AU2001240670A1 - New aza-indolyl derivatives - Google Patents
New aza-indolyl derivativesInfo
- Publication number
- AU2001240670A1 AU2001240670A1 AU2001240670A AU2001240670A AU2001240670A1 AU 2001240670 A1 AU2001240670 A1 AU 2001240670A1 AU 2001240670 A AU2001240670 A AU 2001240670A AU 2001240670 A AU2001240670 A AU 2001240670A AU 2001240670 A1 AU2001240670 A1 AU 2001240670A1
- Authority
- AU
- Australia
- Prior art keywords
- compound according
- nitrogen
- compound
- disorders
- hydrogen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 125000005334 azaindolyl group Chemical group N1N=C(C2=CC=CC=C12)* 0.000 title description 3
- 150000001875 compounds Chemical class 0.000 claims description 125
- 239000000203 mixture Substances 0.000 claims description 51
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 45
- 238000000034 method Methods 0.000 claims description 40
- 229910052757 nitrogen Inorganic materials 0.000 claims description 34
- 238000011282 treatment Methods 0.000 claims description 30
- 125000000217 alkyl group Chemical group 0.000 claims description 28
- 239000001257 hydrogen Substances 0.000 claims description 27
- 229910052739 hydrogen Inorganic materials 0.000 claims description 27
- -1 alkylsulfoxyl Chemical group 0.000 claims description 25
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 24
- 208000008589 Obesity Diseases 0.000 claims description 22
- 235000020824 obesity Nutrition 0.000 claims description 22
- 229940086609 Lipase inhibitor Drugs 0.000 claims description 20
- AHLBNYSZXLDEJQ-FWEHEUNISA-N orlistat Chemical group CCCCCCCCCCC[C@H](OC(=O)[C@H](CC(C)C)NC=O)C[C@@H]1OC(=O)[C@H]1CCCCCC AHLBNYSZXLDEJQ-FWEHEUNISA-N 0.000 claims description 19
- 150000003839 salts Chemical class 0.000 claims description 18
- 229960001243 orlistat Drugs 0.000 claims description 17
- 229910052736 halogen Inorganic materials 0.000 claims description 16
- 150000002367 halogens Chemical group 0.000 claims description 16
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 claims description 15
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 13
- 125000003545 alkoxy group Chemical group 0.000 claims description 13
- 208000035475 disorder Diseases 0.000 claims description 12
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 12
- 125000003118 aryl group Chemical group 0.000 claims description 11
- 239000003814 drug Substances 0.000 claims description 11
- 125000004414 alkyl thio group Chemical group 0.000 claims description 10
- 239000008194 pharmaceutical composition Substances 0.000 claims description 10
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 8
- 238000011321 prophylaxis Methods 0.000 claims description 8
- 125000004390 alkyl sulfonyl group Chemical group 0.000 claims description 7
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 125000004104 aryloxy group Chemical group 0.000 claims description 6
- UTLBGXQIQOXKNB-SECBINFHSA-N (2r)-1-(7,8-dihydro-6h-pyrido[4,3-b]pyrrolizin-5-yl)propan-2-amine Chemical compound C12=CN=CC=C2C(C[C@H](N)C)=C2N1CCC2 UTLBGXQIQOXKNB-SECBINFHSA-N 0.000 claims description 5
- MBVFRSJFKMJRHA-UHFFFAOYSA-N 4-fluoro-1-benzofuran-7-carbaldehyde Chemical group FC1=CC=C(C=O)C2=C1C=CO2 MBVFRSJFKMJRHA-UHFFFAOYSA-N 0.000 claims description 5
- 210000003169 central nervous system Anatomy 0.000 claims description 5
- 239000003937 drug carrier Substances 0.000 claims description 5
- 239000000546 pharmaceutical excipient Substances 0.000 claims description 5
- 238000002560 therapeutic procedure Methods 0.000 claims description 5
- HVHVXSNVYIVPKS-SECBINFHSA-N (2r)-1-(7,8-dihydro-6h-pyrido[3,4-b]pyrrolizin-5-yl)propan-2-amine Chemical compound C12=CC=NC=C2C(C[C@H](N)C)=C2N1CCC2 HVHVXSNVYIVPKS-SECBINFHSA-N 0.000 claims description 4
- HVHVXSNVYIVPKS-VIFPVBQESA-N (2s)-1-(7,8-dihydro-6h-pyrido[3,4-b]pyrrolizin-5-yl)propan-2-amine Chemical compound C12=CC=NC=C2C(C[C@@H](N)C)=C2N1CCC2 HVHVXSNVYIVPKS-VIFPVBQESA-N 0.000 claims description 4
- UTLBGXQIQOXKNB-VIFPVBQESA-N (2s)-1-(7,8-dihydro-6h-pyrido[4,3-b]pyrrolizin-5-yl)propan-2-amine Chemical compound C12=CN=CC=C2C(C[C@@H](N)C)=C2N1CCC2 UTLBGXQIQOXKNB-VIFPVBQESA-N 0.000 claims description 4
- OJPWHBUVOKMINF-UHFFFAOYSA-N 2-(7,8-dihydro-6h-pyrido[3,4-b]pyrrolizin-5-yl)ethanamine Chemical compound C12=CC=NC=C2C(CCN)=C2N1CCC2 OJPWHBUVOKMINF-UHFFFAOYSA-N 0.000 claims description 4
- 206010000117 Abnormal behaviour Diseases 0.000 claims description 4
- 208000024172 Cardiovascular disease Diseases 0.000 claims description 4
- 208000002193 Pain Diseases 0.000 claims description 4
- 125000004448 alkyl carbonyl group Chemical group 0.000 claims description 4
- 125000003710 aryl alkyl group Chemical group 0.000 claims description 4
- 125000005129 aryl carbonyl group Chemical group 0.000 claims description 4
- 125000004391 aryl sulfonyl group Chemical group 0.000 claims description 4
- 125000005110 aryl thio group Chemical group 0.000 claims description 4
- 125000003917 carbamoyl group Chemical group [H]N([H])C(*)=O 0.000 claims description 4
- 208000015114 central nervous system disease Diseases 0.000 claims description 4
- 125000004093 cyano group Chemical group *C#N 0.000 claims description 4
- 229940079593 drug Drugs 0.000 claims description 4
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 claims description 4
- 230000002265 prevention Effects 0.000 claims description 4
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims description 4
- 239000000651 prodrug Substances 0.000 claims description 4
- 229940002612 prodrug Drugs 0.000 claims description 4
- 230000009467 reduction Effects 0.000 claims description 4
- 238000006722 reduction reaction Methods 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 208000018522 Gastrointestinal disease Diseases 0.000 claims description 3
- 125000004663 dialkyl amino group Chemical group 0.000 claims description 3
- 125000004473 dialkylaminocarbonyl group Chemical group 0.000 claims description 3
- 125000005202 dialkylaminocarbonyloxy group Chemical group 0.000 claims description 3
- 230000001524 infective effect Effects 0.000 claims description 3
- 238000005932 reductive alkylation reaction Methods 0.000 claims description 3
- 231100000331 toxic Toxicity 0.000 claims description 3
- 230000002588 toxic effect Effects 0.000 claims description 3
- 208000007848 Alcoholism Diseases 0.000 claims description 2
- 208000000103 Anorexia Nervosa Diseases 0.000 claims description 2
- 208000019901 Anxiety disease Diseases 0.000 claims description 2
- 208000020925 Bipolar disease Diseases 0.000 claims description 2
- 208000032841 Bulimia Diseases 0.000 claims description 2
- 206010006550 Bulimia nervosa Diseases 0.000 claims description 2
- 206010008874 Chronic Fatigue Syndrome Diseases 0.000 claims description 2
- 206010012289 Dementia Diseases 0.000 claims description 2
- 208000026139 Memory disease Diseases 0.000 claims description 2
- 201000009906 Meningitis Diseases 0.000 claims description 2
- 208000019695 Migraine disease Diseases 0.000 claims description 2
- 208000027626 Neurocognitive disease Diseases 0.000 claims description 2
- 208000021384 Obsessive-Compulsive disease Diseases 0.000 claims description 2
- 206010036618 Premenstrual syndrome Diseases 0.000 claims description 2
- 208000028017 Psychotic disease Diseases 0.000 claims description 2
- 201000001880 Sexual dysfunction Diseases 0.000 claims description 2
- 206010041250 Social phobia Diseases 0.000 claims description 2
- 208000006011 Stroke Diseases 0.000 claims description 2
- 208000007536 Thrombosis Diseases 0.000 claims description 2
- 102100026383 Vasopressin-neurophysin 2-copeptin Human genes 0.000 claims description 2
- 208000025748 atypical depressive disease Diseases 0.000 claims description 2
- 201000010064 diabetes insipidus Diseases 0.000 claims description 2
- 206010013663 drug dependence Diseases 0.000 claims description 2
- 230000004064 dysfunction Effects 0.000 claims description 2
- 206010014599 encephalitis Diseases 0.000 claims description 2
- 206010015037 epilepsy Diseases 0.000 claims description 2
- 230000005176 gastrointestinal motility Effects 0.000 claims description 2
- 208000014674 injury Diseases 0.000 claims description 2
- 201000009941 intracranial hypertension Diseases 0.000 claims description 2
- 206010027599 migraine Diseases 0.000 claims description 2
- 208000029766 myalgic encephalomeyelitis/chronic fatigue syndrome Diseases 0.000 claims description 2
- 230000004770 neurodegeneration Effects 0.000 claims description 2
- 208000015122 neurodegenerative disease Diseases 0.000 claims description 2
- 125000004433 nitrogen atom Chemical group N* 0.000 claims description 2
- 208000022821 personality disease Diseases 0.000 claims description 2
- 201000000484 premenstrual tension Diseases 0.000 claims description 2
- 208000020016 psychiatric disease Diseases 0.000 claims description 2
- 201000000980 schizophrenia Diseases 0.000 claims description 2
- 231100000872 sexual dysfunction Toxicity 0.000 claims description 2
- 201000002859 sleep apnea Diseases 0.000 claims description 2
- 208000019116 sleep disease Diseases 0.000 claims description 2
- 208000011117 substance-related disease Diseases 0.000 claims description 2
- 230000008733 trauma Effects 0.000 claims description 2
- 150000002431 hydrogen Chemical group 0.000 claims 2
- 208000010643 digestive system disease Diseases 0.000 claims 1
- 208000018685 gastrointestinal system disease Diseases 0.000 claims 1
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 88
- 239000000243 solution Substances 0.000 description 36
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 23
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 21
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 21
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 20
- 102000005962 receptors Human genes 0.000 description 19
- 108020003175 receptors Proteins 0.000 description 19
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 18
- 239000012074 organic phase Substances 0.000 description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 14
- 239000002253 acid Substances 0.000 description 13
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 12
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 12
- 239000012071 phase Substances 0.000 description 12
- 125000001424 substituent group Chemical group 0.000 description 12
- 239000000741 silica gel Substances 0.000 description 11
- 229910002027 silica gel Inorganic materials 0.000 description 11
- 229960001866 silicon dioxide Drugs 0.000 description 11
- 239000007787 solid Substances 0.000 description 11
- 239000012267 brine Substances 0.000 description 10
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 10
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 10
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 9
- MZRVEZGGRBJDDB-UHFFFAOYSA-N N-Butyllithium Chemical compound [Li]CCCC MZRVEZGGRBJDDB-UHFFFAOYSA-N 0.000 description 9
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 9
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 9
- 239000000543 intermediate Substances 0.000 description 9
- 229910052938 sodium sulfate Inorganic materials 0.000 description 9
- 235000011152 sodium sulphate Nutrition 0.000 description 9
- 238000003756 stirring Methods 0.000 description 9
- 238000004587 chromatography analysis Methods 0.000 description 8
- 239000013078 crystal Substances 0.000 description 8
- 238000002360 preparation method Methods 0.000 description 8
- 238000010992 reflux Methods 0.000 description 8
- QZAYGJVTTNCVMB-UHFFFAOYSA-N serotonin Chemical compound C1=C(O)C=C2C(CCN)=CNC2=C1 QZAYGJVTTNCVMB-UHFFFAOYSA-N 0.000 description 8
- 238000002844 melting Methods 0.000 description 7
- 230000008018 melting Effects 0.000 description 7
- SGNPIGAGPRLGEJ-UHFFFAOYSA-N oxathiazolidine-3-carboxylic acid Chemical compound OC(=O)N1CCOS1 SGNPIGAGPRLGEJ-UHFFFAOYSA-N 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 230000002829 reductive effect Effects 0.000 description 7
- 239000002904 solvent Substances 0.000 description 7
- 239000000725 suspension Substances 0.000 description 7
- 239000003826 tablet Substances 0.000 description 7
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 7
- VHFVKMTVMIZMIK-UHFFFAOYSA-N 1-(3-chlorophenyl)piperazine Chemical compound ClC1=CC=CC(N2CCNCC2)=C1 VHFVKMTVMIZMIK-UHFFFAOYSA-N 0.000 description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- DTQVDTLACAAQTR-UHFFFAOYSA-N Trifluoroacetic acid Chemical compound OC(=O)C(F)(F)F DTQVDTLACAAQTR-UHFFFAOYSA-N 0.000 description 6
- 229910052786 argon Inorganic materials 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 6
- 230000037406 food intake Effects 0.000 description 6
- 229960003390 magnesium sulfate Drugs 0.000 description 6
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- XHXFXVLFKHQFAL-UHFFFAOYSA-N phosphoryl trichloride Chemical compound ClP(Cl)(Cl)=O XHXFXVLFKHQFAL-UHFFFAOYSA-N 0.000 description 6
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- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 5
- 238000005481 NMR spectroscopy Methods 0.000 description 5
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical class [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 5
- HEDRZPFGACZZDS-MICDWDOJSA-N Trichloro(2H)methane Chemical compound [2H]C(Cl)(Cl)Cl HEDRZPFGACZZDS-MICDWDOJSA-N 0.000 description 5
- 239000000883 anti-obesity agent Substances 0.000 description 5
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- MVXYKWRRNGIUOD-UHFFFAOYSA-N 5-bromo-7,8-dihydro-6h-pyrido[4,3-b]pyrrolizine Chemical compound C12=CN=CC=C2C(Br)=C2N1CCC2 MVXYKWRRNGIUOD-UHFFFAOYSA-N 0.000 description 4
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 4
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- FYSNRJHAOHDILO-UHFFFAOYSA-N thionyl chloride Chemical compound ClS(Cl)=O FYSNRJHAOHDILO-UHFFFAOYSA-N 0.000 description 4
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- GYWQRKLSYUKDJB-UHFFFAOYSA-N 5-(2-nitroprop-1-enyl)-7,8-dihydro-6h-pyrido[3,2-b]pyrrolizine Chemical compound C12=NC=CC=C2C(C=C(C)[N+]([O-])=O)=C2N1CCC2 GYWQRKLSYUKDJB-UHFFFAOYSA-N 0.000 description 3
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- 238000005160 1H NMR spectroscopy Methods 0.000 description 2
- HMZIBPVMXNDXBV-UHFFFAOYSA-N 5-(2-nitroprop-1-enyl)-7,8-dihydro-6h-pyrido[3,4-b]pyrrolizine Chemical compound C12=CC=NC=C2C(C=C(C)[N+]([O-])=O)=C2N1CCC2 HMZIBPVMXNDXBV-UHFFFAOYSA-N 0.000 description 2
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- 125000004181 carboxyalkyl group Chemical group 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 208000026106 cerebrovascular disease Diseases 0.000 description 1
- 238000005356 chiral GC Methods 0.000 description 1
- 125000003016 chromanyl group Chemical group O1C(CCC2=CC=CC=C12)* 0.000 description 1
- 125000004230 chromenyl group Chemical group O1C(C=CC2=CC=CC=C12)* 0.000 description 1
- 125000000259 cinnolinyl group Chemical group N1=NC(=CC2=CC=CC=C12)* 0.000 description 1
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- 229940110456 cocoa butter Drugs 0.000 description 1
- 235000019868 cocoa butter Nutrition 0.000 description 1
- 208000029078 coronary artery disease Diseases 0.000 description 1
- 125000000332 coumarinyl group Chemical group O1C(=O)C(=CC2=CC=CC=C12)* 0.000 description 1
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- 235000019404 dichlorodifluoromethane Nutrition 0.000 description 1
- 229940042935 dichlorodifluoromethane Drugs 0.000 description 1
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- 229940087091 dichlorotetrafluoroethane Drugs 0.000 description 1
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- 239000002270 dispersing agent Substances 0.000 description 1
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- 239000008273 gelatin Substances 0.000 description 1
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- 125000005456 glyceride group Chemical group 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
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- 125000001072 heteroaryl group Chemical group 0.000 description 1
- 125000000623 heterocyclic group Chemical group 0.000 description 1
- 125000004634 hexahydroazepinyl group Chemical group N1(CCCCCC1)* 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 125000002768 hydroxyalkyl group Chemical group 0.000 description 1
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 description 1
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 description 1
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- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 125000002632 imidazolidinyl group Chemical group 0.000 description 1
- 125000002636 imidazolinyl group Chemical group 0.000 description 1
- 125000002883 imidazolyl group Chemical group 0.000 description 1
- 238000000338 in vitro Methods 0.000 description 1
- 125000003453 indazolyl group Chemical group N1N=C(C2=C1C=CC=C2)* 0.000 description 1
- 125000003387 indolinyl group Chemical group N1(CCC2=CC=CC=C12)* 0.000 description 1
- 125000001041 indolyl group Chemical group 0.000 description 1
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- 238000001990 intravenous administration Methods 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 125000001977 isobenzofuranyl group Chemical group C=1(OC=C2C=CC=CC12)* 0.000 description 1
- 125000003384 isochromanyl group Chemical group C1(OCCC2=CC=CC=C12)* 0.000 description 1
- 125000003151 isocoumarinyl group Chemical group C1(=O)OC(=CC2=CC=CC=C12)* 0.000 description 1
- 125000000904 isoindolyl group Chemical group C=1(NC=C2C=CC=CC12)* 0.000 description 1
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- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 description 1
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- LJCNRYVRMXRIQR-OLXYHTOASA-L potassium sodium L-tartrate Chemical compound [Na+].[K+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O LJCNRYVRMXRIQR-OLXYHTOASA-L 0.000 description 1
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- 125000004309 pyranyl group Chemical group O1C(C=CC=C1)* 0.000 description 1
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- 125000000719 pyrrolidinyl group Chemical group 0.000 description 1
- 125000001422 pyrrolinyl group Chemical group 0.000 description 1
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- 125000002943 quinolinyl group Chemical group N1=C(C=CC2=CC=CC=C12)* 0.000 description 1
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- BEOOHQFXGBMRKU-UHFFFAOYSA-N sodium cyanoborohydride Chemical compound [Na+].[B-]C#N BEOOHQFXGBMRKU-UHFFFAOYSA-N 0.000 description 1
- 235000009518 sodium iodide Nutrition 0.000 description 1
- 239000001476 sodium potassium tartrate Substances 0.000 description 1
- 235000011006 sodium potassium tartrate Nutrition 0.000 description 1
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- 229940079832 sodium starch glycolate Drugs 0.000 description 1
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- NFAKQWFVEAEEPG-LURJTMIESA-N tert-butyl (4s)-4-methyl-2,2-dioxooxathiazolidine-3-carboxylate Chemical compound C[C@H]1COS(=O)(=O)N1C(=O)OC(C)(C)C NFAKQWFVEAEEPG-LURJTMIESA-N 0.000 description 1
- ALJRPIAYJALVFG-UHFFFAOYSA-N tert-butyl 2,2-dioxooxathiazolidine-3-carboxylate Chemical compound CC(C)(C)OC(=O)N1CCOS1(=O)=O ALJRPIAYJALVFG-UHFFFAOYSA-N 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 125000003718 tetrahydrofuranyl group Chemical group 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
- 125000001113 thiadiazolyl group Chemical group 0.000 description 1
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- 150000003573 thiols Chemical class 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
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Description
New aza-indolyl derivatives
The present invention relates to new aza-indolyl derivatives, to processes and intermediates for their preparation, to pharmaceutical compositions containing them and to their medicinal use. The active compounds of the present invention are useful in treating obesity and other disorders.
It has been recognised that obesity is a disease process influenced by environmental factors in which the traditional weight loss methods of dieting and exercise need to be supplemented by therapeutic products (S. Parker, "Obesity: Trends and Treatments", Scrip Reports, PJB Publications Ltd, 1996).
Whether someone is classified as overweight or obese is generally determined on the basis of their body mass index (BMI) which is calculated by dividing body weight (kg) by height squared (m2). Thus, the units of BMI are kg/m2 and it is possible to calculate the BMI range associated with minimum mortality in each decade of life. Overweight is defined as a BMI in the range 25-30 kg/m", and obesity as a BMI greater than 30 kg/m2. There are problems with this definition in that it does not take into account the proportion of body mass that is muscle in relation to fat (adipose tissue). To account for this, obesity can also be defined on the basis of body fat content: greater than 25% and 30% in males and females, respectively.
As the BMI increases there is an increased risk of death from a variety of causes that is independent of other risk factors. The most common diseases with
obesity are cardiovascular disease (particularly hypertension), diabetes (obesity aggravates the development of diabetes), gall bladder disease (particularly cancer) and diseases of reproduction. Research has shown that even a modest reduction in body weight can correspond to a significant reduction in the risk of developing coronary heart disease.
Compounds marketed as anti-obesity agents include Orlistat (XENICAL*) and Sibutramine. Orlistat (a lipase inhibitor) inhibits fat absorption directly and tends to produce a high incidence of unpleasant (though relatively harmless) side-effects such as diarrhoea. Sibutramine (a mixed 5-HT/noradrenaline reuptake inhibitor) can increase blood pressure and heart rate in some patients. The serotonin releaser/reuptake inhibitors fenfluramine (Pondimin ) and dexfenfluramine (Redux l ) have been reported to decrease food intake and body weight over a prolonged period (greater than 6 months). However, both products were withdrawn after reports of preliminary evidence of heart valve abnormalities associated with their use. There is therefore a need for the development of a safer anti- obesity agent.
The non-selective 5-HT2c receptor agonists/partial agonists m- chlorophenylpiperazine (mCPP) and trifluoromethylphenylpiperazine (TFMPP) have been shown to reduce food intake in rats (G.A. Kennett and G. Curzon,
PsychopharmacoL, 1988, 96, 93-100; G.A. Kennett, C.T. Dourish and G. Curzon, Eur. }. Pharmacol, 1987, 141, 429-435) and to accelerate the appearance of the behavioural satiety sequence (S.J. Kitchener and C.T. Dourish, PsychopharmacoL, 1994, 113, 369- 377). Recent findings from studies with mCPP in normal human volunteers and obese subjects have also shown decreases in food intake. Thus, a single dose of mCPP decreased food intake in female volunteers (A.E.S. Walsh et al, PsychopharmacoL, 1994, 116, 120-122) and decreased the appetite and body weight of obese male and female subjects during subchronic treatment for a 14 day period (P.A. Sargeant et al, PsychopharmacoL, 1997, 133, 309-312). The anorectic action of mCPP is absent in 5- HT2C receptor knockout mutant mice (L.H. Tecott et al, Nature, 1995, 374, 542-546) and is antagonised by the 5-HT c receptor antagonist SB-242084 in rats (G.A. Kennett et al, Neuropharmacol., 1997, 36, 609-620). It seems therefore that mCPP decreases food intake via an agonist action at the 5-HT2c receptor.
Other compounds which have been proposed as 5-HT2c receptor agonists for use in the treatment of obesity include the substituted 1-aminoethyl indoles disclosed in
EP-A-0655440. CA-2132887 and CA-2153937 disclose that tricyclic 1- aminoethylpyrrole derivatives and tricyclic 1-aminoethyl pyrazole derivatives bind to 5- HT2c receptors and may be used in the treatment of obesity. WO-A-98/30548 discloses aminoalkylindazole compounds as 5-HT2c agonists for the treatment of CNS diseases and appetite regulation disorders. 2-(2,3-Dihydro- lH-pyrrolo[ l,2-a] indol-9- yl)ethylamine is disclosed in J.Med.Chem., 1965, 8, 700. The preparation of pyrido[ 1,2- rt]indoles for the treatment of cerebrovascular disorders is disclosed in EP-A-0252643 and EP-A-0167901. The preparation of 10- [(acylamino)ethyl]tetrahydropyrido[ l,2- αjindoles as anti-ischemic agents is disclosed in EP-A-0279125.
It is an object of this invention to provide selective, directly acting 5HT3 receptor ligands for use in therapy and particularly for use as anti-obesity agents. Itis a further object of this invention to provide directly acting ligands selective for 5-HT2B and/or 5-HT2c receptors, for use in therapy and particularly for use as anti-obesity agents. It is a further object of this invention to provide selective, directly acting 5- HT2c receptor ligands, preferably 5-HT2c receptor agonists, for use in therapy and particularly for use as anti-obesity agents.
According to the present invention there is provided a chemical compound of formula (I):
wherein
n is 1, 2 or 3;
X1 is nitrogen or CR4; X" is nitrogen or CR5; X3 is nitrogen or CR6; X4 is nitrogen or CR ; wherein one or two of the X 1 , v X_", v X-3" and X groups are nitrogen;
R and R" are independently selected from hydrogen and alkyl;
R' is hydrogen or alkyl;
R4 to R7 are independently selected from hydrogen, halogen, hydroxy, alkyl, aryl, alkoxy, aryloxy, alkylthio, arylthio, alkylsulfoxyl, alkylsulfonyl, arylsulfoxyl, arylsulfonyl, amino, monoalkylamino, dialkylamino, nitro, cyano, carboxaldehyde, alkyl carbonyl, arylcarbonyl, aminocarbonyl, monoalkylaminocarbonyl, dialkylaminocarbonyl, alkoxycarbonylamino, aminocarbonyloxy, monoalkylaminocarbonyloxy, dialkylaminocarbonyloxy, monoalkylaminocarbonylamino and dialkylaminocarbonylamino, and wherein a carbon ring atom next to a nitrogen is not substituted by halogen;
and pharmaceutically acceptable salts and prodrugs thereof. Preferred are the compounds according to formula (I) and salts thereof.
As used herein, the term "alkyl" means a branched or unbranched, cyclic or acyclic, saturated or unsaturated (e.g. alkenyl or alkynyl) hydrocarbyl radical. Where cyclic, the alkyl group is preferably C3 to 2, more preferably C5 to Cio, more preferably C5, C6 or C7. Where acyclic, the alkyl group is preferably to Cio, more preferably to C6, more preferably methyl, ethyl, propyl (n-propyl or isopropyl) or butyl (n-butyl, isobutyl or tertiary-butyl), more preferably methyl.
As used herein, the term "lower alkyl" means methyl, ethyl, propyl (n-propyl or isopropyl) or butyl (n-butyl, isobutyl or tertiary-butyl).
As used herein, the term "aryl" means an aromatic group, such as phenyl or naphthyl, or a heteroaromatic group containing one or more, preferably one, heteroatom, such as pyridyl, pyrrolyl, furanyl and thienyl.
The alkyl and aryl groups may be substituted or unsubstituted. Where substituted, there will generally be 1 to 3 substituents present, preferably 1 substituent. Substituents may include:
carbon-containing groups such as
alkyl,
aryl,
arylalkyl (e.g. substituted and unsubstituted phenyl, substituted and unsubstituted benzyl);
halogen atoms and halogen-containing groups such as
haloalkyl (e.g. trifluoromethyl);
oxygen-containing groups such as
alcohols (e.g. hydroxy, hydroxyalkyl, aryl (hydroxy) alkyl),
ethers (e.g. alkoxy, aryloxy, alkoxyalkyl, aryloxyalkyl),
aldehydes (e.g. carboxaldehyde),
ketones (e.g. alkylcarbonyl, alkylcarbonylalkyl, arylcarbonyl,'
arylalkylcarbonyl, arylcarbonylalkyl),
acids (e.g. carboxy, carboxyalkyl),
acid derivatives such as esters (e.g. alkoxycarbonyl, alkoxycarbonylalkyl,
alkylcarbonyloxy, alkylcarbonyloxyalkyl),
amides (e.g. aminocarbonyl, mono- or di- alkylaminocarbonyl, aminocarbonylalkyl, mono- or di-alkylaminocarbonylalkyl, arylaminocarbonyl),
carbamates (e.g. alkoxycarbonylamino, aryloxycarbonylamino, aminocarbonyloxy, mono- or di-alkylaminocarbonyloxy, arylaminocarbonyloxy)
and ureas (e.g. mono- or di-alkylaminocarbonylamino or arylaminocarbonylamino);
nitrogen-containing groups such as
amines (e.g. amino, mono- or di-alkylamino, aminoalkyl, mono- or di-alkylaminoalkyl),
azides,
nitriles (e.g. cyano, cyanoalkyl),
nitro;
sulfur-containing groups such as
thiols, thioethers, sulfoxides and sulfones
(e.g. alkylthio, alkyl sulfinyl, alkylsulfonyl, alkylthioalkyl, alkylsulfinylalkyl, alkylsulfonylalkyl, arylthio, arylsulfinyl, arylsulfonyl, arylthioalkyl, arylsulfinylalkyl, arylsulfonylalkyl);
and heterocyclic groups containing one or more, preferably one, heteroatom,
(e.g. thienyl, furanyl, pyrrolyl, imidazolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, oxadiazolyl, thiadiazolyl, aziridinyl, azetidinyl, pyrrolidinyl, pyrrolinyl, imidazolidinyl, imidazolinyl, pyrazolidinyl, tetrahydrofuranyl, pyranyl, pyronyl, pyridyl, pyrazinyl, pyridazinyl, piperidyl, hexahydroazepinyl, piperazinyl, morpholinyl, thianaphthyl, benzofuranyl, isobenzofuranyl, indolyl, oxyindolyl, isoindolyl, indazolyl, indolinyl, 7-azaindolyl, benzopyranyl, coumarinyl, isocoumarinyl, quinolinyl, isoquinolinyl, naphthyridinyl, cinnolinyl, quinazolinyl, pyridopyridyl, benzoxazinyl, quinoxalinyl, chromenyl, chromanyl, isochromanyl, phthalazinyl and carbolinyl).
As used herein, the term "alkoxy" means alkyl-O- and "alkoyl" means alkyl-
CO-. Alkoxy substituent groups or alkoxy-containing substituent groups may be substituted by one or more alkyl groups.
As used herein, the term "halogen" means a fluorine, chlorine, bromine or iodine radical, preferably a fluorine, chlorine or bromine radical.
As used herein the term "prodrug" means any pharmaceutically acceptable prodrug of the compound of formula (I).
As used herein, the term "pharmaceutically acceptable salt" or "salt" means any pharmaceutically acceptable salt of the compound of formula (I). Salts may be prepared from pharmaceutically acceptable non-toxic acids and bases including inorganic and organic acids and bases. Such acids include acetic, benzenesulfonic, benzoic, camphorsulfonic, citric, ethenesulfonic, dichloroacetic, formic, fumaric, gluconic, glutamic, hippuric, hydrobromic, hydrochloric, isethionic, lactic, maleic, malic, mandelic, methanesulfonic, mucic, nitric, oxalic, pamoic, pantothenic, phosphoric, succinic, sulfuric, tartaric, oxalic, p-toluenesulfonic and the like.
Particularly preferred are fumaric, hydrochloric, hydrobromic, phosphoric, succinic, sulfuric and methanesulfonic acids. Acceptable base salts include alkali metal (e.g. sodium, potassium), alkaline earth metal (e.g. calcium, magnesium) and aluminium salts.
The term "lipase inhibitor" refers to compounds that are capable of inhibiting the action of lipases, for example gastric and pancreatic lipases. For example orlistat and lipstatin as described in U.S. Patent No. 4,598,089 are potent inhibitor of lipases. Lipstatin is a natural product of microbial origin, and orlistat is the result of a hydrogenation of lipstatin. Other lipase inhibitors include a class of compound commonly referred to as panclicins. Panclicins are analogues of orlistat (Mutoh et al, 1994). The term "lipase inhibitor" refers also to polymer bound lipase inhibitors for example described in International Patent Application W099/34786 (Geltex Pharmaceuticals Inc.). These polymers are characterised in that they have been substituted with one or more groups that inhibit lipases. The term "lipase inhibitor" also comprises pharmaceutically acceptable salts of these compounds. The term "lipase inhibitor" preferably refers to orlistat.
Orlistat is a known compound useful for the control or prevention of obesity and hyperlipidemia. See, U.S. Patent No. 4,598,089, issued July 1, 1986, which also discloses processes for making orlistat and U.S. Patent No. 6,004,996, which discloses appropriate pharmaceutical compositions. Further suitable pharmaceutical compositions are described for example in International Patent Applications WO 00/09122 and WO 00/09123. Additional processes for the preparation of orlistat are disclosed in European Patent Applications Publication Nos. 185,359, 189,577, 443,449, and 524,495.
Orlistat is preferably orally administered from 60 to 720 mg per day in divided doses two to three times per day. Preferred is wherein from 180 to 360 mg, most preferably 360 mg per day of a lipase inhibitor is administered to a subject, preferably in divided doses two or, particularly, three times per day. The subject is preferably an obese or overweight human, i.e. a human with a body mass index of 25 or greater. Generally, it is preferred that the lipase inhibitor be administered within about one or two hours of ingestion of a meal containing fat. Generally, for administering a lipase inhibitor as defined above it is preferred that treatment be administered to a human who has a strong family history of obesity and has obtained a body mass index of 25 or greater.
Orlistat can be administered to humans in conventional oral compositions, such as, tablets, coated tablets, hard and soft gelatin capsules, emulsions or suspensions. Examples of carriers which can be used for tablets, coated tablets, dragees and hard gelatin capsules are lactose, other sugars and sugar alcohols like sorbitol, mannitol, maltodextrin, or other fillers; surfactants like sodium lauryl sulfate, Brij 96, or Tween 80; disintegrants like sodium starch glycolate, maize starch or derivatives thereof; polymers like povidone, crospovidone; talc; stearic acid or its salts and the like. Suitable carriers for soft gelatin capsules are, for example, vegetable oils, waxes, fats, semi-solid and liquid polyols and the like. Moreover, the pharmaceutical preparations can contain preserving agents, solubilizers, stabilising agents, wetting agents, emulsifying agents, sweetening agents, colouring agents, flavouring agents, salts for varying the osmotic pressure, buffers, coating agents and antioxidants. They can also contain still other therapeutically valuable substances. The formulations may conveniently be presented in unit dosage form and may be prepared by any methods known in the pharmaceutical art. Preferably, orlistat is administered according to the formulation shown in the Examples and in U.S. Patent No. 6,004,996, respectively.
In a preferred embodiment the present invention refers to compounds as defined above wherein in case two of the X , X", X' and X groups are nitrogen these nitrogen atoms are in meta or para position to each other.
In a preferred embodiment the present invention refers to compounds as defined above wherein X1 is nitrogen, X" is CR5, X' is CR6, and X4 is CR7.
In a further preferred embodiment the present invention refers to compounds as defined above wherein X1 is CR4; X2 is nitrogen; X3 is CR6 and X4 is CR .
In a further preferred embodiment the present invention refers to compounds as defined above wherein X1 is CR4, X2 is CR5; X3 is nitrogen and X4 is CR .
In a further preferred embodiment the present invention refers to compounds as defined above wherein X1 is CR4, X' is CR ; X is CR and X is nitrogen.
In a further preferred embodiment the present invention refers to compounds as defined above wherein X1 is nitrogen, X2 is CR5, X3 is nitrogen and X4 is CR .
In a further preferred embodiment the present invention refers to compounds as defined above wherein X1 is CR4, X" is nitrogen, X is CR and X is nitrogen.
In a further preferred embodiment the present invention refers to compounds as defined above wherein X1 is nitrogen, X2 is CR5, X3 is CR6 and X4 is nitrogen.
In a preferred embodiment, the compounds of formula (I) are selected from compounds in which n is 1.
Preferably, the compounds of formula (I) are selected from compounds in which
R is the same as R2. Preferably, R1 and R2 are both hydrogen. In an embodiment of the invention, R1 is hydrogen and R" is alkyl (preferably lower alkyl and more preferably methyl) optionally substituted by an aryl (preferably a substituted or unsubstituted phenyl or thienyl group) or by a cycloalkyl group (preferably saturated and preferably selected from a C3, C > C5, C and C7 cycloalkyl group).
Preferably, the compounds of formula (I) are selected from compounds in which R~ is lower alkyl, preferably methyl or ethyl, preferably methyl.
R to R' are independently selected from hydrogen, halogen, hydroxy, alkyl (including cycloalkyl, halo-alkyl (such as trifluoromethyl) and arylalkyl), aryl, alkoxy (including arylalkoxy), aryloxy, alkylthio, arylthio, alkylsulfoxyl, alkylsulfonyl, arylsulfoxyl, arylsulfonyl, amino, monoalkylamino, diaikylamino, nitro, cyano, carboxaldehyde, alkylcarbonyl, arylcarbonyl, aminocarbonyl, monoalkylaminocarbonyl, dialkylaminocarbonyl, alkoxycarbonylamino, aminocarbonyloxy, monoaikylaminocarbonyloxy, dialkylaminocarbonyloxy, monoalkylaminocarbonylamino and dialkylaminocarbonylamino.
In an embodiment of the invention, R to R are independently selected from hydrogen, halogen, hydroxy, alkyl (including cycloalkyl, halo-alkyl (such as trifluoromefhyl) and arylalkyl), aryl, alkoxy (including arylalkoxy), aryloxy, alkylthio, alkylsulfoxyl and alkylsulfonyl.
It is preferred that R4 is selected from hydrogen and halogen, preferably hydrogen.
It is preferred that R5 is selected from a substituent group other than hydrogen, and preferably from halogen, alkyl, alkoxy, alkylthio, alkylsulfonyl, monoalkylamino and dialkylamino, and more preferably from halogen (preferably fluoro, chloro and bromo), alkyl (preferably lower alkyl and preferably trifluoromethyl), alkoxy (preferably lower alkoxy) and alkylthio (preferably low7er alkylthio).
It is preferred that R is selected from halogen (preferably fluoro and chloro) and hydrogen. In an embodiment of the invention, R is a substituent group other than hydrogen.
In an embodiment of the invention, two or three of R4, R"\ R6 and R7, preferably two or three of R4, R6 and R' are hydrogen.
In a preferred embodiment, the compounds of formula (I) are selected from (R,S)-2-(2,3-dihydro-lH-3a,6-diaza-cyclopenta[a]inden-8-yl)-l-methyl-ethylamine and (R,S)-2-(2,3-dihydro-lH-3a,4-diaza-cyclopenta [a] inden-8-yl)- l -methyl - ethylamine. Where the compounds of formula (I) are in salt form, the fumarate salts are preferred.
The compounds of the invention may contain one or more asymmetric carbon atoms, so that the compounds can exist in different stereoisomeric forms. The compounds can be, for example, racemates or optically active forms. The optically active forms can be obtained by resolution of the racemates or by asymmetric synthesis.
According to a further aspect of the invention, there is provided a compound of formula (I) for use in therapy.
The compounds of formula (I) may be used in the treatment (including prophylactic treatment) of disorders associated with 5-HT2 receptor function. The
compounds may act as receptor agonists or antagonists. Preferably, the compounds may be used in the treatment (including prophylactic treatment) of disorders associated with 5-HT2B and/or 5-HT2c receptor function. Preferably, the compounds may be used in the treatment (including prophylactic treatment) of disorders where a 5-HT2C receptor agonist is required.
The compounds of formula (I) may be used in the treatment or prevention of central nervous disorders such as depression, atypical depression, bipolar disorders, anxiety disorders, obsessive-compulsive disorders, social phobias or panic states, sleep disorders, sexual dysfunction, psychoses, schizophrenia, migraine and other conditions associated with cephalic pain or other pain, raised intracranial pressure, epilepsy, personality disorders, age-related behavioural disorders, behavioural disorders associated with dementia, organic mental disorders, mental disorders in childhood, aggressivity, age-related memory disorders, chronic fatigue syndrome, drug and alcohol addiction, obesity, bulimia, anorexia nervosa or premenstrual tension; damage of the central nervous system such as by trauma, stroke, neurodegenerative diseases or toxic or infective CNS diseases such as encephalitis or meningitis; cardiovascular disorders such as thrombosis; gastrointestinal disorders such as dysfunction of gastrointestinal motility; diabetes insipidus; and sleep apnea.
According to a further aspect of the invention, there is provided use of a compound of formula (I) in the manufacture of a medicament for the treatment (including prophylaxis) of the above-mentioned disorders. In a preferred embodiment, there is provided use of a compound of formula (I) in the manufacture of a medicament for the treatment (including prophylaxis) of obesity. The term obesity includes eating disorders.
According to a further aspect of the invention, there is provided a method of treatment (including prophylaxis) of a disorder selected from the group consisting of the above-mentioned disorders comprising administering to a patient in need of such treatment an effective dose of a compound of formula (I). In a preferred embodiment, there is provided a method of treatment (including prophylaxis) of obesity.
According to a further aspect of the invention, there is provided a pharmaceutical composition comprising a compound of formula (I) in combination with a pharmaceutically acceptable carrier or excipient and a method of making such a
composition comprising combining a compound of formula (I) with a pharmaceutically acceptable carrier or excipient.
According to a further aspect of the invention, there is provided a method of preparing a compound of formula (I), especially a method comprising reduction and/or reductive alkylation of a compound of formula (NI)
wherein X r l , X v2", X v3 , v X , τ R-, 3" and n are as defined above.
The compounds of formula I can contain several asymmetric centres and can be present in the form of optically pure enantiomers, mixtures of enantiomers such as, for example, racemates, optically pure diastereoisomers, mixtures of diastereoisomers, diastereoisomeric racemates or mixtures of diastereoisomeric racemates. The optically active forms can be obtained for example by resolution of the racemates, by asymmetric synthesis or asymmetric chromatography (chromatography with a chiral adsorbens or eluant).
The term "asymmetric carbon atom (C*) means a carbon atom with four different substituents. According to the Cahn-Ingold-Prelog-Convention the asymmetric carbon atom can be of the "R" or "S" configuration.
Preferred are chiral compounds of formula (I), wherein R1 to R , X1 to X and n are defined as before. Particularly preferred are compounds according to formula (lb)
wherein R1 to R", X1 to X4 and n are defined as before. Formula (lb) means that the asymmetric carbon atom C*
is of the R configuration.
A further particularly preferred aspect of the present invention are compounds according to formula (la)
wherein R1 to R3, X1 to X4 and n are defined as before. Formula (lb) means that the asymmetric carbon atom C*
f the S configuration.
Likewise preferred are compounds of formula I, wherein R" is hydrogen.
Particularly preferred are compounds of formula I selected from the following compounds: (S)-2-(2,3-dihydro-lH-3a,5-diaza-cyclopenta[a]inden-8-yl)- l-methyl- ethylamine;
(R)-2-(2,3-dihydro- lH-3a,5-diaza-cyclopenta[a] inden-8-yl)- l-methyl- ethylamine;
(S)-2-(2,3-dihydro-lH-3a,6-diaza-cyclopenta[a]inden-8-yl)- l-methyl- ethylamine;
(R)-2-(2,3-dihydro-lH-3a,6-diaza-cyclopenta[a] inden-8-yl)- l-methyl- ethylamine;
2-(2,3-dihydro- lH-3a,6-diaza-cyclopenta[a]inden-8-yl)-ethylamine.
Another preferred aspect of the invention is a method of treatment of obesity in a human in need of such treatment which comprises administration to the human a therapeutically effective amount of a compound of the present invention and a therapeutically effective amount of a lipase inhibitor. Particularly preferred is this method of treatment, wherein the lipase inhibitor is orlistat.
Further preferred is the use of a compound of the present invention in the manufacture of a medicament for the treatment and prevention of obesity in a patient who is also receiving treatment with a lipase inhibitor. Particularly preferred is this use, wherein the lipase inhibitor is orlistat.
Another preferred aspect is the pharmaceutical composition as before comprising further a therapeutically effective amount of a lipase inhibitor. Particularly preferred is this pharmaceutical composition, wherein the lipase inhibitor is orlistat.
Compounds of the invention may be prepared according to Reaction Scheme 1 below. Ri to R7 are as previously defined.
Compounds of formula (II) may be prepared by reaction of the corresponding protected amine with iodine ( , nBuLi, TMEDA) and deprotection of the amino group.
Compounds of formula (II) may be reacted with compounds of formula (III) under palladium catalysed conditions to give compounds of formula (IV). The carboxaldehyde (V) may be obtained by reaction of compound (IN) with e.g. the Nilsmeier reagent prepared from DMF and phosphorus oxychloride under standard conditions. The nitroalkene (NI) may be obtained by reaction of compound (N) with a nitroalkane. Compounds of formula (I) can be formed in the reaction of the nitroalkene (VI) with a reducing agent such as lithium aluminium hydride in an ethereal solvent.
Reaction Scheme 1
(II) (in) (IV)
(i)
The compounds of formula (I) (R1 and/or R" = alkyl) may be prepared from compounds of formula (I) (R1 = R" = H) by standard methods such as reductive alkylation with an appropriate aldehyde or ketone in the presence of a reducing agent such as sodium triacetoxyborohydride, formic acid or sodium cyanoborohydride.
According to a further aspect of the invention there is provided a method of preparing compounds of type (I), especially in enantiomerically pure form, (scheme 2) The intermediate (IV) is halogenated, perferably brominated or iodinated with suitable halogenating reagents agents (e.g. bromine or N- Iodosuccinimide in an inert solvent e.g. dimethylformamide or acetonitrile) to yield an intermediate of formula (VII). This intermediate (VII) is treated with an agent effecting halogen-metal exchange, preferably halogen-lithium exchange (e.g. with butyl-lithium in an inert solvent e.g. THF) and treated wάth the novel chiral Sulfamidate A to yield an intermediate of formula (VIII). This latter intermediate (VIII) is transformed to a compound of formula (I) by methods known in the art, particularly by acid mediated cleavage of the BOC (meaning tert.-butlyoxycarbonyl) protecting group. Particularly preferred acids are trifluoroacetic acid or mixtures of trifluoroacetic acid in inert solvents such as dichloromethane and solutions of hydrochloric acid in inert solvents such as ethyl acetate, dioxane or diethyl ether. The stereochemistry, as indicated by the star (*), present in the chiral Sulfamidates A is without loss of integrity tansferred onto the intermediates (VIII) and compounds (I).
Scheme 2
R1,R2=H or alternatively H or alkyl
(i)
(VIII)
The novel sulfamidates of type A are conveniently obtained from BOC protected alpha amino alcohols, in particular BOC-glycinol, BOC-D-alalinol and BOC-L-alalinol, by first reacting with thionylchloride in an inert solvent such as tetrahydrofurane dichloromethane or ethyl acetate in the presence of a suitable base such as n-butyl lithium, triethylamine, imidazole or pyridine and the like and oxidizing the intermediate Sulfamidite B with suitable oxidizing agents such as sodium metaperiodate in the presence of suitable catalysts such as rutheniumdioxide hydrate._The stereochemistry, as indicated by the star (*), present in the BOC protected alpha amino alcohols is without loss of integrity tansferred onto the intermediates B and compounds A.
Scheme 3
R1,R2=H or alternatively H or alkyl
If, in any of the processes mentioned herein, the substituent group R4, R5, R or R is other than the one required, the substituent group may be converted to the desired substituent by known methods. The substituents R4, RD, R6 or R' may also need protecting against the conditions under which the reaction is carried out. In such a case, the protecting group may be removed after the reaction has been completed.
The processes described above may be carried out to give a compound of the invention in the form of a free base or as an acid addition salt. If the compound of the invention is obtained as an acid addition salt, the free base can be obtained by basifying a solution of the acid addition salt. Conversely, if the product of the process is a free base, an acid addition salt, particularly a pharmaceutically acceptable acid addition salt, may be obtained by dissolving the free base in a suitable organic solvent and treating the solution with an acid, in accordance with conventional procedures for preparing acid addition salts from basic compounds.
The compositions of the present invention may be formulated in a conventional manner using one or more pharmaceutically acceptable carriers. Thus, the active compounds of the invention may be formulated for oral, buccal, intranasal, parenteral {e.g., intravenous, intramuscular or subcutaneous) transdermal or rectal administration or in a form suitable for administration by inhalation or insufflation.
For oral administration, the pharmaceutical compositions may take the form of, for example, tablets or capsules prepared by conventional means with pharmaceutically acceptable excipients such as binding agents (e.g. pregelatinised maize starch, polyvinylpyrrolidone or hydroxypropylmethylcellulose); fillers (e.g. lactose, microcrystalline cellulose or calcium phosphate); lubricants (e.g. magnesium stearate, talc or silica); disintegrants (e.g. potato starch or sodium starch glycollate); or wetting agents (e.g. sodium lauryl sulfate). The tablets may be coated by methods well known in the art. Liquid preparations for oral administration may take the form of, for example, solutions, syrups or suspensions, or they may be presented as a dry product for constitution with water or other suitable vehicle before use. Such liquid preparations may be prepared by conventional means with pharmaceutically acceptable additives such as suspending agents (e.g. sorbitol syrup, methyl cellulose or hydrogenated edible fats); emulsifying agents (e.g. lecithin or acacia); non-aqueous vehicles (e.g. almond oil, oily esters or ethyl alcohol); and preservatives (e.g. methyl or propyl p-hydroxybenzoates or sorbic acid).
For buccal administration the composition may take the form of tablets or lozenges formulated in conventional manner.
The active compounds of the invention may be formulated for parenteral administration by injection, including using conventional catheterization techniques or infusion. Formulations for injection may be presented in unit dosage form e.g. in ampoules or in multi-dose containers, wτith an added preservative. The compositions may take such forms as suspensions, solutions or emulsions in oily or aqueous vehicles, and may contain formulating agents such as suspending, stabilizing and/or dispersing agents.
Alternatively, the active ingredient may be in powder form for reconstitution with a suitable vehicle, e.g. sterile pyrogen-free water, before use.
The active compounds of the invention may also be formulated in rectal compositions such as suppositories or retention enemas, e.g., containing conventional suppository bases such as cocoa butter or other glycerides.
For intranasal administration or administration by inhalation, the active compounds of the invention are conveniently delivered in the form of a solution or suspension from a pump spray container that is squeezed or pumped by the patient or as an aerosol spray presentation from a pressurized container or a nebulizer, with the use of a suitable propellant, e.g. dichlorodifluoromethane, trichlorofluoromethane, dichlorotetrafluoroethane, carbon dioxide or other suitable gas. In the case of a pressurized aerosol, the dosage unit may be determined by providing a valve to deliver a metered amount. The pressurized container or nebulizer may contain a solution or suspension of the active compound. Capsules and cartridges (made, for example, from gelatin) for use in an inhaler or insufflator may be formulated containing a powder mix of a compound of the invention and a suitable powder base such as lactose or starch.
A proposed dose of the active compounds of the invention for oral, parenteral or buccal administration to the average adult human for the treatment of the conditions referred to above (e.g., obesity) is 0.1 to 500 mg of the active ingredient per unit dose which could be administered, for example, 1 to 4 times per day.
The invention will now be described in detail with reference to the following examples. It will be appreciated that the invention is described by way of example only and modification of detail may be made without departing from the scope of the invention.
EXPERIMENTAL
Assay Procedures
1. Binding to serotonin receptors
The binding of compounds of formula (I) to serotonin receptors was determined in vitro by standard methods. The preparations were investigated in accordance with the assays given hereinafter.
Method (a): For the binding to the 5-HT2c receptor the 5-HT2c receptors were radiolabeled with [3H] -5-HT. The affinity of the compounds for 5-HT2C receptors in a CHO cell line was determined according to the procedure of D. Hoyer, G. Engel and H.O. Kalkman, European J. Pharmacol., 1985, 118, 13-23.
Method (b): For the binding to the 5-HT2B receptor the 5-HT2B receptors were radiolabeled with [3H] -5-HT. The affinity of the compounds for human 5-HT2B receptors in a CHO cell line was determined according to the procedure of K. Schmuck, C. Ullmer, P. Engels and H. Lubbert, FEBS Lett, 1994, 342, 85-90.
Method (c): For the binding to the 5-HT2A receptor the 5-HT .Λ receptors were radiolabeled with [125I]-DOI. The affinity of the compounds for 5-HT2A receptors in a CHO cell line was determined according to the procedure of D. J. McKenna and S. J. Peroutka, /. Neurosci., 1989, 9, 3482-90.
2. Functional activity
The functional activity of compounds of formula (I) was assayed using a Fluorimetric Imaging Plate reader (FLIPR). CHO cells expressing the human 5-HT2c or human 5-HT2A receptors were counted and plated into standard 96 well microtitre plates on the day before testing to give a confluent monolayer. The cells were then dye loaded with the calcium sensitive dye, Fluo-3-AM. Unincorporated dye was removed using an automated cell washer to leave a total volume of 100 μL/well of assay buffer (Hanks balanced salt solution containing 20 mM Hepes and 2.5 mM probenecid). The drug (dissolved in 50 μL of the assay buffer) was added at a rate of 70 μL/sec to each well of the FLIPR 96 well plate during fluorescence measurements. The measurements were taken at 1 sec intervals and the maximum fluorescent signal was measured (approx
10-15 sees after drug addition) and compared with the response produced by 10 μM 5- HT (defined as 100%) to which it was expressed as a percentage response (relative efficacy). Dose response curves were constructed using Graphpad Prism (Graph Software Inc.).
The compounds of formula (I) have activity at the h5-HT2c receptor in the range of 10,000 to 0.1 nM.
Examples
Example 1: (R,S)-2-(2,3-Dihydro-lH-3a,6-diaza-cyclopenta[a]inden-8-yl)- 1 -methylethylamine dihydrochloride
The compound was prepared according to methods known in the art: Xu, Lianhong; Lewis, Iestyn R.; Davidsen, Steven K.; Summers, James B. Tetrahedron Lett. ( 1998), 39(29), 5159-5162, for synthetic procedures for the preparation of 2- substituted 5-azaindoles; synthesis and cyclization reactions of acetylenic aminopyridines); Collini M D, Ellingboe J W, Tetrahedron Lett 38(46),7963-7966( 1997, for Pd catalysed coupling of acetylenes to o-Iodoanilines); Iritani, K.; Matsubara, S.; Utimoto, K.; Tetrahedron Lett 1988, 29 ( 15), 1799. ( 1988, for Pd catalysed cyclisation of o-amino phenylacetylenes to indoles); Chen H G, Hoechstetter C, Knochel P,
Tetrahedron Lett 30(36),4795-4798( 1989, for cyclisation of 2-(3-chloropropyl) indoles to lH-pyrrolo[ l,2-a]indoles).
a) 2,3-Dihydro-lH-3a,6-diaza-cyclopenta[a]indene
To a solution of 4-Amino-3-iodopyridine (2.2 g, 10.00 mMol) in acetonitrile
(25ml), was added dropwise trifluoroacetic anhydride (2.53g, 1.674 ml) at 0 °C followed by addition of potassium carbonate (4.14g,30 mMol). The mixture was stirred at room temperature for 10 min. To the resulting suspension was added bis(triphenylphosphine)-palladium(II)chloride (0.175 g, 0.25mMol), copper(I)iodide (0.095g, 0.50 mMol) and 5-chloro-l-pentyne ( 1.23 g, 12.00 mMol) and the mixture was heated to reflux under argon for 3h. The mixture was cooled to room temperature and partitioned between water and ethyl acetate. The phases were separated. The organic phase was extracted with water at pH 1.00. The acidic aqueous phase was mixed with dichloromethane and the pH was raised to 10 by addition of 2N NaOH. The phases
were separated and the organic phase was dried over sodium sulfate. The solvent was evaporated and the residue was taken up in acetonitrile (20 ml). To the brownish solution was added sodium iodide (3.00g, 20 mMol) and sodium hydride (ca 55% 0.873 g, 20 mMol) and the mixture was stirred at room temperature for 2h. The mixture was poured onto ice and partitioned between water and ethyl acetate ( 100 ml water 100 ml ethyl acetate). The phases were separated. The organic phase was extracted with water at pH 1.00 (5x 50 ml). The combined acidic aqueous phases were mixed with dichloromethane ( 100 ml) and the pH was raised to 10 by addition of 2N NaOH. The phases were separated and the organic phase was dried over sodium sulfate. The solvent was evaporated and the title compound (0.81g, 51 % of theory) was obtained as a brownish solid. For analytical purposes a sample was recrystallised from t- butylmethylether to afford light brown crystals melting at 95-96 °C; Found C, 75.93;- H, 6.32; N,17.80%. C10H10N2 requires : C, 75.92; H, 6.37; N, 17.71%
b) 2,3-Dihydro-lH-3a,6-diaza-cyclopenta[a]indene-8-carbaldehyde
To dimethylformamide (0.3 ml) was added phosphorus oxychloride (0.33 ml) dropwise at 0°C. The mixture was allowed to stir for 10 min at room temperature. A solution of 2,3-dihydro-lH-3a,6-diaza-cyclopenta[a] indene (0.10 g 0.63 mMol) in 0.1 ml dimethylformamide was added and the mixture was stirred at room temperature for 3h. The reaction was quenched with ice (ca 5g) and the pH was adjusted to 9 by addition of 28% sodium hydroxide. The mixture was heated to reflux for 10 min. cooled to room temperature and extracted with ethyl acetate(3x 5 ml) The combined organic extracts were dried with sodium sulfate and evaporated to dryness to yield the title compound (0.115 g, 97% Th). For analytical purposes a sample was recrystallised from ethyl acetate to afford slightly yellow crystals, mp 150- 151 °C. Found C, 70.94; H, 5.56; N, 14.97%; CnH10N2O requires C, 70.95; H, 5.41; N, 15.04%
c) 8-(2-Nitro-propenyl)-2,3-dihydro-lH-3a,6-diaza-cyclopenta[a]indene
To a solution of 2,3-dihydro- lH-3a,6-diaza-cyclopenta[a]indene-8-carbaldehyde (0.30g 1.6 mMol) in nitroethane (3.00 ml) was added ammonium acetate (0.30 g 3.9 mMol) and the mixture was heated to 100 °C for 4 h with stirring under argon. The mixture was cooled to room temperature and purified by chromatography on silicagel gel (ca 30 g) eluting first with ethyl acetate (ca 100 ml) then with a mixture of ethyl
acetate (9 parts) and methanol ( 1 part). The product fraction were combined, concentrated and the residue was recrystallised from ethyl acetate to yield the title compound (0.30 g, 77%) as yellow crystals, mp 141-142 C Found C, 64.05; H, 5.51; N, 17.14%; C13H13N3O2 requires C, 64.19; H, 5.39; N, 17.27%.
d) (R,S)-2-(2,3-Dihydro-lH-3a,6-diaza-cyclopenta[a]inden-8-yl)-l-methylethylamine dihydrochloride
To a solution of 8-(2-nitro-propenyl)-2,3-dihydro-lH-3a,6-diaza- cyclopenta[a] indene (0.200g 0.82 mMol) in tetrahydrofuran (2 ml) was added dropwise a IM solution of lithium aluminum hydride (2ml, 2 mMol)in THF at 0°C with stirring under argon. The mixture was then heated to reflux for 4 h, was cooled to 0 °C and a 10% solution of sodium-potassium tartrate in water (5 ml) was added with stirring. The mixture was briefly heated to reflux cooled to room temperature and filtered through a pad of dicalite. The clear filtrate was extracted with dichloromethane. The organic phase was dried with sodium sulfate evaporated and the residue was purified by chromatography on silica gel eluting with dichloromethane: methanol: cone. ammonia=9: 1:0.1 to yield the title compound as free base as a yellowish oil (90 mg; 51%). To a solution of this oil (80mg, 0.37 mMol) in tetrahydrofuran (3 ml) was added dropwise with stirring at room temperature a solution of hydrochloric acid in ether (0.2ml 5.5 M, l. lmMol). The resulting suspension was stirred at room temperature for 30 min and the solid was collected by filtration and dried to constant weight under high vacuum at 40 °C to yield the title compound ( 100 mg, 93%) as a white powder melting above 280 °C. Found C, 51.93; H 6.79; N.13.68 %; 3H19N3 + 0.73 mol water requires Q51.81; H,6.84; N.13.94 %.NMR δH (400 MHz DMSO-rf6) 1.25(d,J=6.4Hz,3H); 2.63(m,2H); 3.10(m,4H); 3.50 (m,lH); 4.27(t,J=7Hz,2H);
7.93(d,J=7Hz,lH); 8.0(s,broad,3H); 8.39(d,J=7Hz,lH); 9.30 (s,lH); 15.0(s,lH)ppm.
Example 2: (R,S)-2-(2,3-Dihydro-lH-3a,4-diaza-cyclopenta[a]inden-8-yl)- 1 -methylethylamine dihydrochloride
a) 3-(5-Chloropent-l-ynyl)-pyridin-2-ylamine
To a stirred solution of 2-amino-3-iodoaniline ( 13g) in triethylamine (260ml) were added bis(triphenylphosphine) palladium dichloride (2g) and copper (I) iodide ( 1.15g). The mixture was cooled to 5 °C before the addition of 5-chloro-l-pentyne (6.6ml). The mixture was heated to 50 °C and stirred 5h. The mixture was cooled to room temperature, filtered and evaporated. The residue was purified by column chromatography on silica gel (ethyl acetate/ hexane 1: 1 to 5:1 eluant) to afford 3-(5- chloropent- l-ynyl)-pyridin-2-ylamine as a red oil ( 10.6g, 92%): MS (El) 196,194 (M),159, 157, 131, 104; H NMR (δ, CDC13) 8.0 (dd,lH, J=2,5Hz), 7.47 (dd,lH, J=2,7Hz), 6.59 (dd,lH, J=5,7Hz), 4.94 (br s, 1H), 3.72 (t,2H, J=6Hz), 2.68 (t,2H, J=7Hz), 2.07 (dt,2H, J=6,7Hz) ppm.
b) 2-(3-Chloropropyl)-lH-pyrrolo[2,3-b]pyridine
3-(5-Chloropent-l-ynyl)-pyridin-2-ylamine ( 10.2g) was dissolved in acetonitrile ( 120ml) and the solution cooled to 5°C under a stream of argon. Trifluoroacetic anhydride ( 14.1ml) was added dropwise as a solution in acetonitrile ( 10ml). The mixture was stirred 2h at 0 °C and lOmin at room temperature. The solvent and excess reagent were evaporated under reduced pressure to afford the trifluoroacetate as a viscous oil (20g) that was used without further purification. The oil was dissolved in acetonitrile ( 120ml) and treated with palladium (II) chloride. The mixture was heated under argon 2h at 75 °C, cooled and evaporated under reduced pressure. The residue was taken up in ethyl acetate and the solution washed with 5% aqueous sodium
carbonate solution, brine, dried over sodium sulfate and evaporated. The residue was purified by column chromatography on silica gel (ethyl acetate/ hexane 1 :2 to 1:1 eluant) to afford 2-(3-chloro-propyl)-lH-pyrrolo[2,3-b]pyridine as a yellow oil (5.6g,
55%) which solidified on standing. Mp: 75 °C; MS ; Η NMR (δ, CDC13) 11.7 (s,lH), 8.25 (dd,lH, J=1.2,4.8Hz), 7.86 (dd,lH, J=1.2,8Hz), 7.06 (dd,lH, J=4.8,8Hz), 6.25 (s,lH), 3.63 (t,2H, J=6.4Hz), 3.08 (t,2H, J=7.6Hz), 2.29 (dt,2H, J=6.4,7.6Hz) ppm.
c) 2,3-Dihydro-lH-3a,4-diaza-cyclopenta[a]indene
2-(3-Chloro-propyl)- lH-pyrrolo[2,3-b]pyridine (5.6g) was dissolved in acetonitrile under a stream of argon. Potassium iodide (6g) was added, and sodium hydride in mineral oil (4.60g) added in small portions. After stirring 2h at room temperature, the mixture was poured onto a mixture of ice and saturated sodium hydrogencarbonate solution. The organics were extracted twice with ethyl acetate. The combined organic phases were washed with brine, dried over sodium sulfate and evaporated to afford 2,3-dihydro- lH-3a,4-diaza-cyclopenta[a]indene as a crude pale brown solid (4.5g, 99%), which was used without further purification. MS (El) 159 (M+H)+, 143, 100; 1H NMR (δ, CDC13) 8.19 (dd,lH, J=l,5Hz), 7.80 (dd,lH, J=l,8Hz), 6.99 (dd,lH, J=5,8Hz), 6.12 (s,lH), 4.22 (t,2H, J=6 Hz), 3.05 (t,2H, J=8 Hz), 2.63 (dt,2H, J=6,8 Hz) ppm.
d) 2,3-Dihydro-lH-3a,4-diaza-cyclopenta[a]indene-8-carbaldehyde
Phosphorus oxychloride (3.85ml) was added dropwise to N,N- dimethylformamide (25ml) cooled in an ice-bath. The mixture was stirred lOmin before the addition of 2,3-dihydro-lH-3a,4-diaza-cyclopenta[a] indene (4.40g) in N,N- dimethylformamide (7ml). The mixture was stirred 45min at 40 °C, cooled to room temperature and concentrated aqueous sodium hydroxide added dropwise to pHlO. The mixture was heated at 50°C lOmin, cooled to room temperature and poured onto crushed ice. The organics were extracted with ethyl acetate (2x), the combined organic phases washed with brine, dried over sodium sulfate and evaporated under reduced pressure. The residue was purified by column chromatography on silica gel (ethyl acetate /hexane 1:1 to 1:0) to afford 2,3-dihydro-lH-3a,4-diaza-cyclopenta[a] indene-8- carbaldehyde (2.4g, 46%) as a light orange oil which solidified on standing. Mp. 137-
141; MS (El): 187 (M+H)+, 143, 100; 1H NMR (δ, CDC13) 10.01 (s, 1H), 8.45 (dd, 1H, J=l,8Hz), 8.32 (dd, 1H, J=l ,5Hz), 7.23 (dd, 1H, J=5,8Hz), 4.31 (t, 2H, J=6 Hz), 3.38 (t, 2H, J=8 Hz), 2.76 (dt, 2H, J=6,8 Hz) ppm.
e) 8-(2-Nitropropenyl)-2,3-dihydro-lH-3a,4-diaza-cyclopenta[a]indene
A stirred solution of 2,3-dihydro- lH-3a,4-diaza-cyclopenta[a] indene-8- carbaldehyde (2.3g) and ammonium acetate ( 1.05g) in nitroethane was heated to 100°C for 2.5h, cooled to room temperature, and evaporated under reduced pressure. The residue was partitioned between water and ethyl acetate, the phases separated, the aqueous phase re-extracted with ethyl acetate. The combined organic phases were dried over sodium sulfate and evaporated under reduced pressure. The residue was purified by column chromatography on silica gel (ethyl acetate/hexane 2:1 to 4:1) to afford 8-(2- nitropropenyl)-2,3-dihydro- lH-3a,4-diaza-cyclopenta[a]indene as a yellow solid (2.4g, 80%); MS (El) 244 (M+H)\ 224, 195, 171; Η NMR (δ, CDC13) 8.31 (dd, 1H, J=l,5Hz), 8.29 (s, 1H), 7.92 (dd, 1H, J=l,8Hz), 7.16 (dd,lH, J=5,8Hz), 4.34 (t,2H, J=6 Hz), 3.18 (t,2H, J=8 Hz), 2.72 (dt,2H, J=6,8 Hz), 2.45 (s,3H) ppm.
f) (R,S)-2-(2,3-Dihydro-lH-3a,4-diaza-cyclopenta[a]inden-8-yl)-l-methylethylamine dihydrochloride
To lithium aluminium hydride (30mg) in tetrahydrofuran ( 1ml) at room temperature was slowly added a solution of 8-(2-nitropropenyl)-2,3-dihydro- lH-3a,4-diaza- cyclopenta[a]indene (98mg) in tetrahydrofuran ( 1ml). The mixture was heated at reflux for 3h, cooled to room temperature and IM aqueous sodium hydroxide solution added dropwise. The mixture was stirred 30min, and poured into ethyl acetate. The phases were separated, the aqueous phase re-extracted with ethyl acetate. The combined organic phases were washed with brine, dried over sodium sulfate and evaporated under reduced pressure. The residue was purified by column chromatography on silica gel (dichloromethane/methanol/ammonia 9:1:0.1 ) to afford (R,S)-2-(2,3-dihydro- lH- 3a,4-diaza-cyclopenta[a]inden-8-yl)- l-methyl-ethylamine. This was treated with a solution of hydrochloric acid in ether. The mixture was stirred 15min at room temperature and the solvent evaporated under reduced pressure. The residue was recrystallised from ethanol/ether to afford (R,S)-2-(2,3-dihydro- lH-3a,4-diaza- cyclopenta[a]inden-8-yl)- l-methylethylamine dihydrochloride as a white solid ( 18mg);
MS (El): 216 (M+H)\ 143, 117, 100; Η NMR (δ, d6-DMSO) 8.42 (d, 1H, J=8Hz), 8.3 (d, 1H, J=5Hz), 8.15 (br s, 2H), 7.35 (dd, 1H, J=5,8Hz), 5.1 (br s), 4.25 (t, 2H, J=5Hz), 3.4 (m, 1H), 3.05 (m, 2H), 2.95 (m.lH), 2.58 (t, 2H, J=6Hz), 1.24 (d, 3H, J=6Hz) ppm.
Example 3: (S)-2-(2,3-Dihydro-lH-3a,5-diaza-cyclopenta[a]inden-8-yl)-l-methyl- ethylamine
a) 2,3-Dihydro-lH-3a,5-diaza-cyclopenta[a]indene
A mixture of 0.2885g bis(triphenylphosphine) palladium dichloride and 0.1565g copper (I) iodide in 200 mL triethylamine was heated to reflux for 20 min. To the resulting solution was added at room temperature 25.00g N-(4-iodo-3-pyridinyl)-2,2-dimethyl- propanamide and 25.3g 5-chloro-l-pentyne and the mixture was heated to reflux for 30 min. The reaction mixture was distributed between water and ethyl acetate, the phases were separated and the organic phase was washed with water and brine, dried over magnesium sulfate and evaporated. The residue was taken up in 200mL tert-butanol and 18.45 g powdered potassium hydroxyde was added. The mixture was heated to reflux for 30 min. The reaction mixture was distributed between water and ethyl acetate, the phases were separated and the organic phase was washed with water and brine, dried over magnesium sulfate and evaporated. The residue was purified by chromatography on silica gel with ethyl acetate: methanol= 7:3 to yield 7.37 g 2,3- Dihydro-lH-3a,5-diaza-cyclopenta[a]indene as slightly yellow solid melting at 90-91°C
b) 8-Bromo-2,3-dihydro-lH-3a,5-diaza-cyclopenta[a]indene
To a solution of 1.58g in 15 ml dimethylformamide is added dropwise 20 ml of a 10% solution of bromine in dimethylformamide. The mixture was stirred at room temperature for 45 min. The reaction mixture was distributed between water and ethyl acetate, the phases were separated and the organic phase was washed with water and brine, dried over magnesium sulfate and evaporated. The residue was purified by chromatography on silica gel with ethyl acetate: methanol= 9: 1 and recrystallized from cyclohexane to yield 1.338g 8-bromo-2,3-dihydro- lH-3a,5-diaza-cyclopenta[a]indene as off white crystals melting at 110.8- 112°C.
c) (S)-2-(2,3-Dihydro-lH-3a,5-diaza-cyclopenta[ajinden-8-yl)- l-methyl-ethylamine
To a solution of 0.237g 8-bromo-2,3-dihydro-lH-3a,5-diaza-cyclopenta[a]indene in 3 ml tetrahydrofuran was added dropwise a 1.6M solution of n-butyl lithium in n-hexane during 15 min at -78°C. The mixture was stirred at -78°C for 30 min. To the resulting mixture was added (S)-4-Methyl-2,2-dioxo-[ l,2,3]oxathiazolidine-3-carboxylic acid tert-butyl ester at once. The mixture was allowed to warm to room temperature during 15 min. The reaction mixture was distributed between water and ethyl acetate, the phases were separated and the organic phase was washed with water and brine, dried over magnesium sulfate and evaporated. The residue was dissolved in 5 mL trifluoro acetic acid and kept at room temperature for 10 min. The solvent was evaporated and the residue was purified by chromatography on silica gel with dichloromethane : methanol : ammonia =9 : 1 : 01 to yield 0.045 g (S)-2-(2,3-Dihydro-lH-3a,5-diaza- cyclopenta[a]inden-8-yl)- l-methyl-ethylamine as a white solid.
MS: 216.4
d)(S)-4-Methyl-2,2-dioxo- [ l,2,3]oxathiazolidine-3-carboxylic acid tert-butyl ester
By the same general procedure as in Example 7b (S)-4-Methyl-2,2-dioxo- [ l,2,3]oxathiazolidine-3-carboxylic acid tert-butyl ester was obtained from (S)-BOC- alalinol as white crystals melting at 121.1-121.8°C after crystallisation from tert. butylmethlyether.
Example 4: (R)-2-(2,3-Dihydro-lH-3a,5-diaza-cyclopenta[a]inden-8-yl)-l-methyl- ethylamine
a) (R)-2-(2,3-Dihydro- lH-3a,5-diaza-cyclopenta[a] inden-8-yl)- l-methyl-ethylamine
By exactly the same procedure as in 3b the enantiomer (R)-2-(2,3-Dihydro-lH-3a,5- diaza-cyclopenta[a]inden-8-yl)-l-methyl-ethylamine was obtained from 8-bromo-2,3- dihydro-lH-3a,5-diaza-cyclopenta[a] indene in 3 ml tetrahydrofuran by using the R- enantiomeric sulfamidate (R)-4-Methyl-2,2-dioxo- [ l,2,3]oxathiazolidine-3-carboxylic acid tert-butyl ester.
MS: 216.4
b) (R)-4-Methyl-2,2-dioxo-2l 6-[ l,2,3] oxathiazolidine-3-carboxylic acid tert-butyl ester
By the same general procedure as in Example 7b (R)-4-Methyl-2,2-dioxo-
[ l,2,3]oxathiazolidine-3-carboxylic acid tert-butyl ester was obtained from (R)-BOC- alalinol as white crystals melting at 118.5-119.1°C after crystallisation from tert. butylmethlyether.
Example 5: (S)-2-(2,3-Dihydro-lH-3a,6-diaza-cyclopenta[a]inden-8-yl)-l-methyl- ethylamine
By the same general procedures as in example 3 (S)-2-(2,3-Dihydro- lH-3a,6-diaza- cyclopenta[a] inden-8-yl)-l-methyl-ethylamine was obtained from 8-Bromo-2,3- dihydro-lH-3a,6-diaza-cyclopenta[a]indene (MS: 238, 238) and (S)-4-Methyl-2,2- dioxo- [ 1,2,3] oxathiazolidine-3-carboxylic acid tert-butyl ester as white solid.
MS: 216.3
Example 6: (R)-2-(2,3-Dihydro-lH-3a,6-diaza-cyclopenta[a]inden-8-yl)-l-methyl- ethylamine
By the same general procedure as in example 3 (R)-2-(2,3-Dihydro-lH-3a,6-diaza- cyclopenta[a]inden-8-yl)-l-methyl-ethylamine was obtained from 8-Bromo-2,3- dihydro- lH-3a,6-diaza-cyclopenta[a] indene and (R)-4-Methyl-2,2-dioxo- [ l,2,3]oxathiazolidine-3-carboxylic acid tert-butyl ester as white solid.
MS: 216.3
The products from example 5 and 6 were both shown to be enantiomerically pure (>98%ee) by chiral GC on a BGB- 175 column.
Example 7: 2-(2,3-dihydro-lH-3a,6-diaza-cyclopenta[a]inden-8-yl)-ethylamine
7a) By the same general procedure as in example 3 there was obtained from 8-Bromo- 2,3-dihydro- lH-3a,6-diaza-cyclopenta[a]indene and 2,2-dioxo- [ 1,2,3] oxathiazolidine- 3-carboxylic acid tert-butyl ester after protecting group cleavage 2-(2,3-dihydro-lH- 3a,6-diaza-cyclopenta[a]inden-8-yl)-ethylamine as white solid.
MS: 201.2
7b) 2,2-Dioxo- [ l,2,3] oxathiazolidine-3-carboxylic acid tert-butyl ester
To a solution of 3.22 g BOC-glycinol in 30 ml tetrahydrofuran was added at -78°C 25 ml of a ca 1.6 M solution of n-butyllithium in n-hexane with stirring. The temperature rose to -45°C. The cooling bath was removed and the temperature was allowed to rise to 0°C during 30 min. The mixture was then cooled to -78°C and a solution of 2,376 g
thionylchloride in 15 ml THF which was cooled to -78°C in a jacketed dropping funnel was added at once with vigorous stirring. The temperature rose to ca -50°C. The cooling bath was replaced by an ice bath and the mixture was allowed to stir at 0°C for 30 min. The reaction mixture was distributed between water and ethyl aceate. The phases were separated and the organic phase was washed with 10% citric acid,10% sodium bicarbonate and brine, dried over magnesiumsulfate and purified by chromatography on silica gel with hexane : ethyl acetate = 1 : 1 to yield 2.00g of the sulfamidite inermediate as white crystals. To a solution of 1,75 g of this material in 20 ml ethyl acetate was added at 0°C 25 mL of a 10 % solution of sodiummetaperiodate in water. To the well stirred mixture was added 24 mg rutheniumdioxide hydrate. The mixture was stirred at 0°C for 30 min. The phases were separated and ca 2mL isoproanol was added to the organic phase. The organic phase was washed with 10 % citric acid, 10 % sodium bicarbonate and brine, dried with magnesium sulfate and evaporated to dryness. The solid product was recrystallized from t-butylmethylether to yield 1.24g 2,2-dioxo- [ l,2,3]oxathiazolidine-3-carboxylic acid tert-butyl ester as white crystals melting at 121.6- 122.1°C
Claims (1)
- Claims1. A chemical compound of formula (I):whereinn is 1, 2 or 3;X is nitrogen or CR4; X2 is nitrogen or CR5; X3 is nitrogen or CR6; X4 is nitrogen or CR ; wherein one or two of the X1, X", X' and X4 groups are nitrogen;R and R" are independently selected from hydrogen and alkyl;R" is hydrogen or alkyl;R to R are independently selected from hydrogen, halogen, hydroxy, alkyl, aryl, alkoxy, aryloxy, alkylthio, arylthio, alkylsulfonyl, alkylsulfoxyl, arylsulfonyl, arylsulfoxyl, amino, monoalkylamino, dialkylamino, nitro, cyano, carboxaldehyde, alkylcarbonyl, arylcarbonyl, aminocarbonyl, monoalkylaminocarbonyl, dialkylaminocarbonyl, aikoxycarbonylamino, aminocarbonyloxy, monoalkylaminocarbonyloxy, dialkylaminocarbonyloxy, monoalkylaminocarbonylamino and dialkylaminocarbonylamino, and wherein a carbon ring atom next to a nitrogen is not substituted by halogen;and pharmaceutically acceptable salts and prodrugs thereof.2. A compound according to claim 1, wherein the compound has the following formulawherein R to R" , X to X and n are defined as in claim 1.3. A compound according to claim 1 or 2 wherein two of the X , X", X" and X groups are nitrogen and these nitrogen atoms are in meta or para position 'to each other.4. A compound according to claim 1 or 2 wherein X is nitrogen, X" is CR , X" is CR6, and X4 is CR7.A compound according to claim 1 or 2 wherein X is CR ; X" is nitrogen; X" isCR° and X4 is CR6. A compound according to claim 1 or 2 wherein X is CR , X is CR ; X' is nitrogen and X4 CR7.7. A compound according to claim 1 or 2 wherein X1 is CR4, X2 is CR5; X' is CR and X is nitrogen.A compound according to any one of claims 1 to 3 wherein X is nitrogen, X" is CR"; X" is nitrogen and X is CR'.9. A compound according to any one of claims 1 to 3 wherein X is CR , X" is nitrogen, X3 is CR6 and X is nitrogen.10. A compound according to any one of claims 1 to 3 wherein X is nitrogen, X" is CR5, X" is CR6 and X4 is nitrogen.1 1. A compound according to any preceding claim wherein n=l .12. A compound according to any preceding claim wherein R and R" are hydrogen.13. A compound according to any one of claims 1 to 11 wherein R is hydrogen and R2 is alkyl.14. A compound according to any one of claims 1 to 11 wherein R1 is hydrogen and R" is arylalkyl.15. A compound according to any preceding claim wherein R" is methyl.16. A compounds according to any one of claims 1 to 14 wherein R is hydrogen.17. A compound according to any preceding claim wherein R to R are selected from hydrogen, halogen, hydroxy, alkyl, aryl, alkoxy, aryloxy, alkylthio, alkylsulfoxyl and alkylsulfonyl.18. A compound according to any preceding claim wherein R4 is hydrogen or halogen.19. A compound according to any preceding claim wherein R is other than hydrogen.20. A compound according to any preceding claim wherein R~ is selected from halogen, alkyl, alkoxy and alkylthio.21. A compound according to any preceding claim wherein R is other than hydrogen.22. A compound according to any preceding claim wherein R is selected from hydrogen and halogen.23. A compound according to any preceding claim wherein two or three of R , R", R and R are hydrogen.24. A compound according to any preceding claim wherein the compounds of formula (I) are selected from (R,S)-2-(2,3-dihydro- lH-3a,6-diaza- cyclopenta[a]inden-8-yl)-l-methyl-ethylamine and (R,S)-2-(2,3-dihydro-lH- 3a,4-diaza-cyclopenta[a]inden-8-yl)-l-methyl-ethylamine.25. A compound according to any preceding claim wherein the compounds of formula (I) are selected from (S)-2-(2,3-dihydro-lH-3a,5-diaza-cyclopenta[a] inden-8-yl)- l-methyl- ethylamine;(R)-2-(2,3-dihydro- lH-3a,5-diaza-cyclopenta[a]inden-8-yl)- l -methyl- ethylamine; > (S)-2-(2,3-dihydro-lH-3a,6-diaza-cyclopenta[a] inden-8-yl)- l-methyl- ethylamine;(R)-2-(2,3-dihydro- lH-3a,6-diaza-cyclopenta[a] inden-8-yl)- l-methyl- ethylamine; 2-(2,3-dihydro- lH-3a,6-diaza-cyclopenta[a]inden-8-yl)-ethylamine.26. A compound of formula (I) as set out in any one of claims 1 to 25 for use in therapy.27. The use of a compound of formula (I) as set out in any of claims 1 to 25 in the manufacture of a medicament comprising a compound as defined in any of claim 1 to 25 for the treatment of disorders of the central nervous system, damage to the central nervous system, cardiovascular disorders, gastrointestinal disorders, diabetes insipidus, and sleep apnoea.28. A use according to claim 27 wherein the disorders of the central nervous system are selected from depression, atypical depression, bipolar disorders, anxiety disorders, obsessive-compulsive disorders, social phobias or panic states, sleep disorders, sexual dysfunction, psychoses, schizophrenia, migraine and other conditions associated with cephalic pain or other pain, raised intracranial pressure, epilepsy, personality disorders, age-related behavioural disorders, behavioural disorders associated with dementia, organic mental disorders, mental disorders in childhood, aggressivity, age-related memory disorders, chronic fatigue syndrome, drug and alcohol addiction, obesity, bulimia, anorexia nervosa and premenstrual tension.29. A use according to claim 27 wherein the damage to the central nervous system is by trauma, stroke, neurodegenerative diseases or toxic or infective CNS diseases.30. A use according to claim 27 wherein said toxic or infective CNS disease is encephalitis or meningitis.31. A use according to claim 27 wherein the cardiovascular disorder is thrombosis.32. A use according to claim 27 wherein the gastrointestinal disorder is dysfunction of gastrointestinal motility.33. A use according to claim 27 wherein said medicament is for the treatment of obesity.34. A method of treatment of any of the disorders set out in claims 27 to 33 comprising administering to a patient in need of such treatment an effective dose of a compound of formula (I) as set out in any one of claims 1 to 25.35. A use or method according to any of claims 27 to 34 wherein said treatmentis prophylactic treatment.36. A method of preparing a compound according to any one of claims 1 to 25 by reduction or reductive alkylation of a compound of formula (VI).wherein X , X", X" , X , R and n are as defined in claim 1.37. A pharmaceutical composition comprising a compound of formula (I) as set out in any one of claims 1 to 25 in combination with a pharmaceutically acceptable carrier or excipient.38. A method of making a composition according to claim 37 comprising combining a compound of formula (I) as set out in any one of claims 1 to 25 with a pharmaceutically acceptable carrier or excipient.39. A method of treatment of obesity in a human in need of such treatment which comprises administration to the human a therapeutically effective amount of a compound according to any one of claims 1 to 25 and a therapeutically effective amount of a lipase inhibitor.40. The method according to claim 39, wherein the lipase inhibitor is orlistat.41. The use of a compound according to any one of claims 1 to 25 in the manufacture of a medicament for the treatment and prevention of obesity in a patient who is also receiving treatment with a lipase inhibitor.42. The use according to claim 41, wherein the lipase inhibitor is orlistat.43. The pharmaceutical composition according to claim 37 comprising further a therapeutically effective amount of a lipase inhibitor.44. The pharmaceutical composition according to claim 43, wherein the lipase inhibitor is orlistat.46. The invention as hereinbefore defined.
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- 2000-03-06 EP EP00301814A patent/EP1132389A1/en not_active Withdrawn
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- 2001-03-02 AU AU4067001A patent/AU4067001A/en active Pending
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