976, 45: 13-30.
  • Stereoisomers include enantiomers and diastereomers, and mixtures of enantiomers or diastereomers.
  • Individual stereoisomers of compounds of the present invention may be prepared synthetically from commercially available starting materials which contain asymmetric or chiral centers or by preparation of racemic mixtures followed by resolution well-known to those of ordinary skill in the art. These methods of resolution are exemplified by (1) attachment of a mixture of enantiomers to a chiral auxiliary, separation of the resulting mixture of diastereomers by recrystallization or chromatography and liberation of the optically pure product from the auxiliary or (2) direct separation of the mixture of optical enantiomers on chiral chromatographic columns.
  • Representative compounds of the present invention include: ⁇ 5-[(l-benzyl-lH-indazol-3-yl)oxy]-2-furyl ⁇ methanol;
  • a preferred compound of the present invention is l-benzyl-3-(2-pyridinyloxy)-lH- indazole or a pharmaceutically acceptable salt, ester, amide or prodrug thereof.
  • Boc for tert-butoxycarbonyl
  • DMF for N,N-dimethylformamide
  • DMSO for dimethylsulfoxide
  • EDCI or EDC for l-ethyl-3-[3-(dimethylamino)pro ⁇ yl]- carbodiimide hydrochloride
  • Et for ethyl
  • EtOAc for ethyl acetate
  • EtOH for ethanol
  • HObt for 1-hydroxybenzotriazole
  • MeOH for methanol
  • TEA for triethylamine
  • TFA trifluoroacetic acid
  • THF for tefrahydrofuran
  • TLC thin layer chromatography
  • Indazoles of general formula (6) wherein T, X, W, Y, Ri, R 2 , R 3 , R , R 5 , and R ⁇ are as defined in formula (I) can be prepared as described in Scheme 1.
  • Benzoic acids of general formula (1) can be treated with hydrazine as described in L. Baiocchi et al.,
  • Hydroxyindazoles of general formula (2) can be treated with compounds of general formula (3) in the presence of sodium hydroxide to provide 1 -substituted 3- hydroxyindazoles of general formula (4).
  • 1 -Substituted 3 -hydroxyindazoles of general formula (4) can be treated with compounds of general formula (5) in the presence of sodium hydroxide or potassium hydroxide to provide indazoles of general formula (6).
  • Indazoles of general formula (8) wherein R ⁇ , R 2 , R 3 , i, R5, and R 6 are as defined in formula (I), can be prepared as described in Scheme 1.
  • 1 -Substituted 3 -hydroxyindazoles of general formula (4) can be treated with a base such as sodium hydride and aryl groups or heterocycles of general formula (7), wherein 4 is selected from NO 2 , CI, Br, I, OS(O) 2 CH 3 or OS(O) 2 CF 3 , to provide indazoles of general formula (8).
  • 1-substituted 3- hydroxyindazoles of general formula (4) can be treated with a base such as potassium carbonate, Cul and aryl groups or heterocycles of general formula (7) to provide indazoles of general formula (8).
  • Indazoles of general formula (14), wherein T, X, W, Y, Ri, R 2 , R 3 , R 4 , R5, and R 6 are as defined in formula (I), can be prepared as described in Scheme 2.
  • 3-Iodoindazoles of general formula (11) can be treated with n-bultyllithium followed by treatment with tert-butyllithium as described in Welch, W. M., et al. Synthesis, (1992) 937-939 to provide the dianion which can be treated with an aminating agent such as BocN(Li)OTos, prepared as described in C. Greek, L. Bischoff, A. Girard, J. Hajicek, J-P. Genet, Bull. Soc. Chim.
  • 3-N-Bocindazoles of general formula (12) can be processed as described in Scheme 1 to provide N-Boc-indazoles of general formula (13).
  • N-Boc-indazoles of general formula (13) can be treated with trifluoroacetic acid and then treated as described in Scheme 1 to provide Indazoles of general formula (14).
  • Pyrazolo[4,3-b]pyridines of general formula (22), wherein Ri, R 3 , R 4 , R 5 , and R 6 are as defined in formula (I), can be prepared as described in Scheme 4.
  • 3-Aminopyridine-2- carboxylic acids of general formula (20) can be treated with sodium nitrite and HC1/H 2 0 followed by treatment with Na 2 SO 3 /H 2 O and then acidification with HCI to provide hydroxypyrazolo[4,3-b]pyridines of general formula (21) as described in J. Med. Chem. (1989) 32, 2128.
  • Hydroxypyrazolo[4,3-b]pyridines of general formula (21) can be processed as described in Scheme 1 to provide pyrazolo[4,3-b]pyridines of general formula (22).
  • Pyrazolo[3,4-d]pyrimidines of general formula (26), wherein R ls R 2 , R 4 , and Re are as defined in formula (I), can be prepared as described in Scheme 5.
  • 4-Aminopyrimidine-5- carboxylic acids of general formula (24) can be processed as described in Scheme 4 to provide hydroxypyrazolo[3,4-d]pyrimidines of general formula (25).
  • Hydroxypyrazolo[3,4- djpyrimidines of general formula (25) can be processed as described in Scheme 1 to provide pyrazolo[3,4-dJpyrimidines of general formula (26).
  • Pyrazolo[3,4-c]pyridines of general formula (30), wherein R ls R 2 , R 3 , R 5 , and R 6 are as defined in formula (I), can be prepared as described in Scheme 6.
  • 3-Aminoisonicotinic acids of general formula (28), can be processed as described in Scheme 4 and Scheme 1 to provide pyrazolo[3,4-c]pyridines of general formula (30).
  • Pyrazolo[3,4-b]pyridines of general formula (28), wherein R ls R 2 , R 3 , R 4 , and R 6 are as defined in formula (I), can be prepared as described in Scheme 7.
  • 2-Aminonicotinic acids of general formula (28) can be processed as described in Scheme 4 and Scheme 1 to provide pyrazolo[3,4-b]pyridines of general formula (28).
  • Pyrazolo[4,3-cjpyridines of general formula (35), Ri, R 2 , i, R 5 , and R 6 are as defined in formula (I), can be prepared as described in Scheme 8.
  • N-Oxides of general formula (32) can be treated with hydrazine and then freated with refluxing hydrochloric acid to provide N-oxides of general formula (33).
  • N-Oxides of general formula (33) can be reduced with Raney nickel as described in Aust. J. Chem., (1965) 18, 379-87 to provide hydroxypyrazolo[4,3-c]pyridines of general formula (34).
  • Hydroxypyrazolo[4,3- cjpyridines of general formula (34) can be processed as described in Scheme 1 to provide pyrazolo[4,3-cjpyridines of general formula (35).
  • Pyrazolo[4,3-b]pyridines of general formula (41), wherein Ri, R 3 , R 4 , R 5 , and R 6 are as defined in formula (I), can be prepared as described in Scheme 9.
  • 2-Chloropyridin-3- a ines of general formula (37) can be treated with methylboronic acid under Suzuki conditions as described in Tetrahedron (1998) 6311; JACS 1940, 2228 to provide aminopyridines of general formula (38).
  • Aminopyridines of general formula (38) can be treated with acetic anhydride as described in J. Med. Chem. (1980) 848 to provide acetamides of general formula (39).
  • Acetamides of general formula (39) can be freated with nitrosyl chloride to provide the nitroso compound which can be reananged in refluxing benzene to pyrazolo[4,3-b]pyridines of general formula (40) as described in J.C.S. Perkin I (1973) 2901. Pyrazolo[4,3-b]pyridines of general formula (40) can be processed as described in Scheme 2 to provide Pyrazolo[4,3-b]pyridines of general formula (41).
  • Pyrazolo[4,3-b]pyridines of general formula (42), wherein Ri, R 3 , R 4 , R 5 , and R 6 are as defined in formula (I), can be prepared as described in Scheme 9.
  • Pyrazolo[4,3- bjpyridines of general formula (40) can be processed as described in Scheme 3 to provide Pyrazolo[4,3-bjpyridines of general formula (42).
  • Pyrazolo[3,4-cjpyridines of general formula (48), wherein Ri, R 2 , R 3 , R 5 , and Re are as defined in formula (I), can be prepared as described in Scheme 10.
  • Nifropyridines of general formula (44) can be treated with iron in glacial acetic acid to provide aminopyridines of general formula (45) as described in Bull. Soc. Chim. Fr. (1992) 79.
  • Aminopyridines of general formula (45) can be treated with acetic anhydride to provide acetamides of general formula (46) as described in J. Med. Chem. 1980, 23, 848.
  • Acetamides of general formula (46) can be processed as described in Scheme 9 to provide pyrazolo[3,4-cjpyridines of general formula (47).
  • Pyrazolo[3,4-c]pyridines of general formula (47) can be processed as described in Scheme 2 to provide pyrazolo[3,4-c]pyridines of general formula (48).
  • Pyrazolo[3,4-cjpyridines of general formula (49), wherein Ri, R 2 , R 3 , R 5 , and R 6 are as defined in formula (I), can also be prepared as described in Scheme 10.
  • Pyrazolo[3,4- cjpyridines of general formula (47) can be processed as described in Scheme 3 to provide pyrazolo[3,4-c]pyridines of general formula (49).
  • 4-carboxamide can be heated at 185 °C with sulfuric acid in formamide to provide 1H- pyrazolo [3 ,4-d]pyrimidin-4-ol .
  • 1 H-Pyrazolo [3 ,4-djpyrimidin-4-ol can be treated with phosphorous oxychloride and dimethylaniline to provide 4-chloro-lH-pyrazolo[3,4- djpyrimidine.
  • 4-Chloro-lH-pyrazolo[3,4-d]pyrimidine can be treated with a transition metal catalyst such as pallladium on carbon under a hydrogen atmosphere to provide pyrazolo[3,4-d]pyrimidine as described in JACS (1956) 784.
  • Pyrazolo[3,4-d]pyrrmidine can be processed as described in Scheme 2 to provide pyrazolo[3,4-d]pyrimidines of general formula (50).
  • Pyrazolo[3,4-d]pyrimidines of general formula (51), wherein Ri and Re are as defined in formula (I) can also be prepared as described in Scheme 11.
  • Pyrazolo[3,4- d]pyrimidine can be processed as described in Scheme 3 to provide pyrazolo[3,4- d]pyrimidines of general formula (51).
  • Pyrazolo[3,4-b]pyridines of general formula (58), wherein Rj, R 2 , R 3 , R 4 , and R 6 are as defined in formula (I), can be prepared as described in Scheme 12.
  • 2-Chloro-3-nicotinic acids of general formula (54) can be treated with ethyl chloroformate and sodium borohydride followed by Swern oxidation with dimethylsulfoxide, oxalyl chloride, and triethylamine to provide aldehydes of general formula (56) as described in Chem. Pharm. Bull. (2000) 694.
  • Aldehydes of general formula (56) can be treated with hydrazine hydrate in refluxing ethanol to provide pyrazolo[3,4-b]pyridines of general formula (57) as described in Can. J. Chem. (1988) 420.
  • Pyrazolo[3,4-b]pyridines of general formula (57) can be processed as described in Scheme 2 to provide pyrazolo[3,4-b]pyridines of general formula (58).
  • Pyrazolo[3,4-b]pyridines of general formula (59), wherein R l5 R 2 , R 3 , R 4 , and R 6 are as defined in formula (I), can be prepared as described in Scheme 12.
  • Pyrazolo[3,4- b]pyridines of general formula (57) can be processed as described in Scheme 3 to provide pyrazolo[3,4-b]pyridines of general formula (59).
  • Pyrazolo[4,3-c]pyridines of general formula (66), R ls R 2 , R 4 , and R 6 are as defined in formula (I), can be prepared as described in Scheme 13.
  • 3,4-Dichloropyridine-5- carboxylic acids of general formula (61) can be processed as described in Scheme 12 to provide aldehydes of general formula (63).
  • Aldehydes of general formula (63) can be freated with hydrazine hydrate in refluxing ethanol to provide chloropyrazolo[4,3- c]pyridines of general formula (64) as described in Can. J. Chem. (1988) 420.
  • Chloropyrazolo[4,3-c]pyridines of general formula (64) can be treated with a metal transition catalyst such as palladium on carbon under a hydrogen atmosphere to provide pyrazolo[4,3-c]pyridines of general formula (65) as described in JACS (1956) 784.
  • a metal transition catalyst such as palladium on carbon under a hydrogen atmosphere
  • Pyrazolo[4,3-c]pyridines of general formula (65) can be processed as described in Scheme 2 to provide pyrazolo[4,3-c]pyridines of general formula (66).
  • Pyrazolo[4,3-c]pyridines of general formula (67), R ls R 2 , R 4 , and R ⁇ are as defined in formula (I), can be prepared as described in Scheme 13.
  • Pyrazolo[4,3-c]pyridines of general formula (65) can be processed as described in Scheme 3 to provide pyrazolo[4,3- cjpyridines of general formula (67).
  • Example 1 (5- (l-benzyl-lH-indazol-3-yl oxy]-2-furyl ⁇ methanol
  • Example 2A methyl 6- [( 1 -benzyl- 1 H-indazol-3 -vDoxy] -2-pyridinecarboxylate
  • the product from Example 1A 224 mg, 1 mmol
  • K 2 CO 3 (276 mg, 2 mmol)
  • methyl 6-chloro-2-pyridinecarboxylate (342 mg, 2 mmol)
  • Cu 25 mg
  • the mixture was allowed to cool to room temperature, concentrated under reduced pressure and the residue was partitioned between water and EtOAc.
  • the ethyl acetate layer was washed with water, brine, dried with MgSO 4 , filtered and the filtrate concentrated under reduced pressure.
  • Example 4A methyl 5- IY 1 -benzyl- 1 H-indazol-3 -vDoxy] -2-furoate
  • DMSO DMSO
  • the product from Example 1 A 224 mg, 1 mmol
  • methyl 5-nitro-2-furoate 255 mg, 1.5 mmol
  • DMSO DMSO
  • 60% oil dispersion NaH 80 mg, 2 mmol
  • the ethyl acetate layer was washed with water, brine, dried with MgSO 4 , filtered and the filtrate concentrated under reduced pressure.
  • Example 4A The product from Example 4A (140 mg, 0.4 mmol) in MeOH (15 L) was freated with IN NaOH (1 mL, 1 mmol). After stirring at ambient temperature for 2 hours, the mixture was treated with water (10 mL). The methanol was removed under reduced pressure and the aqueous solution was acidified with 10% citric acid to pH 3. The resultant solid was filtered, washed with water and dried under reduced pressure to afford 100 mg of the title compound, mp 162-165 °C; !
  • Example 4B The product from Example 4B (50 mg, 0.15 mmol) in CHCl 3 /l,4-dioxane (1:1) (5 mL) was freated with EDCI (42 mg, 0.22 mmol) and N-hydroxysuccinimide (26 mg, 0.15 mmol). After stirring at ambient temperature for lhour, the mixture was treated with 4- amino-1-butanol (133 mg, 0.15 mmol) and the reaction mixture was stirred at ambient temperature for an additional 16 hours. The reaction mixture was diluted with CHC1 3 (5 mL) and the phases separated. The organic layer was washed with water (2 mL), dried over anhydrous Na 2 SO 4 , filtered and the filtrate concentrated under reduced pressure.
  • Example 7 5-[(l-benzyl-lH-indazol-3-yl oxy1-N- l-(hvdroxymethyl ' )butyll-2-furamide
  • the product from Example 4B and 2-amino-l-pentanol were processed according to the procedure described in Example 6 to provide the title compound.
  • Example 8 S-r i-benzyl-lH-indazol-S-yDoxyl-N-fS-hvdroxy- S-dimethylhexyD- ⁇ -furamide
  • the product from Example 4B and 6-amino-2-methyl-2-heptanol were processed according to the procedure described in Example 6 to provide the title compound. !
  • Example 9 363987 5 - [ " ( 1 -benzyl- 1 H-indazol-3 -vDoxy] -N-(2-hydroxy-2-phenylethyl -2-furamide
  • the product from Example 4B and 2-amino- 1 -phenylethanol were processed according to the procedure described in Example 6 to provide the title compound.
  • Example 4B The product from Example 4B and 2-amino-l -phenylethanol were processed according to the procedure described in Example 6 to provide the title compound.
  • Example 12 1 -benzyl-3 -(2-p yrimidinyloxy)- 1 H-indazole
  • the product from Example 1 A and 2-chloropyrimidine were processed according to the procedure described in Example 11 to provide the title compound.
  • Example 13 l-benzyl-3-(r5-(trifluoromethyl -3-pyridmylloxy ⁇ -lH-indazole
  • the product from Example 1A and 3-chloro-5-trifluoromethylpyridine were processed according to the procedure described in Example 11 to provide the title compound.
  • 1H NMR (499.6 MHz, CDC1 3 ) ⁇ 7.90 (m, IH), 7.60 (m, IH), 7.28 (m, 10H), 5.55 (s, 2H); MS (ESI) m/z 370 (M+H) + .
  • Example 14 2-[fl-benzyl-lH-indazol-3-yl oxy]nicotinamide
  • the product from Example 1A 100 mg, 0.44 mmol
  • K 2 C0 3 122 mg, 2 mmol
  • 2- chloronicotinamide 140 mg, 2 mmol
  • Cu 10 mg
  • the mixture was allowed to cool to room temperature and concenfrated under reduced pressure.
  • the residue was partitioned between water and EtOAc.
  • the ethyl acetate layer was washed with water, brine, dried with MgS0 4 , filtered and the filfrate concentrated under reduced pressure.
  • Example 15 2- [(1 -benzyl- lH-indazol-3-yl)oxy1benzoic acid
  • the product from Example 1A and 2-bromobenzoic acid were processed according to the procedure described in Example 14 to provide the title compound.
  • the product was isolated by concenfrating the pyridine layer and extracting with water (2 mL).
  • the aquoeus layer was then acidified to pH 3.0 with 10% HCI and extracted with EtOAc (5 mL).
  • the EtOAc layer was dried over anhydrous Na 2 S0 4 , filtered and the filtrate concentrated under reduced pressure to afford 60 mg of the title compound. !
  • Example 17 N-r3-(4- ⁇ 2- (l-benzyl-lH-indazol-3-yl oxy]benzoyl ⁇ -l-piperazinyl ' )propyl]-N,N- dimethylamine
  • the product from Example 15 and N,N-dimethyl-N-[3-(l -piperazinyl)propyl]amine were processed according to the procedure described in Example 6 to provide the title compound. !
  • Example 18 2- j ⁇ 1 -benzyl- 1 H-indazol-3 -vDoxy] -N-f 3 -(dimethylamino propyl]benzamide
  • the product from Example 15 and N,N-dimethyl-l,3-propanediamine were processed according to the procedure described in Example 6 to provide the title compound.
  • Example 20 2-r(l-benzyl-lH-indazol-3-vnoxyl-N-r(lR.2SVl-hvdroxy-2.3-dihvdro-lH-inden-2- yllbenzamide
  • the product from Example 15 and (lR,2S)-2-amino-2,3-dihydro-lH-inden-l-ol were processed according to the procedure described in Example 6 to provide the title compound.
  • Example 22 2-[(l-benzyl-lH-mdazol-3-yl ' )oxy1-N-(2-hvdroxy-2-phenylethyl ' )benzamide
  • the product from Example 15 and 2-amino- 1 -phenylethanol were processed according to the procedure described in Example 6 to provide the title compound.
  • Example 24 2-[( 1 -benzyl- 1 H-indazol-3 -vDoxy] -N- [3 -( 1 H-imidazol- 1 -vDpropyllbenzamide The product from Example 15 and 3 -(1 H-imidazol- 1 -yl)propylamine were processed according to the procedure described in Example 6 to provide the title compound. !
  • Example 25 2-[( 1 -benzyl- 1 H-indazol-3 -yl)oxy]-N'-(4-mo ⁇ holmvDbenzohvdrazide
  • the product from Example 15 and 4-mo ⁇ holinamine were processed according to the procedure described in Example 6 to provide the title compound.
  • Example 27 3 -(benzyloxy)- 1 - [3 -phenyl-2-propenyl] - 1 H-indazole
  • cinnamyl bromide 99 mg, 0.5 mmol
  • KOH 28 mg, 0.5 mmol
  • DMSO 10 mL
  • the mixture was poured in water and exfracted with ethyl acetate.
  • the acetate layer was washed with water, 10% citric acid, brine, dried with anhydrous MgS0 4 , filtered and the filtrate concentrated under reduced pressure.
  • Example 28A ethyl 5- ⁇ [3 -(benzyloxyV 1 H-indazol- 1 -yllmethyll -2-furoate 3-Hydroxyindazole (336 mg, 1.5 mmol), ethyl 5-(chloromethyl)-2-furoate (0.32 mL, 2 mmol) and solid NaOH (80 mg, 2 mmol) in anhydrous DMSO (15 mL) were stirred at room temperature for 14 hours. The mixture was poured into icy water and exfracted with EtOAc. The extract was washed with water, brine, dried with anhydrous MgS0 4 , filtered and the filtrate concentrated under reduced pressure.
  • Example 28B 5 - ⁇ [3 -(benzyloxy)- 1 H-indazol- 1 -yl ⁇ [methv -2-furoic acid The product from Example 28 A (40 mg, 0.1 mmol) in EtOH (5 mL) was freated with IN NaOH (0.25 mL, 0.25 mmol) at room temperature. After stirring for 2 hours, the mixture was freated with water (10 mL), acidified with 10% citric acid to pH 3, exfracted with EtOAc and concenfrated under reduced pressure to provide 35 mg ( ⁇ 99%) of title compound.
  • Example 28A The product from Example 28A (113 mg, 0.3 mmol) and NaBE ; (38 mg, 1 mmol) in THF (15 mL) were freated with MeOH dropwise at 50 °C. After stirring at 50 °C for 15 minutes, the mixture was allowed to cool to room temperature and then freated with 10% Citric acid and extracted with EtOAc. The extract was washed with water, brine, dried with anhydrous MgS0 4 , filtered and the filtrate concentrated under reduced pressure.
  • Example 30 3-(benzyloxy -l-( ⁇ 5- f4-methyl-l-piperazinyDcarbonyll-2-furyl ⁇ methyl)-lH-indazole
  • HOBt (135 mg. 1 mmol
  • 1- methylpiperazine 150 mg, 1.5 mmol
  • EDCI 290 mg, 1.5 mmol
  • Example 28B The product from Example 28B and 2-pyrrolidinylmethanol were processed according to the procedure described in Example 30 to provide the title compound.
  • Example 32 5-
  • the product from Example 28B and N,N-dimethyl- 1 ,3-propanediamine were processed according to the procedure described in Example 30 to provide the title compound. !
  • Example 33 5 - ⁇ [3 -(benzyloxy)- 1 H-indazol- 1 -yllmethyl ⁇ -N-(4-hvdroxycvclohexylV2-furamide
  • the product from Example 28B and 4-aminocyclohexanol were processed according to the procedure described in Example 30 to provide the title compound. !
  • Example 34A methyl 2-chloronicotinate 2-Chloronicotinic acid (4.73 g, 30 mmol) was dissolved in methanol (100 mL) and freated with concenfrated H 2 S0 4 (2.5 mL). The mixture was refluxed for 4 hours, allowed to cool to room temperature, and concenfrated under reduced pressure. The residue was partitioned between a saturated solution of NaHC0 3 and ethyl acetate. The ethyl acetate layer was separated, washed with water, brine, dried over anhydrous MgS0 4 , filtered, and the filtrate was concenfrated under reduced pressure to provide the title compound. MS (DCI/NH 3 ) m/z 172 (M+H) + .
  • Example 34B 1 H-pyrazolo] " 3 personally4-b1pyridm-3 -ol Methyl 2-chloronicotinate (5.1 g, -30 mmol), Cu (1 g), and hydrazine hydrate were combined in pyridine (100 mL) and refluxed for 10 hours. The mixture was allowed to cool to room temperature and concenfrated under reduced pressure. The residue was filtered through a short silica gel column (CH 2 Cl 2 :MeOH 3:1) to provide the title compound. MS (DCI NH3) m/z 136 (M+H) + .
  • Example 34C l-(2-fluorobenzyl)-3-[(2-fluorobenzyl)oxy]-lH-pyrazolo[3,4-b1pyridine lH-Pyrazolo[3,4-b]pyridin-3-ol (4 g, -29 mmol) in DMSO (25 mL) was freated with solid NaOH ( 2 g, 50 mmol) and 2-fluorobenzyl chloride (6.3 mL, 35 mmol) at room temperature for 18 hours. The mixture was then poured into H 2 O and exfracted with ethyl acetate.
  • Example 34D 1 -(2-fluorobenzyl - 1 H-pyrazolo [3 ,4-b1pyridin-3 -ol l-(2-Fluorobenzyl)-3-[(2-fluorobenzyl)oxy]-lH-pyrazolo[3,4-b]pyridine (2.46 g, 7 mmol) was suspended in acetic acid (5 mL) and freated with 32% HBr in acetic acid (10 mL). The mixture was stined at room temperature for 2 hours, poured into icy water (25 mL), and freated with solid NaHC0 3 to pH 5. The mixture was filtered and the filter cake was washed with cold water and dried under reduced pressure to provide the title compound.
  • Example 34E l-(2-fluorobenzyl)-3-r(5-nifro-2-pyridinyl)oxyl-lH-pyrazolor3,4-b1pyridine l-(2-Fluorobenzyl)-lH-pyrazolo[3,4-b]pyridin-3-ol (243 mg, 1 mmol), 2-chloro-5- nifropyridine (238 mg, 1.5 mmol), anhydrous K 2 C0 3 , Cul (10 mg), and Cu (10 mg) were combined in DMF (10 mL) and refluxed for 10 hours. The mixture was poured into water and extracted with ethyl acetate.
  • Example 35 l-(2-fluorobenzyl -3-[ 3-nifro-2-pyridinyl)oxy1-lH-pyrazolo 3,4-blpyridine
  • the product from Example 34D and 2-chloro-3 -nifropyridine were processed according to the procedure described in Example 34E to provide the title compound, mp 115-117 °C. !
  • Guanylate Cyclase Assay Sf9 cells were cultured in Sf-900II medium supplemented with 10% (v/v) fetal calf serum at 28 °C to give a count of 6 x 10 5 cells/ml. The cells were then infected with a mixture of the virus stocks for the ⁇ l and ⁇ l subunits of guanylate cyclase at a multiplicity of infection of 0.1 pfu/cell. The cells were harvested 72 hours after infection and were pelleted by centrifugation.
  • the resulting cell pellets were homogenized with Polyteon homogenizer in 3 volumes of 20 mM Tris-HCl (pH 7.6) containing 1 mM EDTA, 5 mM dithiothreitol, 90 mM NaCl, 10% glycerol, and protease inhibitors mix (Roche Molecular Biochemicals). The homogenate was centrifuged at 50,000 x g for 60 minutes and the supernatant was aliquotted and stored at -80 °C.
  • Guanylate cyclase activity was measured by the formation of cyclic GMP from GTP in a total volume of 100 ⁇ l. Guanylate cyclase-expressed Sf9 cell high-speed supernatant (Sf9 high-speed sup) was used as an enzyme source for the assay.
  • the reaction mixture containing 0.1 ⁇ l enzyme of Sf9 high-speed sup, compound solution, 50 mM Tris-HCl (pH 7.6), 4 mM MgCl 2 , 0.5 mM IBMX, 15 mM creatine phosphate, 20 ⁇ g creatine phosphokinase, 0.1% BSA and 1 mM GTP were incubated at 37 °C for 15 minutes.
  • Table 1 indicates that compounds of the present invention potentiate the activation of sGC by nitric oxide resulting in increased levels of cGMP. Activation of sGC by allosteric activators or non NO-donors potentiates the effect of NO released during sexual stimulation increasing cGMP. Therefore, compounds of the present invention are useful for sexual dysfunction in mammals including male erectile dysfunction.
  • Compounds of the present invention can be used in combination with phosphodiesterase 5 inhibitors including, but not limited to, sildenafil or vardenafil as a method of treating sexual dysfunction in a mammal.
  • Compounds of the present invention can be used in combination with an adrenergic receptor antagonist including, but not limited to, terazosin, prazosin or tamsulosin as a method of treating sexual dysfunction in a mammal.
  • an adrenergic receptor antagonist including, but not limited to, terazosin, prazosin or tamsulosin as a method of treating sexual dysfunction in a mammal.
  • Compounds of the present invention can be used in combination with a dopamine agonist including, but not limited to, apomo ⁇ hine as a method of treating sexual dysfunction in a mammal.
  • Compounds of the present invention can be useful for disorders associated with low levels of cGMP such as cardiovascular disease, atherosclerosis, angina pectoris, diastolic dysfunction, benign prostatic hype ⁇ lasia (BPH), incontinence, sexual dysfunction, endothelial dysfunction, frombosis, diabetes, liver cirhosis, cognitive disorders, Alzheimer's disease, anxiety, stress, depression, sleep disorders, migraine, cerebral ischemia, brain frauma, pain, memory and learning disorders as discussed in S. Moncada, E. A.
  • pharmaceutically acceptable carrier means a non-toxic, inert solid, semi-solid or liquid filler, diluent, encapsulating material or formulation auxiliary of any type.
  • materials which can serve as pharmaceutically acceptable earners are sugars such as lactose, glucose and sucrose; starches such as corn starch and potato starch; cellulose and its derivatives such as sodium carboxymethyl cellulose, ethyl cellulose and cellulose acetate; powdered fragacanth; malt; gelatin; talc; excipients such as cocoa butter and suppository waxes; oils such as peanut oil, cottonseed oil, safflower oil, sesame oil, olive oil, corn oil and soybean oil; glycols; such a propylene glycol; esters such as ethyl oleate and ethyl laurate; agar; buffering agents such as magnesium hydroxide and aluminum hydroxide; alginic acid; pyr
  • Dosage forms for topical adminisfration of a compound of the present invention include powders, sprays, ointments and inhalants.
  • the active compound is mixed under sterile conditions with a pharmaceutically acceptable carrier and any needed preservatives, buffers or propellants which can be required.
  • Opthalmic formulations, eye ointments, powders and solutions are also contemplated as being within the scope of this invention.
  • Actual dosage levels of active ingredients in the pharmaceutical compositions of this invention can be varied so as to obtain an amount of the active compound(s) which is effective to achieve the desired therapeutic response for a particular patient, compositions, and mode of administration.
  • the selected dosage level will depend upon the activity of the particular compound, the route of administration, the severity of the condition being treated, and the condition and prior medical history of the patient being freated.
  • a therapeutically effective amount of one of the compounds of the present invention can be employed in pure form or, where such forms exist, in pharmaceutically acceptable salt, ester, amide, or prodrug form.
  • the compound can be administered as a pharmaceutical composition containing the compound of interest in combination with one or more pharmaceutically acceptable carriers.
  • therapeutically effective amount means a sufficient amount of the compound to treat disorders, at a reasonable benefit/risk ratio applicable to any medical treatment.
  • the specific therapeutically effective dose level for any particular patient will depend upon a variety of factors including the disorder being freated and the severity of the disorder; activity of the specific compound employed; the specific composition employed; the age, body weight, general health, sex and diet of the patient; the time of adminisfration, route of adminisfration, and rate of excretion of the specific compound employed; the duration of the treatment; drugs used in combination or coincidental with the specific compound employed; and like factors well known in the medical arts.
  • the total daily dose of the compounds of the present invention administered to a mammal, and particularly a human may range from about 0.003 to about 100 mg/kg/day.
  • more preferable doses can be in the range of from about 0.01 to about 10 mg/kg/day.
  • the effective daily dose can be divided into multiple doses for pu ⁇ oses of administration; consequently, single dose compositions may contain such amounts or submultiples thereof to make up the daily dose.
  • the present invention also provides pharmaceutical compositions that comprise compounds of the present invention formulated together with one or more non-toxic pharmaceutically acceptable carriers.
  • the pharmaceutical compositions can be specially formulated for oral administration in solid or liquid form, for parenteral injection or for rectal administration.
  • compositions of this invention can be administered to humans and other mammals orally, rectally, parenterally, intracisternally, infravaginally, intraperitoneally, topically (as by powders, ointments or drops), bucally or as an oral or nasal spray.
  • parenterally refers to modes of administration which include intravenous, intramuscular, infraperitoneal, infrasternal, subcutaneous and infraarticular inj ection and infusion.
  • compositions of this invention for parenteral injection comprise pharmaceutically acceptable sterile aqueous or nonaqueous solutions, dispersions, suspensions or emulsions as well as sterile powders for reconstitution into sterile injectable solutions or dispersions just prior to use.
  • suitable aqueous and nonaqueous carriers, diluents, solvents or vehicles include water, ethanol, polyols (such as glycerol, propylene glycol, polyethylene glycol and the like), vegetable oils (such as olive oil), injectable organic esters (such as ethyl oleate) and suitable mixtures thereof.
  • Proper fluidity can be maintained, for example, by the use of coating materials such as lecithin, by the maintenance of the required particle size in the case of dispersions and by the use of surfactants.
  • compositions may also contain adjuvants such as preservatives, wetting agents, emulsifying agents and dispersing agents.
  • adjuvants such as preservatives, wetting agents, emulsifying agents and dispersing agents.
  • Prevention of the action of microorganisms can be ensured by the inclusion of various antibacterial and antifungal agents, for example, paraben, chlorobutanol, phenol sorbic acid and the like. It may also be desirable to include isotonic agents such as sugars, sodium chloride and the like.
  • Prolonged abso ⁇ tion of the injectable pharmaceutical form can be brought about by the inclusion of agents which delay abso ⁇ tion such as aluminum monostearate and gelatin. In some cases, in order to prolong the effect of the drug, it is desirable to slow the abso ⁇ tion of the drug from subcutaneous or intramuscular injection.
  • Injectable depot forms are made by forming microencapsule matrices of the drug in biodegradable polymers such as polylactide-polyglycolide. Depending upon the ratio of drug to polymer and the nature of the particular polymer employed, the rate of drug release can be controlled. Examples of other biodegradable polymers include poly(orthoesters) and poly(anhydrides). Depot injectable formulations are also prepared by entrapping the drug in liposomes or microemulsions which are compatible with body tissues.
  • the injectable formulations can be sterilized, for example, by filtration through a bacterial-retaining filter or by inco ⁇ orating sterilizing agents in the form of sterile solid compositions which can be dissolved or dispersed in sterile water or other sterile injectable medium just prior to use.
  • Solid dosage forms for oral adminisfration include capsules, tablets, pills, powders and granules.
  • the active compound may be mixed with at least one inert, pharmaceutically acceptable excipient or carrier, such as sodium citrate or dicalcium phosphate and/or a) fillers or extenders such as starches, lactose, sucrose, glucose, mannitol and silicic acid; b) binders such as carboxymethylcellulose, alginates, gelatin, polyvinylpynolidone, sucrose and acacia; c) humectants such as glycerol; d) disintegrating agents such as agar-agar, calcium carbonate, potato or tapioca starch, alginic acid, certain silicates and sodium carbonate; e) solution retarding agents such as paraffin; f) abso ⁇ tion accelerators such as quaternary ammonium compounds; g) wetting agents such as cetyl alcohol and glycerol mono
  • Solid compositions of a similar type may also be employed as fillers in soft and hard-filled gelatin capsules using such excipients as lactose or milk sugar as well as high molecular weight polyethylene glycols and the like.
  • the solid dosage forms of tablets, dragees, capsules, pills and granules can be prepared with coatings and shells such as enteric coatings and other coatings well-known in the pharmaceutical formulating art. They may optionally contain opacifying agents and may also be of a composition such that they release the active ingredient(s) only, or preferentially, in a certain part of the intestinal tract, optionally, in a delayed manner.
  • Examples of embedding compositions which can be used include polymeric substances and waxes.
  • the active compounds can also be in micro-encapsulated form, if appropriate, with one or more of the above-mentioned excipients.
  • Liquid dosage forms for oral administration include pharmaceutically acceptable emulsions, solutions, suspensions, syrups and elixirs.
  • the liquid dosage forms may contain inert diluents commonly used in the art such as, for example, water or other solvents, solubilizing agents and emulsifiers such as ethyl alcohol, isopropyl alcohol, ethyl carbonate, ethyl acetate, benzyl alcohol, benzyl benzoate, propylene glycol, 1,3-butylene glycol, dimethyl formamide, oils (in particular, cottonseed, groundnut, com, germ, olive, castor and sesame oils), glycerol, tefrahydrofurfuryl alcohol, polyethylene glycols and fatty acid esters of sorbitan and mixtures thereof.
  • inert diluents commonly used in the art such as, for example, water or other solvents, solubilizing agents and emulsifiers
  • the oral compositions may also include adjuvants such as wetting agents, emulsifying and suspending agents, sweetening, flavoring and perfuming agents.
  • adjuvants such as wetting agents, emulsifying and suspending agents, sweetening, flavoring and perfuming agents.
  • Suspensions in addition to the active compounds, may contain suspending agents as, for example, ethoxylated isostearyl alcohols, polyoxyethylene sorbitol and sorbitan esters, microcrystalline cellulose, aluminum metahydroxide, bentonite, agar-agar, fragacanth and mixtures thereof.
  • suspending agents as, for example, ethoxylated isostearyl alcohols, polyoxyethylene sorbitol and sorbitan esters, microcrystalline cellulose, aluminum metahydroxide, bentonite, agar-agar, fragacanth and mixtures thereof.
  • compositions for rectal or vaginal administration are preferably suppositories which can be prepared by mixing the compounds of the present invention with suitable non- irritating excipients or carriers such as cocoa butter, polyethylene glycol or a suppository wax which are solid at room temperature but liquid at body temperature and therefore melt in the rectum or vaginal cavity and release the active compound.
  • suitable non- irritating excipients or carriers such as cocoa butter, polyethylene glycol or a suppository wax which are solid at room temperature but liquid at body temperature and therefore melt in the rectum or vaginal cavity and release the active compound.
  • Liposomes are generally derived from phospholipids or other lipid substances. Liposomes are formed by mono- or multi-lamellar hydrated liquid crystals which are dispersed in an aqueous medium. Any non-toxic, physiologically acceptable and metabolizable lipid capable of forming liposomes can be used.
  • the present compositions in liposome form can contain, in addition to a compound of the present invention, stabilizers, preservatives, excipients and the like.
  • the preferred lipids are natural and synthetic phospholipids and phosphatidyl cholines (lecithins) used separately or together. Methods to form liposomes are known in the art. See, for example, Prescott, Ed.,
  • the present invention contemplates pharmaceutically active compounds either chemically synthesized or fomied by in vivo biofransformation of a prodrug, ester, or amide to compounds of formula I.
  • the compounds of the invention can exist in unsolvated as well as solvated forms, including hydrated forms, such as hemi-hydrates.
  • solvated forms including hydrated forms, such as hemi-hydrates.
  • pharmaceutically acceptable solvents such as water and ethanol among others are equivalent to the unsolvated forms for the pu ⁇ oses of the invention.
  • pharmaceutically acceptable salt, ester, amide, and prodrug refers to carboxylate salts, amino acid addition salts, zwitterions, esters, amides, and prodrugs of compounds of formula I which are within the scope of sound medical judgement, suitable for use in contact with the tissues of humans and lower animals without undue toxicity, irritation, allergic response, and the like, are commensurate with a reasonable benefit/risk ratio, and are effective for their intended use.
  • the compounds of the present invention can be used in the form of pharmaceutically acceptable salts derived from inorganic or organic acids.
  • pharmaceutically acceptable salt means those salts which are, within the scope of sound medical judgement, suitable for use in contact with the tissues of humans and lower animals without undue toxicity, irritation, allergic response and the like and are commensurate with a reasonable benefit/risk ratio.
  • Pharmaceutically acceptable salts are well-known in the art. The salts can be prepared in situ during the final isolation and purification of the compounds of the present invention or separately by reacting a free base function with a suitable organic acid.
  • Representative acid addition salts include, but are not limited to acetate, adipate, alginate, citrate, aspartate, benzoate, benzenesulfonate, bisulfate, butyrate, camphorate, camphorsufonate, digluconate, glycerophosphate, hemisulfate, heptanoate, hexanoate, fumarate, hydrochloride, hydrobromide, hydroiodide, 2-hydroxyethansulfonate (isethionate), lactate, maleate, methanesulfonate, nicotinate, 2-naphthalenesulfonate, oxalate, pamoate, pectinate, persulfate, 3-phenylpropionate, picrate, pivalate, propionate, succinate, tartrate, thiocyanate, phosphate, glutamate, bicarbonate, p-toluenesulfonate and undecanoate.
  • the basic nitrogen-containing groups can be quatemized with such agents as lower alkyl halides such as methyl, ethyl, propyl, and butyl chlorides, bromides and iodides; dialkyl sulfates like dimethyl, diethyl, dibutyl and diamyl sulfates; long chain halides such as decyl, lauryl, myristyl and stearyl chlorides, bromides and iodides; arylalkyl halides like benzyl and phenethyl bromides and others. Water or oil-soluble or dispersible products are thereby obtained.
  • lower alkyl halides such as methyl, ethyl, propyl, and butyl chlorides, bromides and iodides
  • dialkyl sulfates like dimethyl, diethyl, dibutyl and diamyl sulfates
  • long chain halides such as decyl
  • acids which can be employed to form pharmaceutically acceptable acid addition salts include such inorganic acids as hydrochloric acid, hydrobromic acid, sulphuric acid and phosphoric acid and such organic acids as maleic acid, fumaric acid, succinic acid and citric acid.
  • Basic addition salts can be prepared in situ during the final isolation and purification of compounds of this invention by reacting a carboxylic acid-containing moiety with a suitable base such as the hydroxide, carbonate or bicarbonate of a pharmaceutically acceptable metal cation or with ammonia or an organic primary, secondary or tertiary amine.
  • a suitable base such as the hydroxide, carbonate or bicarbonate of a pharmaceutically acceptable metal cation or with ammonia or an organic primary, secondary or tertiary amine.
  • Pharmaceutically acceptable salts include, but are not limited to, cations based on alkali metals or alkaline earth metals such as lithium, sodium, potassium, calcium, magnesium and aluminum salts and the like and nontoxic quatemary ammonia and amine cations including ammonium, tetramethylammonium, tefraethylammonium, methylamine, dimethylamine, trimethylamine, triethylamine, diethylamine, ethylamine and the like.
  • Other representative organic amines useful for the fonnation of base addition salts include ethylenediamine, ethanolamine, diethanolamine, piperidine, piperazine and the like.
  • Preferred salts of the compounds of the present invention include phosphate, tris and acetate.
  • prodrug or "prodrug,”as used herein, represents those prodrugs of the compounds of the present invention which are, within the scope of sound medical judgement, suitable for use in contact with the tissues of humans and lower animals without undue toxicity, irritation, allergic response, and the like, commensurate with a reasonable benefit/risk ratio, and effective for their intended use.
  • Prodrugs of the present invention may be rapidly transformed in vivo to compounds of formula I, for example, by hydrolysis in blood.
  • esters of compounds of the present invention refers to esters of compounds of the present invention which hydrolyze in vivo and include those that break down readily in the human body to leave the parent compound or a salt thereof.
  • examples of pharmaceutically acceptable, non-toxic esters of the present invention include C ⁇ -to-C 6 alkyl esters and C 5 -to-C 7 cycloalkyl esters, although C 1 -to-C 4 alkyl esters are prefened.
  • Esters of the compounds of formula I may be prepared according to conventional methods.
  • amide refers to non-toxic amides of the present invention derived from ammonia, primary Ci-to-C ⁇ alkyl amines and secondary Ci-to-C ⁇ dialkyl amines. In the case of secondary amines, the amine may also be in the form of a 5- or 6-membered heterocycle containing one nitrogen atom. Amides derived from ammonia, C ⁇ -to-C 3 alkyl primary amides and C ⁇ -to-C 2 dialkyl secondary amides are prefened. Amides of the compounds of formula I may be prepared according to conventional methods.

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Abstract

Compounds of formula (I) are novel indazoles useful for increasing cGMP levels in a mammal.

Description

INDAZOLE DERIVATIVES THAT ARE ACTIVATORS OF
SOLUBLE GUANYLATE CYCLASE
Technical Field
The present invention relates to novel indazoles which are activators of soluble guanylate cyclase, their preparation and their use.
Background of the Invention
Soluble guanylate cyclase (sGC) catalyzes the conversion of guanosine 5'- triphosphate (GTP) to cyclic guanosine 3',5'-monophosphate (cGMP). sGC is activated by nitric oxide (NO) binding to the enzyme. In response to stimulation by NO, soluble guanylate cyclase produces cGMP which serves as a second messenger for a variety of extracellular signals from neurotransmitters and hormones by way of its interaction with intracellular targets including kinases and ion channels. cGMP causes smooth muscle relaxation by interacting with protein kinase G (PKG).
Pharmacological stimulation of sGC resulting in increased cGMP levels opens a new approach for treatment or prevention of disorders, such as cardiovascular disease, atherosclerosis, angina pectoris, diastolic dysfunction, benign prostatic hyperplasia (BPH), incontinence, sexual dysfunction, endothelial dysfunction, trombosis, diabetes, liver cirhosis, CNS disorders as cognitive disorders, Alzheimer's disease, anxiety, stress, depression, sleep disorders, migraine, cerebral ischemia, brain trauma, pain, memory and learning capabilities, associated with low levels of cGMP.
The present invention discloses novel indazole derivatives that increase cGMP levels.
SUMMARY OF THE INVENTION The present invention discloses indazole compounds, a method for increasing cGMP levels in a mammal using these compounds, and pharmaceutical compositions containing compounds of the present invention. More particularly, the present invention is directed to compounds of formula (I) ;
Figure imgf000003_0001
(I), or a pharmaceutically acceptable salt, ester, amide or prodrug thereof, wherein T, X, W, and Y are independently selected from C or N; provided that at most, only two of T, X, W, and Y can be nitrogen at the same time; Z is selected from O, S or N(R7);
Ri is selected from aryl, arylalkenyl, arylalkyl, heterocycle, heterocyclealkenyl, or heterocyclealkyl; R2 and P are independently absent or selected from hydrogen, alkenyl, alkoxy, alkoxycarbonyl, alkyl, alkylcarbonyl, alkylcarbonyloxy, alkylthio, alkynyl, carboxy, cyano, formyl, halogen, haloalkoxy, haloalkyl, hydroxy, hydroxyalkyl, mercapto, nitro, -NZιZ2, (NZιZ2)carbonyl, or (NZiZ^sulfonyl, wherein Zi and Z2 are independently selected from hydrogen, alkyl, alkylcarbonyl, or formyl; R3 and R5 are independently absent or selected from hydrogen, alkenyl, alkoxy, alkoxycarbonyl, alkyl, alkylcarbonyl, alkylcarbonyloxy, alkylthio, alkynyl, carboxy, cyano, formyl, halogen, haloalkoxy, haloalkyl, hydroxy, hydroxyalkyl, mercapto, nitro, -NZ1Z2, (NZιZ2)carbonyl, or (NZιZ2)sulfonyl, wherein Z\ and Z2 are independently selected from hydrogen, alkyl, alkylcarbonyl, or formyl; R6 is selected from aryl, arylalkenyl, arylalkyl, heterocycle, heterocyclealkenyl, or heterocyclealkyl; and
R7 is selected from hydrogen or alkyl.
DETAILED DESCRIPTION OF THE INVENTION All patents, patent applications, and literature references cited in the specification are herein incorporated by reference in their entirety. In the case of inconsistencies, the present disclosure, including definitions, will prevail.
In its principle embodiment, the present invention relates to compounds of formula
(I)
Figure imgf000004_0001
(I), or a pharmaceutically acceptable salt, ester, amide or prodrug thereof, wherein T, X, W, and Y are independently selected from C or N; provided that at most, only two of T, X, W, and Y can be nitrogen at the same time; Z is selected from O, S or N(R7);
Ri is selected from aryl, arylalkenyl, arylalkyl, heterocycle, heterocyclealkenyl, or heterocyclealkyl;
R2 and R4 are independently absent or selected from hydrogen, alkenyl, alkoxy, alkoxycarbonyl, alkyl, alkylcarbonyl, alkylcarbonyloxy, alkylthio, alkynyl, carboxy, cyano, formyl, halogen, haloalkoxy, haloalkyl, hydroxy, hydroxyalkyl, mercapto, nitro, -NZιZ2, (NZιZ2)carbonyl, or (NZιZ2)sulfonyl, wherein Zj and Z2 are independently selected from hydrogen, alkyl, alkylcarbonyl, or formyl;
R3 and R5 are independently absent or selected from hydrogen, alkenyl, alkoxy, alkoxycarbonyl, alkyl, alkylcarbonyl, alkylcarbonyloxy, alkylthio, alkynyl, carboxy, cyano, formyl, halogen, haloalkoxy, haloalkyl, hydroxy, hydroxyalkyl, mercapto, nitro, -NZιZ2, (NZιZ2)carbonyl, or (NZιZ2)sulfonyl, wherein Zi and Z2 are independently selected from hydrogen, alkyl, alkylcarbonyl, or formyl;
Rg is selected from aryl, arylalkenyl, arylalkyl, heterocycle, heterocyclealkenyl, or heterocyclealkyl; and R7 is selected from hydrogen or alkyl.
In another embodiment, compounds of the present invention have formula (I) wherein T, X, W and Y are C; Z is O; Ri is selected from aryl, arylalkyl, or heterocycle; R6 is selected from arylalkenyl, arylalkyl, heterocycle, or heterocyclealkyl; and R2, R3, R , and R5 are as defined in formula (I).
In another embodiment, compounds of the present invention have formula (I) wherein T, X, W and Y are C; Z is O; Ri is heterocycle; R6 is arylalkyl; and R2, R3, Ε , and R5 are as defined in formula (I). In another embodiment, compounds of the present invention have formula (I) wherein T, X, W and Y are C; Z is O; Ri is heterocycle selected from furyl, pyridinyl, or pyrimidinyl, wherein the heterocycle is substituted with 0, 1, or 2 substituents selected from carboxy, haloalkyl, hydroxyalkyl, or (NRARβ)carbonyl; RA and Rβ are independently selected from hydrogen, arylhydroxyalkyl, heterocyclealkyl, hydroxyalkyl, or (NZιZ2)alkyl; R2, R , ^ and R5 are hydrogen; R6 is phenylmethyl; and Z\ and Z2 are as defined in formula
(I)-
In another embodiment, compounds of the present invention have formula (I) wherein T, X, W and Y are C; Z is O; Ri is aryl; R6 is arylalkyl; and R2, R , R4, and R5 are as defined in formula (I). In another embodiment, compounds of the present invention have formula (I) wherein T, X, W and Y are C; Z is O; Ri is phenyl substituted with 0, 1, or 2 substituents selected from carboxy, heterocyclecarbonyl, or (NRARB)carbonyl; RA and RB are independently selected hydrogen, aryl, arylhydroxyalkyl, cycloalkyl, cycloalkylalkyl, heterocycle, heterocyclealkyl, hydroxyalkyl, or (NZιZ2)alkyl; R2, R3, R* and R5 are hydrogen; R6 is phenylmethyl; and Z\ and Z2 are as defined in formula (I).
In another embodiment, compounds of the present invention have formula (I) wherein T, X, W and Y are C; Z is O; Ri is arylalkyl; R6 is arylalkenyl; and R2, R3, R4, and R5 are as defined in formula (I).
In another embodiment, compounds of the present invention have formula (I) wherein T, X, W and Y are C; Z is O; Ri is phenylmethyl; R2, R3, R4 and R5 are hydrogen; and R6 is arylalkenyl, wherein the aryl is phenyl.
In another embodiment, compounds of the present invention have formula (I) wherein T, X, W and Y are C; Z is O; Ri is arylalkyl; R6 is heterocyclealkyl; and R2, R3, R4, and R5 are as defined in formula (I). In another embodiment, compounds of the present invention have formula (I) wherein T, X, W and Y are C; Z is O; Ri is phenylmethyl; R2, R3, R4 and R5 are hydrogen; R6 is furylmethyl wherein the furyl is substituted with 0, 1, or 2 substituents selected from carboxy, heterocyclecarbonyl, hydroxyalkyl, or (NRARβ)carbonyl; RA and RB are independently selected from hydrogen, cycloalkyl, or (NZιZ2)alkyl; Z\ and Z2 are as defined in formula (I) .
In another embodiment, compounds of the present invention have formula (I) wherein T, X, and W are C; Y is N; Z is O; Ri is selected from aryl, arylalkyl or heterocycle; R5 is absent; R6 is selected from arylalkenyl, arylalkyl, heterocycle, or heterocyclealkyl; and R2, R3, or R4 are as defined in formula (I).
In another embodiment, compounds of the present invention have formula (I) wherein T, X, and W are C; Y is N; Z is O; Ri is heterocycle; R5 is absent; R6 is arylalkyl; and R2, R3, or R4 are as defined in formula (I). In another embodiment, compounds of the present invention have formula (I) wherein T, X, and W are C; Y is N; Z is O; R\ is heterocycle selected from furyl, pyridinyl or pyrimidinyl wherein the heterocycle is substituted with 0, 1 or 2 substituents selected from carboxy, haloalkyl, hydroxyalkyl or (NRARβ)carbonyl wherein R and Rβ are independently selected from the group consisting of hydrogen, arylhydroxyalkyl, heterocyclealkyl, hydroxyalkyl or (NZιZ2)alkyl; R2, R3, and R^t are hydrogen; R5 is absent; and R6 is 2-fluorophenylmethyl.
In another embodiment, compounds of the present invention have formula (I) wherein T, X, and W are C; Y is N; Z is O; Ri is pyridinyl substituted with nitro; R2, R3, and R are hydrogen; R5 is absent; and Re is 2-fluorophenylmethyl.
In another embodiment, the present invention relates to a method of treating disorders that are ameliorated or prevented by increasing cGMP levels in a mammal comprising administering to the mammal a therapeutically effective amount of a compound of formula (I). The method provides for treatment of disorders such as sexual dysfunction, cardiovascular disease, atherosclerosis, angina pectoris, diastolic dysfunction, benign prostatic hypeφlasia (BPH), incontinence, endothelial dysfunction, thrombosis, diabetes, liver cirhosis, cognitive disorders, Alzheimer's disease, anxiety, stress, depression, sleep disorders, migraine, cerebral ischemia, brain trauma, pain, memory and learning disorders. In particular, the method provides treatment for male erectile dysfunction. In another embodiment, the present invention relates to a method of treating disorders that are ameliorated by increasing cGMP levels in a mammal comprising administering to the mammal a therapeutically effective amount of a compound of formula (I) in combination with a pharmaceutically acceptable carrier. The method provides for treatment of disorders such as sexual dysfunction, cardiovascular disease, atherosclerosis, angina pectoris, diastolic dysfunction, benign prostatic hypeφlasia (BPH), incontinence, endothelial dysfunction, trombosis, diabetes, liver cirhosis, cognitive disorders, Alzheimer's disease, anxiety, stress, depression, sleep disorders, migraine, cerebral ischemia, brain trauma, pain, memory and learning disorders. In particular, the method provides treatment for male erectile dysfunction.
In another embodiment, the present invention relates to a method of treating disorders that are ameliorated by increasing cGMP levels in a mammal comprising administering to the mammal a therapeutically effective amount of a compound of formula (I) in combination with a phosphodiesterase 5 inhibitor including, but not limited to, sildenafil or vardenafil. The method provides for treatment of disorders such as sexual dysfunction, cardiovascular disease, atherosclerosis, angina pectoris, diastolic dysfunction, benign prostatic hypeφlasia (BPH), incontinence, endothelial dysfunction, trombosis, diabetes, liver cirhosis, cognitive disorders, Alzheimer's disease, anxiety, stress, depression, sleep disorders, migraine, cerebral ischemia, brain trauma, pain, memory and learning disorders. In particular, the method provides treatment for male erectile dysfunction.
In another embodiment, the present invention relates to a method of treating disorders that are ameliorated by increasing cGMP levels in a mammal comprising administering to the mammal a therapeutically effective amount of a compound of formula (I) in combination with an adrenergic receptor antagonist including, but not limited to, terazosin, prazosin or tamsulosin. The method provides for treatment of disorders such as sexual dysfunction, cardiovascular disease, atherosclerosis, angina pectoris, diastolic dysfunction, benign prostatic hypeφlasia (BPH), incontinence, endothelial dysfunction, trombosis, diabetes, liver cirhosis, cognitive disorders, Alzheimer's disease, anxiety, stress, depression, sleep disorders, migraine, cerebral ischemia, brain trauma, pain, memory and learning disorders. In particular, the method provides treatment for male erectile dysfunction.
In another embodiment, the present invention relates to a method of treating disorders that are ameliorated by increasing cGMP levels in a mammal comprising administering to the mammal a therapeutically effective amount of a compound of formula (I) in combination with a dopamine receptor agonist including, but not limited to, apomoφhine. The method provides for treatment of disorders such as sexual dysfunction, cardiovascular disease, atherosclerosis, angina pectoris, diastolic dysfunction, benign prostatic hypeφlasia (BPH), incontinence, endothelial dysfunction, trombosis, diabetes, liver cirhosis, cognitive disorders, Alzheimer's disease, anxiety, stress, depression, sleep disorders, migraine, cerebral ischemia, brain trauma, pain, memory and learning disorders.
In particular, the method provides treatment for male erectile dysfunction. T U 03/06678
Definitions of the Present Invention As used throughout this specification and the appended claims, the following terms have the following meanings:
The term "alkenyl," as used herein, refers to a straight or branched chain hydrocarbon containing from 2 to 10 carbons and containing at least one carbon-carbon double bond formed by the removal of two hydrogens. Representative examples of alkenyl include, but are not limited to, ethenyl, 2-propenyl, 2-methyl-2-propenyl, 3-butenyl, 4- pentenyl, 5-hexenyl, 2-heptenyl, 2-methyl-l-heptenyl, and 3-decenyl.
The term "alkoxy," as used herein, refers to an alkyl group, as defined herein, appended to the parent molecular moiety through an oxygen atom. Representative examples of alkoxy include, but are not limited to, methoxy, ethoxy, propoxy, 2-propoxy, butoxy, tert-butoxy, pentyloxy, and hexyloxy.
The term "alkoxyalkoxy," as used herein, refers to an alkoxy group, as defined herein, appended to the parent molecular moiety through another alkoxy group, as defined herein. Representative examples of alkoxyalkoxy include, but are not limited to, tert- butoxymethoxy, 2-ethoxyethoxy, 2-methoxyethoxy, and methoxymethoxy.
The term "alkoxyalkyl," as used herein, refers to an alkoxy group, as defined herein, appended to the parent molecular moiety through an alkyl group, as defined herein. Representative examples of alkoxyalkyl include, but are not limited to, tert-butoxymethyl, 2-ethoxy ethyl, 2-methoxyethyl, and methoxymethyl.
The term "alkoxycarbonyl," as used herein, refers to an alkoxy group, as defined herein, appended to the parent molecular moiety through a carbonyl group, as defined herein. Representative examples of alkoxycarbonyl include, but are not limited to, methoxycarbonyl, ethoxycarbonyl, and tert-butoxycarbonyl. The term "alkoxycarbonylalkyl," as used herein, refers to an alkoxycarbonyl group, as defined herein, appended to the parent molecular moiety through an alkyl group, as defined herein. Representative examples of alkoxycarbonylalkyl include, but are not limited to, 3-methoxycarbonylpropyl, 4-ethoxycarbonylbutyl, and 2-tert- butoxycarbonylethyl. The term "alkoxysulfonyl," as used herein, refers to an alkoxy group, as defined herein, appended appended to the parent molecular moiety through a sulfonyl group, as 03 06678 defined herein. Representative examples of alkoxysulfonyl include, but are not limited to, methoxysulfonyl, ethoxysulfonyl and propoxysulfonyl.
The term "alkyl," as used herein, refers to a straight or branched chain hydrocarbon containing from 1 to 10 carbon atoms. Representative examples of alkyl include, but are not limited to, methyl, ethyl, n-propyl, iso-propyl, n-butyl, sec-butyl, iso-butyl, tert-butyl, n- pentyl, isopentyl, neopentyl, n-hexyl, 3-methylhexyl, 2,2-dimethylpentyl, 2,3- dimethylpentyl, n-heptyl, n-octyl, n-nonyl, and n-decyl.
The term "alkylcarbonyl," as used herein, refers to an alkyl group, as defined herein, appended to the parent molecular moiety through a carbonyl group, as defined herein. Representative examples of alkylcarbonyl include, but are not limited to, acetyl, 1- oxopropyl, 2,2-dimethyl-l-oxopropyl, 1-oxobutyl, and 1-oxopentyl.
The term "alkylcarbonylalkyl," as used herein, refers to an alkylcarbonyl group, as defined herein, appended to the parent molecular moiety through an alkyl group, as defined herein. Representative examples of alkylcarbonylalkyl include, but are not limited to, 2- oxopropyl, 3,3-dimethyl-2-oxopropyl, 3-oxobutyl, and 3-oxopentyl. The term "alkylcarbonyloxy," as used herein, refers to an alkylcarbonyl group, as defined herein, appended to the parent molecular moiety through an oxygen atom. Representative examples of alkylcarbonyloxy include, but are not limited to, acetyloxy, ethylcarbonyloxy, and tert-butylcarbonyloxy.
The term "alkylene," denotes a divalent group derived from a straight or branched chain hydrocarbon of from 1 to 10 carbon atoms. Representative examples of alkylene include, but are not limited to, -CH2-, -CH2CH2-, -CH2CH2CH2-, -CH2CH2CH2CH2-, and -CH2CH(CH3)CH2-.
The term "alkylsulfinyl," as used herein, refers to an alkyl group, as defined herein, appended to the parent molecular moiety through a sulfinyl group, as defined herein. Representative examples of alkylsulfinyl include, but are not limited to, methylsulfinyl and ethylsulfinyl.
The term "alkylsulfonyl," as used herein, refers to an alkyl group, as defined herein, appended to the parent molecular moiety through a sulfonyl group, as defined herein. Representative examples of alkylsulfonyl include, but are not limited to, methylsulfonyl and ethylsulfonyl.
The term "alkylthio," as used herein, refers to an alkyl group, as defined herein, appended to the parent molecular moiety through a sulfur atom. Representative examples of alkylthio include, but are not limited, methylsulfanyl, ethylsulfanyl, tert-butylsulfanyl, and hexylsulfanyl.
The term "alkylthioalkyl," as used herein, refers to an alkylthio group, as defined herein, appended to the parent molecular moiety through an alkyl group, as defined herein. Representative examples of alkylthioalkyl include, but are not limited, methylsulfanylmethyl and 2-(ethylsulfanyl)ethyl.
The term "alkynyl," as used herein, refers to a straight or branched chain hydrocarbon group containing from 2 to 10 carbon atoms and containing at least one carbon-carbon triple bond. Representative examples of alkynyl include, but are not limited, to acetylenyl, 1-propynyl, 2-propynyl, 3-butynyl, 2-pentynyl, and 1-butynyl. The term "aryl," as used herein, refers to a phenyl group, or a bicyclic or a tricyclic fused ring system wherein one or more of the fused rings is a phenyl group. Bicyclic fused ring systems are exemplified by a phenyl group fused to a cycloalkyl group, as defined herein, or another phenyl group. Tricyclic fused ring systems are exemplified by a bicyclic fused ring system, as defined herein, fused to a cycloalkyl group, as defined herein, or another phenyl group. Representative examples of aryl include, but are not limited to, anthracenyl, azulenyl, fluorenyl, 2,3-dihydroindenyl, indenyl, naphthyl, phenyl and tetrahydronaphthyl.
The aryl groups of this invention are substituted with 0, 1, 2, 3, 4 or 5 substituents independently selected from alkenyl, alkoxy, alkoxyalkoxy, alkoxyalkyl, alkoxycarbonyl, alkoxycarbonylalkyl, alkoxysulfonyl, alkyl, alkylcarbonyl, alkylcarbonylalkyl, alkylcarbonyloxy, alkylsulfinyl, alkylsulfonyl, alkylthio, alkylthioalkyl, alkynyl, arylalkyl, arylcarbonyl, carboxy, carboxyalkyl, cycloalkyl, cycloalkylalkyl, cyano, cyanoalkyl, ethylenedioxy, formyl, haloalkoxy, haloalkyl, halogen, heterocyclealkyl, heterocyclecarbonyl, hydroxy, hydroxyalkyl, mercapto, methylenedioxy, nitro, (NZιZ2)alkyl, -NRARB, (NRARB)carbonyl and (NRARB)sulfonyl. The aryl groups of this invention may also be substituted with 1 additional aryl group or 1 additional heterocycle wherein the additional aryl group and the additional heterocycle are substituted with 0, 1, 2, 3, 4 or 5 substituents independently selected from alkenyl, alkoxy, alkoxyalkoxy, alkoxyalkyl, alkoxycarbonyl, alkoxycarbonylalkyl, alkoxysulfonyl, alkyl, alkylcarbonyl, alkylcarbonylalkyl, alkylcarbonyloxy, alkylsulfinyl, alkylsulfonyl, alkylthio, alkylthioalkyl, alkynyl, carboxy, carboxyalkyl, cyano, cyanoalkyl, ethylenedioxy, formyl, haloalkoxy, haloalkyl, halogen, hydroxy, hydroxyalkyl, mercapto, methylenedioxy, nitro, (NZιZ2)alkyl, -NRARB, (NRARβ)carbonyl and (NRARB)sulfonyl. Representative examples of aryl substituted with 0, 1, 2, 3, 4 or 5 substituents include, but are not limited to, 2- carboxyphenyl, 3-carboxyphenyl, 4-carboxyphenyl, 2-({4-[3-(dimethylamino)propyl]-l- piperazinyl}carbonyl)phenyl, 2-({4-[3-(dimethylamino)propyl]-l- piperazinyl} carbonyl)phenyl, 2-( {4-[2-(dimethylamino)ethyl]- 1 - piperazinyl}carbonyl)phenyl, 2-{[(4-hydroxycyclohexyl)amino]carbonyl}phenyl,
2-( { [( 1 R,2S)- 1 -hydroxy-2,3-dihydro- 1 H-inden-2-yl]amino} carbonyl)phenyl, 2-( { [ 1 -
(hydroxymethyl)butyl]amino}carbonyl)phenyl, 2-{[(2-hydroxy-2- phenylethyl)amino]carbonyl}phenyl, ({[2-(l-methyl-2- pyrrolidinyl)ethyl]amino } carbonyl)phenyl, 2-({[3-(l H-imidazol- 1 - yl)propyl]amino}carbonyl)phenyl, 2-[(4-moφholinylamino)carbonyl]phenyl,
2- [( { [( 1 S ,2R)-2-hydroxycyclohexyl]methyl } amino)carbonyl]phenyl, and (1S)-1 -hydroxy-
2,3-dihydro-lH-inden-2-yl.
The term "arylalkenyl" as used herein, means an aryl group, as defined herein, appended to the parent molecular moiety through an alkenyl group, as defined herein. Representative examples of arylalkenyl include, but are not limited to, 3-phenyl-2-propenyl,
2-phenylvinyl, and 4-phenyl-3-butenyl.
The term "arylalkyl" as used herein, means an aryl group, as defined herein, appended to the parent molecular moiety through an alkyl group, as defined herein.
Representative examples of arylalkyl include, but are not limited to, benzyl, 2-phenylethyl, 3-phenylpropyl, and 2-naphth-2-ylethyl.
The term "arylcarbonyl" as used herein, means an aryl group, as defined herein, appended to the parent molecular moiety through a carbonyl group, as defined herein.
Representative examples of arylcarbonyl include, but are not limited to, benzoyl, 2- chlorobenzoyl, 3-methylbenzoyl, 3,4-dichlorobenzoyl, and 2,4 difluorobenzoyl. The term "arylhydroxyalkyl" as used herein, means an aryl group, as defined herein, appended to the parent molecular moiety through an hydroxyalkyl group, as defined herein.
Representative examples of arylhydroxyalkyl include, but are not limited to, 2-hydroxy-2- phenylethyl, 2-hydroxy-3-phenylpropyl, and 3-hydroxy-3-phenylpropyl.
The term "carbonyl," as used herein, refers to a -C(O)- group. The term "carboxy," as used herein, refers to a -CO2H group.
The term "carboxyalkyl," as used herein, refers to a carboxy group, as defined herein, appended to the parent molecular moiety through an alkyl group, as defined herein. Representative examples of carboxyalkyl include, but are not limited to, carboxymethyl, 2- carboxyethyl, and 3-carboxypropyl.
The term "cyano," as used herein, refers to a -CN group.
The term "cyanoalkyl," as used herein, refers to a cyano group, as defined herein, appended to the parent molecular moiety through an alkyl group, as defined herein. Representative examples of cyanoalkyl include, but are not limited to, cyanomethyl, 2- cyanoethyl, and 3-cyanopropyl.
The term "cycloalkyl" as used herein, means a saturated cyclic hydrocarbon group containing from 3 to 8 carbons. Examples of cycloalkyl include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, and cyclooctyl. The cycloalkyl groups of this invention are substituted with 0, 1, 2 or 3 substituents independently selected from alkenyl, alkoxy, alkoxyalkoxy, alkoxyalkyl, alkoxycarbonyl, alkoxycarbonylalkyl, alkoxysulfonyl, alkyl, alkylcarbonyl, alkylcarbonylalkyl, alkylcarbonyloxy, alkylsulfinyl, alkylsulfonyl, alkylthio, alkylthioalkyl, alkynyl, carboxy, carboxyalkyl, cyano, cyanoalkyl, formyl, haloalkoxy, haloalkyl, halogen, hydroxy, hydroxyalkyl, mercapto, oxo, (NZιZ2)alkyl, -NRARB, (NRARB)carbonyl and
(NRARβ)sulfonyl. Representative examples of cycloalkyl substituted with 0, 1, 2 or 3 substituents include, but are not limited to, 4-hydroxycyclohexyl and 2-hydroxycyclohexyl.
The term "ethylenedioxy," as used herein, refers to a -0(CH2)2O- group wherein the oxygen atoms of the ethylenedioxy group are attached to the parent molecular moiety through one carbon atom forming a 5 membered ring or the oxygen atoms of the ethylenedioxy group are attached to the parent molecular moiety through two adjacent carbon atoms forming a six membered ring.
The term "formyl," as used herein, refers to a -C(0)H group.
The term "halo" or "halogen," as used herein, refers to -CI, -Br, -I or -F. The term "haloalkoxy," as used herein, refers to at least one halogen, as defined herein, appended to the parent molecular moiety through an alkoxy group, as defined herein. Representative examples of haloalkoxy include, but are not limited to, chloromethoxy, 2-fluoroethoxy, trifluoromethoxy, and pentafluoroethoxy.
The term "haloalkyl," as used herein, refers to at least one halogen, as defined herein, appended to the parent molecular moiety through an alkyl group, as defined herein.
Representative examples of haloalkyl include, but are not limited to, chloromethyl, 2- fluoroethyl, trifluoromethyl, pentafluoroethyl, and 2-chloro-3-fluoropentyl. The term "heterocycle" or "heterocyclic," as used herein, refers to a monocyclic, bicyclic, or tricyclic ring system. Monocyclic ring systems are exemplified by any 3- or 4- membered ring containing a heteroatom independently selected from oxygen, nitrogen and sulfur; or a 5-, 6- or 7-membered ring containing one, two or three heteroatoms wherein the heteroatoms are independently selected from nitrogen, oxygen and sulfur. The 5-membered ring has from 0-2 double bonds and the 6- and 7-membered ring have from 0-3 double bonds. Representative examples of monocyclic ring systems include, but are not limited to, azetidinyl, azepanyl, aziridinyl, diazepinyl, 1,3-dioxolanyl, dioxanyl, dithianyl, furyl, imidazolyl, imidazolinyl, imidazolidinyl, isothiazolyl, isothiazolmyl, isothiazolidinyl, isoxazolyl, isoxazolinyl, isoxazolidinyl, moφholinyl, oxadiazolyl, oxadiazolinyl, oxadiazolidinyl, oxazolyl, oxazolinyl, oxazolidinyl, piperazinyl, piperidinyl, pyranyl, pyrazinyl, pyrazolyl, pyrazolinyl, pyrazolidinyl, pyridinyl, pyrimidinyl, pyridazinyl, pyrrolyl, pyrrolinyl, pyrrolidinyl, tetrahydrofuranyl, tetrahydrothienyl, tetrazinyl, tetrazolyl, thiadiazolyl, thiadiazolinyl, thiadiazolidinyl, thiazolyl, thiazolinyl, thiazolidinyl, thienyl, thiomoφholinyl, 1,1-dioxidothiomoφholinyl (thiomoφholine sulfone), thiopyranyl, triazinyl, triazolyl, and trithianyl. Bicyclic ring systems are exemplified by any of the above monocyclic ring systems fused to an aryl group as defined herein, a cycloalkyl group as defined herein, or another monocyclic ring system. Representative examples of bicyclic ring systems include but are not limited to, for example, benzimidazolyl, benzodioxinyl, benzothiazolyl, benzothienyl, benzotriazolyl, benzoxazolyl, benzofuranyl, benzopyranyl, benzothiopyranyl, cinnolinyl, indazolyl, indolyl, 2,3-dihydroindolyl, indolizinyl, naphthyridinyl, isobenzofuranyl, isobenzothienyl, isoindolyl, isoquinolinyl, phthalazinyl, pyranopyridinyl, quinolinyl, quinolizinyl, quinoxalinyl, quinazolinyl, tetrahydroisoquinolinyl, tetrahydroquinolinyl, and thiopyranopyridinyl. Tricyclic rings systems are exemplified by any of the above bicyclic ring systems fused to an aryl group as defined herein, a cycloalkyl group as defined herein, or a monocyclic ring system.
Representative examples of tricyclic ring systems include, but are not limited to, acridinyl, carbazolyl, carbolinyl, dibenzo[b,d]furanyl, dibenzo[b,d]thienyl, naphtho[2,3-b]furan, naphtho[2,3-b]thienyl, phenazinyl, phenothiazinyl, phenoxazinyl, thianthrenyl, thioxanthenyl and xanthenyl. The heterocycles of this invention are substituted with 0, 1, 2, or 3 substituents independently selected from alkenyl, alkoxy, alkoxyalkoxy, alkoxyalkyl, alkoxycarbonyl, alkoxycarbonylalkyl, alkoxysulfonyl, alkyl, alkylcarbonyl, alkylcarbonylalkyl, alkylcarbonyloxy, alkylsulfinyl, alkylsulfonyl, alkylthio, alkylthioalkyl, alkynyl, carboxy, carboxyalkyl, cyano, cyanoalkyl, ethylenedioxy, formyl, haloalkoxy, haloalkyl, halogen, hydroxy, hydroxyalkyl, mercapto, methylenedioxy, nitro, oxo, (NZiZ^alkyl, -NRARB, (NRARβ)carbonyl and (NRARβ)sulfonyl. The heterocycle groups of this invention may also be substituted with 1 additional aryl group or 1 additional heterocycle wherein the additional aryl group and the additional heterocycle are substituted with 0, 1, 2, 3, 4 or 5 substituents independently selected from alkenyl, alkoxy, alkoxyalkoxy, alkoxyalkyl, alkoxycarbonyl, alkoxycarbonylalkyl, alkoxysulfonyl, alkyl, alkylcarbonyl, alkylcarbonylalkyl, alkylcarbonyloxy, alkylsulfinyl, alkylsulfonyl, alkylthio, alkylthioalkyl, alkynyl, carboxy, carboxyalkyl, cyano, cyanoalkyl, ethylenedioxy, formyl, haloalkoxy, haloalkyl, halogen, hydroxy, hydroxyalkyl, mercapto, methylenedioxy, nitro, (NZιZ2)alkyl, -NRARB, (NRARB)carbonyl and (NRARB)sulfonyl.
Representative examples of heterocycle substituted with 0, 1, 2,or 3 substituents include, but are not limited to, 5-hydroxymethyl-2-furyl, 5-carboxy-2 -furyl, 6- hydroxymethyl-2-pyridinyl, 5-({[3-(dimethylamino)propyl]amino}carbonyl)-2-furyl, 5- {[(4-hydroxybutyl)amino]carbonyl} -2-furyl, 5-trifluoromethyl-3-pyridinyl, 3-
(aminocarbonyl)-2-pyridinyl, 5-({[2-(4-moφholinyl)ethyl]amino}carbonyl)-2-furyl, 5-{[(2- hydroxy-2-phenylethyl)amino]carbonyl}-2-furyl, 5-{[(5-hydroxy-l,5- dimethylhexyl)amino]carbonyl} -2-furyl, 5-( { [ 1 -(hydroxymethyl)butyl]amino } carbonyl)-2- furyl, 5-({[(4-methyl-l-piperazinyl)carbonyl]ammo}carbonyl)-2-furyl, 5-{[(2R)-2- (hydroxymethyl)-l-pyrrolidinyl]carbonyl}-2-furyl, 5-{[(2S)-2-(hydroxymethyl)-l- pyrrolidinyl]carbonyl} -2-furyl, and 5-[(4-hydroxy-l-piperidinyl)carbonyl]-2-furyl.
The term "heterocyclealkenyl" as used herein, means a heterocycle, as defined herein, appended to the parent molecular moiety through an alkenyl group, as defined herein. Representative examples of heterocyclealkenyl include, but are not limited to, 3- pyridin-3-yl-2-propenyl, and 4-pyrimidin-2-yl-3-butenyl.
The term "heterocyclealkyl" as used herein, means a heterocycle, as defined herein, appended to the parent molecular moiety through an alkyl group, as defined herein. Representative examples of heterocyclealkyl include, but are not limited to, pyridin-3- ylmethyl, 2-pyrimidin-2-ylρropyl, 2-(4-moφholinyl)ethyl, and 3-(lH-imidazol-l-yl)propyl. The term "heterocyclecarbonyl" as used herein, means a heterocycle, as defined herein, appended to the parent molecular moiety through a carbonyl group, as defined herein. Representative examples of heterocyclecarbonyl include, but are not limited to, 3- pyridinylcarbonyl, 4-moφholinylcarbonyl, 1-piperazinylcarbonyl, and {4-[3- (dimethylamino)propyl]-l-piperazinyl}carbonyl.
The term "hydroxy," as used herein, refers to an -OH group. The term "hydroxyalkyl," as used herein, refers to at least one hydroxy group, as defined herein, appended to the parent molecular moiety through an alkyl group, as defined herein. Representative examples of hydroxyalkyl include, but are not limited to, hydroxymethyl, 2-hydroxyethyl, 3-hydroxypropyl, 2-ethyl-4-hydroxyheptyl and 2,3- dihydroxypropyl.
The term "mercapto," as used herein, refers to a -SH group. The term "methylenedioxy," as used herein, refers to a -OCH2O- group wherein the oxygen atoms of the methylenedioxy are attached to the parent molecular moiety through two adjacent carbon atoms.
The term "nitro," as used herein, refers to a -NO2 group. The term "-NRARB," as used herein, refers to two groups, RA and Rβ, which are appended to the parent molecular moiety through a nitrogen atom. RA and RB are each independently selected from hydrogen, alkyl, alkylcarbonyl, aryl, arylalkyl, arylhydroxyalkyl, cycloalkyl, cycloalkylalkyl, formyl, heterocycle, heterocyclealkyl, hydroxyalkyl, or (NZιZ2)alkyl. Representative examples of -NRARB include, but are not limited to, amino, methylamino, dimethylamino, (2-(dimethylamino)ethyl)amino, (3- (dimethylamino)propyl)amino, (4-hydroxybutyl)amino, (1 -(hydroxymethyl)butyl)amino, (5-hydroxy-l,5-dimethylhexyl)amino, (2-hydroxy-2-phenylethyl)amino, (2-(4- moφholinyl)ethyl)amino, (4-hydroxycyclohexyl)amino, ((1 S)-l -hydroxy-2,3-dihydro-lH- inden-2-yl)amino, (2-(l -methyl-2-pyrrolidinyl)ethyl)amino, (3-(lH-imidazol-l - yl)propyl)amino, (4-moφholinyl)amino, and ((lS,2R)-2-hydroxycyclohexylmethyl)amino. The term "(NRARi carbonyl," as used herein, refers to a -NRARB group, as defined herein, appended to the parent molecular moiety through a carbonyl group, as defined herein. Representative examples of (NRARβ)carbonyl include, but are not limited to, aminocarbonyl, (methylamino)carbonyl, (dimethylamino)carbonyl, (ethylmethylamino)carbonyl, (3 -(dimethylamino)propyl)aminocarbonyl, (2- (dimethylamino)ethyl)aminocarbonyl, (5-hydroxy-l,5-dimethylhexyl)aminocarbonyl, (4- hydroxybutyl)aminocarbonyl and (l-(hydroxymethyl)butyl)ammocarbonyl.
The term "(NRARB)sulfonyl," as used herein, refers to a -NRARB group, as defined herein, appended to the parent molecular moiety through a sulfonyl group, as defined herein. Representative examples of (NRARB)sulfonyl include, but are not limited to, aminosulfonyl, (methylamino)sulfonyl, (dimethylamino)sulfonyl, (ethylmethylamino)sulfonyl, (3-(dimethylamino)propyl)aminosulfonyl, and (2- (dimethylamino)ethyl)aminosulfonyl.
The term "-NZιZ2," as used herein, refers to two groups, Zi and Z2, which are appended to the parent molecular moiety through a nitrogen atom. Z\ and Z2 are each independently selected from hydrogen, alkyl, alkylcarbonyl and formyl. Representative examples of -NZjZ2 include, but are not limited to, amino, methylamino, acetylamino, and acetylmethylamino .
The term "(NZιZ2)alkyl," as used herein, refers to a -NZιZ2 group, as defined herein, appended to the parent molecular moiety through an alkyl group, as defined herein.
Representative examples of (NZiZ^alkyl include, but are not limited to, 2-(amino)ethyl, 2- (dimethylamino)ethyl, 3-(amino)propyl, 3-(dimethylamino)propyl and (ethylmethylamino)carbonyl.
The term "(NZιZ2)carbonyl," as used herein, refers to a -NZ1Z2 group, as defined herein, appended to the parent molecular moiety through a carbonyl group, as defined herein. Representative examples of (NZιZ2)carbonyl include, but are not limited to, aminocarbonyl, (methylamino)carbonyl, (dimethylamino)carbonyl and (ethylmethylamino)carbonyl .
The term "(NZιZ2)sulfonyl," as used herein, refers to a -NZ1Z2 group, as defined herein, appended to the parent molecular moiety through a sulfonyl group, as defined herein. Representative examples of (NZιZ2)sulfonyl include, but are not limited to, aminosulfonyl, (methylamino)sulfonyl, (dimethylamino)sulfonyl and (ethylmethylamino)sulfonyl.
The term "oxo," as used herein, refers to a =O moiety. The term "sulfmyl," as used herein, refers to a -S(O)- group.
The term "sulfonyl," as used herein, refers to a -SO2- group. The term "sexual dysfunction," as used herein refers to male sexual dysfunction and female sexual dysfunction.
The term "male sexual dysfunction," as used herein includes, but is not limited to, male erectile dysfunction and premature ejacualtion. The term "female sexual dysfunction," as used herein includes, but is not limited to, female anorgasmia, clitoral erectile insufficiency, vaginal engorgement, dyspareunia, and vaginismus.
Compounds of the present invention may exist as stereoisomers wherein, asymmetric or chiral centers are present. These stereoisomers are "R" or "S" depending on the configuration of substituents around the chiral carbon atom. The terms "R" and "S" used herein are configurations as defined in IUPAC 1974 Recommendations for Section E, Fundamental Stereochemistry, Pure Appl. Chem., 1976, 45: 13-30. The present invention contemplates various stereoisomers and mixtures thereof and are specifically included within the scope of this invention. Stereoisomers include enantiomers and diastereomers, and mixtures of enantiomers or diastereomers. Individual stereoisomers of compounds of the present invention may be prepared synthetically from commercially available starting materials which contain asymmetric or chiral centers or by preparation of racemic mixtures followed by resolution well-known to those of ordinary skill in the art. These methods of resolution are exemplified by (1) attachment of a mixture of enantiomers to a chiral auxiliary, separation of the resulting mixture of diastereomers by recrystallization or chromatography and liberation of the optically pure product from the auxiliary or (2) direct separation of the mixture of optical enantiomers on chiral chromatographic columns.
Representative compounds of the present invention include: {5-[(l-benzyl-lH-indazol-3-yl)oxy]-2-furyl}methanol;
{6-[(l-benzyl-lH-indazol-3-yl)oxy]-2-pyridinyl}methanol;
5-[( 1 -benzyl- 1 H-indazol-3 -yl)oxy] -2-furaldehyde (6-chloro-3 - pyridazinyl)hydrazone;
5-[(l-benzyl-lH-indazol-3-yl)oxy]-2-furoic acid; 5-[( 1 -benzyl- 1 H-indazol-3 -yl)oxy] -N- [3 -(dimethylamino)propyl] -2-furamide;
5-[(l-benzyl-lH-indazol-3-yl)oxy]-N-(4-hydroxybutyl)-2-furamide;
5-[(l-benzyl-lH-indazol-3-yl)oxy]-N-[l-(hydroxymethyl)butyl]-2-furamide;
5-[(l-benzyl-lH-indazol-3-yl)oxy]-N-(5-hydroxy-l,5-dimethylhexyl)-2-furamide;
5-[(l-benzyl-lH-indazol-3-yl)oxy]-N-(2-hydroxy-2-phenylethyl)-2-furamide; 5-[( 1 -benzyl- 1 H-indazol-3 -yl)oxy]-N-[2-(4-moφholinyl)ethyl]-2-furamide;
1 -benzyl-3 -(2-pyrimidinyloxy)- 1 H-indazole ; l-benzyl-3-{[5-(trifluoromethyl)-3-pyridmyl]oxy}-lH-indazole; 2-[(l-benzyl-lH-indazol-3-yl)oxy]nicotinamide;
2- [( 1 -benzyl- 1 H-indazol-3 -yl)oxy]benzoic acid;
2-[(l-benzyl-lH-indazol-3-yl)oxy]-N-[2-(dimethylamino)ethyl]benzamide; N-[3-(4-{2-[(l -benzyl- 1 H-indazol-3 -yl)oxy]benzoyl } - 1 -piperazinyl)propyl] -N,N- dimethylamine; 2- [( 1 -benzyl- 1 H-indazol-3 -yl)oxy] -N- [3 -(dimethylamino)propyl]benzamide;
2-[(l-benzyl-lH-indazol-3-yl)oxy]-N-(4-hydroxycyclohexyl)benzamide; 2-[( 1 -benzyl- 1 H-indazol-3-yl)oxy]-N-[( 1 R,2S)- 1 -hydroxy-2,3-dihydro- 1 H-inden-2- yljbenzamide;
2- [( 1 -benzyl- 1 H-indazol-3 -yl)oxy] -N-[ 1 -(hydroxymethyl)butyl]benzamide; 2-[(l-benzyl-lH-indazol-3-yl)oxy]-N-(2-hydroxy-2-phenylethyl)benzamide;
2-[( 1 -benzyl- 1 H-indazol-3 -yl)oxy]-N-[2-( 1 -methyl-2-pyrrolidinyl)ethyl]benzamide; 2- [( 1 -benzyl- 1 H-indazol-3 -yl)oxy] -N- [3 -( 1 H-imidazol- 1 -yl)propyl]benzamide; 2-[(l-benzyl-lH-indazol-3-yl)oxy]-N'-(4-moφholinyl)benzohydrazide; 2-[(l-benzyl-lH-indazol-3-yl)oxy]-N-[(2-hydroxycyclohexyl)methyl]benzamide; 3 -(benzyloxy)- 1 - [3 -phenyl-2-propenyl] - 1 H-indazole;
5 - { [3 -(benzyloxy)- 1 H-indazol- 1 -yljmethyl } -2-furoic acid; (5- { [3 -(benzyloxy)- 1 H-indazol- 1 -yljmethyl} -2-furyl)methanol; 3-(benzyloxy)-l-({5-[(4-methyl-l-piperazinyl)carbonyl]-2-furyl}methyl)-lH-indazole; [ 1 -(5- {[3 -(benzyloxy)- 1 H-indazol- 1 -yljmethyl} -2-furoyl)-2-pyrrolidinyl]methanol; 5 - { [3 -(benzyloxy)- 1 H-indazol- 1 -yljmethyl } -N- [3 -(dimethylamino)propyl j-2- furamide; and
5- { [3 -(benzyloxy)-l H-indazol- 1 -yljmethyl} -N-(4-hydroxycyclohexyl)-2-furamide, or a pharmaceutically acceptable salt, ester, amide or prodrug thereof.
A preferred compound of the present invention is l-benzyl-3-(2-pyridinyloxy)-lH- indazole or a pharmaceutically acceptable salt, ester, amide or prodrug thereof.
Abbreviations
Abbreviations which have been used in the descriptions of the Schemes and the
Examples that follow are: Boc for tert-butoxycarbonyl; DMF for N,N-dimethylformamide; DMSO for dimethylsulfoxide; EDCI or EDC for l-ethyl-3-[3-(dimethylamino)proρyl]- carbodiimide hydrochloride; Et for ethyl; EtOAc for ethyl acetate; EtOH for ethanol; HObt for 1-hydroxybenzotriazole; MeOH for methanol; TEA for triethylamine; TFA for trifluoroacetic acid; THF for tefrahydrofuran; TLC for thin layer chromatography; Tos for (4-methylphenyl)sulfonyl.
Preparation of Compounds of the Present Invention The compounds of the present invention may be prepared by a variety of synthetic routes. Representative procedures are described in Schemes 1-13.
Scheme 1
Figure imgf000019_0001
Indazoles of general formula (6), wherein T, X, W, Y, Ri, R2, R3, R , R5, and Rβ are as defined in formula (I) can be prepared as described in Scheme 1. Benzoic acids of general formula (1) can be treated with hydrazine as described in L. Baiocchi et al.,
Synthesis, (1978) 633-648; V. J. Aran et al., Liebigs Ann., (1996) 683-691; and G. Zoni et al., Boll. Chim. Farm., (1968) 107, 598-605; to provide hydroxy indazoles of general formula (2). Hydroxyindazoles of general formula (2) can be treated with compounds of general formula (3) in the presence of sodium hydroxide to provide 1 -substituted 3- hydroxyindazoles of general formula (4). 1 -Substituted 3 -hydroxyindazoles of general formula (4) can be treated with compounds of general formula (5) in the presence of sodium hydroxide or potassium hydroxide to provide indazoles of general formula (6).
Indazoles of general formula (8), wherein R\, R2, R3, i, R5, and R6 are as defined in formula (I), can be prepared as described in Scheme 1. 1 -Substituted 3 -hydroxyindazoles of general formula (4) can be treated with a base such as sodium hydride and aryl groups or heterocycles of general formula (7), wherein 4 is selected from NO2, CI, Br, I, OS(O)2CH3 or OS(O)2CF3, to provide indazoles of general formula (8). Alternatively, 1-substituted 3- hydroxyindazoles of general formula (4) can be treated with a base such as potassium carbonate, Cul and aryl groups or heterocycles of general formula (7) to provide indazoles of general formula (8).
Scheme 2
Figure imgf000020_0001
(13) (14)
Indazoles of general formula (14), wherein T, X, W, Y, Ri, R2, R3, R4, R5, and R6 are as defined in formula (I), can be prepared as described in Scheme 2. Indazoles of general formula (10), purchased or prepared as described in the Examples and Schemes contained herein or prepared as described in R. Huisgen, K. Bast, Organic Syntheses, Coll. Vol. V, 650-653 (1973); Ed. John Wiley and Sons, New York-London, Sydney-Toronto; J. J. Song, N. K. Yee, Tetrahedron Letters, 2937-2940 (2001); and Heterocyclic Compounds, Chapter 10, Indazole and condensed types, p. 289-382, Ed. R. H. Wiley, New York- London-Sydney, can be treated with iodine and a base such as potassium hydroxide to provide 3-iodoindazoles of general formula (11). 3-Iodoindazoles of general formula (11) can be treated with n-bultyllithium followed by treatment with tert-butyllithium as described in Welch, W. M., et al. Synthesis, (1992) 937-939 to provide the dianion which can be treated with an aminating agent such as BocN(Li)OTos, prepared as described in C. Greek, L. Bischoff, A. Girard, J. Hajicek, J-P. Genet, Bull. Soc. Chim. Fr., 131, 429-433 (1994), to provide 3-N-Bocindazoles of general formula (12) as described in Greek, C. et al., Bull. Soc. Chim. Fr., (1994) 131, 429-433. 3-N-Bocindazoles of general formula (12) can be processed as described in Scheme 1 to provide N-Boc-indazoles of general formula (13). N-Boc-indazoles of general formula (13) can be treated with trifluoroacetic acid and then treated as described in Scheme 1 to provide Indazoles of general formula (14).
Scheme 3
Figure imgf000021_0001
Indazoles of general formula (18), wherein T, X, W, Y, Ri, R2, R3, R4, R5, and R6 are as defined in formula (I), can be prepared as described in Scheme 3. 3-Iodoindazoles of general formula (11) can be treated with n-bultyllithium followed by treatment with tert- butyllithium as described in Welch, W. M., et al. Synthesis, (1992) 937-939 to provide the dianion which can be treated with a disulfide of general formula (16) to provide indazoles of general formula (17) as described in Tetrahedron (2000) 56, 3709-3716. Indazoles of general formula (17) can be processed as described in Scheme 1 to provide indazoles of general formula (18).
Scheme 4
Figure imgf000022_0001
Pyrazolo[4,3-b]pyridines of general formula (22), wherein Ri, R3, R4, R5, and R6 are as defined in formula (I), can be prepared as described in Scheme 4. 3-Aminopyridine-2- carboxylic acids of general formula (20) can be treated with sodium nitrite and HC1/H20 followed by treatment with Na2SO3/H2O and then acidification with HCI to provide hydroxypyrazolo[4,3-b]pyridines of general formula (21) as described in J. Med. Chem. (1989) 32, 2128. Hydroxypyrazolo[4,3-b]pyridines of general formula (21) can be processed as described in Scheme 1 to provide pyrazolo[4,3-b]pyridines of general formula (22).
Scheme 5
Figure imgf000022_0002
Pyrazolo[3,4-d]pyrimidines of general formula (26), wherein Rls R2, R4, and Re are as defined in formula (I), can be prepared as described in Scheme 5. 4-Aminopyrimidine-5- carboxylic acids of general formula (24) can be processed as described in Scheme 4 to provide hydroxypyrazolo[3,4-d]pyrimidines of general formula (25). Hydroxypyrazolo[3,4- djpyrimidines of general formula (25) can be processed as described in Scheme 1 to provide pyrazolo[3,4-dJpyrimidines of general formula (26). Scheme 6
Figure imgf000023_0001
Pyrazolo[3,4-c]pyridines of general formula (30), wherein Rls R2, R3, R5, and R6 are as defined in formula (I), can be prepared as described in Scheme 6. 3-Aminoisonicotinic acids of general formula (28), can be processed as described in Scheme 4 and Scheme 1 to provide pyrazolo[3,4-c]pyridines of general formula (30).
Figure imgf000023_0002
Pyrazolo[3,4-b]pyridines of general formula (28), wherein Rls R2, R3, R4, and R6 are as defined in formula (I), can be prepared as described in Scheme 7. 2-Aminonicotinic acids of general formula (28) can be processed as described in Scheme 4 and Scheme 1 to provide pyrazolo[3,4-b]pyridines of general formula (28).
Scheme 8
Figure imgf000023_0003
Pyrazolo[4,3-cjpyridines of general formula (35), Ri, R2, i, R5, and R6 are as defined in formula (I), can be prepared as described in Scheme 8. N-Oxides of general formula (32) can be treated with hydrazine and then freated with refluxing hydrochloric acid to provide N-oxides of general formula (33). N-Oxides of general formula (33) can be reduced with Raney nickel as described in Aust. J. Chem., (1965) 18, 379-87 to provide hydroxypyrazolo[4,3-c]pyridines of general formula (34). Hydroxypyrazolo[4,3- cjpyridines of general formula (34) can be processed as described in Scheme 1 to provide pyrazolo[4,3-cjpyridines of general formula (35).
Figure imgf000024_0001
Pyrazolo[4,3-b]pyridines of general formula (41), wherein Ri, R3, R4, R5, and R6 are as defined in formula (I), can be prepared as described in Scheme 9. 2-Chloropyridin-3- a ines of general formula (37) can be treated with methylboronic acid under Suzuki conditions as described in Tetrahedron (1998) 6311; JACS 1940, 2228 to provide aminopyridines of general formula (38). Aminopyridines of general formula (38) can be treated with acetic anhydride as described in J. Med. Chem. (1980) 848 to provide acetamides of general formula (39). Acetamides of general formula (39) can be freated with nitrosyl chloride to provide the nitroso compound which can be reananged in refluxing benzene to pyrazolo[4,3-b]pyridines of general formula (40) as described in J.C.S. Perkin I (1973) 2901. Pyrazolo[4,3-b]pyridines of general formula (40) can be processed as described in Scheme 2 to provide Pyrazolo[4,3-b]pyridines of general formula (41).
Pyrazolo[4,3-b]pyridines of general formula (42), wherein Ri, R3, R4, R5, and R6 are as defined in formula (I), can be prepared as described in Scheme 9. Pyrazolo[4,3- bjpyridines of general formula (40) can be processed as described in Scheme 3 to provide Pyrazolo[4,3-bjpyridines of general formula (42).
Figure imgf000025_0001
Pyrazolo[3,4-cjpyridines of general formula (48), wherein Ri, R2, R3, R5, and Re are as defined in formula (I), can be prepared as described in Scheme 10. Nifropyridines of general formula (44) can be treated with iron in glacial acetic acid to provide aminopyridines of general formula (45) as described in Bull. Soc. Chim. Fr. (1992) 79. Aminopyridines of general formula (45) can be treated with acetic anhydride to provide acetamides of general formula (46) as described in J. Med. Chem. 1980, 23, 848. Acetamides of general formula (46) can be processed as described in Scheme 9 to provide pyrazolo[3,4-cjpyridines of general formula (47). Pyrazolo[3,4-c]pyridines of general formula (47) can be processed as described in Scheme 2 to provide pyrazolo[3,4-c]pyridines of general formula (48).
Pyrazolo[3,4-cjpyridines of general formula (49), wherein Ri, R2, R3, R5, and R6 are as defined in formula (I), can also be prepared as described in Scheme 10. Pyrazolo[3,4- cjpyridines of general formula (47) can be processed as described in Scheme 3 to provide pyrazolo[3,4-c]pyridines of general formula (49).
Figure imgf000026_0001
Pyrazolo[3,4-d]pyrimidines of general formula (50), wherein R\ and Re are as defined in formula (I), can be prepared as described in Scheme 11. 3-Amino-lH-pyrazole-
4-carboxamide can be heated at 185 °C with sulfuric acid in formamide to provide 1H- pyrazolo [3 ,4-d]pyrimidin-4-ol . 1 H-Pyrazolo [3 ,4-djpyrimidin-4-ol can be treated with phosphorous oxychloride and dimethylaniline to provide 4-chloro-lH-pyrazolo[3,4- djpyrimidine. 4-Chloro-lH-pyrazolo[3,4-d]pyrimidine can be treated with a transition metal catalyst such as pallladium on carbon under a hydrogen atmosphere to provide pyrazolo[3,4-d]pyrimidine as described in JACS (1956) 784. Pyrazolo[3,4-d]pyrrmidine can be processed as described in Scheme 2 to provide pyrazolo[3,4-d]pyrimidines of general formula (50). Pyrazolo[3,4-d]pyrimidines of general formula (51), wherein Ri and Re are as defined in formula (I), can also be prepared as described in Scheme 11. Pyrazolo[3,4- d]pyrimidine can be processed as described in Scheme 3 to provide pyrazolo[3,4- d]pyrimidines of general formula (51).
Scheme 12
Figure imgf000027_0001
Pyrazolo[3,4-b]pyridines of general formula (58), wherein Rj, R2, R3, R4, and R6 are as defined in formula (I), can be prepared as described in Scheme 12. 2-Chloro-3-nicotinic acids of general formula (54) can be treated with ethyl chloroformate and sodium borohydride followed by Swern oxidation with dimethylsulfoxide, oxalyl chloride, and triethylamine to provide aldehydes of general formula (56) as described in Chem. Pharm. Bull. (2000) 694. Aldehydes of general formula (56) can be treated with hydrazine hydrate in refluxing ethanol to provide pyrazolo[3,4-b]pyridines of general formula (57) as described in Can. J. Chem. (1988) 420. Pyrazolo[3,4-b]pyridines of general formula (57) can be processed as described in Scheme 2 to provide pyrazolo[3,4-b]pyridines of general formula (58).
Pyrazolo[3,4-b]pyridines of general formula (59), wherein Rl5 R2, R3, R4, and R6 are as defined in formula (I), can be prepared as described in Scheme 12. Pyrazolo[3,4- b]pyridines of general formula (57) can be processed as described in Scheme 3 to provide pyrazolo[3,4-b]pyridines of general formula (59).
Figure imgf000028_0001
Pyrazolo[4,3-c]pyridines of general formula (66), Rls R2, R4, and R6 are as defined in formula (I), can be prepared as described in Scheme 13. 3,4-Dichloropyridine-5- carboxylic acids of general formula (61) can be processed as described in Scheme 12 to provide aldehydes of general formula (63). Aldehydes of general formula (63) can be freated with hydrazine hydrate in refluxing ethanol to provide chloropyrazolo[4,3- c]pyridines of general formula (64) as described in Can. J. Chem. (1988) 420. Chloropyrazolo[4,3-c]pyridines of general formula (64) can be treated with a metal transition catalyst such as palladium on carbon under a hydrogen atmosphere to provide pyrazolo[4,3-c]pyridines of general formula (65) as described in JACS (1956) 784.
Pyrazolo[4,3-c]pyridines of general formula (65) can be processed as described in Scheme 2 to provide pyrazolo[4,3-c]pyridines of general formula (66).
Pyrazolo[4,3-c]pyridines of general formula (67), Rls R2, R4, and Rβ are as defined in formula (I), can be prepared as described in Scheme 13. Pyrazolo[4,3-c]pyridines of general formula (65) can be processed as described in Scheme 3 to provide pyrazolo[4,3- cjpyridines of general formula (67). Example 1 (5- (l-benzyl-lH-indazol-3-yl oxy]-2-furyl}methanol
Example 1A 1 -benzyl- 1 H-indazol-3 -ol
3 -Hydroxy indazole (6.7 g, 50 mmol) and solid sodium hydroxide (8.0 g, 200 mmol) in DMSO (100 mL) were treated with benzyl bromide (6.5 mL, 55 mmol) at room temperature. After stirring for 24 hours, the mixture was treated with water (250 mL) and the resulting solution was acidified with 10% citric acid to pH 4 and extracted with ethyl acetate. The ethyl acetate layer was washed with water, brine, dried with anhydrous MgSO4, filtered and the filtrate concentrated under reduced pressure to provide 9.5 g of crude product. Diethyl ethyl was added to the crude and the resultant precipitate was filtered. The filtrate was concentrated under reduced pressure and purified by column chromatography (silica gel, 3:1 hexanes:EtOAc) to provide the title compound, 6.7 g (combined yield). 1H NMR (300 MHz, DMSO-d6) δ 5.36 (s, 2H), 7.00 (t, J=9 Hz, IH), 7.25 (m, 6H), 7.52 (d, J=9 Hz, IH), 7.61 (d, J=9 Hz, IH), 10.70 (s, IH); MS (APCI+) m/z 225 (M+H)+.
Example IB 5- (l-benzyl-lH-indazol-3-vDoxyl-2-furaldehvde
The product from Example 1A (120 mg, 0.53 mmol) and 5-nitro-2-furaldehyde (76 mg, 0.54 mmol) in THF (20 mL) were freated with NaH (60% oil dispersion) (22 mg, 0.55 mmol) and the resulting mixture was stirred at ambient temperature for 16 hours. The mixture was concentrated under reduced pressure, acidified with 10% citric acid and extracted with EtOAc. The ethyl acetate layer was washed with water, brine, dried with MgSO4, filtered and the filtrate concentrated under reduced pressure. The residue was chromatographed (silica gel, 1:1 hexanes: EtOAc) to provide 120 mgs of the title compound. 1H NMR (300 MHz, DMSO-d6) δ 5.61 (s, 2H), 6.22 (d, J=3 Hz, IH), 7.00 (t, J=9 Hz, IH), 7.25 (m, 6H), 7.50 (m, IH), 7.63 (m, 2H), 7.79 (d, J=9 Hz, IH), 9.41 (s, IH); MS (APCI+) m/z 319 (M+H)+. Example 1C
{5-[(l-benzyl-lH-indazol-3-yl oxy1-2-furyl}methanol The product from Example IB (96 mg, 0.3 mmol) in ethanol (5 mL) was treated with NaBH4 (8 mg, 0.2 mmol) and refluxed for 30 minutes. The mixture was allowed to cool to room temperature, freated with 10% citric acid and extracted with EtOAc. The ethyl acetate layer was washed with water, brine, dried with MgSO4, filtered and the filtrate concentrated under reduced pressure. The residue was purified by column chromatography (silica gel, 1 : 1 hexanes: EtOAc) to provide 90 mg of the title compound. H NMR (300 MHz, DMSO-de) δ 4.31 (d, J=6 Hz, 2 H), 5.19 (t, J=6 Hz, IH), 5.55 (s, 2H), 5.84 (d, J=3 Hz, IH), 6.30 (d, J=3 Hz, IH), 7.13 (t, J=9 Hz, IH), 7.25 (m, 5H), 7.45 (m, 2H), 7.70 (d, J=9 Hz, IH); MS (DCI-NH3) m/z 321 (M+H)+. Analysis calcd for Cι9Hi6N203: C, 71.24; H, 5.03; N, 8.74. Found: C, 71.03; H, 4.97; N, 8.87.
Example 2 (6- |Y 1 -benzyl- 1 H-indazol-3 -vDoxy] -2-pyridinyl} methanol
Example 2A methyl 6- [( 1 -benzyl- 1 H-indazol-3 -vDoxy] -2-pyridinecarboxylate The product from Example 1A (224 mg, 1 mmol), K2CO3 (276 mg, 2 mmol), methyl 6-chloro-2-pyridinecarboxylate (342 mg, 2 mmol) and Cu (25 mg) in pyridine (25 mL) was refluxed for 16 hours. The mixture was allowed to cool to room temperature, concentrated under reduced pressure and the residue was partitioned between water and EtOAc. The ethyl acetate layer was washed with water, brine, dried with MgSO4, filtered and the filtrate concentrated under reduced pressure. The residue was purified by chromatography (silica gel, 1 : 1 hexanes :EtO Ac) to afford 140 mg of the title compound, mp 92-94 °C; Η NMR (300 MHz, DMSO-d6) δ 3.88 (s, 3H), 5.57 (s, 2H), 7.08 (m, IH), 7.30 ( , 7H), 7.42 (m,
IH), 7.74 (d, J=9 Hz, IH), 8.26 (dd, J=3 Hz and 9Hz, IH), 8.36 (dd, J=3 Hz and 9 HZ, IH); MS (APCI+) m/z 360 (M+H)+. Analysis calcd for C2ιH17N3O3: C, 70.18; H, 4.77; N, 11.69. Found: C, 70.47; H, 4.72; N, 11.59.
Example 2B
{6-r(l-benzyl-lH-indazol-3-yl oxyl-2-pyridinyl)methanol The product from Example 2 A (110 mg, 0.3 mmol) and NaBEL (38 mg, 1 mmol) in
THF (15 mL) was treated with methanol (5 mL) dropwise at 50-55 °C. After stirring for 30 minutes, the mixture was concentrated under reduced pressure, dissolved in EtOAc, washed with water, brine and dried with MgSO , filtered and the filtrate concentrated, the residue was purified by column chromatography (silica gel, 1 : 1 hexanes:EtOAc) to provide 70 mg of the title compound, mp 156-158 °C; !H NMR (300 MHz, DMSO-d6) δ 4.71 (d, J=7 Hz, 2H), 5.43 (t, J=7 Hz, IH), 5.57 (s, 2H), 7.05 (t, J=9 Hz, IH), 7.30 (m, 7H), 7.40 ( , IH), 7.72 (d, J=9 Hz, IH), 7.92 ( , 2H); MS (APCI+) m/z 332 (M+H)+. Analysis calcd for C20Hι7N3O2: C, 72.49; H, 5.17; N, 12.68. Found: C, 72.15; H, 5.19; N, 12.48.
Example 3
5-[(l-benzyl-lH-indazol-3-yl oxy1-2-furaldehyde (6-chloro-3-pyridazinv hydrazone The product from Example IB (96 mg, 0.3 mmol) and acetic acid (2 drops) in MeOH (5 mL) and THF (10 mL) were treated with 3-chloro-6-hydrazinopyridazme (46 mg, 0.4 mmol). After stirring at room temperature for 16 hours, the mixture was concentrated under reduced pressure. The residue was dissolved in EtOAc, washed with water, brine, dried with MgS0 , filtered and the filtrate was concentrated under reduced pressure. The residue was purified by column chromatography (silica gel, 4:1
Figure imgf000031_0001
to provide 115 mg of the title compound, mp 200-202 °C; !H NMR (300 MHz, DMSO-d6) δ 5.57 (s, 2H), 6.10 (d, J=3 Hz, IH), 6.86 (d, J=3 Hz, IH), 7.27 (m, 6H), 7.48 (t, J=9 Hz, 2H), 7.60 (dd, J=6 Hz, 9 Hz, 2H), 7.75 (d, J=9 Hz, IH), 7.92 (s, IH), 11.63 (s, 1 H; MS (APCI+) m/z 445 (M+H)+; (APCI-) m/z 443 (M-H)-; 479 (M+Cl)"; Analysis calcd for C23H17C1N6O2-0.75 H2O: C, 60.26; H, 4.07; N, 18.30. Found: C, 60.30; H, 3.96; N, 17.86.
Example 4 5-[(l-benzyl-lH-indazol-3-yl oxy1-2-furoic acid
Example 4A methyl 5- IY 1 -benzyl- 1 H-indazol-3 -vDoxy] -2-furoate The product from Example 1 A (224 mg, 1 mmol) and methyl 5-nitro-2-furoate (255 mg, 1.5 mmol) in DMSO (15 mL) were freated with 60% oil dispersion NaH (80 mg, 2 mmol). After refluxing (80 °C) for 4 hours, the mixture was allowed to cool to room temperature, water was added and the mixture was extracted with EtOAc. The ethyl acetate layer was washed with water, brine, dried with MgSO4, filtered and the filtrate concentrated under reduced pressure. The residue was purified by column chromatography (silica gel, 3:1 hexanes:EtOAc) to provide 300 mg of the title compound, mp 89-91 °C; !H NMR (300 MHz, DMSO-d6) δ 3.80 (s, 3H), 5.59 (s, 2H), 6.17 (d, J=4 Hz, 1 H), 7.26 (m, 6H), 7.39 (d, J=4 Hz, IH), 7.48 (m, IH), 7.61 (d, J=9 Hz, IH), 7.77 (d, J=9 Hz, IH); MS (APCI+) m/z 349 (M+H)+. Analysis calcd for C2oHι6N204: C, 68.96; H, 4.63; N, 8.04. Found: C, 68.24; H, 4.53; N, 7.97.
Example 4B 5- (l-benzyl-lH-indazol-3-yl)oxyl-2-furoic acid
The product from Example 4A (140 mg, 0.4 mmol) in MeOH (15 L) was freated with IN NaOH (1 mL, 1 mmol). After stirring at ambient temperature for 2 hours, the mixture was treated with water (10 mL). The methanol was removed under reduced pressure and the aqueous solution was acidified with 10% citric acid to pH 3. The resultant solid was filtered, washed with water and dried under reduced pressure to afford 100 mg of the title compound, mp 162-165 °C; !H NMR (300 MHz, DMSO-d6) δ 5.59 (s, 2H), 6.11 (d, J=4 Hz, 1 H), 7.26 (m, 7H), 7.48 (m, IH), 7.60 (d, J=9 Hz, IH), 7.7? (d, J=9 Hz, IH), 12.60 (br s, IH); MS (APCI+) m/z 335 (M+H)+.
Example 5
5- (l-benzyl-lH-indazol-3-yl oxy]-N-[3-(dimethylamino")propyll-2-furamide The product from Example 4B (100 mg, ~0.3 mmol) was treated with 3- dimethylamino-1-propylamine (0.126 mL, 1 mmol), N-hydroxysuccinimide (57 mg, 0.5 mmol) and EDCI (191 mg, 1 mmol) in CHC13 (10 mL) and 1,4-dioxane (10 mL) at room temperature. After stirring for 16 hours, the solvents were removed under reduced pressure. The residue was dissolved in EtOAc, washed with water, brine, dried with MgSO4, filtered and the filtrate concentrated under reduced pressure. The residue was purified by column chromatography (silica gel, 3:1 CH2Cl2:EtOH, plus a few drops of concentrated NEUOH) to provide 55 mg of the title compound. !H NMR (300 MHz, DMSO-d6) δ 1.64 (quintet, J=7 Hz, 2 H), 2.20 (s, 6H), 2.37 (t, J=7 Hz, 2 H), 3.22 (m, 2 H), 5.59 (s, 2H), 6.10 (d, J=4 Hz, 1 H), 7.10 (d, J=4 Hz, IH), 7.26 (m, 6H), 7.48 (m, IH), 7.55 (d, J=9 Hz, IH), 7.75 (d, J=9 Hz, IH), 8.48 (t, J=7 Hz, IH); MS (APCI+) m/z 419 (M+H)+; (APCI-) m/z 453 (M+Cl)". )+; Analysis calcd for C24H26N403 1.5 H20: C, 64.72; H, 6.51; N, 12.58. Found: C, 65.00; H, 6.23; N, 12.59.
Example 6 5-|Y 1 -benzyl- 1 H-mdazol-3-yl)oxy]-N-(4-hvdroxybutyl')-2-furamide
The product from Example 4B (50 mg, 0.15 mmol) in CHCl3/l,4-dioxane (1:1) (5 mL) was freated with EDCI (42 mg, 0.22 mmol) and N-hydroxysuccinimide (26 mg, 0.15 mmol). After stirring at ambient temperature for lhour, the mixture was treated with 4- amino-1-butanol (133 mg, 0.15 mmol) and the reaction mixture was stirred at ambient temperature for an additional 16 hours. The reaction mixture was diluted with CHC13 (5 mL) and the phases separated. The organic layer was washed with water (2 mL), dried over anhydrous Na2SO4, filtered and the filtrate concentrated under reduced pressure. The residue was purified by flash chromatograpy (silica gel, 1:1 hexanes: EtOAc) to provide the title compound. 1H NMR (499.6 MHz, CDC13) δ 7.60 (d, J=10 Hz, IH), 7.19 (m, 9H), 6.41 (br s, IH), 6.00 (d, J=5 Hz, IH), 5.47 (s, 2H), 3.70 (t, J=5 Hz, 2H), 3.46 (q, J=5 Hz, 2H), 1.67 (m, 4H); MS (ESI) m/z 406 (M+H)+.
Example 7 5-[(l-benzyl-lH-indazol-3-yl oxy1-N- l-(hvdroxymethyl')butyll-2-furamide The product from Example 4B and 2-amino-l-pentanol were processed according to the procedure described in Example 6 to provide the title compound. 1H NMR (499.6 MHz, CDC13) δ 7.62 (d, J=10 Hz, IH), 7.25 (m, 9H), 6.28 (br d, J=10 Hz, IH), 6.02 (d, J=5 Hz, IH), 5.47 (s, 2H), 4.12 (m, IH), 3.77 (dd, J=3.4, 10 Hz, IH), 3.68 (dd, J=5, 10 Hz, IH), 1.59 (m, 2H), 1.43 (m, 2H), 0.95 (t, J=10 Hz, 3H); MS (ESI) m/z 420 (M+H)+.
Example 8 S-r i-benzyl-lH-indazol-S-yDoxyl-N-fS-hvdroxy- S-dimethylhexyD-Σ-furamide The product from Example 4B and 6-amino-2-methyl-2-heptanol were processed according to the procedure described in Example 6 to provide the title compound. !H NMR (499.6 MHz, CDC13) δ 7.61 (d, J=10 Hz, IH), 7.24 (m, 9H), 6.01 (d, J=10 Hz, IH), 5.98 (br d, J=10 Hz, IH), 5.47 (s, 2H), 4.19 (m, IH), 1.49 (m, 6H), 1.23 (d, J=10 Hz, 3H), 1.21 (s, 3H), 1.20 (s, 3H); MS (ESI) m/z 462 (M+H)+.
Example 9 363987 5 - ["( 1 -benzyl- 1 H-indazol-3 -vDoxy] -N-(2-hydroxy-2-phenylethyl -2-furamide The product from Example 4B and 2-amino- 1 -phenylethanol were processed according to the procedure described in Example 6 to provide the title compound. lR NMR (499.6 MHz, CDC13) δ 7.67 (d, J=10 Hz, IH), 7.59 (d, J=5 Hz, IH), 7.50 (d, J=5 Hz, IH), 7.27 (m, 1 IH), 6.62 (br s, IH), 6.20 (d, J=5 Hz, IH), 6.03 (d, J=5 Hz, IH), 5.47 (d, J=5 Hz, 2H), 4.93 (dd, J=5, 10 Hz, IH), 3.85 (m, IH), 3.51 (m, IH); MS (ESI) m/z 454 (M+H)+.
Example 10
5-[(l-benzyl-lH-indazol-3-yl)oxy1-N-[2-(4-morpholinyl')ethyll-2-furamide
The product from Example 4B and 2-amino-l -phenylethanol were processed according to the procedure described in Example 6 to provide the title compound. lH NMR (499.6 MHz, CDC13) δ 7.59 (d, J=5 Hz, IH), 7.25 (m, 9H), 6.66 (br s, IH), 5.99 (d, J=5 Hz,
IH), 5.47 (s, 2H), 3.69 (t, J=5 Hz, 4H), 3.51 (q, J=5 Hz, 2H), 2.56 (t, J=5 Hz, 2H), 2.48 (m,
4H); MS (ESI) m/z 447 (M+H)+.
Example 11 1 -benzyl-3 -(2-pyridinyloxy)- 1 H-indazole
The product from Example 1 A (100 mg, 0.44 mmol) in DMF (2 mL) was treated with Cs2C03 (286 mg, 0.88mmol) and 2-fluoropyridine (86 mg, 0.88 mmol) and heated to 110 °C for 16 hours. The reaction mixture was allowed to cool to ambient temperature and diluted with Et20 (15 mL). The organic layer was washed with water (2 mL), dried over anhydrous Na2S04, filtered and the filtrate concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 1:1 hexanes:EtOAc) to provide the title compound. *H NMR (499.6 MHz, CDC13) δ 8.18 (br d, J=3.8 Hz, IH), 7.72 (m, IH), 7.44 (d, J=5 Hz, IH), 7.33 (m, 7H), 7.12 (d, J=5 Hz, IH), 7.05 (m, 2H), 5.51 (s, 2H); MS (ESI) m/z 302 (M+H)+.
Example 12 1 -benzyl-3 -(2-p yrimidinyloxy)- 1 H-indazole The product from Example 1 A and 2-chloropyrimidine were processed according to the procedure described in Example 11 to provide the title compound. !H NMR (499.6 MHz, CDC13) δ 8.59 (d, J=5 Hz, 2H), 7.48 (d, J=10 Hz, IH), 7.30 (m, 7H), 7.09-7.12 (m, 2H), 5.55 (s, 2H); MS (ESI) m/z 303 (M+H)+.
Example 13 l-benzyl-3-(r5-(trifluoromethyl -3-pyridmylloxy}-lH-indazole The product from Example 1A and 3-chloro-5-trifluoromethylpyridine were processed according to the procedure described in Example 11 to provide the title compound. 1H NMR (499.6 MHz, CDC13) δ 7.90 (m, IH), 7.60 (m, IH), 7.28 (m, 10H), 5.55 (s, 2H); MS (ESI) m/z 370 (M+H)+.
Example 14 2-[fl-benzyl-lH-indazol-3-yl oxy]nicotinamide The product from Example 1A (100 mg, 0.44 mmol), K2C03 (122 mg, 2 mmol), 2- chloronicotinamide (140 mg, 2 mmol) and Cu (10 mg) in pyridine (10 mL) were combined and refluxed for 16 hours. The mixture was allowed to cool to room temperature and concenfrated under reduced pressure. The residue was partitioned between water and EtOAc. The ethyl acetate layer was washed with water, brine, dried with MgS04, filtered and the filfrate concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 1:1 hexanes :EtO Ac) to afford 59 mg of the title compound. ]H NMR (499.6 MHz, CDC13) δ 8.65 (dd, J=5, 10 Hz, IH), 8.20 (m, IH), 7.76 (br s, IH), 7.34 (m, 8H), 7.21 dd, J=4.5, 7.5 Hz, IH), 7.12 (m, IH), 6.09 (br s, IH), 5.55 (s, 2H); MS (ESI) m/z 345 (M+H)+.
Example 15 2- [(1 -benzyl- lH-indazol-3-yl)oxy1benzoic acid The product from Example 1A and 2-bromobenzoic acid were processed according to the procedure described in Example 14 to provide the title compound. The product was isolated by concenfrating the pyridine layer and extracting with water (2 mL). The aquoeus layer was then acidified to pH 3.0 with 10% HCI and extracted with EtOAc (5 mL). The EtOAc layer was dried over anhydrous Na2S04, filtered and the filtrate concentrated under reduced pressure to afford 60 mg of the title compound. !H NMR (499.6 MHz, CDC13) δ 8.5 (br s, IH), 7.78 (s, IH), 7.57 (d, J=5 Hz, IH), 7.31 (m, 10H), 7.13 (t, J=5 Hz, IH), 5.47 (s, 2H); MS (ESI) m/z 345 (M+H)+.
Example 16
2-r(l-benzyl-lH-indazol-3-yl oxyl-N- 2-(dimethylamino')ethyllbenzamide The product from Example 15 and N,N-dimethyl-l,2-ethanediamine were processed according to the procedure described in Example 6 to provide the title compound. Η NMR (499.6 MHz, CDC13) δ 2.85 (s, 6H), 3.15 (m, 2H), 3.58 (m, 2H), 4.54 (m, IH), 4.76 (m, IH), 7.30 (m, 1 IH), 7.79 (m, 2H), 7.97 (br m, IH); MS (ESI) m/z 415 (M+H)+.
Example 17 N-r3-(4-{2- (l-benzyl-lH-indazol-3-yl oxy]benzoyl}-l-piperazinyl')propyl]-N,N- dimethylamine The product from Example 15 and N,N-dimethyl-N-[3-(l -piperazinyl)propyl]amine were processed according to the procedure described in Example 6 to provide the title compound. !H NMR (499.6 MHz, CDC13) δ 2.35 (m, 4H), 2.83 (s, 6H), 3.20 (m, 5H), 3.47 (m, 3H), 3.79 (m, IH), 4.00 (m, IH), 4.55 (d, J=15.0 Hz, IH), 4.78 (d, J=15.0 Hz, IH), 4.78 (d, J=15.0 Hz, IH), 7.24 (m, 6H), 7.41 (m, 2H), 7.50 (m, 3H), 7.83 (d, J=10.0 Hz, IH); MS (ESI) m/z 498 (M+H)+.
Example 18 2- jϊ 1 -benzyl- 1 H-indazol-3 -vDoxy] -N-f 3 -(dimethylamino propyl]benzamide The product from Example 15 and N,N-dimethyl-l,3-propanediamine were processed according to the procedure described in Example 6 to provide the title compound. *H NMR (499.6 MHz, CDC13) δ 2.00 (s, 6H), 2.68 (m, 2H), 2.97 (t, J=5.0 Hz, 2H), 3.13 (m, IH), 3.27 (m, IH), 4.55 (d, J=15.0 Hz, IH), 4.95 (d, J=15.0 Hz, IH), 7.01 (m, 2H), 7.29 (m, 7H), 7.51 (m, 2H), 7.65 (m, IH), 7.81 (m, 2H); MS (ESI) m/z 429 (M+H)+.
Example 19
2- \( 1 -benzyl- 1 H-indazol-3 -yl)oxy1-N-f 4-hvdroxycvclohexyI)benzamide The product from Example 15 and 4-aminocyclohexanol were processed according to the procedure described in Example 6 to provide the title compound. !H NMR (499.6 MHz, CDC13) δ 0.85 (m, IH), 7.88 (m, IH), 1.32 (m, 4H), 1.72 (m, IH), 1.95 (m, 2H), 3.52 (m, IH), 3.67 (m, IH), 4.48 (d, J=15.0 Hz, IH), 4.79 (d, J=15.0 Hz, IH), 7.01 (m, IH), 7.22 (m, 8H), 7.49 (m, 2H), 7.62 (m, IH), 7.79 (m, IH); MS (ESI) m/z 442 (M+H)+.
Example 20 2-r(l-benzyl-lH-indazol-3-vnoxyl-N-r(lR.2SVl-hvdroxy-2.3-dihvdro-lH-inden-2- yllbenzamide The product from Example 15 and (lR,2S)-2-amino-2,3-dihydro-lH-inden-l-ol were processed according to the procedure described in Example 6 to provide the title compound. 1H NMR (499.6 MHz, CDC13) δ 2.60 (m, 2H), 2.97 (m, IH), 3.12 (dd, J=5.0, 20.0 Hz, IH), 4.63 (s, IH), 4.86 (s, IH), 5.43 (br s, IH), 7.48 (m, 17H); MS (ESI) m/z 476 (M+H)+.
Example 21
2-[( 1 -benzyl- 1 H-indazol-3 -yl)oxyl-N-[ 1 -(hydroxymethylϊbutyllbenzamide The product from Example 15 and 2-amino-l-pentanol were processed according to the procedure described in Example 6 to provide the title compound. 1H NMR (499.6 MHz, CDC13) δ 0.93 (m, 3H), 1.40 (m, IH), 1.51 (m, IH), 2.13 (m, 2H), 3.33 (m, IH), 3.53 (m, IH), 3.96 (m, IH), 4.08 (d, J=15.0 Hz, IH), 4.51 (d, J=15.0 Hz, IH), 7.50 (m, 13H); MS (ESI) m/z 430 (M+H)+.
Example 22 2-[(l-benzyl-lH-mdazol-3-yl')oxy1-N-(2-hvdroxy-2-phenylethyl')benzamide The product from Example 15 and 2-amino- 1 -phenylethanol were processed according to the procedure described in Example 6 to provide the title compound. *H NMR (499.6 MHz, CDC13) δ 3.23 (m, IH), 3.43 (m, IH), 3.68 (m, IH), 4.48 (m, IH), 4.63 (m, IH), 4.80 (m, IH), 7.13 ( , 3H), 7.24 (m, 7H), 7.31 (m, 2H), 7.47 (m, 2H), 7.57 (t, J=10.0 Hz, IH), 7.72 (m, 2H), 7.83 (d, J=5.0 Hz, IH); MS (ESI) m/z 464 (M+H)+.
Example 23 2-IY 1 -benzyl- 1 H-indazol-3 -yl)oxy"|-N- [2-( 1 -methyl-2-ρyrrolidinyl ethyl]benzamide
The product from Example 15 and 2-(l-methyl-2-pynolidinyl)ethylamine were processed according to the procedure described in Example 6 to provide the title compound. !H NMR (499.6 MHz, CDC13) δ 1.86 (s, 3H), 2.04 (m, 5H), 2.51 (m, IH), 2.71 (m, 2H), 3.19 (m, IH), 3.31 (m, IH), 3.84 (m, IH), 4.58 (d, J=15.0 Hz, IH), 5.04 (d, J=15.0 Hz, IH), 6.92 (m, IH), 7.05 (m, IH), 7.28 (m, 5H), 7.50 (m, 3H), 7.72 (m, IH), 7.79 (m, IH), 7.87 (m, IH); MS (ESI) m/z 455 (M+H)+.
Example 24 2-[( 1 -benzyl- 1 H-indazol-3 -vDoxy] -N- [3 -( 1 H-imidazol- 1 -vDpropyllbenzamide The product from Example 15 and 3 -(1 H-imidazol- 1 -yl)propylamine were processed according to the procedure described in Example 6 to provide the title compound. !H NMR (499.6 MHz, CDC13) δ 1.74 (m, IH), 1.82 (m, IH), 3.10 (m, IH), 3.19 (m, IH), 3.94 (m, 2H), 4.53 (d, J=15.0 Hz, IH), 4.98 (d, J=15.0 Hz, IH), 6.98 (m, 2H), 7.25 (m, 7H), 7.55 (m, 2H), 7.68 (m, 2H), 7.82 (m, 2H), 8.55 (s, IH); MS (ESI) m/z 452 (M+H)+.
Example 25 2-[( 1 -benzyl- 1 H-indazol-3 -yl)oxy]-N'-(4-moφholmvDbenzohvdrazide The product from Example 15 and 4-moφholinamine were processed according to the procedure described in Example 6 to provide the title compound. !H NMR (499.6 MHz, CDC13) δ 2.48 (m, 2H), 2.63 (m, 2H), 3.69 (m, 4H), 4.47 (d, J=15.0 Hz, IH), 4.81 (d,
J=15.0 Hz, IH), 7.04 (m, 2H), 7.24 (m, 6H), 7.50 (m, 2H), 7.61 (m, IH), 7.81 (m, IH), 7.89 (d, J=5.0 Hz, IH); MS (ESI) m/z 429 (M+H)+.
Example 26 2-[( 1 -benzyl- 1 H-indazol-3 -ypoxyl -N- r(2-hydroxycyclohexyl methyl]benzamide
The product from Example 15 and 2-(aminomethyl)cyclohexanol were processed according to the procedure described in Example 6 to provide the title compound. !H NMR (499.6 MHz, CDC13) δ 1.30 (m, 5H), 1.74 (m, IH), 2.56 (m, IH), 2.88 (m, IH), 3.21 (m, IH), 3.80 (m, IH), 3.97 (m, IH), 4.48 (d, J=15.0 Hz, 2H), 4.73 (d, J=15.0 Hz, IH), 4.82 (d, J=15.0 Hz, IH), 6.90 (m, IH), 7.05 (m, IH), 7.38 (m, 6H), 7.71 (m, IH), 7.87 (d, J=10.0 Hz, 2H), 8.11 (m, IH), 8.03 (m, IH), 7.87 (d, J=10.0 Hz, 2H); MS (ESI) m/z 456 (M+H)+. Example 27 3 -(benzyloxy)- 1 - [3 -phenyl-2-propenyl] - 1 H-indazole The product from Example 1A (70 mg, 0.31 mmol), cinnamyl bromide (99 mg, 0.5 mmol) and KOH (28 mg, 0.5 mmol) in DMSO (10 mL) were stirred at room temperature for 20 hours. The mixture was poured in water and exfracted with ethyl acetate. The acetate layer was washed with water, 10% citric acid, brine, dried with anhydrous MgS04, filtered and the filtrate concentrated under reduced pressure. The residue was purified by column chromatography (silica gel, 17:3 hexanes:Et20) to provide 75 mg (71%) of the title compound. !H NMR (300 MHz, DMSO-d6) δ 5.05 (d, J=6 Hz, 2H), 5.42 (s, 2H), 6.40 (m, IH), 6.55 (m, IH), 7.06 (m, IH), 7.33 (m, 9H), 7.60 (m, 4H); MS (APCI+) m/z 341 (M+H)+.
Example 28 5 - { ["3 -(benzyloxy)- 1 H-indazol- 1 -yllmethyll -2-furoic acid
Example 28A ethyl 5- { [3 -(benzyloxyV 1 H-indazol- 1 -yllmethyll -2-furoate 3-Hydroxyindazole (336 mg, 1.5 mmol), ethyl 5-(chloromethyl)-2-furoate (0.32 mL, 2 mmol) and solid NaOH (80 mg, 2 mmol) in anhydrous DMSO (15 mL) were stirred at room temperature for 14 hours. The mixture was poured into icy water and exfracted with EtOAc. The extract was washed with water, brine, dried with anhydrous MgS04, filtered and the filtrate concentrated under reduced pressure. The residue was purified by chromatography (silica gel, 3:1 hexanes :EtO Ac) to afford 450 mg (79%) of title compound. 1H NMR (300 MHz, DMSO-d6) δ 1.24 (t, J=7 Hz, 3H), 4.23 (q, J=7 Hz, 2H), 5.37 (s, 2H), 5.56 (s, 2H), 6.48 (d, J=3 Hz, IH), 7.09 (m, IH), 7.20 (d, J=3 Hz, IH), 7.38 (m, 4H), 7.50 (m, 2H), 7.62 (m, 2H); MS (APCI+) m/z 377 (M+H)+. Analysis calcd for C22H20N2O4: C, 70.20; H, 5.36; N, 7.44. Found: C, 69.89; H, 5.27; N, 7.25.
Example 28B 5 - { [3 -(benzyloxy)- 1 H-indazol- 1 -yl~[methv -2-furoic acid The product from Example 28 A (40 mg, 0.1 mmol) in EtOH (5 mL) was freated with IN NaOH (0.25 mL, 0.25 mmol) at room temperature. After stirring for 2 hours, the mixture was freated with water (10 mL), acidified with 10% citric acid to pH 3, exfracted with EtOAc and concenfrated under reduced pressure to provide 35 mg (~99%) of title compound. 1H NMR (300 MHz, DMSO-d6) δ 5.37 (s, 2H), 5.56 (s, 2H), 6.48 (d, J=3 Hz, IH), 7.08 (m, IH), 7.12 (d, J=3 Hz, IH), 7.38 (m, 4H), 7.51 (m, 2H), 7.62 (m, 2H), 13.05 (br s, IH); MS (APCI+) m/z 349 (M+H)+; Analysis calcd for C22H16N204: C, 68.96; H, 4.63; N, 8.04. Found: C, 68.69; H, 4.64; N, 7.93.
Example 29 (5-{ [3 -(benzyloxy 1 H-indazol- 1 -yl"jmethyl| -2-furyl)methanol
The product from Example 28A (113 mg, 0.3 mmol) and NaBE ; (38 mg, 1 mmol) in THF (15 mL) were freated with MeOH dropwise at 50 °C. After stirring at 50 °C for 15 minutes, the mixture was allowed to cool to room temperature and then freated with 10% Citric acid and extracted with EtOAc. The extract was washed with water, brine, dried with anhydrous MgS04, filtered and the filtrate concentrated under reduced pressure. The residue was purified by chromatography (silica gel, 1 : 1 hexanes:EtOAc) to afford 90 mg (89%) of the title compound, mp 80-82 °C; 1H NMR (300 MHz, DMSO-d6) δ 4.30 (d, J=6 Hz, 2H), 5.14 (t, J=6 Hz, IH), 5.38 (s, 2H), 5.43(s, 2H), 6.20 (d, J=3 Hz, IH), 6.30 (d, J=3 Hz, IH), 7.05 (t, J=8 Hz, IH), 7.38 (m, 4H), 7.52 (m, 2H), 7.60 (m, 2H); MS (APCI+) m/z 335 (M+H)+; Analysis calcd for C2oHι8N203: C, 71.84; H, 5.43; N, 8.38. Found: C, 71.74; H, 5.42; N, 8.32.
Example 30 3-(benzyloxy -l-({5- f4-methyl-l-piperazinyDcarbonyll-2-furyl}methyl)-lH-indazole The product from Example 28B (348 mg, 1 mmol), HOBt (135 mg. 1 mmol), 1- methylpiperazine (150 mg, 1.5 mmol) and EDCI (290 mg, 1.5 mmol) in CH2θ2 (30 mL) were stfrred at room temperature for 12 hours. The mixture was washed with water, brine, dried with MgS04, filtered and the filfrate concentrated under reduced pressure. The residue was purified by column chromatography (silica gel, EtOAc :MeOH 4:1, plus 1% Et3N) to provide 350 mg (80%) of the title compound. !H NMR (300 MHz, DMSO-D6) δ 2.12 (s, 3H), 2.18 (s, 4H), 3.45 (t, 4H), 5.37 (s, 2H), 5.55 (s, 2H), 6.5 (d, J=3Hz, IH), 6.9 (d, J=3Hz, IH), 7.09 (t, J=7.5Hz, IH), 7.38 (m, 4H), 7.5 (dd, J=6Hz, 2H), 7.55 (dd, J=9Hz, 2H); MS (DCI-NH3) m/z 431.2 (M + H)+; FAB-Exact mass calcd for C25H27N403 (M+H)+ 431.2083; Found 431.2080.
Example 31 [" 1 -(5- { [3 -(benzyloxy)- 1 H-indazol- 1 -yllmethyl} -2-furoyl)-2-pyrrolidinyl1methanol
The product from Example 28B and 2-pyrrolidinylmethanol were processed according to the procedure described in Example 30 to provide the title compound. Η NMR (300 MHz, DMSO-D6) δ 1.8 (m, 4H), 3.44 (m, 3H), 4.05 (m, IH), 4.72 (t, J=6Hz, IH), 5.37 (s, 2H), 5.55 (s, 2H), 6.5 (d, J=3Hz, IH), 6.9 (d, J=3Hz, IH), 7.09 (t, J=7.5Hz, IH), 7.38 (m, 4H), 7.5 (dd, J=6Hz, 2H), 7.55 (dd, J=9Hz, 2H); MS (DCI-NH3) m/z 432(M+H)+.
Example 32 5-| 3-(berrzyloxy -lH-mdazol-l-yl1methyl}-N-r3-(dimethylamino)propyll-2-furamide The product from Example 28B and N,N-dimethyl- 1 ,3-propanediamine were processed according to the procedure described in Example 30 to provide the title compound. !H NMR (300 MHz, DMSO-D6) δ 1.59 (m, 2H), 2.1 (s, 6H), 2.22 (t, J=6 Hz, 2H), 3.20 (m, 2H), 5.37 (s, 2H), 5.55 (s, 2H), 6.5 (d, J=3Hz, IH), 6.9 (d, J=3Hz, IH), 7.09 (t, J=7.5Hz, IH), 7.38 (m, 4H), 7.5 (dd, J=6Hz, 2H), 7.55 (dd, J=9Hz, 2H), MS (DCI- H3) m/z 433 (M+H)+.
Example 33 5 - { [3 -(benzyloxy)- 1 H-indazol- 1 -yllmethyl} -N-(4-hvdroxycvclohexylV2-furamide The product from Example 28B and 4-aminocyclohexanol were processed according to the procedure described in Example 30 to provide the title compound. !H NMR (300 MHz, DMSO-D6) δ 1.25 (m, 4H), 1.79 (m, 4H), 3.35 (m, 2H), 3.61 (m, IH), 4.53 (d, J=4.5 Hz, IH), 5.39 (s, 2H), 5.55 (s, 2H), 6.35 (d, J=3Hz, IH), 7.02 (d, J=3Hz, IH), 7.09 (t, J=7.5Hz, IH), 7.38 (m, 4H), 7.5 (dd, J=6Hz, 2H), 7.65 (dd, J=9Hz, 2H), 7.90 (d, J=9Hz, IH); MS (DCI-NH3) m/z 446 (M+H)+.
Example 34 l-(2-fluoiObenzyl -3- (5-nitro-2-pyridmyl)oxyl-lH-pyrazolor3,4-b1pyridine
Example 34A methyl 2-chloronicotinate 2-Chloronicotinic acid (4.73 g, 30 mmol) was dissolved in methanol (100 mL) and freated with concenfrated H2S04 (2.5 mL). The mixture was refluxed for 4 hours, allowed to cool to room temperature, and concenfrated under reduced pressure. The residue was partitioned between a saturated solution of NaHC03 and ethyl acetate. The ethyl acetate layer was separated, washed with water, brine, dried over anhydrous MgS04, filtered, and the filtrate was concenfrated under reduced pressure to provide the title compound. MS (DCI/NH3) m/z 172 (M+H)+.
Example 34B 1 H-pyrazolo]"3 „4-b1pyridm-3 -ol Methyl 2-chloronicotinate (5.1 g, -30 mmol), Cu (1 g), and hydrazine hydrate were combined in pyridine (100 mL) and refluxed for 10 hours. The mixture was allowed to cool to room temperature and concenfrated under reduced pressure. The residue was filtered through a short silica gel column (CH2Cl2:MeOH 3:1) to provide the title compound. MS (DCI NH3) m/z 136 (M+H)+.
Example 34C l-(2-fluorobenzyl)-3-[(2-fluorobenzyl)oxy]-lH-pyrazolo[3,4-b1pyridine lH-Pyrazolo[3,4-b]pyridin-3-ol (4 g, -29 mmol) in DMSO (25 mL) was freated with solid NaOH ( 2 g, 50 mmol) and 2-fluorobenzyl chloride (6.3 mL, 35 mmol) at room temperature for 18 hours. The mixture was then poured into H2O and exfracted with ethyl acetate. The acetate layer was washed with water, brine, dried over anhydrous MgS0 , filtered, and the filtrate was concenfrated under reduced pressure. The residue was purified by column chromatography (EtOAc as eluent) to provide the title compound, mp 57-58 °C. !H NMR (300 MHz, DMSO-d6) δ 4.43 (s, 2H), 5.07 (s, 2H), 7.17 (m, 6H), 7.33 (m, IH), 7.45 (m, IH), 7.60 (m, IH), 8.17 (d-d, J=6 Hz and 3 Hz, IH), 8.55 (d-d, J=6 Hz and 3 Hz, IH); MS (DCI/NH3) m z 352 (M+H)+. Anal, calcd for C2oH15F2N30: C, 68.37; H, 4.30; N, 11.96. Found: C, 68.26; H, 4.28; N, 11.73. Example 34D 1 -(2-fluorobenzyl - 1 H-pyrazolo [3 ,4-b1pyridin-3 -ol l-(2-Fluorobenzyl)-3-[(2-fluorobenzyl)oxy]-lH-pyrazolo[3,4-b]pyridine (2.46 g, 7 mmol) was suspended in acetic acid (5 mL) and freated with 32% HBr in acetic acid (10 mL). The mixture was stined at room temperature for 2 hours, poured into icy water (25 mL), and freated with solid NaHC03 to pH 5. The mixture was filtered and the filter cake was washed with cold water and dried under reduced pressure to provide the title compound. *H NMR (300 MHz, DMSO-d6) δ 5.47 (s, 2H), 7.10 (m, 3H), 7.20 (m, IH), 7.33 (m, IH), 8.11(d-d, J=6 Hz and 3 Hz, IH), 8.47 (d-d, J=6 Hz and 3 Hz, IH), 11.35 (broad s, IH); MS (DCI/NH3) m/z 244 (M+H)+.
Example 34E l-(2-fluorobenzyl)-3-r(5-nifro-2-pyridinyl)oxyl-lH-pyrazolor3,4-b1pyridine l-(2-Fluorobenzyl)-lH-pyrazolo[3,4-b]pyridin-3-ol (243 mg, 1 mmol), 2-chloro-5- nifropyridine (238 mg, 1.5 mmol), anhydrous K2C03, Cul (10 mg), and Cu (10 mg) were combined in DMF (10 mL) and refluxed for 10 hours. The mixture was poured into water and extracted with ethyl acetate. The acetate layer was washed with water, brine, dried over anhydrous MgS04, filtered, and the filtrate was concentrated under reduced pressure. The residue was purified by chromatography (hexanes: ethyl acetate 1 :1) to provide the title compound, mp 111-113 °C. *H NMR (300 MHz, DMSO-d6) δ 5.70 (s, 2H), 7.20 (m, 4H), 7.35 (m, IH), 7.50 (d, J=9 Hz, IH), 8.00 (d-d, J=9 Hz and 2 Hz, IH), 8.66 (d-d, J=6 Hz and 2 Hz, IH), 8.73 (d-d, J=9 Hz and 3 Hz, IH), 9.02 (d, J=3 Hz, IH); MS (DCI/NH3) m/z 366 (M+H)+. Anal, calcd for Cι8Hι2FN503: C, 59.18; H, 3.31; N, 19.17. Found: C, 58.21; H, 3.15; N, 19.33.
Example 35 l-(2-fluorobenzyl -3-[ 3-nifro-2-pyridinyl)oxy1-lH-pyrazolo 3,4-blpyridine The product from Example 34D and 2-chloro-3 -nifropyridine were processed according to the procedure described in Example 34E to provide the title compound, mp 115-117 °C. !H NMR (300 MHz, DMSO-d6) δ 5.70 (s, 2H), 7.20 (m, 4H), 7.37 (m, IH), 7.47 (d-d, J=9 Hz and 4 Hz, IH), 8.03 (d-d, J=9 Hz and 2 Hz, IH), 8.40 (d-d, J=6 Hz and 2 Hz, IH), 8.66 (m, 2H); MS (DCI/NH3) m/z 366 (M+H)+. Anal, calcd for
C18Hi2FN5O3.0.3H2O: C, 58.32; H, 3.43; N, 18.89. Found: C, 58.19; H, 3.34; N, 19.14.
Guanylate Cyclase Assay Sf9 cells were cultured in Sf-900II medium supplemented with 10% (v/v) fetal calf serum at 28 °C to give a count of 6 x 105 cells/ml. The cells were then infected with a mixture of the virus stocks for the αl and βl subunits of guanylate cyclase at a multiplicity of infection of 0.1 pfu/cell. The cells were harvested 72 hours after infection and were pelleted by centrifugation. The resulting cell pellets were homogenized with Polyteon homogenizer in 3 volumes of 20 mM Tris-HCl (pH 7.6) containing 1 mM EDTA, 5 mM dithiothreitol, 90 mM NaCl, 10% glycerol, and protease inhibitors mix (Roche Molecular Biochemicals). The homogenate was centrifuged at 50,000 x g for 60 minutes and the supernatant was aliquotted and stored at -80 °C.
Compounds of the present invention were dissolved in DMSO to make 100 mM and saved as stocks at -20 °C. When compounds were tested, 10-fold concentrated solutions with 10%) DMSO were prepared. 10 μl of 10-fold concenfrated compound solutions were added to the reaction mixture total of 100 μl.
Guanylate cyclase activity was measured by the formation of cyclic GMP from GTP in a total volume of 100 μl. Guanylate cyclase-expressed Sf9 cell high-speed supernatant (Sf9 high-speed sup) was used as an enzyme source for the assay. The reaction mixture containing 0.1 μl enzyme of Sf9 high-speed sup, compound solution, 50 mM Tris-HCl (pH 7.6), 4 mM MgCl2, 0.5 mM IBMX, 15 mM creatine phosphate, 20 μg creatine phosphokinase, 0.1% BSA and 1 mM GTP were incubated at 37 °C for 15 minutes. After the reaction, 0.9 ml of 50 mM sodium acetate buffer (pH 5.8) was added followed by boiling for 3 minutes to stop the reaction. The solution was centrifuged at 3000 ipm for 15 minutes at room temperature and cyclic GMP in 20 μl of the resulting supernatant was measured according to the protocol of Amersham cyclic GMP enzymeimmunoassay system (Amersham, RPN 226).
Compounds of the present invention were tested at 100 μM with and without 1 μM of sodium nifroprusside (SNP). YC-1 was included as a standard for each assay. The data was normalized with the activity of 100 μM YC-1 (without SNP) as 100%. Mean basal efficacy, in Table 1, was expressed as a percentage of 100 μM YC-1 (without SNP). The mean activation, in Table 1, was calculated based on the formula: (activity of compound of the present invention at 100 μM with 1 μM SNP) - (activity of compound of the present invention at 100 μM) / (activity of SNP at 1 μM) - (basal activity of sGC).
Table 1
Figure imgf000045_0001
Figure imgf000046_0001
The data in Table 1 indicates that compounds of the present invention potentiate the activation of sGC by nitric oxide resulting in increased levels of cGMP. Activation of sGC by allosteric activators or non NO-donors potentiates the effect of NO released during sexual stimulation increasing cGMP. Therefore, compounds of the present invention are useful for sexual dysfunction in mammals including male erectile dysfunction. Compounds of the present invention can be used in combination with phosphodiesterase 5 inhibitors including, but not limited to, sildenafil or vardenafil as a method of treating sexual dysfunction in a mammal.
Compounds of the present invention can be used in combination with an adrenergic receptor antagonist including, but not limited to, terazosin, prazosin or tamsulosin as a method of treating sexual dysfunction in a mammal.
Compounds of the present invention can be used in combination with a dopamine agonist including, but not limited to, apomoφhine as a method of treating sexual dysfunction in a mammal. Compounds of the present invention can be useful for disorders associated with low levels of cGMP such as cardiovascular disease, atherosclerosis, angina pectoris, diastolic dysfunction, benign prostatic hypeφlasia (BPH), incontinence, sexual dysfunction, endothelial dysfunction, frombosis, diabetes, liver cirhosis, cognitive disorders, Alzheimer's disease, anxiety, stress, depression, sleep disorders, migraine, cerebral ischemia, brain frauma, pain, memory and learning disorders as discussed in S. Moncada, E. A. Higgs, FASEB J., 9(13), 1319-1330 (1995); I. S. Severina, Biochemistry (Mosc), 63(7), 794-801 (1998); Y-C. Lee, E. Martin, F. Murad, PNAS, 97(20), 10763-10768 (2000); A. J. Hobbs, TIPS, 18, 484-491 (1997); F. Murad, Adv. Pharmacol., 26, 1-335 (1994); and J. W. Denninger, M. A. Marietta, Biochim. Biophys. Acta, 1411, 334-350 (1999).
The term "pharmaceutically acceptable carrier," as used herein, means a non-toxic, inert solid, semi-solid or liquid filler, diluent, encapsulating material or formulation auxiliary of any type. Some examples of materials which can serve as pharmaceutically acceptable earners are sugars such as lactose, glucose and sucrose; starches such as corn starch and potato starch; cellulose and its derivatives such as sodium carboxymethyl cellulose, ethyl cellulose and cellulose acetate; powdered fragacanth; malt; gelatin; talc; excipients such as cocoa butter and suppository waxes; oils such as peanut oil, cottonseed oil, safflower oil, sesame oil, olive oil, corn oil and soybean oil; glycols; such a propylene glycol; esters such as ethyl oleate and ethyl laurate; agar; buffering agents such as magnesium hydroxide and aluminum hydroxide; alginic acid; pyrogen-free water; isotonic saline; Ringer's solution; ethyl alcohol, and phosphate buffer solutions, as well as other non- toxic compatible lubricants such as sodium lauryl sulfate and magnesium stearate, as well as coloring agents, releasing agents, coating agents, sweetening, flavoring and perfuming agents, preservatives and antioxidants can also be present in the composition, according to the judgment of the formulator. The present invention provides pharmaceutical compositions which comprise compounds of the present invention formulated together with one or more non-toxic pharmaceutically acceptable carriers. The pharmaceutical compositions can be formulated for oral administration in solid or liquid form, for parenteral injection or for rectal adminisfration.
Dosage forms for topical adminisfration of a compound of the present invention include powders, sprays, ointments and inhalants. The active compound is mixed under sterile conditions with a pharmaceutically acceptable carrier and any needed preservatives, buffers or propellants which can be required. Opthalmic formulations, eye ointments, powders and solutions are also contemplated as being within the scope of this invention.
Actual dosage levels of active ingredients in the pharmaceutical compositions of this invention can be varied so as to obtain an amount of the active compound(s) which is effective to achieve the desired therapeutic response for a particular patient, compositions, and mode of administration. The selected dosage level will depend upon the activity of the particular compound, the route of administration, the severity of the condition being treated, and the condition and prior medical history of the patient being freated.
When used in the above or other treatments, a therapeutically effective amount of one of the compounds of the present invention can be employed in pure form or, where such forms exist, in pharmaceutically acceptable salt, ester, amide, or prodrug form. Alternatively, the compound can be administered as a pharmaceutical composition containing the compound of interest in combination with one or more pharmaceutically acceptable carriers. The phrase "therapeutically effective amount" of the compound of the present invention means a sufficient amount of the compound to treat disorders, at a reasonable benefit/risk ratio applicable to any medical treatment. The specific therapeutically effective dose level for any particular patient will depend upon a variety of factors including the disorder being freated and the severity of the disorder; activity of the specific compound employed; the specific composition employed; the age, body weight, general health, sex and diet of the patient; the time of adminisfration, route of adminisfration, and rate of excretion of the specific compound employed; the duration of the treatment; drugs used in combination or coincidental with the specific compound employed; and like factors well known in the medical arts.
The total daily dose of the compounds of the present invention administered to a mammal, and particularly a human, may range from about 0.003 to about 100 mg/kg/day. For puφoses of oral administration, more preferable doses can be in the range of from about 0.01 to about 10 mg/kg/day. If desired, the effective daily dose can be divided into multiple doses for puφoses of administration; consequently, single dose compositions may contain such amounts or submultiples thereof to make up the daily dose. The present invention also provides pharmaceutical compositions that comprise compounds of the present invention formulated together with one or more non-toxic pharmaceutically acceptable carriers. The pharmaceutical compositions can be specially formulated for oral administration in solid or liquid form, for parenteral injection or for rectal administration. The pharmaceutical compositions of this invention can be administered to humans and other mammals orally, rectally, parenterally, intracisternally, infravaginally, intraperitoneally, topically (as by powders, ointments or drops), bucally or as an oral or nasal spray. The term "parenterally," as used herein, refers to modes of administration which include intravenous, intramuscular, infraperitoneal, infrasternal, subcutaneous and infraarticular inj ection and infusion.
Pharmaceutical compositions of this invention for parenteral injection comprise pharmaceutically acceptable sterile aqueous or nonaqueous solutions, dispersions, suspensions or emulsions as well as sterile powders for reconstitution into sterile injectable solutions or dispersions just prior to use. Examples of suitable aqueous and nonaqueous carriers, diluents, solvents or vehicles include water, ethanol, polyols (such as glycerol, propylene glycol, polyethylene glycol and the like), vegetable oils (such as olive oil), injectable organic esters (such as ethyl oleate) and suitable mixtures thereof. Proper fluidity can be maintained, for example, by the use of coating materials such as lecithin, by the maintenance of the required particle size in the case of dispersions and by the use of surfactants.
These compositions may also contain adjuvants such as preservatives, wetting agents, emulsifying agents and dispersing agents. Prevention of the action of microorganisms can be ensured by the inclusion of various antibacterial and antifungal agents, for example, paraben, chlorobutanol, phenol sorbic acid and the like. It may also be desirable to include isotonic agents such as sugars, sodium chloride and the like. Prolonged absoφtion of the injectable pharmaceutical form can be brought about by the inclusion of agents which delay absoφtion such as aluminum monostearate and gelatin. In some cases, in order to prolong the effect of the drug, it is desirable to slow the absoφtion of the drug from subcutaneous or intramuscular injection. This can be accomplished by the use of a liquid suspension of crystalline or amoφhous material with poor water solubility. The rate of absoφtion of the drug then depends upon its rate of dissolution which, in turn, may depend upon crystal size and crystalline form. Alternatively, delayed absoφtion of a parenterally administered drug form is accomplished by dissolving or suspending the drug in an oil vehicle.
Injectable depot forms are made by forming microencapsule matrices of the drug in biodegradable polymers such as polylactide-polyglycolide. Depending upon the ratio of drug to polymer and the nature of the particular polymer employed, the rate of drug release can be controlled. Examples of other biodegradable polymers include poly(orthoesters) and poly(anhydrides). Depot injectable formulations are also prepared by entrapping the drug in liposomes or microemulsions which are compatible with body tissues.
The injectable formulations can be sterilized, for example, by filtration through a bacterial-retaining filter or by incoφorating sterilizing agents in the form of sterile solid compositions which can be dissolved or dispersed in sterile water or other sterile injectable medium just prior to use.
Solid dosage forms for oral adminisfration include capsules, tablets, pills, powders and granules. In such solid dosage forms, the active compound may be mixed with at least one inert, pharmaceutically acceptable excipient or carrier, such as sodium citrate or dicalcium phosphate and/or a) fillers or extenders such as starches, lactose, sucrose, glucose, mannitol and silicic acid; b) binders such as carboxymethylcellulose, alginates, gelatin, polyvinylpynolidone, sucrose and acacia; c) humectants such as glycerol; d) disintegrating agents such as agar-agar, calcium carbonate, potato or tapioca starch, alginic acid, certain silicates and sodium carbonate; e) solution retarding agents such as paraffin; f) absoφtion accelerators such as quaternary ammonium compounds; g) wetting agents such as cetyl alcohol and glycerol monostearate; h) absorbents such as kaolin and bentonite clay and i) lubricants such as talc, calcium stearate, magnesium stearate, solid polyethylene glycols, sodium lauryl sulfate and mixtures thereof. In the case of capsules, tablets and pills, the dosage form may also comprise buffering agents.
Solid compositions of a similar type may also be employed as fillers in soft and hard-filled gelatin capsules using such excipients as lactose or milk sugar as well as high molecular weight polyethylene glycols and the like. The solid dosage forms of tablets, dragees, capsules, pills and granules can be prepared with coatings and shells such as enteric coatings and other coatings well-known in the pharmaceutical formulating art. They may optionally contain opacifying agents and may also be of a composition such that they release the active ingredient(s) only, or preferentially, in a certain part of the intestinal tract, optionally, in a delayed manner. Examples of embedding compositions which can be used include polymeric substances and waxes.
The active compounds can also be in micro-encapsulated form, if appropriate, with one or more of the above-mentioned excipients.
Liquid dosage forms for oral administration include pharmaceutically acceptable emulsions, solutions, suspensions, syrups and elixirs. In addition to the active compounds, the liquid dosage forms may contain inert diluents commonly used in the art such as, for example, water or other solvents, solubilizing agents and emulsifiers such as ethyl alcohol, isopropyl alcohol, ethyl carbonate, ethyl acetate, benzyl alcohol, benzyl benzoate, propylene glycol, 1,3-butylene glycol, dimethyl formamide, oils (in particular, cottonseed, groundnut, com, germ, olive, castor and sesame oils), glycerol, tefrahydrofurfuryl alcohol, polyethylene glycols and fatty acid esters of sorbitan and mixtures thereof.
Besides inert diluents, the oral compositions may also include adjuvants such as wetting agents, emulsifying and suspending agents, sweetening, flavoring and perfuming agents.
Suspensions, in addition to the active compounds, may contain suspending agents as, for example, ethoxylated isostearyl alcohols, polyoxyethylene sorbitol and sorbitan esters, microcrystalline cellulose, aluminum metahydroxide, bentonite, agar-agar, fragacanth and mixtures thereof.
Compositions for rectal or vaginal administration are preferably suppositories which can be prepared by mixing the compounds of the present invention with suitable non- irritating excipients or carriers such as cocoa butter, polyethylene glycol or a suppository wax which are solid at room temperature but liquid at body temperature and therefore melt in the rectum or vaginal cavity and release the active compound.
Compounds of the present invention can also be administered in the fomi of liposomes. As is known in the art, liposomes are generally derived from phospholipids or other lipid substances. Liposomes are formed by mono- or multi-lamellar hydrated liquid crystals which are dispersed in an aqueous medium. Any non-toxic, physiologically acceptable and metabolizable lipid capable of forming liposomes can be used. The present compositions in liposome form can contain, in addition to a compound of the present invention, stabilizers, preservatives, excipients and the like. The preferred lipids are natural and synthetic phospholipids and phosphatidyl cholines (lecithins) used separately or together. Methods to form liposomes are known in the art. See, for example, Prescott, Ed.,
Methods in Cell Biology, Volume XTV, Academic Press, New York, N.Y. (1976), p. 33 et seq.
The present invention contemplates pharmaceutically active compounds either chemically synthesized or fomied by in vivo biofransformation of a prodrug, ester, or amide to compounds of formula I.
The compounds of the invention can exist in unsolvated as well as solvated forms, including hydrated forms, such as hemi-hydrates. In general, the solvated forms, with pharmaceutically acceptable solvents such as water and ethanol among others are equivalent to the unsolvated forms for the puφoses of the invention. The term "pharmaceutically acceptable salt, ester, amide, and prodrug," as used herein, refers to carboxylate salts, amino acid addition salts, zwitterions, esters, amides, and prodrugs of compounds of formula I which are within the scope of sound medical judgement, suitable for use in contact with the tissues of humans and lower animals without undue toxicity, irritation, allergic response, and the like, are commensurate with a reasonable benefit/risk ratio, and are effective for their intended use.
The compounds of the present invention can be used in the form of pharmaceutically acceptable salts derived from inorganic or organic acids. The term "pharmaceutically acceptable salt" means those salts which are, within the scope of sound medical judgement, suitable for use in contact with the tissues of humans and lower animals without undue toxicity, irritation, allergic response and the like and are commensurate with a reasonable benefit/risk ratio. Pharmaceutically acceptable salts are well-known in the art. The salts can be prepared in situ during the final isolation and purification of the compounds of the present invention or separately by reacting a free base function with a suitable organic acid. Representative acid addition salts include, but are not limited to acetate, adipate, alginate, citrate, aspartate, benzoate, benzenesulfonate, bisulfate, butyrate, camphorate, camphorsufonate, digluconate, glycerophosphate, hemisulfate, heptanoate, hexanoate, fumarate, hydrochloride, hydrobromide, hydroiodide, 2-hydroxyethansulfonate (isethionate), lactate, maleate, methanesulfonate, nicotinate, 2-naphthalenesulfonate, oxalate, pamoate, pectinate, persulfate, 3-phenylpropionate, picrate, pivalate, propionate, succinate, tartrate, thiocyanate, phosphate, glutamate, bicarbonate, p-toluenesulfonate and undecanoate. Also, the basic nitrogen-containing groups can be quatemized with such agents as lower alkyl halides such as methyl, ethyl, propyl, and butyl chlorides, bromides and iodides; dialkyl sulfates like dimethyl, diethyl, dibutyl and diamyl sulfates; long chain halides such as decyl, lauryl, myristyl and stearyl chlorides, bromides and iodides; arylalkyl halides like benzyl and phenethyl bromides and others. Water or oil-soluble or dispersible products are thereby obtained. Examples of acids which can be employed to form pharmaceutically acceptable acid addition salts include such inorganic acids as hydrochloric acid, hydrobromic acid, sulphuric acid and phosphoric acid and such organic acids as maleic acid, fumaric acid, succinic acid and citric acid.
Basic addition salts can be prepared in situ during the final isolation and purification of compounds of this invention by reacting a carboxylic acid-containing moiety with a suitable base such as the hydroxide, carbonate or bicarbonate of a pharmaceutically acceptable metal cation or with ammonia or an organic primary, secondary or tertiary amine. Pharmaceutically acceptable salts include, but are not limited to, cations based on alkali metals or alkaline earth metals such as lithium, sodium, potassium, calcium, magnesium and aluminum salts and the like and nontoxic quatemary ammonia and amine cations including ammonium, tetramethylammonium, tefraethylammonium, methylamine, dimethylamine, trimethylamine, triethylamine, diethylamine, ethylamine and the like. Other representative organic amines useful for the fonnation of base addition salts include ethylenediamine, ethanolamine, diethanolamine, piperidine, piperazine and the like. Preferred salts of the compounds of the present invention include phosphate, tris and acetate.
The term "pharmaceutically acceptable prodrug" or "prodrug,"as used herein, represents those prodrugs of the compounds of the present invention which are, within the scope of sound medical judgement, suitable for use in contact with the tissues of humans and lower animals without undue toxicity, irritation, allergic response, and the like, commensurate with a reasonable benefit/risk ratio, and effective for their intended use. Prodrugs of the present invention may be rapidly transformed in vivo to compounds of formula I, for example, by hydrolysis in blood.
The term "pharmaceutically acceptable ester" or "ester," as used herein, refers to esters of compounds of the present invention which hydrolyze in vivo and include those that break down readily in the human body to leave the parent compound or a salt thereof. Examples of pharmaceutically acceptable, non-toxic esters of the present invention include Cι-to-C6 alkyl esters and C5-to-C7 cycloalkyl esters, although C1-to-C4 alkyl esters are prefened. Esters of the compounds of formula I may be prepared according to conventional methods.
The term "pharmaceutically acceptable amide" or "amide," as used herein, refers to non-toxic amides of the present invention derived from ammonia, primary Ci-to-Cβ alkyl amines and secondary Ci-to-Cβ dialkyl amines. In the case of secondary amines, the amine may also be in the form of a 5- or 6-membered heterocycle containing one nitrogen atom. Amides derived from ammonia, Cι-to-C3 alkyl primary amides and Cι-to-C2 dialkyl secondary amides are prefened. Amides of the compounds of formula I may be prepared according to conventional methods.

Claims

What is claimed is:
1. A compound of formula (I)
Figure imgf000054_0001
(I), or a pharmaceutically acceptable salt, ester, amide or prodrug thereof, wherein T, X, W, and Y are independently selected from the group consisting of C and N provided that at most, only two of T, X, W, and Y can be nitrogen at the same time; Z is selected from the group consisting of O, S and N(R7);
Ri is selected from the group consisting of aryl, arylalkenyl, arylalkyl, heterocycle, heterocyclealkenyl and heterocyclealkyl; R2 and i are independently selected from the group consisting of hydrogen, alkenyl, alkoxy, alkoxycarbonyl, alkyl, alkylcarbonyl, alkylcarbonyloxy, alkylthio, alkynyl, carboxy, cyano, formyl, halogen, haloalkoxy, haloalkyl, hydroxy, hydroxyalkyl, mercapto, nitro, -NZιZ2, (NZιZ2)carbonyl and (NZιZ2)sulfonyl wherein Zi and Z2 are independently selected from the group consisting of hydrogen, alkyl, alkylcarbonyl and formyl; R3 and R5 are independently absent or selected from the group consisting of hydrogen, alkenyl, alkoxy, alkoxycarbonyl, alkyl, alkylcarbonyl, alkylcarbonyloxy, alkylthio, alkynyl, carboxy, cyano, formyl, halogen, haloalkoxy, haloalkyl, hydroxy, hydroxyalkyl, mercapto, nifro, -NZιZ2, (NZιZ2)carbonyl and (NZιZ2)sulfonyl wherein Z\ and Z2 are independently selected from the group consisting of hydrogen, alkyl, alkylcarbonyl and formyl;
R6 is selected from the group consisting of aryl, arylalkenyl, arylalkyl, heterocycle, heterocyclealkenyl and heterocyclealkyl; and
R7 is selected from the group consisting of hydrogen and alkyl.
2. A compound according to claim 1 wherein T, X, W, and Y are C; Z is O; R1 is selected from the group consisting of aryl, arylalkyl and heterocycle; and R6 is selected from the group consisting of arylalkenyl, arylalkyl, heterocycle and heterocyclealkyl.
3. A compound according to claim 1 wherein T, X, W, and Y are C; Z is O;
Ri is heterocycle; and R6 is arylalkyl.
4. A compound according to claim 1 wherein T, X, W, and Y are C;
Z is O;
Ri is heterocycle selected from the group consisting of furyl, pyridinyl and pyrimidinyl wherein the heterocycle is substituted with 0, 1 or 2 substituents selected from the group consisting of carboxy, haloalkyl, hydroxyalkyl and (NRARβ)carbonyl wherein RA and RB are independently selected from the group consisting of hydrogen, arylhydroxyalkyl, heterocyclealkyl, hydroxyalkyl and (NZιZ2)alkyl;
R2, R3, Rt and R5 are hydrogen; and
R6 is phenylmethyl.
5. A compound according to claim 4 selected from the group consisting of
{5-[(l-benzyl-lH-indazol-3-yl)oxy]-2-furyl}methanol;
{6-[(l-benzyl-lH-indazol-3-yl)oxy]-2-pyridinyl}methanol;
5- [( 1 -benzyl- 1 H-indazol-3 -yl)oxy]-2-furoic acid;
5-[(l-benzyl-lH-indazol-3-yl)oxy]-N-[3-(dimethylamino)propyl]-2-furamide; 5 - [( 1 -benzyl- 1 H-indazol-3 -yl)oxy] -N-(4-hydroxybutyl)-2-furamide;
5-[(l-benzyl-lH-indazol-3-yl)oxy]-N-[l-(hydroxymethyl)butyl]-2-furamide;
5-[( 1 -benzyl- 1 H-indazol-3 -yl)oxy]-N-(5-hydroxy- 1 ,5-dimethylhexyl)-2-furamide;
5 - [( 1 -benzyl- 1 H-indazol-3 -yl)oxy] -N-(2-hydroxy-2-phenylethyl)-2-furamide;
5-[(l-benzyl-lH-indazol-3-yl)oxy]-N-[2-(4-moφholinyl)ethyl]-2-furamide; 1 -benzyl-3 -(2-pyridinyloxy)- 1 H-indazole; l-benzyl-3-(2-pyrimidinyloxy)-lH-indazole;
1 -benzyl-3- {[5-(trifluoromethyl)-3-pyridmyl]oxy } -lH-indazole; and 2-[(l-benzyl-lH-indazol-3-yl)oxy]nicotinamide.
6. A compound according to claim 1 wherein T, X, W, and Y are C;
Z is O; Ri is aryl; and
R6 is arylalkyl.
7. A compound according to claim 1 wherein T, X, W, and Y are C; Z is O;
Ri is phenyl substituted with 0, 1, or 2 substituents selected from the group consisting of carboxy, heterocyclecarbonyl and (NRARβ)carbonyl wherein RA and RB are independently selected from the group consisting of hydrogen, aryl, arylhydroxyalkyl, cycloalkyl, cycloalkylalkyl, heterocycle, heterocyclealkyl, hydroxyalkyl and (NZιZ2)alkyl; R2, R , R4 and R5 are hydrogen; and
R6 is phenylmethyl.
8. A compound according to claim 7 selected from the group consisting of 2-[(l-benzyl-lH-indazol-3-yl)oxy]benzoic acid; 2-[(l-benzyl-lH-indazol-3-yl)oxy]-N-[2-(dimethylamino)ethyl]benzamide;
N-[3-(4-{2-[(l-benzyl-lH-indazol-3-yl)oxy]benzoyl}-l-piperazinyl)propyl]-N,N- dimethylamine;
2-[(l-benzyl-lH-indazol-3-yl)oxy]-N-[3-(dimethylamino)propyl]benzamide;
2-[( 1 -benzyl- 1 H-indazol-3-yl)oxy]-N-(4-hydroxycyclohexyl)benzamide; 2-[( 1 -benzyl- 1 H-indazol-3-yl)oxy]-N-[( 1 R,2R)- 1 -hydroxy-2,3 -dihydro- 1 H-inden-2- yl]benzamide;
2-[(l-benzyl-lH-indazol-3-yl)oxy]-N-[l-(hydroxymethyl)butyl]benzamide;
2- [( 1 -benzyl- 1 H-indazol-3 -yl)oxy] -N-(2-hydroxy-2-phenylethyl)benzamide;
2-[(l-benzyl-lH-indazol-3-yl)oxy]-N-[2-(l-methyl-2-pynolidinyl)ethyl]benzamide; 2- [( 1 -benzyl- 1 H-indazol-3 -yl)oxy]-N-[3 -(1 H-imidazol- 1 -yl)propyl]benzamide;
2-[(l-benzyl-lH-indazol-3-yl)oxy]-N'-(4-moφholinyl)benzohydrazide; and
2-[(l-benzyl-lH-indazol-3-yl)oxy]-N-[(2-hydroxycyclohexyl)methyl]benzamide.
9. A compound according to claim 1 wherein T, X, W, and Y are C;
Z is O;
Ri is arylalkyl; and R6 is arylalkenyl.
10. A compound according to claim 1 wherein T, X, W, and Y are C;
Z is O; Ri is phenylmethyl;
R2, R3, R-j and R5 are hydrogen; and
R6 is arylalkenyl wherein the aryl is phenyl.
11. A compound according to claim 10 that is 3 -(benzyloxy)- 1 -[3 -phenyl-2-propenyl]- lH-indazole.
12. A compound according to claim 1 wherein T, X, W, and Y are C;
Z is O; Rj is arylalkyl; and
R6 is heterocyclealkyl.
13. A compound according to claim 1 wherein T, X, W, and Y are C; Z is O;
Ri is phenylmethyl; R2, R3, R4 and R5 are hydrogen; and
Re is furylmethyl wherein the furyl is substituted with 0, 1 or 2 substituents selected from the group consisting of carboxy, heterocyclecarbonyl, hydroxyalkyl and (NRARβ)carbonyl wherein RA and RB are independently selected from the group consisting of hydrogen, cycloalkyl and (NZιZ2)alkyl.
14. A compound according to claim 13 selected from the group consisting of 5- { [3 -(benzyloxy)- 1 H-indazol- 1 -yljmethyl } -2-furoic acid; (5- { [3 -(benzyloxy)- 1 H-indazol- 1 -yljmethyl} -2-furyl)methanol; 3-(benzyloxy)-l-({5-[(4-methyl-l-piperazinyl)carbonyl]-2-furyl}methyl)-lH- indazole; [ 1 -(5- { [3 -(benzyloxy)- 1 H-indazol- 1 -yljmethyl} -2-furoyl)-2-pyrrolidinylJmethanol;
5-{[3-(benzyloxy)-lH-indazol-l-ylJmethyl}-N-[3-(dimethylamino)propyl]-2- furamide; and
5- { [3-(benzyloxy)- 1 H-indazol- 1 -yljmethyl} -N-(4-hydroxycyclohexyl)-2-furamide .
15. A compound according to claim 1 wherein
T, X, and W are C;
Y is N;
Z is O;
Ri is selected from the group consisting of aryl, arylalkyl and heterocycle; R5 is absent; and
R6 is selected from the group consisting of arylalkenyl, arylalkyl, heterocycle, and heterocyclealkyl.
16. A compound according to claim 1 wherein T, X, and W are C;
Y is N; Z is O;
Ri is heterocycle; R5 is absent; and R6 is arylalkyl.
17. A compound according to claim 1 wherein T, X, and W are C;
Y is N; Z is O;
Rx is heterocycle selected from the group consisting of furyl, pyridinyl and pyrimidinyl wherein the heterocycle is substituted with 0, 1 or 2 substituents selected from the group consisting of carboxy, haloalkyl, hydroxyalkyl and (NR B)carbonyl wherein RA and RB are independently selected from the group consisting of hydrogen, arylhydroxyalkyl, heterocyclealkyl, hydroxyalkyl and (NZιZ2)alkyl; R2, R3, and R are hydrogen; R5 is absent; and R6 is 2-fluorophenylmethyl.
18. The compound according to claim 1 wherein T, X, and W are C;
Y is N; Z is O;
Ri is pyridinyl substituted with nifro;
R2, R3, and R4 are hydrogen;
R5 is absent; and
Rδ is 2-fluorophenylmethyl.
19. The compound according to claim 18 selected from the group consisting of l-(2-fluorobenzyl)-3-[(5-nitro-2-pyridinyl)oxy]-lH-pyrazolo[3,4-b]pyridine; and 1 -(2-fluorobenzyl)-3 - [(3 -nitro-2-pyridinyl)oxy] - 1 H-pyrazolo [3 ,4-bJpyridine.
20. A method of treating a disorder ameliorated by increasing cGMP levels in a mammal comprising administering to the mammal a therapeutically effective amount of a compound of formula (I).
21. The method according to claim 20 wherein the disorder is selected from the group consisting of cardiovascular disease, atherosclerosis, angina pectoris, diastolic dysfunction, benign prostatic hypeφlasia (BPH), incontinence, endothelial dysfunction, trombosis, diabetes, liver cirhosis, cognitive disorders, Alzheimer's disease, anxiety, stress, depression, sleep disorders, migraine, cerebral ischemia, brain trauma, pain, memory and learning disorders.
22. The method according to claim 20 wherein the disorder is sexual dysfunction.
23. The method according to claim 22 wherein the sexual dysfunction is male erectile dysfunction.
24. A method of treating a disorder ameliorated by increasing cGMP levels in a mammal comprising administering to the mammal a therapeutically effective amount of a compound of formula (I) in combination with a pharmaceutically acceptable canier.
25. The method according to claim 24 wherein the disorder is selected from the group consisting of cardiovascular disease, atherosclerosis, angina pectoris, diastolic dysfunction, benign prostatic hypeφlasia (BPH), incontinence, endothelial dysfunction, trombosis, diabetes, liver cirhosis, cognitive disorders, Alzheimer's disease, anxiety, sfress, depression, sleep disorders, migraine, cerebral ischemia, brain frauma, pain, memory and learning disorders.
26. The method according to claim 24 wherein the disorder is sexual dysfunction.
27. The method according to claim 26 wherein the sexual dysfunction is male erectile dysfunction.
28. A method of treating a disorder ameliorated by increasing cGMP levels in a mammal comprising administering to the mammal a therapeutically effective amount of a compound of formula (I) in combination with a phosphodiesterase 5 inhibitor.
29. The method according to claim 28 wherein the disorder is selected from the group consisting of cardiovascular disease, atherosclerosis, angina pectoris, diastolic dysfunction, benign prostatic hypeφlasia (BPH), incontinence, endothelial dysfunction, trombosis, diabetes, liver cirhosis, cognitive disorders, Alzheimer's disease, anxiety, sfress, depression, sleep disorders, migraine, cerebral ischemia, brain trauma, pain, memory and learning disorders.
30. The method according to claim 28 wherein the disorder is sexual dysfunction.
31. The method according to claim 30 wherein the sexual dysfunction is male erectile dysfunction.
32. A method of treating a disorder ameliorated by increasing cGMP levels in a mammal comprising administering to the mammal a therapeutically effective amount of a compound of formula (I) in combination with an adrenergic receptor antagonist.
33. The method according to claim 32 wherein the disorder is selected from the group consisting of cardiovascular disease, atherosclerosis, angina pectoris, diastolic dysfunction, benign prostatic hypeφlasia (BPH), incontinence, endothelial dysfunction, frombosis, diabetes, liver cirhosis, cognitive disorders, Alzheimer's disease, anxiety, sfress, depression, sleep disorders, migraine, cerebral ischemia, brain frauma, pain, memory and learning disorders.
34. The method according to claim 32 wherein the disorder is sexual dysfunction.
35. The method according to claim 34 wherein the sexual dysfunction is male erectile dysfunction.
36. A method of treating a disorder ameliorated by increasing cGMP levels in a mammal comprising administering to the mammal a therapeutically effective amount of a compound of formula (I) in combination with a dopamine receptor agonist.
37. The method according to claim 36 wherein the disorder is selected from the group consisting of cardiovascular disease, atherosclerosis, angina pectoris, diastolic dysfunction, benign prostatic hypeφlasia (BPH), incontinence, endothelial dysfunction, frombosis, diabetes, liver cirhosis, cognitive disorders, Alzheimer's disease, anxiety, sfress, depression, sleep disorders, migraine, cerebral ischemia, brain trauma, pain, memory and learning disorders.
38. The method according to claim 36 wherein the disorder is sexual dysfunction.
39. The method according to claim 38 wherein the sexual dysfunction is male erectile dysfunction.
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