IL105264A - Pyrimidine derivatives processes for the preparation thereof and pharmaceutical compositions containing them - Google Patents
Pyrimidine derivatives processes for the preparation thereof and pharmaceutical compositions containing themInfo
- Publication number
- IL105264A IL105264A IL10526493A IL10526493A IL105264A IL 105264 A IL105264 A IL 105264A IL 10526493 A IL10526493 A IL 10526493A IL 10526493 A IL10526493 A IL 10526493A IL 105264 A IL105264 A IL 105264A
- Authority
- IL
- Israel
- Prior art keywords
- phenyl
- lower alkyl
- pyridyl
- formula
- compound
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 53
- 230000008569 process Effects 0.000 title claims description 22
- 238000002360 preparation method Methods 0.000 title claims description 15
- 239000008194 pharmaceutical composition Substances 0.000 title claims description 9
- 229940083082 pyrimidine derivative acting on arteriolar smooth muscle Drugs 0.000 title description 3
- 150000003230 pyrimidines Chemical class 0.000 title description 2
- -1 4-pyrazinyl Chemical group 0.000 claims abstract description 161
- 150000001875 compounds Chemical class 0.000 claims abstract description 138
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 90
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 66
- 239000001257 hydrogen Substances 0.000 claims abstract description 64
- 150000002431 hydrogen Chemical class 0.000 claims abstract description 35
- 125000003545 alkoxy group Chemical group 0.000 claims abstract description 33
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 30
- 125000004432 carbon atom Chemical group C* 0.000 claims abstract description 27
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 claims abstract description 27
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims abstract description 24
- 125000003277 amino group Chemical group 0.000 claims abstract description 23
- 125000004076 pyridyl group Chemical group 0.000 claims abstract description 22
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims abstract description 21
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical group [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 20
- 239000001301 oxygen Substances 0.000 claims abstract description 20
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims abstract description 20
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 16
- 125000004043 oxo group Chemical group O=* 0.000 claims abstract description 16
- 125000001589 carboacyl group Chemical group 0.000 claims abstract description 15
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 claims abstract description 15
- 125000003118 aryl group Chemical group 0.000 claims abstract description 11
- 206010028980 Neoplasm Diseases 0.000 claims abstract description 10
- 125000002757 morpholinyl group Chemical class 0.000 claims abstract description 10
- 125000003386 piperidinyl group Chemical class 0.000 claims abstract description 10
- 125000001841 imino group Chemical group [H]N=* 0.000 claims abstract description 8
- 125000000719 pyrrolidinyl group Chemical class 0.000 claims abstract description 8
- 125000000446 sulfanediyl group Chemical group *S* 0.000 claims abstract description 8
- 125000005277 alkyl imino group Chemical group 0.000 claims abstract description 7
- 125000000623 heterocyclic group Chemical group 0.000 claims abstract description 7
- 150000003839 salts Chemical class 0.000 claims description 88
- 125000001424 substituent group Chemical group 0.000 claims description 32
- 238000006243 chemical reaction Methods 0.000 claims description 26
- 150000001721 carbon Chemical group 0.000 claims description 21
- 229910052736 halogen Inorganic materials 0.000 claims description 18
- 150000002367 halogens Chemical class 0.000 claims description 18
- 125000006239 protecting group Chemical group 0.000 claims description 17
- 125000003282 alkyl amino group Chemical group 0.000 claims description 15
- 125000000524 functional group Chemical group 0.000 claims description 11
- 125000004453 alkoxycarbonyl group Chemical group 0.000 claims description 10
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 10
- 125000004433 nitrogen atom Chemical group N* 0.000 claims description 9
- 125000004093 cyano group Chemical group *C#N 0.000 claims description 8
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical group [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 7
- 241001465754 Metazoa Species 0.000 claims description 7
- 239000000460 chlorine Chemical group 0.000 claims description 7
- 229910052801 chlorine Inorganic materials 0.000 claims description 7
- 125000004356 hydroxy functional group Chemical group O* 0.000 claims description 7
- UHOVQNZJYSORNB-UHFFFAOYSA-N monobenzene Natural products C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 5
- CIUQDSCDWFSTQR-UHFFFAOYSA-N [C]1=CC=CC=C1 Chemical compound [C]1=CC=CC=C1 CIUQDSCDWFSTQR-UHFFFAOYSA-N 0.000 claims description 5
- 125000004423 acyloxy group Chemical group 0.000 claims description 5
- 125000003236 benzoyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C(*)=O 0.000 claims description 5
- 125000000753 cycloalkyl group Chemical group 0.000 claims description 5
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 claims description 5
- 125000001544 thienyl group Chemical group 0.000 claims description 5
- 229910052731 fluorine Inorganic materials 0.000 claims description 4
- 239000011737 fluorine Substances 0.000 claims description 4
- 125000005842 heteroatom Chemical group 0.000 claims description 4
- 229910052717 sulfur Inorganic materials 0.000 claims description 4
- 125000001622 2-naphthyl group Chemical group [H]C1=C([H])C([H])=C2C([H])=C(*)C([H])=C([H])C2=C1[H] 0.000 claims description 3
- 125000005236 alkanoylamino group Chemical group 0.000 claims description 3
- 239000003937 drug carrier Substances 0.000 claims description 3
- 125000001153 fluoro group Chemical group F* 0.000 claims description 3
- 239000007800 oxidant agent Substances 0.000 claims description 3
- 239000011593 sulfur Substances 0.000 claims description 3
- 125000000392 cycloalkenyl group Chemical group 0.000 claims description 2
- 125000002795 guanidino group Chemical group C(N)(=N)N* 0.000 claims description 2
- 125000004193 piperazinyl group Chemical group 0.000 claims description 2
- LLJRXVHJOJRCSM-UHFFFAOYSA-N 3-pyridin-4-yl-1H-indole Chemical group C=1NC2=CC=CC=C2C=1C1=CC=NC=C1 LLJRXVHJOJRCSM-UHFFFAOYSA-N 0.000 claims 1
- 102100035189 GPI ethanolamine phosphate transferase 1 Human genes 0.000 claims 1
- 101710120219 GPI ethanolamine phosphate transferase 1 Proteins 0.000 claims 1
- DTCFXYVLDFXFEA-UHFFFAOYSA-N n-(3-nitrophenyl)-4-pyridin-2-ylpyrimidin-2-amine Chemical compound [O-][N+](=O)C1=CC=CC(NC=2N=C(C=CN=2)C=2N=CC=CC=2)=C1 DTCFXYVLDFXFEA-UHFFFAOYSA-N 0.000 claims 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 abstract description 18
- 238000002560 therapeutic procedure Methods 0.000 abstract description 2
- 150000004046 2-(N-anilino)pyrimidines Chemical class 0.000 abstract 1
- 125000002883 imidazolyl group Chemical group 0.000 abstract 1
- 125000001041 indolyl group Chemical group 0.000 abstract 1
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 113
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 65
- 239000002253 acid Substances 0.000 description 50
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 40
- 150000003254 radicals Chemical class 0.000 description 38
- 239000000203 mixture Substances 0.000 description 35
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 23
- 239000007858 starting material Substances 0.000 description 22
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 20
- JUJWROOIHBZHMG-UHFFFAOYSA-N pyridine Substances C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 19
- 108090000315 Protein Kinase C Proteins 0.000 description 18
- 102000003923 Protein Kinase C Human genes 0.000 description 18
- 239000004480 active ingredient Substances 0.000 description 16
- 239000000243 solution Substances 0.000 description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 15
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 15
- 239000000725 suspension Substances 0.000 description 14
- 150000008064 anhydrides Chemical class 0.000 description 13
- 210000004027 cell Anatomy 0.000 description 13
- 239000003795 chemical substances by application Substances 0.000 description 13
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 11
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 11
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 11
- 238000001816 cooling Methods 0.000 description 11
- 230000002401 inhibitory effect Effects 0.000 description 11
- 150000002148 esters Chemical class 0.000 description 10
- 229960004592 isopropanol Drugs 0.000 description 10
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 9
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 9
- 229920002472 Starch Polymers 0.000 description 9
- 235000011114 ammonium hydroxide Nutrition 0.000 description 9
- 238000001035 drying Methods 0.000 description 9
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 9
- 238000010992 reflux Methods 0.000 description 9
- XZMCDFZZKTWFGF-UHFFFAOYSA-N Cyanamide Chemical compound NC#N XZMCDFZZKTWFGF-UHFFFAOYSA-N 0.000 description 8
- 108091008606 PDGF receptors Proteins 0.000 description 8
- 102000011653 Platelet-Derived Growth Factor Receptors Human genes 0.000 description 8
- DTQVDTLACAAQTR-UHFFFAOYSA-N Trifluoroacetic acid Chemical compound OC(=O)C(F)(F)F DTQVDTLACAAQTR-UHFFFAOYSA-N 0.000 description 8
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 8
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 8
- 230000005764 inhibitory process Effects 0.000 description 8
- 239000002904 solvent Substances 0.000 description 8
- 229940100445 wheat starch Drugs 0.000 description 8
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 7
- 102000010780 Platelet-Derived Growth Factor Human genes 0.000 description 7
- 108010038512 Platelet-Derived Growth Factor Proteins 0.000 description 7
- 102000004022 Protein-Tyrosine Kinases Human genes 0.000 description 7
- 108090000412 Protein-Tyrosine Kinases Proteins 0.000 description 7
- 201000010099 disease Diseases 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 238000001914 filtration Methods 0.000 description 7
- HQKMJHAJHXVSDF-UHFFFAOYSA-L magnesium stearate Substances [Mg+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O HQKMJHAJHXVSDF-UHFFFAOYSA-L 0.000 description 7
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 6
- 150000001718 carbodiimides Chemical class 0.000 description 6
- 239000003054 catalyst Substances 0.000 description 6
- 238000009833 condensation Methods 0.000 description 6
- 230000005494 condensation Effects 0.000 description 6
- 238000006722 reduction reaction Methods 0.000 description 6
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 6
- 235000012239 silicon dioxide Nutrition 0.000 description 6
- 239000000454 talc Substances 0.000 description 6
- 235000012222 talc Nutrition 0.000 description 6
- 229910052623 talc Inorganic materials 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000005406 washing Methods 0.000 description 6
- MZLRFUCMBQWLNV-UHFFFAOYSA-N 3-(dimethylamino)-1-pyridin-3-ylprop-2-en-1-one Chemical compound CN(C)C=CC(=O)C1=CC=CN=C1 MZLRFUCMBQWLNV-UHFFFAOYSA-N 0.000 description 5
- 102000004190 Enzymes Human genes 0.000 description 5
- 108090000790 Enzymes Proteins 0.000 description 5
- 125000001931 aliphatic group Chemical group 0.000 description 5
- 239000012298 atmosphere Substances 0.000 description 5
- 239000002585 base Substances 0.000 description 5
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 5
- 239000007795 chemical reaction product Substances 0.000 description 5
- 239000003814 drug Substances 0.000 description 5
- 230000007062 hydrolysis Effects 0.000 description 5
- 238000006460 hydrolysis reaction Methods 0.000 description 5
- 229910052763 palladium Inorganic materials 0.000 description 5
- 239000011541 reaction mixture Substances 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 239000002002 slurry Substances 0.000 description 5
- 201000001320 Atherosclerosis Diseases 0.000 description 4
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
- GUBGYTABKSRVRQ-QKKXKWKRSA-N Lactose Natural products OC[C@H]1O[C@@H](O[C@H]2[C@H](O)[C@@H](O)C(O)O[C@@H]2CO)[C@H](O)[C@@H](O)[C@H]1O GUBGYTABKSRVRQ-QKKXKWKRSA-N 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 102000001253 Protein Kinase Human genes 0.000 description 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 4
- 230000002378 acidificating effect Effects 0.000 description 4
- 125000002252 acyl group Chemical group 0.000 description 4
- 229910052783 alkali metal Inorganic materials 0.000 description 4
- 125000004466 alkoxycarbonylamino group Chemical group 0.000 description 4
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 4
- 230000001419 dependent effect Effects 0.000 description 4
- 229940079593 drug Drugs 0.000 description 4
- 239000000543 intermediate Substances 0.000 description 4
- 239000008101 lactose Substances 0.000 description 4
- 235000019359 magnesium stearate Nutrition 0.000 description 4
- VBYYPCNNGNGURO-UHFFFAOYSA-N nitric acid;2-(3-nitrophenyl)guanidine Chemical compound O[N+]([O-])=O.NC(N)=NC1=CC=CC([N+]([O-])=O)=C1 VBYYPCNNGNGURO-UHFFFAOYSA-N 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 108060006633 protein kinase Proteins 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 238000003797 solvolysis reaction Methods 0.000 description 4
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 4
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 description 4
- NHQDETIJWKXCTC-UHFFFAOYSA-N 3-chloroperbenzoic acid Chemical compound OOC(=O)C1=CC=CC(Cl)=C1 NHQDETIJWKXCTC-UHFFFAOYSA-N 0.000 description 3
- ZQTRXPRIWRFHRY-UHFFFAOYSA-N 3-n-(4-pyridin-3-ylpyrimidin-2-yl)benzene-1,3-diamine Chemical compound NC1=CC=CC(NC=2N=C(C=CN=2)C=2C=NC=CC=2)=C1 ZQTRXPRIWRFHRY-UHFFFAOYSA-N 0.000 description 3
- 125000003349 3-pyridyl group Chemical group N1=C([H])C([*])=C([H])C([H])=C1[H] 0.000 description 3
- RKIDDEGICSMIJA-UHFFFAOYSA-N 4-chlorobenzoyl chloride Chemical compound ClC(=O)C1=CC=C(Cl)C=C1 RKIDDEGICSMIJA-UHFFFAOYSA-N 0.000 description 3
- NQUVCRCCRXRJCK-UHFFFAOYSA-N 4-methylbenzoyl chloride Chemical compound CC1=CC=C(C(Cl)=O)C=C1 NQUVCRCCRXRJCK-UHFFFAOYSA-N 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- 239000005711 Benzoic acid Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- 150000007513 acids Chemical class 0.000 description 3
- 238000006136 alcoholysis reaction Methods 0.000 description 3
- 235000010233 benzoic acid Nutrition 0.000 description 3
- 125000001584 benzyloxycarbonyl group Chemical group C(=O)(OCC1=CC=CC=C1)* 0.000 description 3
- PFKFTWBEEFSNDU-UHFFFAOYSA-N carbonyldiimidazole Chemical compound C1=CN=CN1C(=O)N1C=CN=C1 PFKFTWBEEFSNDU-UHFFFAOYSA-N 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 238000004587 chromatography analysis Methods 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 239000000706 filtrate Substances 0.000 description 3
- 238000003818 flash chromatography Methods 0.000 description 3
- 125000002485 formyl group Chemical group [H]C(*)=O 0.000 description 3
- 238000005984 hydrogenation reaction Methods 0.000 description 3
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 235000010755 mineral Nutrition 0.000 description 3
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- 125000001181 organosilyl group Chemical group [SiH3]* 0.000 description 3
- UYWQUFXKFGHYNT-UHFFFAOYSA-N phenylmethyl ester of formic acid Natural products O=COCC1=CC=CC=C1 UYWQUFXKFGHYNT-UHFFFAOYSA-N 0.000 description 3
- 230000026731 phosphorylation Effects 0.000 description 3
- 238000006366 phosphorylation reaction Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- HFAFXVOPGDBAOK-UHFFFAOYSA-M pyridine-2-carboxylate;hydrochloride Chemical compound [Cl-].OC(=O)C1=CC=CC=N1 HFAFXVOPGDBAOK-UHFFFAOYSA-M 0.000 description 3
- 102000005962 receptors Human genes 0.000 description 3
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- 241000894007 species Species 0.000 description 3
- 125000005931 tert-butyloxycarbonyl group Chemical group [H]C([H])([H])C(OC(*)=O)(C([H])([H])[H])C([H])([H])[H] 0.000 description 3
- 229920001567 vinyl ester resin Polymers 0.000 description 3
- RXYPXQSKLGGKOL-UHFFFAOYSA-N 1,4-dimethylpiperazine Chemical compound CN1CCN(C)CC1 RXYPXQSKLGGKOL-UHFFFAOYSA-N 0.000 description 2
- NHBKXEKEPDILRR-UHFFFAOYSA-N 2,3-bis(butanoylsulfanyl)propyl butanoate Chemical compound CCCC(=O)OCC(SC(=O)CCC)CSC(=O)CCC NHBKXEKEPDILRR-UHFFFAOYSA-N 0.000 description 2
- CVKKTGQSXNZVKW-UHFFFAOYSA-N 2-(3-methyl-5-nitrophenyl)guanidine;nitric acid Chemical compound O[N+]([O-])=O.CC1=CC(N=C(N)N)=CC([N+]([O-])=O)=C1 CVKKTGQSXNZVKW-UHFFFAOYSA-N 0.000 description 2
- NGNBDVOYPDDBFK-UHFFFAOYSA-N 2-[2,4-di(pentan-2-yl)phenoxy]acetyl chloride Chemical compound CCCC(C)C1=CC=C(OCC(Cl)=O)C(C(C)CCC)=C1 NGNBDVOYPDDBFK-UHFFFAOYSA-N 0.000 description 2
- RZNHSEZOLFEFGB-UHFFFAOYSA-N 2-methoxybenzoyl chloride Chemical compound COC1=CC=CC=C1C(Cl)=O RZNHSEZOLFEFGB-UHFFFAOYSA-N 0.000 description 2
- WEGYGNROSJDEIW-UHFFFAOYSA-N 3-Acetylpyridine Chemical compound CC(=O)C1=CC=CN=C1 WEGYGNROSJDEIW-UHFFFAOYSA-N 0.000 description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 2
- KNBRFZWWCBSGDU-UHFFFAOYSA-N 4-[(4-methylpiperazin-1-yl)methyl]benzoyl chloride Chemical compound C1CN(C)CCN1CC1=CC=C(C(Cl)=O)C=C1 KNBRFZWWCBSGDU-UHFFFAOYSA-N 0.000 description 2
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 2
- 238000006418 Brown reaction Methods 0.000 description 2
- FBPFZTCFMRRESA-KVTDHHQDSA-N D-Mannitol Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-KVTDHHQDSA-N 0.000 description 2
- ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 description 2
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- JVBXVOWTABLYPX-UHFFFAOYSA-L sodium dithionite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])=O JVBXVOWTABLYPX-UHFFFAOYSA-L 0.000 description 1
- RZWQDAUIUBVCDD-UHFFFAOYSA-M sodium;benzenethiolate Chemical compound [Na+].[S-]C1=CC=CC=C1 RZWQDAUIUBVCDD-UHFFFAOYSA-M 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000012265 solid product Substances 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000005720 sucrose Substances 0.000 description 1
- 239000003765 sweetening agent Substances 0.000 description 1
- 208000011580 syndromic disease Diseases 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 125000003718 tetrahydrofuranyl group Chemical group 0.000 description 1
- 125000003396 thiol group Chemical group [H]S* 0.000 description 1
- QIQITDHWZYEEPA-UHFFFAOYSA-N thiophene-2-carbonyl chloride Chemical compound ClC(=O)C1=CC=CS1 QIQITDHWZYEEPA-UHFFFAOYSA-N 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 1
- 230000000699 topical effect Effects 0.000 description 1
- 238000005809 transesterification reaction Methods 0.000 description 1
- PNQBEPDZQUOCNY-UHFFFAOYSA-N trifluoroacetyl chloride Chemical compound FC(F)(F)C(Cl)=O PNQBEPDZQUOCNY-UHFFFAOYSA-N 0.000 description 1
- 125000000876 trifluoromethoxy group Chemical group FC(F)(F)O* 0.000 description 1
- 125000000026 trimethylsilyl group Chemical group [H]C([H])([H])[Si]([*])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 230000001173 tumoral effect Effects 0.000 description 1
- 238000010518 undesired secondary reaction Methods 0.000 description 1
- 208000010570 urinary bladder carcinoma Diseases 0.000 description 1
- 238000001262 western blot Methods 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
- 229940001158 ximino Drugs 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D239/00—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings
- C07D239/02—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings
- C07D239/24—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members
- C07D239/28—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, directly attached to ring carbon atoms
- C07D239/32—One oxygen, sulfur or nitrogen atom
- C07D239/42—One nitrogen atom
-
- 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
- C07D401/04—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 directly linked by a ring-member-to-ring-member bond
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/495—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with two or more nitrogen atoms as the only ring heteroatoms, e.g. piperazine or tetrazines
- A61K31/505—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P35/00—Antineoplastic agents
-
- 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
- C07D401/14—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 three or more hetero rings
Abstract
There are described N-phenyl-2-pyrimidinamine derivatives of the formula I <IMAGE> in which R1 denotes 4-pyrazinyl, 1-methyl-1H-pyrrolyl, phenyl substituted by amino or amino-lower alkyl, in which the amino group is in each case free, alkylated or acylated, 1H-indolyl or 1H-imidazolyl bonded to a five-membered ring carbon atom, or pyridyl which is bonded to a ring carbon atom, unsubstituted or substituted by lower alkyl and unsubstituted or substituted by oxygen on the nitrogen, R2 and R3 independently of one another each denote hydrogen or lower alkyl, one or two of the radicals R4, R5, R6, R7 and R8 each denote nitro, fluorine-substituted lower alkoxy or a radical of the formula II -N(R9)-C(=X)-Y)n-R10 (II> in which R9 stands for hydrogen or lower alkyl, X stands for oxo, thio, imino, N-lower alkylimino, hydroximino or O-lower alkylhydroxyimino, Y stands for oxygen or the group NH, n stands for 0 or 1 and R10 stands for an aliphatic radical having at least 5 C atoms or for an aromatic, aromatic-aliphatic, cycloaliphatic, cycloaliphatic-aliphatic, heterocyclic or heterocyclic-aliphatic radical, and the remainder of the radicals R4, R5, R6, R7 and R8 independently of one another each denote hydrogen, lower alkyl which is unsubstituted or substituted by free or alkylated amino, piperazinyl, piperidinyl, pyrrolidinyl or morpholinyl, lower alkanoyl, trifluoromethyl, free, etherified or esterified hydroxyl, free, alkylated or acylated amino or free or esterified carboxyl. These compounds can be used e.g. for the therapy of cancers.
[EP0564409A1]
Description
105264/2 PYRIMIDINE DERIVATIVES, PROCESSES FOR THE PREPARATION THEREOF AND PHARMACEUTICAL COMPOSITIONS CONTAINING THEM "lniN D^ onn mnpii ^Din iman mo^u; , τ IT Ώ Ι Ο ηπίηη \ 4-19046/A Pyrimidine derivatives and processes for the preparation thereof The invention relates to N-phenyl-2-pyrimidine-arnine derivatives, to processes for the preparation thereof, to medicaments comprising those compounds, and to the use thereof in the preparation of pharmaceutical compositions for the therapeutic treatment of warm-blooded animals.
The invention relates to N-phenyl-2-pyriniiaUne-arnine derivatives of formula I wherein Rj is 4-pyrazinyl, 1 -methyl- lH-pyrrolyl, amino- or amino-lower alkyl-substituted phenyl wherein the amino group in each case is free, alkylated or acylated, lH-indolyl or lH-imidazolyl bonded at a five-membered ring carbon atom, or unsubstituted or lower alkyl-substituted pyridyl bonded at a ring carbon atom and unsubstituted or substituted at the nitrogen atom by oxygen, R2 and R3 are each independently of the other hydrogen or lower alkyl, Where underli ned : . one or two of the radicals R4, R5, R6, R7 and R8 are each nitro. fluoro-substituted lower 1 .4.93 alkoxy or a radical of formula II -N(R9)-C(=X)-(Y)n (Π), wherein R9 is hydrogen or lower alkyl, X is oxo, thio, imino, N-lower alkyl-imino, hydroximino or O-lowcr alkyl-hydrox- imino, Y is oxygen or the group H, n is 0 or 1 and Rio is an aliphatic radical having at least 5 carbon atoms, or an aromatic, aromatic- aliphatic, cycloaliphatic, cycloaliphatic-aliphatic, heterocyclic or heterocyclic- aliphatic radical, and the remaining radicals R4, R5, Rg, R7 and R8 are each independently of the others hydrogen, lower alkyl that is unsubstituted or substituted by free or alkylated amino, piperazinyl, piperidinyl, pyrrolidinyl or by morpholinyl, or lower alkanoyl, trifluoro- methyl, free, etherified or esterifed hydroxy, free, alkylated or acylated amino or free or esterified carboxy, and to salts of such compounds having at least one salt-forming group. 1 -Methyl- IH-pyrrolyl is preferably l-methyl-lH-pyrrpl-2-yl or 1 -methyl- lH-pyrrol-3-yl.
Amino- or amino-lower alkyl-substituted phenyl R} wherein the amino group in each case is free, alkylated or acylated is phenyl substituted in any desired position (ortho, meta or para) wherein an alkylated amino group is preferably mono- or di-lower alkylamino, for example dimethylamino, and the lower alkyl moiety of amino-lower alkyl is preferably linear C1-C3alkyl, such as especially methyl or ethyl. lH-Indolyl bonded at a carbon atom of the five-membered ring is lH-indol-2-yl or lH-indol-3-yl.
Unsubstituted or lower alkyl-substituted pyridyl bonded at a ring carbon atom is lower alkyl-substituted or preferably unsubstituted 2-, 4- or preferably 3-pyridyl, for example 3-pyridyl, 2-methyl-3-pyridyl or 4-methyl-3-pyridyl. Pyridyl substituted at the nitrogen atom by oxygen is a radical derived from pyridine N-oxide, i.e. N-oxido-pyridyL Fluoro-substituted lower alkoxy is lower alkoxy carrying at least one, but preferably several, fluoro substituents, especially trifluoromethoxy or 1,1,2,2-tetrafluoro-ethoxy.
When X is oxo, thio, irnino, N-lower allcyl-imino, hydroximino or O-lower alkyl-hydrox-imino, the group C=X is, in the above order, a radical C=0, C=S, C=N-H, C=N-lower alkyl, C=N-OH or C=N-0-lower alkyl, respectively. X is preferably oxo. n is preferably 0, i.e. the group Y is not present.
Y, if present, is preferably the group NH.
The term "lower" within the scope of this text denotes radicals having up to and including 7, preferably up to and including 4 carbon atoms.
Lower alkyl Rlt R2, R3 and R9 is preferably methyl or ethyl.
An aliphatic radical having at least 5 carbon atoms preferably has not more than 22 carbon atoms, generally not more than 10 carbon atoms, and is such a substituted or preferably unsubstituted aliphatic hydrocarbon radical, that is to say such a substituted or preferably unsubstituted alkynyl, alkenyl or preferably alkyl radical, such as Gg-Cralkyl, for example n-pentyl. An aromatic radical Rjo has up to 20 carbon atoms and is unsubstituted or substituted, for example in each case unsubstituted or substituted naphthyl, such as especially 2-naphthyl, or preferably phenyl, the substituents preferably being selected from cyano, unsubstituted or hydroxy-, amino- or 4-methyl-piperazinyl-substituted lower alkyl, such as especially methyl, trifluoromethyl, free, etherified or esterified hydroxy, free, alkylated or acylated amino and free or esterified carboxy. In an aromatic-aliphatic radical R10 the aromatic moiety is as defined above and the aliphatic moiety is preferably lower alkyl, such as especially C1-C2alkyl, which is substituted or preferably unsubstituted, for example benzyl. A cycloaliphatic radical Rio has especially up to 30, more especially up to 20, and most especially up to 10 carbon atoms, is mono- or poly-cyclic and is substituted or preferably unsubstituted, for example such a cycloalkyl radical, especially such a 5- or 6-membered cycloalkyl radical, such as preferably cyclo-hexyl. In a cycloaliphatic -aliphatic radical R^ the cycloaliphatic moiety is as defined above and the aliphatic moiety is preferably lower alkyl, such as especially C^Qalkyl, which is substituted or preferably unsubstituted. A heterocyclic radical Rio contains especially up to 20 carbon atoms and is preferably a saturated or unsaturated monocyclic radical having 5 or 6 ring members and 1-3 hetero atoms which are preferably selected from nitrogen, oxygen and sulfur, especially, for example, thienyl or2-, 3- or 4-pyridyl, or a bi- or tri-cyclic radical wherein, for example, one or two benzene radicals are annellated (fused) to the mentioned monocyclic radical. In a heterocyclic-aliphatic radical R^ the heterocyclic moiety is as defined above and the aliphatic moiety is preferably lower alkyl, such as especially Ct -Chalky 1, which is substituted or preferably unsubstituted.
Etherified hydroxy is preferably lower alkoxy. Esterified hydroxy is preferably hydroxy esterified by an organic carboxylic acid, such as a lower alkanoic acid, or a mineral acid, such as a hydrohalic acid, for example lower alkanoyloxy or especially halogen, such as iodine, bromine or especially fluorine or chlorine.
Alkylated amino is, for example, lower alkylamino, such as methylamino, or di-lower alkylamino, such as dimethylamino. Acylated amino is, for example, lower alkanoyl-amino or benzoylamino.
Esterified carboxy is, for example, lower alkoxycarbonyl, such as methoxycarbonyl.
A substituted phenyl radical may carry up to 5 substituents, such as fluorine, but especially in the case of relatively large substituents is generally substituted by only from 1 to 3 substituents. Examples of substituted phenyl that may be given special mention are 4-chloro-phenyl, pentafluoro-phenyl, 2-carboxy-phenyl, 2-methoxy-phenyl, 4-fluoro-phenyl, 4-cyano-phenyl and 4-methyl-phenyl.
Salt-forming groups in a compound of formula I are groups or radicals having basic or acidic properties. Compounds having at least one basic group or at least one basic radical, for example a free amino group, a pyrazinyl radical or a pyridyl radical, may form acid addition salts, for example with inorganic acids, such as hydrochloric acid, sulfuric acid or a phosphoric acid, or with suitable organic carboxylic or sulfonic acids, for example aliphatic mono- or di-carboxylic acids, such as trifluoroacetic acid, acetic acid, propionic acid, glycolic acid, succinic acid, maleic acid, fumaric acid, hydroxymaleic acid, malic acid, tartaric acid, citric acid or oxalic acid, or amino acids such as arginine or lysine, aromatic carboxylic acids, such as benzoic acid, 2-phenoxy-benzoic acid, 2-acetoxy-benzoic acid, salicylic acid, 4-aminosalicylic acid, aromatic-aliphatic carboxylic acids, such as mandelic acid or cinnamic acid, heteroaromatic carboxylic acids, such as nicotinic acid or isonicotirtic acid, aliphatic sulfonic acids, such as methane-, ethane- or 2-hydroxy-ethane-sulfonic acid, or aromatic sulfonic acids, for example benzene-, p-toluene- or naphthalene-2-sulfonic acid. When several basic groups are present mono- or poly-acid addition salts may be formed.
Compounds of formula I having acidic groups, for example a free carboxy group in the radical RJO, may form metal or ammonium salts, such as alkali metal or alkaline earth metal salts, for example sodium, potassium, magnesium or calcium salts, or ammonium salts with ammonia or suitable organic amines, such as tertiary monoamines, for example triethylamine or tri-(2-hydroxyetliyl)-amine, or heterocyclic bases, for example N-ethyl- piperidine or N,N'-dimethyl-piperazine.
Compounds of formula I having both acidic and basic groups can form internal salts.
For the purposes of isolation or purification, as well as in the case of compounds that are used further as intermediates, it is also possible to use pharmaceutically unacceptable salts. Only phannaceutically acceptable, non-toxic salts are used for tlierapeutic purposes, however, and those salts are therefore preferred.
Owing to the close relationship between the novel compounds in free form and in the form of their salts, including those salts that can be used as intermediates, for example in the purification of the novel compounds or for the identification thereof, hereinbefore and hereinafter any reference to the free compounds should be understood as including the corresponding salts, where appropriate and expedient.
US-patents 4,876,252 and 4,788,195 do not overlap with the present application because the substituent R appearing in the moiety -NH-C(=0)-R of said patents is expressly defined as "alkyl(Cr C3)". Contrary thereto the substituent R10 of the present application must have at least 5 carbon atoms if it represents an aliphatic radical.
IL 75612 is directed to compounds which according to formula I therein all carry at least one nitro group as substituent of the phenyl moiety. IL 75612 corresponds to US patent 4,694,009. During the examination of the equivalent US application said US patent has been commented on by the US Examiner himself on page 5 of the Official Action dated June 12, 1995 as follows: "The teaching of the Hubele et al. reference (specifically at column 1 , lines 45-47) generically circumscribes compounds of the instant invention. However, the disclosure Is so broad (i.e. saturated or unsaturated heterocyclic radical containing one or more hetero atoms) and the utility thereof (i.e., herbicides) so disparate from that of the instantly claimed compounds, compositions and methods of use that the reference would fail to suggest to one of ordinary skill in the art to prepare and use the instantly claimed invention" - 5a - IL 75612 discloses no specific compounds coming within the scope of the present application. There is only an overlap of the generic claims if at least one of the substituents R4, R5, R6, R7 and R8 in the present application has ' the meaning "nitro" and if the substituent Q of IL 75612 represents a heterocyclic radical. Although in the body of the specification of IL 75612 some heterocyclic radicals are specified in more detail which come close to the meanings given for the substituent Ri of the present application it should be noted that not a single compound containing a heterocyclic radical appears to have been specifically disclosed in IL 75612. Furthermore, it is felt that a very broad generic disclosure like in IL 75612 does not deprive an application like the present one from Novelty as long as there are no compounds coming within the scope of the present application specifically described in the prior art.
The compounds of formula I have valuable pharmacological properties and can be used, for example, as anti-tumoral drugs and as drugs against atherosclerosis.
The phosphorylation of proteins has long been known as an important step in the differentiation and proliferation of cells. The phosphorylation is catalysed by protein kinases which are divided into serine/threonine kinases and tyrosine kinases. The serine/threonine kinases include protein kinase C and the tyrosine kinases the PDGF (platelet-derived growth factor)-receptor tyrosine kinase.
The compounds of formula I wherein R4 and R8 are hydrogen selectively inhibit the enzyme protein kinase C.
Several species of protein kinase C, which is dependent on phospholipids and calcium, occur within cells (distribution of the species is tissue-specific); protein kinase C participates in various fundamental processes, such as signal transmission, proliferation and differentiation, as well as the release of hormones and neurotransmitters. The enzyme is activated either by means of receptor-mediated hydrolysis of phospholipids of the cell membrane or by direct interaction with certain tumour-promoting agents. Cellular functions that are controlled with the aid of protein kinase C can be influenced by - 6 - modulation of the enzyme activity of protein kinase C.
To determine protein kinase C-inhibiting activity, protein kinase C from pig brain purified in accordance with the procedure described by T. Uchida and C.R. Filburn in J. Biol. Chem. 259, 12311-4 (1984) is used. The protein kinase C-inhibiting activity of the compounds of formula I is determined by the method of D. Fabro et al., Arch. Biochem. Biophys. 239, 102-111 (1985). In that test the compounds of formula I inhibit protein kinase C at a concentration IC50 of as low as approximately from 0.1 to 10 μπιοΐ/litre, especially approximately from 0.05 to 5 μπιο1/1ΐϋ%. On the other hand, the compounds of formula I inhibit other enzymes, for example protein kinase A, phosphorylase protein kinase and certain types of tyrosine protein kinase, for example the tyrosine protein kinase of EGF (epidermal growth factor) receptors, only at a far higher concentration, for example 100 times higher. That is an indication of the selectivity of the compounds of formula I. With a view to reducing undesired side effects, it is important for the protein kinase C-inhibitors to be as selective as possible, i.e. inter alia to have as little effect as possible on other enzymes, especially when the effect of the activity of those other enzymes has no equivalent or synergistic effect on the disease to be treated.
Owing to their inhibiting activity towards protein kinase C, the compounds of formula I wherein R4 and R8 are hydrogen, and their pharmaceutically acceptable salts, can be used as tumour-inhibiting, immunomodulating and anti-bacterial active ingredients and, further, as drugs against atherosclerosis, the immunodeficiency disorder AIDS, and diseases of the cardiovascular system and the central nervous system.
As might already be expected on the basis of the inhibiting action on protein kinase C described above, the compounds of formula I wherein R4 and Rg are hydrogen, and their pharmaceutically acceptable salts, have anti-proliferative properties which can be demonstrated directly in the following, different test In that test the inhibiting action of compounds of formula I on the growth of human T24 bladder carcinoma cells is determined. Those cells are incubated in "Eagle's minimal essential medium", to which 5 % (v/v) foetal calf serum has been added, in a humidified incubator at 37°C and with 5 percent by volume C02 in the air. The carcinoma cells (1000-1500) are transferred to 96- well microtitre plates and incubated overnight under the above-mentioned conditions. The test compound is added in serial dilutions on day 1. The plates are incubated for 5 days under the above-mentioned conditions. During that period the control cultures undergo at least 4 cell divisions. After the incubation, the cells are fixed with 3.3 % (g/v) - 7 - aqueous glutaraldehyde solution, washed with water and stained with 0.05 % (weight/-volume) aqueous methylene blue solution. After washing, the stain is eluted with 3 % (g v) aqueous hydrochloric acid. Then the optical density (OD) per well, which is direcdy proportional to the number of cells, is measured using a photometer (Titertek multiskan) at 665 nm. The IC50 values are calculated by means of a computer system, using the formula OD665 (test) minus OD66S (start) OD665 (control) minus OD665 (start) The IC5o values are defined as that concentration of active ingredient at which the number of cells per well at the end of the incubation period is only 50 % of the number of cells in the control cultures. The IC50 values thus determined are, for the compounds of formula I, approximately from 0.1 to 10 μπιοΐ/litre.
Owing to the properties described, the compounds of formula I wherein R4 and R8 are hydrogen can be used especially as tumour-inhibiting active ingredients, for example for the treatment of tumours of the bladder. In addition, they are suitable for the further applications mentioned above for protein kinase C-modulators and can be used especially in the treatment of diseases that respond to inhibition of protein kinase C.
Some of the compounds of formula I wherein R4 and Rg are hydrogen inhibit not only protein kinase C but, at a concentration IC50 as low as approximately from 0.01 to 5 μΓηο1/Ιΐπ¾, especially approximately from 0.05 to 1 μιηοΐ/litre, also certain tyrosine kinases, such as especially PDGF-receptor kinase or abl-kinase, for example v-abl-kinase. Compounds of formula I wherein at least one of the radicals R4 and R8 is other than hydrogen and is, for example, lower alkyl, such as methyl, are especially selective for the above-mentioned PDGF-receptor and abl-tyrosine kinases and inhibit protein kinase C virtually not at all.
PDGF (platelet-derived growth factor) is a very frequently occurring growth factor which plays an important role both in normal growth and in pathological cell proliferation, such as in carcinogenesis and disorders of the smooth muscle cells of blood vessels, for example in atherosclerosis and thrombosis.
The inhibition of protein kinase C and of PDGF-receptor kinase has in this sense a - 8 - virtually synergistic effect in the same direction with regard to the regulation of cell growth.
The inhibition of PDGF-stimulated receptor tyrosine kinase activity in vitro is measured in PDGF receptor immunocomplexes of BALB/c 3T3 cells, analogously to the method described by E. Andrejauskas-Buchdunger and U. Regenass in Cancer Research 52, 5353-5358 (1992). The compounds of formula I described in detail above inhibit PDGF-dependent cell-free receptor phosphorylation at concentrations of from 0.005 to 5 μπιοΐ/-litre, especially from 0.01 to 1.0, more especially from 0.01 to 0.1 umol/litre. The inhibition of PDGF-receptor tyrosine kinase in the intact cell is detected by means of Western Blot Analysis, likewise analogously to the method described by E. Andrejauskas-Buchdunger and U. Regenass in Cancer Research 52, 5353-5358 (1992). In that test the inhibition of ligand-stimulated PDGF-receptor autophosphorylation in BALB/c mouse cells is measured with the aid of anti-phosphotyrosine antibodies. The compounds of formula I described in detail above inhibit the tyrosine kinase activity of the PDGF receptor at concentrations of from 0.005 to 5 μπ.ο1/1ία¾, especially from 0.01 to 1.0 and more especially from 0.01 to 0.1 μπ-θΐ/ΐίπ-β. At concentrations below 1.0 μπιοΐ/litre, those compounds also inhibit the cell growth of a PDGF-dependent cell line, namely BALB/c 3T3 mouse fibroblasts.
The above-mentioned inhibition of v-abl-tyrosine kinase is determined in accordance with the methods of N. Lydon et al., Oncogene Research 5, 161-173 (1990) and J. F. Geissler et al., Cancer Research 52, 4492-4498 (1992). In those methods [Val5]-angiotensin Π and [γ-32Ρ]-ΑΤΡ are used as substrates.
Owing to the properties described, compounds of formula I can be used not only as tumour-inhibiting active ingredients but also as drugs against non-malignant proliferative diseases, e.g. atherosclerosis, thrombosis, psoriasis, sclerodermitis and fibrosis. They are also suitable for the further applications mentioned above for protein kinase C-modulators and can be used especially in the treatment of diseases that respond to the inhibition of PDGF-receptor kinase.
In addition, the compounds of formula I prevent the development of resistance (multi-drug resistance) in cancer treatment with other chemotherapeutic drugs or remove existing resistance to other chemotherapeutic drugs.
Preference is given to compounds of formula I wherein one or two of the radicals R4, R5, R6, R7 and Rg are each nitro or a radical of formula Π wherein R9 is hydrogen or lower alkyl, X is oxo, thio, imino, N-lower alkyl-imino, hydroximino or O-lower alkyl-hydrox- imino, Y is oxygen or the group NH, n is 0 or 1 and R10 is an aliphatic radical having at least 5 carbon atoms or an aromatic, aromatic- aliphatic, cycloaliphatic, cycloaliphatic-aliphatic, heterocyclic or heterocyclic- aliphatic radical, and the remaining radicals R4, R5, Rg, R7 and Rg are each independently of the others hydrogen, lower alkyl that is unsubstituted or substituted by free or alkylated amino, piperazinyl, piperidinyl, pyrrolidinyl or by morpholinyl, or lower alkanoyl, trifluoro- methyl, free, etherified or esterified hydroxy, free, alkylated or acylated amino or free or esterified carboxy, and the remaining substituents are as defined above, and to salts of such compounds having at least one salt-forming group.
Preference is given especially to compounds of formula I wherein Ri is 4-pyrazinyl, 1-methyl-lH-pyrrolyl, amino- or amino-lower alkyl-substituted phenyl wherein the amino group in each case is free, alkylated by one or two lower alkyl radicals or acylated by lower alkanoyl or by benzoyl, lH-indolyl or lH-imidazolyl bonded at a five-membered ring carbon atom, or unsubstituted or lower alkyl-substituted pyridyl bonded at a ring carbon atom and unsubstituted or substituted at the nitrogen atom by oxygen, R2 and R3 are each independently of the other hydrogen or lower alkyl, one or two of the radicals R4, Rs, R6, R7 and R8 are each nitro, fluoro-substituted lower alkoxy or a radical of formula Π wherein R9 is hydrogen or lower alkyl, X is oxo, thio, imino, N-lower alkyl-imino, hyd ximino or O-lower alkyl-hydrox- imino, Y is oxygen or the group NH, n is 0 or 1 and R10 is an aliphatic hydrocarbon radical having 5-22 carbon atoms, a phenyl or naphthyl radical each of which is unsubstituted or substituted by cyano, lower alkyl, - 10 - hydroxy-lower alkyl, amino-lower alkyl, (4-methyl-piperazinyl)-lower alkyl, trifluoromethyl, hydroxy, lower alkoxy, lower alkanoyloxy, halogen, amino, lower alkylamino, di-lower alkylamino, lower alkanoylarnino, benzoylamino, carboxy or by lower alkoxycarbonyl, or phenyl-lower alkyl wherein the phenyl radical is unsub- stituted or substituted as indicated above, a cycloalkyl or cycloalkenyl radical having up to 30 carbon atoms, cycloalkyl-lower alkyl or cycloalkenyl-lower alkyl each having up to 30 carbon atoms in the cycloalkyl or cycloalkenyl moiety, a monocyclic radical having 5 or 6 ring members and 1-3 ring hetero atoms selected from nitrogen, oxygen and sulfur, to which radical one or two benzene radicals may be fused, or lower alkyl substituted by such a monocyclic radical, and the remaining radicals R4, R5, Rg, R7 and Rg are each independently of the others hydrogen, lower alkyl that is unsubstituted or substituted by amino, lower alkylamino, di-lower alkylamino, piperazinyl, piperidinyl, pyrrolidinyl or by morpho- linyl, or lower alkanoyl, trifluoromethyl, hydroxy, lower alkoxy, lower alkanoyloxy, halogen, amino, lower alkylamino, di-lower alkylamino, lower alkanoylarnino, benzoylamino, carboxy or lower alkoxycarbonyl, and to salts of such compounds having at least one salt-forming group.
Special preference is given to compounds of formula I wherein R] is pyridyl bonded at a ring carbon atom and unsubstituted or substituted at the nitrogen atom by oxygen, R2 and R3 are each hydrogen, R4 is hydrogen or lower alkyl, R5 is hydrogen, lower alkyl or fluoro-substituted lower alkoxy, R6 is hydrogen, R7 is nitro, fluoro-substituted lower alkoxy or a radical of formula Π wherein R9 is hydrogen, X is oxo, n is 0 and R10 is an aliphatic hydrocarbon radical having 5-22 carbon atoms, a phenyl radical that is unsubstituted or substituted by cyano, lower alkyl, (4-methyl-piperazinyl)-lower alkyl, lower alkoxy, halogen or by carboxy; a cycloalkyl radical having up to 30 carbon atoms or a monocyclic radical having 5 or 6 ring members and 1-3 sulfur ring atoms, and R8 is hydrogen, and to pharmaceutically acceptable salts of such compounds having at least one salt- - 11 - forming group.
Special preference is given especially to compounds of formula I wherein Rj is pyridyl or N-oxido-pyridyl each of which is bonded at a carbon atom, R2 and R3 are each hydrogen, R4 is hydrogen or lower alkyl, R5 is hydrogen, lower alkyl or trifluoromethyl, Rg is hydrogen, R7 is nitro, fluoro-substituted lower alkoxy or a radical of formula Π wherein R9 is hydrogen, X is oxo, n is the number 0 and R10 is pyridyl bonded at a carbon atom, phenyl that is unsubstituted or substituted by halogen, cyano, lower alkoxy, carboxy, lower alkyl or by 4-methyl-piperazinyl- methyl, or Cs-C alkyl, thienyl, 2-naphthyl or cyclohexyl, and R8 is hydrogen, and to pharmaceutically acceptable salts of such compounds having at least one salt-forming group.
Preference is given above all to compounds of formula I wherein R4 and Rg are each hydrogen or wherein at least one of the radicals R4 and Rg is lower alkyl, and the other of the radicals R4 and Rg and the remaining radicals are as defined above, and to pharmaceutically acceptable salts of such compounds having at least one salt-forming group.
Preference is given above all especially to compounds of formula I wherein Ki is pyridyl bonded at a carbon atom, R2, R3, R4, R5, Re and Rg are each hydrogen and R7 is nitro or a radical of formula Π wherein R9 is hydrogen, X is oxo, n is the number 0 and R10 is pyridyl bonded at a carbon atom, phenyl that is unsubstituted or substituted by fluorine, chlorine, cyano, lower alkoxy, carboxy, lower alkyl or by 4-methyl-piper- azinyl-methyl, or Cs-C alkyl, thienyl or cyclohexyl, and to pharmaceutically acceptable salts thereof. - 12 - Most especially preferred are the compounds of formula I described in the Examples and pharmaceutically acceptable salts of such compounds having at least one salt-forming group.
In view of their inhibition of protein kinase C, greatest preference is given to those above-mentioned compounds of formula I wherein R4 and R8 are each hydrogen and the remaining substituents are as defined above, and to pharmaceutically acceptable salts of such compounds having at least one salt-forming group.
The compounds of formula I and salts of such compounds having at least one salt-forming group are prepared in accordance with processes known per se. The process according to the invention is as follows: a) a compound of formula ΠΙ wherein Rtl and R^ are each independently of the other lower alkyl and R^, R2 and R3 are as defined above, functional groups present in a compound of formula ΙΠ, with the exception of the groups participating in the reaction, being if necessary in protected form, or a salt of such a compound, is reacted with a compound of formula IV wherein the substituents are as defined above, functional groups present in a compound of - 13 - formula IV, with the exception of the guanidino group participating in the reaction, being if necessary in protected form, or with a salt of such a compound, and any protecting groups present are removed, or b) for the preparation of a compound of formula I wherein the radicals R4, R5, Rg, R7 and R8 are as defined above with the exception of nitro and fluoro-substituted lower alkoxy, a compound of formula V wherein one or two of the radicals R^, R14, R^, Ri6 and R^ are each amino and the remaining radicals R^, R14, R^, R16 and R17 are each independently of the others hydrogen, lower alkyl that is unsubstituted or substituted by free or alkylated amino, piperazinyl, piperidinyl, pyrrolidinyl or by morpholinyl, or lower alkanoyl, trifluoro-methyl, free, etherified or esterified hydroxy, free, alkylated or acylated amino or free or esterified carboxy, and the remaining substituents are as defined above, functional groups present in a compound of formula V, with the exception of the amino group(s) participating in the reaction, being if necessary in protected form, is reacted with a compound of formula VI HO-C(=X)-(Y)n-R10 (VI), wherein the substituents and symbols are as defined above, functional groups present in a compound of formula VI, with the exception of the HO-C(=X) group participating in the reaction, being if necessary in protected form, or with a reactive derivative of a compound of formula VI, and any protecting groups present are removed, or c) for the preparation of a compound of formula I wherein Rt is pyridyl substituted at the nitrogen atom by oxygen, and wherein the other substituents and symbols are as defined - 14 - above, a compound of formula I wherein Rt is pyridyl is converted into the N-oxido compound with a suitable oxidising agent, and, if desired, a compound of formula I obtainable by any one of processes a to c is converted into its salt, or an obtainable salt of a compound of formula I is converted into the free compound.
The procedure for the above-mentioned process variants is explained in detail below: General notes: The end products of formula I may contain substituents that can also be used as protecting groups in starting materials for the preparation of other end products of formula I. Thus, within the scope of this text, only a readily removable group that is not a constituent of the particular desired end product of formula I is designated a "protecting group", unless the context indicates otherwise.
Protecting groups, and the manner in which they are introduced and removed are described, for example, in "Protective Groups in Organic Chemistry", Plenum Press, London, New York 1973, and in "Methoden der organischen Chemie", Houben-Weyl, 4th edition, Vol. 15/1, Georg-Thieme-Verlag, Stuttgart 1974 and in Theodora W. Greene, "Protective Groups in Organic Synthesis", John Wiley & Sons, New York 1981. A characteristic of protecting groups is that they can be removed readily, i.e. without the occurrence of undesired secondary reactions, for example by solvolysis, reduction, photolysis or alternatively under physiological conditions.
Hydroxy-protecting groups are, for example, acyl radicals, such as unsubstituted or substituted, for example halo-substituted, lower alkanoyl, such as 2,2-dichloroacetyl, or acyl radicals of carbonic acid semiesters, especially tert-butoxycarbonyl, unsubstituted or substituted benzyloxycarbonyl, for example 4-nitrobenzyloxycarbonyl, or diphenyl-methoxycarbonyl, or 2-halo-lower alkoxycarbonyl, such as 2,2,2-trichloroethoxycarbonyl, also trityl or formyl, or organic silyl or stannyl radicals, and also readily removable etheri-fying groups, such as tert-lower alkyl, for example tert-butyl, 2-oxa- or 2-thia-aliphatic or 2-oxa- or 2-thia-cycloaliphatic hydrocarbon radicals, especially 1-lower alkoxy-lower alkyl or 1-lower alkylthio-lower alkyl, for example methoxymethyl, 1-methoxy-ethyl, 1- ethoxy-ethyl, methylthiomethyl, 1-methylthioethyl or 1-ethylthioethyl, or 2-oxa- or 2- thiacycloalkyl having 5 or 6 ring atoms, for example tetrahydrofuryl or 2-tetrahydro-pyranyl or corresponding thia analogues, and unsubstituted or substituted 1-pheny 1-lower - 15 - alkyl, such as unsubstituted or substituted benzyl or diphenylmethyl, suitable substituents of the phenyl radicals being, for example, halogen, such as chlorine, lower alkoxy, such as methoxy, and/or nitro.
A protected amino group may be, for example, in the form of a readily cleavable acyl-amino, arylmethylamino, etherified mercaptoamino, 2-acyl-lower alk-l-en-yl-amino, silyl-amino or stannylamino group or in the form of an azido group.
In a corresponding acylamino group, acyl is, for example, the acyl radical of an organic carboxylic acid having, for example, up to 18 carbon atoms, especially an alkanecarb-oxylic acid that is unsubstituted or substituted, for example, by halogen or by aryl, or of a benzoic acid that is unsubstituted or substituted, for example, by halogen, lower alkoxy or by nitro, or of a carbonic acid semiester. Such acyl groups are, for example, lower alkanoyl, such as formyl, acetyl or propionyl, halo-lower alkanoyl, such as 2-haloacetyl, especially 2-chloro-, 2-bromo-, 2-iodo-, 2,2,2-trifluoro- or 2,2,2-trichloro-acetyl, benzoyl that is unsubstituted or substituted, for example, by halogen, lower alkoxy or by nitro, for example benzoyl, 4-chlorobenzoyl, 4-methoxybenzoyl or 4-nitrobenzoyl, or lower alkoxy-carbonyl that is branched in the 1 -position of the lower alkyl radical or suitably substituted in the 1- or 2-position, especially tert-lower alkoxycarbonyl, for example tert-butoxy-carbonyl, arylmethoxycarbonyl having one or two aryl radicals which are preferably phenyl that is unsubstituted or mono- or poly-substituted, for example, by lower alkyl, especially tert-lower alkyl, such as tert-butyl, lower alkoxy, such as methoxy, hydroxy, halogen, for example chlorine, and/or by nitro, such as unsubstituted or substituted benzyl-oxycarbonyl, for example 4-nitro-benzyloxycarbonyl, or substituted diphenylmethoxy-carbonyl, for example benzhydryloxycarbonyl or di(4-methoxyphenyl)methoxycarbonyl, aroylmethoxycarbonyl wherein the aroyl group is preferably benzoyl that is unsubstituted or substituted, for example, by halogen, such as bromine, for example phenacyloxy-carbonyl, 2-halo-lower alkoxycarbonyl, for example 2,2,2-trichloroethoxycarbonyl, 2-bromoethoxycarbonyl or 2-iodoethoxycarbonyl, or 2-(trisubstituted silyl)-ethoxy-carbonyl wherein each of the substituents, independently of the others, is an aliphatic, araliphatic, cycloaliphatic or aromatic hydrocarbon radical having up to IS carbon atoms that is unsubstituted or substituted, for example, by lower alkyl, lower alkoxy, aryl, halogen or by nitro, such as corresponding unsubstituted or substituted lower alkyl, phenyl-lower alkyl, cycloalkyl or phenyl, for example 2-tri-lower alkylsilylethoxy-carbonyl, such as 2-trimethylsilylethoxycarbonyl or 2-(di-n-butyl-methyl-silyl)-ethoxy-carbonyl, or 2-triarylsilylethoxycarbonyl, such as 2-triphenylsilylethoxycarbonyl. 16 Other acyl radicals that are suitable as amino-protecting groups are corresponding radicals of organic phosphoric, phosphonic or phosphinic acids, such as di-lower alkylphosphoryl, for example dimethylphosphoryl, diethylphosphoryl, di-n-propylphosphoryl or diiso-propylphosphoryl, dicycloalkylphosphoryl, for example dicyclohexylphosphoryl, unsubstituted or substituted diphenylphosphoryl, for example diphenylphosphoryl, unsubstituted or substituted, for example nitro-substituted, di(phenyl-lower alkylphosphoryl, for example dibenzylphosphoryl or di(4-nitrobenzyl)phosphoryl, unsubstituted or substituted phenoxy-phenyl-phosphonyl, for example phenoxyphenyl-phosphonyl, di-lower alkylphosphinyl, for example diethylphosphinyl, or unsubstituted or substituted diphenylphosphinyl, for example diphenylphosphinyl.
In an arylmethylamino group that is a mono-, di- or, especially, tri-arylmethylamino group, the aryl radicals are especially unsubstituted or substituted phenyl radicals. Such groups are, for example, benzyl-, diphenylmethyl- and especially trityl-amino.
An etherified mercapto group in an amino group protected by such a radical is especially arylthio or aryl-lower alkylthio, wherein aryl is especially phenyl that is unsubstituted or substituted, for example, by lower alkyl, such as methyl or tert-butyl, lower alkoxy, such as methoxy, halogen, such as chlorine, and/or by nitro. A corresponding amino-protecting group is, for example, 4-nitrophenylthio.
In a 2-acyl-lower alk-l-en-l-yl radical that can be used as amino-protecting group, acyl is, for example, the corresponding radical of a lower alkanecarboxylic acid, of a benzoic acid that is unsubstituted or substituted, for example, by lower alkyl, such as methyl or tert-butyl, lower alkoxy, such as methoxy, halogen, such as chlorine, and/or by nitro, or especially of a carbonic acid semiester, such as a carbonic acid lower alkyl semiester. Corresponding protecting groups are especially 1-lower alkanoyl-prop-l-en-2-yl, for example l-acetyl-prop-l-en-2-yl, or 1-lower alkoxycarbonyl-prop-l-en-2-yl, for example 1 -ethoxycarbonyl-prop- 1 -en-2-yl.
Preferred amino-protecting groups are acyl radicals of carbonic acid semiesters, especially tert-butoxycarbonyl, benzyloxycarbonyl that is unsubstituted or substituted, for example, as indicated, for example 4-nitro-benzyloxycarbonyl, or diphenylmethoxycarbonyl, or 2-halo-lower alkoxycarbonyl, such as 2,2,2-trichloroethoxycarbonyl, also trityl or formyl. The removal of the protecting groups that are not constituents of the desired end product - 17 - of formula I is effected in a manner known per se, for example by means of solvolysis, especially hydrolysis, alcoholysis or acidolysis, or by means of reduction, especially hydrogenolysis or chemical reduction, as desired stepwise or simultaneously.
A protected amino group is freed in a manner known per se and, according to the nature of the protecting groups, in various ways, preferably by means of solvolysis or reduction. 2-Halo-lower alkoxycarbonylamino (optionally after conversion of a 2-bromo-lower alkoxycarbonylamino group into a 2-iodo-lower alkoxycarbonylamino group), aroyl-methoxycarbonylamino or 4-nitrobenzyloxycarbonylamino can be cleaved, for example, by treatment with a suitable chemical reducing agent, such as zinc in the presence of a suitable carboxylic acid, such as aqueous acetic acid. Aroylmemoxycarbonylamino can be cleaved also by treatment with a nucleophilic, preferably salt-forming, reagent, such as sodium thiophenolate, and 4-nitro-benzyloxycarbonylamino can be cleaved also by treatment with an alkali metal dithionite, for example sodium dithionite. Unsubstituted or substituted diphenylmethoxycarbonylamino, tert-lower alkoxycarbonylamino or 2-tri-substituted silylethoxycarbonylamino can be cleaved by treatment with a suitable acid, for example formic or trifluoroacetic acid; unsubstituted or substituted benzyloxycarbonyl-amino can be cleaved, for example, by means of hydrogenolysis, that is to say by treatment with hydrogen in the presence of a suitable hydrogenation catalyst, such as a palladium catalyst; unsubstituted or substituted triarylmemylamino or formylamino can be cleaved, for example, by treatment with an acid, such as a mineral acid, for example hydrochloric acid, or an organic acid, for example formic, acetic or trifluoroacetic acid, optionally in the presence of water, and an amino group protected by an organic silyl group can be freed, for example, by means of hydrolysis or alcoholysis. An amino group protected by 2-haloacetyl, for example 2-chloroacetyl, can be freed by treatment with thiourea in the presence of a base, or with a thiolate salt, such as an alkali metal thiolate, of thiourea and subsequent solvolysis, such as alcoholysis or hydrolysis, of the resulting condensation product An amino group protected by 2-substituted silylethoxycaibonyl can also be converted into the free amino group by treatment with a salt of hydrofluoric acid yielding fluoride anions.
A hydroxy group protected by a suitable acyl group, an organic silyl group or by unsubstituted or substituted 1 -phenyl- lower alkyl is freed analogously to a correspondingly protected amino group. Hydroxy protected by unsubstituted or substituted 1-phenyl-lower alkyl, for example benzyl, is preferably freed by catalytic hydrogenation, for example in the presence of a palladium-on-carbon catalyst. A hydroxy group protected by - 18 - 2,2-dichloroacetyl is freed, for example, by basic hydrolysis, and a hydroxy group etherified by tert-lower alkyl or by a 2-oxa- or 2-thia-aliphatic or 2-oxa- or 2-thia-cyclo-aliphatic hydrocarbon radical is freed by acidolysis, for example by treatment with a mineral acid or a strong carboxylic acid, for example trifluoroacetic acid. Hydroxy etherified by an organic silyl radical, for example trimethylsilyl, can also be freed by a salt of hydrofluoric acid yielding fluoride anions, for example tetrabutylammonium fluoride.
Process a: Preferably Rn and R12 are each methyl.
Free functional groups in a compound of formula ΙΠ that are advantageously protected by readily removable protecting groups are especially amino groups in the radical Rj and the imino group of lH-indolyl. The latter can be protected, for example, by benzyl.
Free functional groups in a compound of formula IV that are advantageously protected by readily removable protecting groups are especially amino groups, but also hydroxy and carboxy groups.
A salt of a compound of formula IV is preferably an acid addition salt, for example a nitrate or one of the acid addition salts mentioned for the end products of formula I.
The reaction is carried out in a suitable solvent or dispersing agent, for example a suitable alcohol, such as 2-methoxy-ethanol, or a suitable lower alkanol, for example isopropanol, at a temperature of from room temperature (approx. 20°C) to 150°C, for example under reflux. Especially when the compound of formula IV is used in the form of a salt, that salt is converted into the free compound, preferably in situ, by the addition of a suitable base, such as an alkali metal hydroxide, for example sodium hydroxide.
It is preferable to use as starting materials compounds of formula IV wherein one or two of the radicals R4, R5, Rg, R7 and Rg are each nitro and the remaining radicals R4, R5, Rg, R7 and Rg are each independently of the others hydrogen, lower alkyl that is unsubstituted or substituted by free or alkylated amino, piperazinyl, piperidinyl, pyrrolidinyl or by morpholinyl, or lower alkanoyl, trifluoromethyl, free, etherified or esterified hydroxy, free, alkylated or acylated amino or free or esterified carboxy.
The starting material of formula III is obtained by reacting a compound of formula VII - 19 - wherein the substituents are as defined above, with a compound of formula Vm wherein R18 and R19 are each lower alkyl and the remaining substituents are as defined above, in a manner analogous to that described in the European Patent Application having the Publication No. 233461. Typical representatives of a compound of formula VDI are N,N-dimemylformamide-dimethylacetal and N,N-dimethylacetamide-dimethylacetal. The reaction is carried out with heating of the reactants of formulae VII and Vm for several hours, for example for from 4 to 24 hours, at a temperature of approximately from 50°C to 150°C, in the absence or, if necessary, in the presence of a solvent.
The starting material of formula ΙΠ is alternatively obtained by reacting a compound of formula VII with an ester of the formula R3-C(=0)-0-CH2-CH3 wherein R3 is as defined above, and reacting the resulting product with an amine of the formula H-N(Rn)-R12 wherein the substituents are as defined above.
The starting material of formula IV is obtained in the form of an acid addition salt by reacting a compound of formula IX wherein the substituents are as defined above, with cyanamide (NC-NH^- The reaction is - 20 - carried out in a suitable solvent or dispersing agent, for example a suitable alcohol, for example a suitable lower alkanol, such as ethanol, in the presence of equimolar amounts of the salt-forming acid at a temperature of from room temperature to 150°C, for example under reflux.
Process b: Free functional groups in a compound of formula V or VI that are advantageously protected by readily removable protecting groups are especially amino groups, but also hydroxy and carboxy groups, that are not intended to participate in the desired reaction, for example amino in the radical Rj.
A reactive derivative of a compound of formula VI wherein X is oxo is especially a reactive (activated) ester, a reactive anhydride or a reactive cyclic amide. The same is true for the derivatives wherein X has one of the other definitions given above.
Reactive (activated) esters of an acid of formula VI are especially esters unsaturated at the linking carbon atom of the esterifying radical, for example esters of the vinyl ester type, such as actual vinyl esters (obtainable, for example, by transesterification of a corresponding ester with vinyl acetate; activated vinyl ester method), carbamoylvinyl esters (obtainable, for example, by treatment of the corresponding acid with an isoxazolium reagent; 1,2-oxazolium or Woodward method), or 1-lower alkoxyvinyl esters (obtainable, for example, by treatment of the corresponding acid with a lower alkoxyacetylene; ethoxy-acetylene method), or esters of the amidino type, such as Ν,Ν'-disubstituted amidino esters (obtainable, for example, by treatment of the corresponding acid with a suitable N.N'-disubstituted carbcdiimide, for example N,N'-dicyclohexylcarbc Uimide; carbodi-imide method), or N,N-disubstituted amidino esters (obtainable, for example, by treatment of the corresponding acid with an N,N-disubstituted cyanamide; cyanamide method), suitable aryl esters, especially phenyl esters suitably substituted by electron-attracting substituents (obtainable, for example, by treatment of the corresponding acid with a suitably substituted phenol, for example 4-nitrophenol, 4-methylsulfonyl-phenol, 2,4,5-tri-chlorophenol, 2,3,4,5,6-pentachloro-phenol or 4-phenyldiazophenol, in the presence of a condensation agent, such as Ν,Ν'-dicyclohexylcarbodiimide; activated aryl esters method), cyanomethyl esters (obtainable, for example, by treatment of the corresponding acid with chloroacetonitrile in the presence of a base; cyanomethyl esters method), thio esters, especially unsubstituted or substituted, for example nitro-substituted, phenylthio esters (obtainable, for example, by treatment of the corresponding acid with unsubstituted - 21 - or substituted, for example nitro-substituted, thiophenols, inter alia by the anhydride or carbodiimide method; activated thiol esters method), amino or amido esters (obtainable, for example, by treatment of the corresponding acid with an N-hydroxy-amino or N-hydroxy-amido compound, for example N-hydroxy-succiriimide, N-hydroxy-piperidine, N-hydroxy-phthalimide or 1-hydroxy-benzotriazole, for example by the anhydride or carbodiimide method; activated N-hydroxy esters method), or silyl esters (which are obtainable, for example, by treatment of the corresponding acid with a silylating agent, for example hexamethyl disilazane, and react readily with hydroxy groups but not with amino groups).
Anhydrides of an acid of formula VI may be symmetric or preferably mixed anhydrides of that acid, for example anhydrides with inorganic acids, such as acid halides, especially acid chlorides (obtainable, for example, by treatment of the corresponding acid with thionyl chloride, phosphorus pentachloride or oxalyl chloride; acid chloride method), azides (obtainable, for example, from a corresponding acid ester via the corresponding hydrazide and treatment thereof with nitrous acid; azide method), anhydrides with carbonic acid semiderivatives, such as corresponding esters, for example carbonic acid lower alkyl semiesters (obtainable, for example, by treatment of the corresponding acid with haloformic, such as chloroformic, acid lower alkyl esters or with a 1-lower alkoxy-carbonyl-2-lower alkoxy-l,2-dihydroquinoline, for example 1-lower alkoxycarbonyl-2-emoxy-l,2-dihydroquinoline; mixed O-alkylcarbonic acid anhydrides method), or anhydrides with dihalogenated, especially dichlorinated, phosphoric acid (obtainable, for example, by treatment of the corresponding acid with phosphorus oxychlonde; phosphorus oxychlonde method), or anhydrides with organic acids, such as mixed anhydrides with organic carboxylic acids (obtainable, for example, by treatment of the corresponding acid with an unsubstituted or substituted lower alkane- or phenylalkane-carboxylic acid halide, for example phenylacetic acid chloride, pivalic acid chloride or trifluoroacetic acid chloride; mixed carboxylic acid anhydrides method) or with organic sulfonic acids (obtainable, for example, by treatment of a salt, such as an alkali metal salt, of the corresponding acid, with a suitable organic sulfonic acid halide, such as lower alkane- or aryl-, for example methane- or p-toluene-sulfonic acid chloride; mixed sulfonic acid anhydrides method), and symmetric anhydrides (obtainable, for example, by condensation of the corresponding acid in the presence of a carbodiimide or of 1-diethylaminopropyne; symmetric anhydrides method).
Suitable cyclic amides are especially amides with five-membered diazacycles of aromatic - 22 - character, such as amides with imidazoles, for example imidazole (obtainable, for example, by treatment of the corresponding acid with N,N'-carbonyldiimidazole imidazolide method), or pyrazoles, for example 3,5-dimethyl-pyrazole (obtainable, for example, by way of the acid hydrazide by treatment with acetylacetone; pyrazolide method).
Derivatives of acids of formula VI that can be used as acylating agents can also be formed in situ. For example, N,N'-disubstituted amidino esters can be formed in situ by reacting a mixture of the starting material of formula V and the acid used as acylating agent in the presence of a suitable N,N-disubstituted carbc liimide, for example N Ji'-dicyclohexyl-carbodiimide. In addition, amino or amido esters of the acids used as acylating agents can be formed in the presence of the starting material of formula V to be acylated, by reacting a mixture of the corresponding acid and amino starting materials in the presence of an Ν,Ν'-disubstituted carbodiimide, for example N.N'-dicyclohexyl-carbodiimide, and an N-hydroxy-amine or N-hydroxy-amide, for example N-hydiOxysuccininude, where appropriate in the presence of a suitable base, for example 4-a memylamino-pyridine.
The reaction is preferably carried out by reacting a reactive carboxylic acid derivative of a compound of formula VI with a compound of formula V wherein the amino group or hydroxy group participating in the reaction is in free form.
The reaction can be carried out in a manner known per se, the reaction conditions being dependent especially on whether, and if so how, the carboxy group of the acylating agent has been activated, usually in the presence of a suitable solvent or diluent or of a mixture thereof and, if necessary, in the presence of a condensation agent, which, for example when the carboxy group participating in the reaction is in the form of an anhydride, may also be an acid-binding agent, with cooling or heating, for example in a temperature range from approximately -30°C to approximately +150°C, especially approximately from 0°C to +100°C, preferably from room temperature (approx. +20°C) to +70°C, in an open or closed reaction vessel and/or in the atmosphere of an inert gas, for example nitrogen. Customary condensation agents are, for example, carbodiimides, for example Ν,Ν'-diethyl-, Ν,Ν'-dipropyl-, N ,Ν'-dicyclohexyl- or N-ethyl-N'-(3-dimemylamino-propyl)-carbodiimide, suitable carbonyl compounds, for example carbonyldiirnidazole, or 1,2-oxazolium compounds, for example 2-ethyl-S-phenyl-l,2-oxazolium 3 '-sulfonate and 2-tert-butyl-5-methyl-isoxazolium perchlorate, or a suitable acylamino compound, for example 2-ethoxy-l-ethoxycarbonyl-l,2-dihydroquinoline. Customary acid-binding - 23 - condensation agents are, for example, alkali metal carbonates or hydrogen carbonates, for example sodium or potassium carbonate or hydrogen carbonate (customarily together with a sulfate), or organic bases, such as, customarily, pyridine or sterically hindered tri-lower alkylamines, for example N,N-m^sopropyl-N-emyl-amine.
The starting material of formula V is obtained by reduction of the nitro group(s) in a compound of formula I wherein one or two of the radicals R4, 5, Rg, R7 and R8 are each nitro. That reduction can be carried out, for example, by catalytic hydrogenation in a suitable solvent, such as a suitable acyclic or cyclic ether, such as in tetrahydrofuran. There is preferably used as hydrogenation catalyst palladium on active carbon (5 %) and in that case the hydrogenation is preferably carried out under normal pressure.
Process c: A suitable oxidising agent for converting a compound of formula I wherein Rj is pyridyl into the N-oxido compound is preferably a suitable peracid, for example a suitable perbenzoic acid, such as especially m-chloro-perbenzoic acid. The reaction is carried out in an inert solvent, for example a halogenated hydrocarbon, such as preferably methylene chloride, at temperatures of approximately from -20°C to +150°C, especially approximately from 0°C to the boiling point of the solvent in question, in general below +100°C, and preferably at room temperature or at slightly elevated temperature (20°C-70°C).
Acid addition salts of compounds of formula I are obtained in customary manner, for example by treatment with an acid or a suitable anion exchange reagent Acid addition salts can be converted into the free compounds in customary manner, for example by treatment with a suitable basic agent.
Mixtures of isomers can be separated into the individual isomers in a manner known per se, for example by fractional crystallisation, chromatography, etc..
The processes described above, including the processes for removing protecting groups and the additional process steps, are, unless otherwise indicated, carried out in a manner known per se, for example in the presence or absence of preferably inert solvents and diluents, if necessary in the presence of condensation agents or catalysts, at reduced or elevated temperature, for example in a temperature range of from approximately -20°C to approximately 150°C, especially from approximately 0°C to approximately +70°C, 105264/2 - 24 - 1 preferably from approximately +10°C to approximately +50°C, and more especially at room temperature, in a suitable vessel and if necessary in an inert gas atmosphere, for example a nitrogen atmosphere.
In those process steps, taking account of all the substituents in the molecule, if necessary, for example when readily hydrolysable radicals are present, especially mild reaction conditions should be used, such as short reaction times, the use of mild acidic or basic agents at low concentrations, stoichiometric quantity ratios, and the selection of suitable catalysts, solvents, temperature and/or pressure conditions.
The invention relates also to those forms of the process in which a compound obtainable as intermediate at any stage of the process is used as starting material and the remaining steps are carried out or the process is interrupted at any stage or a starting material is formed under the reaction conditions or is used in the form of a reactive derivative or salt. It is preferable to begin with those starting materials which in accordance with the process result in the compounds described above as being especially valuable.
The present invention relates also to novel starting materials and/or intermediates and to processes for the preparation thereof. The starting materials used and the reaction conditions chosen are preferably those which result in the compounds described in this Application as being especially preferred.
The compounds of the formula I and pharmaceutically acceptable salts of such compounds having at least one salt-forming group can be used in a method of treating warm-blooded animals suffering from a tumoral disease, which comprises administering to warmblooded animals requiring such treatment an effective, tumour-inhibiting amount of a compound of formula I or of a pharmaceutically acceptable salt thereof. They can be also used for preparing pharmaceutical compositions for use in the therapeutic treatment of the human or animal body. Compounds of formula I or pharmaceutically acceptable salts thereof can be used for inhibiting PDGF-receptor kinase and compounds of formula I wherein R4 and R8 are each hydrogen, or pharmaceutically acceptable salts thereof, can be used for inhibiting protein kinase C in warm-blooded animals. Effective doses, for example daily doses of approximately from 1 to 1000 mg, especially from 50 to 500 mg, are administered to a warm-blooded animal of approximately 70 kg body weight according to species, age, individual condition, mode of administration and the individual syndrome. 25 The invention relates also to pharmaceutical compositions comprising an effective amount, especially an amount effective in the prevention or therapy of one of the above-mentioned diseases, of the active ingredient together with pharmaceutically acceptable carriers that are suitable for topical, enteral, for example oral or rectal, or parenteral administration, and may be inorganic or organic, solid or liquid. For oral administration there are used especially tablets or gelatin capsules comprising the active ingredient together with diluents, for example lactose, dextrose, sucrose, mannitol, sorbitol, cellulose and/or glycerol, and/or lubricants, for example silicic acid, talc, stearic acid or salts thereof, such as magnesium or calcium stearate, and/or polyethylene glycol. Tablets may also comprise binders, for example magnesium aluminium silicate, starches, such as corn, wheat or rice starch, gelatin, methylcellulose, sodium carboxymethylcellulose and/or polyvinylpyrrolidone, and, if desired, disintegrators, for example starches, agar, alginic acid or a salt thereof, such as sodium alginate, and/or effervescent mixtures, or adsorbents, dyes, flavourings and sweeteners. The pharmacologically active compounds of the present invention can also be used in the form of parenterally administrable compositions or in the form of infusion solutions. Such solutions are preferably isotonic aqueous solutions or suspensions, which, for example in the case of lyophilised compositions that comprise the active ingredient alone or together with a carrier, for example mannitol, can be prepared before use. The pharmaceutical compositions may be sterilised and/or may comprise excipients, for example preservatives, stabilisers, wetting agents and/or emulsifiers, solubilisers, salts for regulating the osmotic pressure and/or buffers. The present pharmaceutical compositions which, if desired, may comprise further pharmacologically active substances, such as antibiotics, are prepared in a manner known per se. for example by means of conventional mixing, granulating, confectioning, dissolving or lyophilising processes, and comprise approximately from 1 % to 100 %, especially from approximately 1 % to approximately 20 %, active ingredient(s).
The following Examples illustrate the invention but do not limit the invention in any way. The R values are determined on silica gel thin-layer plates (Merck, Darmstadt, Germany). The ratio to one another of the eluants in the eluant mixtures used is given in proportions by volume (v/v), and temperatures are given in degrees Celsius.
Abbreviations: HV: high vacuum n: normal (straight-chain) Example 1: 41.3 g (0.17 mol) of 3-nitrophenyl-guanidine nitrate, made into a slurry in - 26 - 50 ml of isopropanol, are added to a solution of 30 g (0.17 mol) of 3-o^imethylamino-l-(3-pyridyl)-2-propen-l-one [described in EP-A-0 233461] in 250 ml of isopropanol. After the addition of 7.49 g (0.19 mol) of sodium hydroxide, the yellow suspension is boiled at reflux for 8 hours. After cooling to 0°, the mixture is filtered and washed with 200 ml of isopropanol. The filtration residue is made into a slurry in 300 ml of water and stirred for 30 minutes, filtered and washed with 200 ml of water. After again making into a slurry in 200 ml of ethanol and washing with 200 ml of ethanol/diethyl ether (1:1) there is obtained N-(3-mtrophenyl)-4-(3-pyridyl)-2-pyrimi(u^e-amine; m.p. 212-213°, Rf = 0.75 (chloro-fornrmethanol = 9:1).
The starting material is obtained as follows: Step 1.1: 42 ml (0.6 mol) of nitric acid (65 ) are added dropwise to a yellow suspension of 82.88 g (0.6 mol) of 3-nitroaniline in 200 ml of ethanol. After the exothermic reaction has subsided, 75.7 g (0.9 mol) of cyanamide (50 % in water) are added and the reaction mixture is boiled at reflux for 21 hours. After cooling to 0°, the mixture is filtered and washed six times with ethanol/diethyl ether (1:1). Drying under HV at 40° yields 3-nitro-phenyl-guanidine nitrate; m.p. 205-207°.
Step 1.2: 8 g (0.35 mol) of sodium are placed in 260 ml of toluene and at 100° made into a suspension using a vibromixer. After cooling to 0°, 17 ml (0.42 mol) of methanol are added dropwise, with cooling, and the mixture is then stirred for 45 minutes at 75°. At 25° and with ice-cooling, a solution of 38.5 ml (0.35 mol) of 3-acetylpyridine and 28 ml (0.35 mol) of ethyl formate in 300 ml of toluene are added dropwise in the course of 45 minutes. The yellow suspension is stirred for 16 hours at 25° and then 23.7 g (0.52 mol) of dimethylamine are added. After the addition of 100 ml of toluene, the mixture is stirred for 45 minutes at 25°, and then at 0° a solution of 20 ml of acetic acid in 150 ml of toluene is added dropwise in the course of 30 minutes and the mixture is then boiled at reflux for 1 hour. After cooling to 25°, the mixture is filtered and washed with 500 ml of toluene/-hexane (1:1) and the filtrate is concentrated until crystallisation begins. Cooling to 0°, filtration and drying at 80° under HV yield 3-dimethylamino-l-(3-pyridyl)-2-propen-l-one; m.p. 81-82°.
Example 2: 100 mg (0.38 mmol) of N-(3-aminophenyl)-4-(3-pyridyl)-2-pyrimidme-anune are dissolved in 5 ml of pyridine; 58.5 μΐ (0.46 mmol) of 4-chlorobenzoyl chloride are added and the mixture is stirred at room temperature for 24 hours. 10 ml of water are - 27 - added to the reaction mixture which is then cooled to 0° and filtered. Washing with water and drying yield N-[3-(4-chlorobenzoylamido)-phenyl]-4-(3-pyridyl)-2-pyrimidine-anim m.p. 238-240°, Rf = 0.66 (chloroform:methanol = 9:1).
The starting material is obtained as follows: Step 2.1: A suspension of 17.0 g (0.058 mol) of N-(3-nitrophenyl)-4-(3-pyridyl)-2-pyrimidine-amine in 1700 ml of tetrahydrofuran is stirred with 1.7 g of palladium on active carbon (5 %) under a hydrogen atmosphere at normal pressure for 21 hours. The suspension is filtered and the filtrate is concentrated in a rotary evaporator. The yellow solid product that remains behind is stirred overnight in 200 ml of methylene chloride. Filtration and drying yield N-(3-ammophenyl)-4-(3-pyridyl)-2-pyrinii(ime-amine; mTp. 89-90°, Rf = 0.38 (chloroform:methanol = 9:1).
Example 3: 53 μΐ (0.46 mmol) of benzoyl chloride are added to a solution of 100 mg (0.38 mmol) of N-(3-ammophenyl)-4-(3rpyridyl)-2-pyrimidine-amine in 5 ml of pyridine and the mixture is stirred under a nitrogen atmosphere for 24 hours at room temperature. 10 ml of water are added to the reaction mixture which is then cooled to 0°, filtered and washed with water. Drying under HV yields N-(3-benzoylamidophenyl)-4-(3-pyridyl)-2-pyrimidine-amine; m.p. 207-209°, Rf = 0.53 (chloroform:methanol = 9:1).
Example 4: A solution of 100 mg (0.38 mmol) of N-(3-aminophenyl)-4-(3-pyridyl)-2-pyrimidine-amine and 59 mg (0.46 mmol) of 2-pyridinecarboxylic acid chloride in 5 ml of pyridine is stirred under nitrogen for 24 hours at room temperature. After the addition of 30 mg (0.23 mmol) of 2-pyridine-carboxylic acid chloride, the mixture is stirred for 18 hours and then a further 25 mg (0.19 mmol) of 2-pyridinecarboxylic acid chloride are added and the mixture is stirred for 72 hours at 25°. After the addition of 10 ml of water and cooling to 0°, the mixture is filtered and washed with water. Separation by chromatography (silica gel, CHC-3/MeOH = 9:1) yields N-[3-(2-pyridyl)-carboxamido-phenyl]-4-(3-pyridyl)-2-pyrimidme-amine; m.p. 187-190°, Rf = 0.58 (chloroform:methanol = 9:1).
Example 5: Analogously to Example 4, N-[3-(3-pyridyl)-carboxamido-phenyl]-4-(3-pyridyl)-2-pyriniidine-amine is prepared from 3-pyridinecarboxylic acid chloride; m.p. 217-220°, Rf = 0.29 (chloroform:methanol = 9:1).
Example 6: Analogously to Example 4, N-[3-(4-pyridyl)-carboxamido-phenyl]-4-(3- - 28 - pyridyl)-2-pyrirnidine-amine is synthesised from 4-pyri(iinecarboxylic acid chloride; m.p. 224-226°, Rf = 0.29 (chloroform:methanol = 9:1).
Example 7: 63 ul (0.46 mmol) of pentafluorobenzoyl chloride are added to a solution of 100 mg (0.38 mmol) of N-(3-aminophenyl)-4-(3-pyridyl)-2-pyrimidine-amine in 5 ml of pyridine and the mixture is stirred under nitrogen at room temperature for 17 hours. 10 ml of water are added to the brown reaction solution which is then cooled to 0° and filtered. The residue is recrystallised from ethanol/acetone and yields the crystalline product N-(3-pentafluoroben2»ylamido-phenyl)-4-(3-pyridyl)-2-pyriini(^ m.p. 234-244°, Rf = 0.41 (chloroform:methanol 9:l).
Example 8: 28 mg (0.19 mmol) of phthalic acid anhydride are added to a solution of 50 mg (0.19 mmol) of N-(3-aminophenyl)-4-(3-pyridyl)-2-pyrimidme-amine in 1 ml of pyridine. After 2.5 hours, a further 14 mg (0.095 mmol) of phthalic acid anhydride are added to the yellow reaction solution and the mixture is stirred for 20 hours at 25°. The suspension is filtered and washed with a small amount of cold pyridine. The residue is digested with 2 x 2.5 ml of absolute ethanol and yields N-[3-(2-carboxybenzoylamido)-phenyl]-4-(3-pyridyl)-2-pyrm idine-amine; m.p. 206-209°, Rf = 0.07 (chloroform:-methanol = 9:1).
Example 9: A solution of 100 mg (0.38 mmol) of N-(3-aminophenyl)-4-(3-pyridinyl)-2-pyrimidine-amine and 105 ul (0.46 mmol) of caproic acid anhydride in 5 ml of pyridine is stirred under a nitrogen atmosphere for 24 hours at 25° and then concentrated in a rotary evaporator. The residue is purified by flash chromatography (silica gel, chloroform:-methanol 95:5), yielding N-(3-n-hexanoylanudo-phenyl)-4-(3-pyridyl)-2-pyrimidine-amine; m.p. 180-184°, Rf = 0.78 (chloroform:methanol = 9:1).
Example 10: 1 g (5.68 mmol) of 3-(hmemylamino-l-(2-pyridyl)-2-propen-l-one [EP-A-233 461] is dissolved in 8 ml of isopropanol, and 1.38 g (5.68 mmol) of 3-nitrophenyl-guanidine nitrate are added. After the addition of 0.25 g (6.24 mmol) of sodium hydroxide, the yellow suspension is heated at reflux for 20 hours, then cooled to 0°, filtered and washed with 30 ml of isopropanol. The filtration residue is stirred in 15 ml of ethanol for 20 minutes, filtered and washed with a small amount of cold ethanol, yielding N-(3-nitrophenyl)-4-(2-pyridyl)-2-pyrinndine-amine; m.p. 213-219°.
Example 11: 1.38 g (5.68 mmol) of 3-nitrophenyl-guanidine nitrate and 0.25 g - 29 - (6.24 mmol) of sodium hydroxide are added to a solution of 1 g (5.68 mmol) of 3-dimethylarnino-l-(4-pyridyl)-2-propen-l-one [US Patent 4 281 000] in 8 ml of iso-propanol. The yellow suspension is heated at reflux for 20 hours and then cooled to 0°. After washing with 30 ml of isopropanol the filtration residue is made into a slurry in succession in 15 ml of ethanol and then in 15 ml of water and filtered each time. Drying under HV yields N-(3-nitrophenyl)-4-(4-pyridyl)-2-pyrinu(iine-anu^ m.p. 282-284°.
Example 12: Analogously to Example 2, N-[3-(2-methoxybenzoylamido)-phenyl]-4-(3-pyridyl)-2-pyrirm i e-amine is prepared from 2-methoxybenzoyl chloride; m.p. 115-117°, Rf = 0.76 (chloroformrmethanol = 9: 1).
Example 13: Analogously to Example 2, N-[3-(4-fluorobenzoylamido)-phenyl]-4-(3-pyridyl)-2-pyrimi(Une-amine is prepared from 4-fluorobenzoyl chloride; m.p. 215-216°, Rf = 0.34 (chloroform:methanol = 9: 1).
Example 14: Analogously to Example 2, N-[3-(4-cyanobenzoylamido)-phenyl]-4-(3-pyridyl)-2-pyrimichne-amine is prepared from 4-cyanobenzoyl chloride; m.p. 220-222°, Rf = 0.31 (chloroform.-methanol = 9:1).
Example 15: Analogously to Example 2, N-[3-(2-thienylcarboxamido)-phenyl]-4-(3-pyridyl)-2-pyrimidine-amine is prepared from 2-thiophenecarboxylic acid chloride; m.p. 139-141°, Rf = 0.35 (chloroform:methanol = 9: 1).
Example 16: Analogously to Example 2, N-(3-cyclohexyl-carboxamido-phenyl)-4-(3-pyridyl)-2-pyrimi(lme-amine is prepared from cyclohexanecarboxylic acid chloride; m.p. 205-206°, Rf = 0.36 (chloroform:methanol = 9:1).
Example 17: Analogously to Example 2, N-[3-(4-memylbenzoylamido)-phenyl]-4-(3-pyridyl)-2-pyriinidine-amine is prepared from 4-methylbenzoyl chloride; m.p. 214-216°, Rf = 0.64 (chloroform:methanol = 9:1).
Example 18: Analogously to Example 2, N-[3-(4-chloro-benzoylamido)-phenyl]-4-(4-pyridyl)-2-pyrimicune-amine is prepared by treatment of 100 mg (0.38 mmol) of N-(3-aminophenyl)-4-(4-pyridyl)-2-pyrimidme-amine with 58 μΐ (0.46 mmol) of 4-chloro-benzoyl chloride; m.p. 258-261°; Rf = 0.37 (CHC13 methanol = 9:1). - 30 - The starting material is obtained as follows: Step 18.1: Analogously to Step 2.1, N-(3-ammophenyl)-4-(4-pyridyl)-2-pyrimidine-amine is obtained by treatment of 300 mg (1.0 mmol) of N-(3-nitrophenyl)-4-(4-pyridyl)-2-pyrirmdine-amine (see Example 11) under a hydrogen atmosphere; m.p. 200-202°, Rf = 0.27 (CHCl3:methanol = 95:5).
Example 19: Analogously to Example 2, N-{3-[4-(4-methylpiperazinomethyl)-benzoyl-amido]-phenyl}^(3-pyridyl)-2-pyrimidine-amine is prepared from 98 mg (0.3 mmol) of 4-(4-methyl-piperazinomethyl)-benzoyl chloride; m.p. 198-201°.
Example 20: A solution of 8.0 g (28.85 mmol) of N-(5-arnino-2-methylphenyl)-4-(3-pyridyl)-2-pyrimidine-amine and 4.0 ml (34.6 mmol) of benzoyl chloride in 320 ml of pyridine are stirred under nitrogen at room temperature for 23 hours. The reaction mixture is concentrated under HV; 200 ml of water are added and, after cooling to 0°, the mixture is filtered. After drying at 80° under HV, the crude product is made into a slurry with CH2Cl2/methanol (95:5) and filtered, yielding N-(5-benzoylamido-2-methylphenyl)-4-(3-pyridyl)-2-pyrirnidine-amine. After separation by chromatography there are obtained further amounts of that product; m.p. 173-176°, Rf = 0.65 (CHCl3:methanol = 9:1).
The starting material is obtained as follows: Step 20.1: 9.1 ml (0.13 mol) of 65 % nitric acid are added drop wise in the course of 5 minutes to a yellow suspension of 20.0 g (0.13 mol) of 2-amino-4-nitrotoluene in 50 ml of absolute ethanol. When the exothermic reaction has subsided, 8.32 g (0.198 mol) of cyanamide dissolved in 8.3 ml of water are added. The brown reaction mixture is boiled at reflux for 25 hours, cooled to 0° and filtered. Washing with 4 x 100 ml of ethanol/-diethyl ether (1:1) and drying yield 2-methyl-5-nitrophenyl-guanidine nitrate; m.p. 219-226°.
Step 20.2: 248.2 g (0.96 mol) of 2-memyl-5-nitrophenylguanidine nitrate are added to a solution of 170 g (0.96 mol) of 3-dimethylamino-l-(3-pyridyl)-2-propen-l-one in 2.0 litres of isopropanol. After the addition of 42.5 g of sodium hydroxide, the reddish suspension is boiled at reflux for 12 hours. After cooling to 0°, filtration, washing with 2.0 litres of isopropanol and 3 x 400 ml of methanol and drying, there is obtained N-(2-methyl-5-nitro-phenyl)-4-(3-pyridyl)-2-pyrimidine-amine, m.p. 195-198°, Rf = 0.68 (methylene chloride:- - 31 - methanol = 9.1).
Step 20.3: A suspension of 143.0 g (0.46 mol) of N-(2-methyl-5-nitrophenyl)-4-(3-pyridyl)-2-pyrimidine-amine in 7.15 litres of ethyl acetate is stirred with 14.3 g of palladium on active carbon (10 % Pd) under a hydrogen atmosphere at normal pressure for 6.5 hours. The suspension is filtered and the filtrate is concentrated in a rotary evaporator. The crude product is recrystallised from methylene chloride, yielding N-(5-amino-2-memylphenyl)-4-(3-pyridyl)-2-pyrirru^ne-amine; rap. 138-140°, Rf = 0.36 (methylene chloride:methanol = 9:1).
Example 21: Analogously to Example 20, N-{5-[4-(4-memyl-piperazino-methyl)-benzoyl-amido]-2-memylphenyl}-4-(3-pyridyl)-2-pyrimi(lme-amine is prepared from 10.68 g (32.8 mmol) of 4-(4-methyl-piperazinomethyl)-benzoyl chloride; m.p. 211-213°, Rf = 0.33 (methylene chloride:methanol:25 % aqueous ammonia solution = 95:5:1).
Example 22: Analogously to Example 20, N-[5-(4-methyl-benzoylamido)-2-methyl-phenyl]-4-(3-pyridyl)-2-pyrirnidme-amine is prepared from 0.23 ml (1.7 mmol) of p-toluoyl chloride (p-toluyl chloride); m.p. 102-106°, Rf = 0.4 (methylene chloride:-methanol = 9:1).
Example 23: Analogously to Example 20, N-[5-(2-naphthoylamido)-2-methylphenyl]-4-(3-pyridyl)-2-pyrinudine-amine is prepared from 330 mg (1.73 mmol) of 2-naphthoyl chloride; m.p. 97-101°, Rf = 0.45 (methylene chloride:methanol = 9:1).
Example 24: Analogously to Example 20, N-[5-(4-chloro-benzoylamido)-2-methyl-phenyl]-4-(3-pyridyl)-2-pyrimidme-amine is synthesised from 0.22 ml (1.73 mmol) of 4-chlorobenzoyl chloride; m.p. 216-219°, Rf = 0.39 (methylene chloride:methanol = 9: 1).
Example 25: Analogously to Example 20, N-[5-(2-methoxy-benzoylamido)-2-methyl-phenyl]-4-(3-pyridyl)-2-pyrimidine-amine is prepared from 0.28 ml (1.87 mmol) of 2-methoxybenzoyl chloride; m.p. 88-92°, Rf = 0.45 (methylene chloride:methanol = 9:1).
Example 26: Analogously to Example 1, N-(3-trifluoromethoxy-phenyl)-4-(3-pyridyl)-2-pyrimidine-amine is obtained from 1.0 g (5.68 mmol) of 3-dimethylamino-l-(3-pyridyl)-2-propen-l-one and 1.53 g (5.68 mmol) of 3-trifluoromethoxyphenyl-guanidine nitrate; Rf = 0.7 (chloroform:methanol = 9:1). 32 The starting material is obtained as follows: Step 26.1: Analogously to Step 1.1» 3-trifluoromethoxy-phenyl-guanidine nitrate is prepared from 2.0 g (11.3 mmol) of 3-trifluoromethoxy-aniline and 1.4 g (16.6 mol) of cyanamide (50 % in water); Rf = 0.1 (methylene chloride:methanol:25 % aqueous ammonia solution = 150:10:1).
Example 27: Analogously to Example 1, N-(3-[l,l,2,2-tetrafluoroethoxy]-phenyl)-4-(3-pyridyl)-2-pyrimidine-amine is obtained from 1.0 g (5.68 mmol) of 3-dimethylamino- 1- (3-pyridyl)-2-propen-l-one and 1.78 g (5.68 mmol) of 3-(l,l,2,2-tetrafluoroethoxy)-phenyl-guanidine nitrate; Rf = 0.75 (chloroform:methanol = 9:1).
The starting material is obtained as follows: Step 27.1: Analogously to Step 1.1 , 3-( 1 , 1 ,2,2-tetrafluoro-emoxy)-phenyl-guanidine nitrate is prepared from 2.09 g (10 mmol) of 3-(l,l,2,2-tetrafluoroethoxy)-aniline and 1.26 g (15 mol) of cyanamide (50 % in water); Rf = 0.15 (methylene chloride:methanol:-25 % aqueous ammonia solution = 150:10:1).
Example 28: Analogously to Example 1, N-(3-nitro-5-methyl-phenyl)-4-(3-pyridyl)-2-pyrimidine-amine is obtained from 1.0 g (5.68 mmol) of 3-dime±ylainino-l-(3-pyridyl)- 2- propen-l-one and 1.46 g (5.68 mmol) of 3-nitro-5-methylphenyl-guanidine nitrate; Rf = 0.72 (chloroform:methanol = 9:1).
The starting material is obtained as follows: Step 28.1: Analogously to Step 1.1, 3-nitro-5-methyl-phenyl-guanidine nitrate is prepared from 1.52 g (10 mmol) of 3-nitro-5-methylaniline and 1.26 g (15 mol) of cyanamide (50 % in water); Rf = 0.1 (methylene chloride:methanol:25 % aqueous ammonia solution = 150:10:1).
Example 29: Analogously to Example 1, N-(3-nitro-5-trifluoromethylphenyl)-4-(3-pyridyl)-2-pyrimi(iine-amine is obtained from 1.0 g (5.68 mmol) of 3-dimethylamino-l-(3-pyridyl)-2-propen-l-one and 1.76 g (5.68 mmol) of 3-nitro-5-trifluoromethylphenyl-guanidine nitrate; Rf = 0.8 (chloroform:methanol = 9:1). - 33 - The starting material is obtained as follows: Step 29.1: Analogously to Step 1.1, 3-nitro-5-trifluoromethylphenyl-guanidine nitrate is prepared from 2.06 g (10 mmol) of 3-nitro-5-trifluoromethylaniline and 1.26 g (15 mol) of cyanamide (50 % in water); Rf = 0.2 (methylene chloride:methanol:25 % aqueous ammonia solution = 150:10:1).
Example 30: 200 mg (0.68 mmol) of N-(3-nitrophenyl)-4-(3-pyridyl)-2-pyrimi(.ine-amine are suspended in 5 ml of methylene chloride, and 225 mg (0.71 mmol) of 3-chloroperbenzoic acid are added. After 2 hours a further 10 ml of methylene chloride are added. The suspension is stirred for a further 20 hours at room temperature. Filtration and flash chromatography of the residue (methylene chloride:methanol:25 % aqueous ammonia solution = 90:10:1) yield N-(3-nitro-phenyl)-4-(N-oxido-3-pyridyl)-2-pyrimidine-anTine; Rf = 0.4 (methylene chloride:methanol:25 % aqueous ammonia solution = 90:10:1), m.p. 252-258°.
Example 31: 150 mg (0.39 mmol) of N-(3-benzoylamido-5-methylphenyl)-4-(3-pyridyl)-2-pyrimidine-amine are suspended in 6 ml of methylene chloride, and 129 mg (0.41 mmol) of 3-chloroperbenzoic acid are added. After 22 hours, the mixture is filtered and the residue is purified by flash chromatography (methylene chloride:methanol:25 % aqueous ammonia solution = 90:10:1), yielding N-(3-benzoylamido-5-methylphenyl)-4-(N-oxido-3-pyridyl)-2-pyrirnidine-amine; Rf = 0.3 (methylene chloride:methanol:25 % aqueous ammonia solution = 90:10:1), m.p. 295-300°.
Example 32: Tablets comprising 20 mg of active ingredient, for example one of the compounds of formula I described in Examples 1 to 31, and having the following composition are prepared in customary manner: - 34 - Composition: active ingredient 20 mg wheat starch 60 mg lactose 50 mg colloidal silicic acid 5 mg talc 9 mg magnesium stearate 1 mg 145 mg Preparation: The active ingredient is mixed with a portion of the wheat starch, with the lactose and the colloidal silicic acid and the mixture is forced through a sieve. A further portion of the wheat starch is made into a paste, on a water bath, with five times the amount of water and the powder mixture is kneaded with the paste until a slightly plastic mass is obtained.
The plastic mass is pressed through a sieve of about 3 mm mesh size and dried, and the resulting dry granules are again forced through a sieve. Then the remainder of the wheat starch, the talc and the magnesium stearate are mixed in and the mixture is compressed to form tablets weighing 145 mg and having a breaking notch.
Example 33: Tablets comprising 1 mg of active ingredient, for example one of the compounds of formula I described in Examples 1 to 31, and having the following composition are prepared in customary manner: 1 mg 60 mg 50 mg 5 mg 9 mg 1 mg 126 mg Preparation: The active ingredient is mixed with a portion of the wheat starch, with the - 35 lactose and the colloidal silicic acid and the mixture is forced through a sieve. A further portion of the wheat starch is made into a paste, on a water bath, with five times the amount of water and the powder mixture is kneaded with the paste until a slightly plastic mass is obtained.
The plastic mass is pressed through a sieve of about 3 mm mesh size and dried, and the resulting dry granules are again forced through a sieve. Then the remainder of the wheat starch, the talc and the magnesium stearate are mixed in and the mixture is compressed to form tablets weighing 126 mg and having a breaking notch.
Example 34: Capsules comprising 10 mg of active ingredient, for example one of the compounds of formula I described in Examples 1 to 31, are prepared in customary manner as follows: Composition: active ingredient 2500 mg talc 200 mg colloidal silicic acid 50 mg Preparation: The active ingredient is intimately mixed with the talc and the colloidal silicic acid and the mixture is forced through a sieve of 0.5 mm mesh size and then introduced in 11 mg portions into hard gelatin capsules of a suitable size.
Claims (30)
1. - 36 - What is claimed is: 1. An N-phenyl-2-pyrimidme-amine derivative of formula I wherein Ri is 4-pyrazinyli 1 -methyl- lH-pyrrolyl, amino- or amino-lower alkyl-substituted phenyl wherein the amino group in each case is free, alkylated or acylated, lH-indolyl or lH-imidazolyl bonded at a fivermembered ring carbon atom, or unsubstituted or lower alkyl-substituted pyridyl bonded at a ring carbon atom and unsubstituted or substituted at the nitrogen atom by oxygen, R2 and R3 are each independently of the other hydrogen or lower alkyl, underlinedone or two of the radicals R4, R5, R6, R7 and R8 are each nitro, fluoro-substituted lower 1# ^ alkoxy or a radical of formula Π -N(R9)-C(=X)-(Y)n-R10 (Π), wherein R9 is hydrogen or lower alkyl, X is oxo, thio, imino, N-lower alkyl-imino, hydroximino or O-lower alkyl-hydrox- imino, Y is oxygen or the group NH, n is 0 or 1 and R10 is an aliphatic radical having at least 5 carbon atoms, or an aromatic, aromatic- aliphatic, cycloaliphatic, cycloaliphatic-aliphatic, heterocyclic or heterocyclic- aliphatic radical, and the remaining radicals R4, Rs, R7 and Rg are each independently of the others - 37 - hydrogen, lower alkyl that is unsubstituted or substituted by free or alkylated amino, piperazinyl, piperidinyl, pyirolidinyl or by morpholinyl, or lower alkanoyl, trifluoro- methyl, free, etherified or esterifed hydroxy, free, alkylated or acylated amino or free or esterified car boxy, or a salt of such a compound having at least one salt-forming group.
2. A compound of formula I according to claim 1, wherein one or two of the radicals R4, R5, Rg, R7 and R8 are each nitro or a radical of formula Π wherein R9 is hydrogen or lower alkyl, X is oxo, thio, imino, N-lower alkyl-imino, hydroximino or O-lower alkyl-hydrox- irnino, Y is oxygen or the group NH, n is 0 or 1 and R10 is an aliphatic radical having at least 5 carbon atoms or an aromatic, aromatic- aliphatic, cycloaliphatic, cycloaliphatic-aliphatic, heterocyclic or heterocyclic- aliphatic radical, and the remaining radicals R4, R5, Rg, R7 and R8 are each independently of the others hydrogen, lower alkyl that is unsubstituted or substituted by free or alkylated amino, piperazinyl, piperidinyl, pyirolidinyl or by morpholinyl, or lower alkanoyl, trifluoro- methyl, free, etherified or esterifed hydroxy, free, alkylated or acylated amino or free or esterified carboxy, and the remaining substituents are as defined in claim 1, or a salt of such a compound having at least one salt-forming group.
3. A compound of formula I according to claim 1, wherein Rj is 4-pyrazinyl, 1-methyl-lH-pyrrolyl, amino- or amino-lower alkyl-substituted phenyl wherein the amino group in each case is free, alkylated by one or two lower alkyl radicals or acylated by lower alkanoyl or by benzoyl, lH-indolyl or lH-imidazolyl bonded at a five-membered ring carbon atom, or unsubstituted or lower alkyl-substituted pyridyl bonded at a ring carbon atom and unsubstituted or substituted at the nitrogen atom by oxygen, R2 and R3 are each independently of the other hydrogen or lower alkyl, one or two of the radicals R4, R5, Rg, R7 and Rg are each nitro, fluoro-substituted lower alkoxy or a radical of formula Π wherein R9 is Hydrogen or lower alkyl, - 38 - X is oxo, thio, imino, N-lower alkyl-imino, hydroximino or O-lower alkyl-hydrox- imino, Y is oxygen or the group NH, n is 0 or 1 and R10 is an aliphatic hydrocarbon radical having 5-22 carbon atoms, a phenyl or naphthyl radical each of which is unsubstituted or substituted by cyano, lower alkyl, hydroxy-lower alkyl, amino-lower alkyl, (4-methyl-piperazinyl)-lower alkyl, tri- fluoromethyl, hydroxy, lower alkoxy, lower alkanoyloxy, halogen, amino, lower alkylamino, di-lower alkylamino, lower alkanoylamino, benzoylamino, carboxy or by lower alkoxycarbonyl, or phenyl-lower alkyl wherein the phenyl radical is unsubstituted or substituted as indicated above, a cycloalkyl or cycloalkenyl radical having up to 30 carbon atoms, cycloalkyl-lower alkyl or cycloalkenyl-lower alkyl each having up to 30 carbon atoms in the cycloalkyl or cycloalkenyl moiety, a monocyclic radical having 5 or 6 ring members and 1-3 ring hetero atoms selected from nitrogen, oxygen and sulfur, to which radical one or two benzene radicals may be fused, or lower alkyl substituted by such a monocyclic radical, and the remaining radicals R4, R5, Rg, R7 and R8 are each independently of the others hydrogen, lower alkyl that is unsubstituted or substituted by amino, lower alkylamino, di-lower alkylamino, piperazinyl, piperidinyl, pyrrolidinyl or by morpho- linyl, or lower alkanoyl, trifluoromethyl, hydroxy, lower alkoxy, lower alkanoyloxy, halogen, amino, lower alkylamino, di-lower alkylamino, lower alkanoylamino, benzoylamino, carboxy or lower alkoxycarbonyl, or a salt of such a compound having at least one salt-forming group.
4. A compound of formula I according to claim 1, wherein Rj is pyridyl bonded at a ring carbon atom and unsubstituted or substituted at the nitrogen atom by oxygen, R2 and R3 are each hydrogen, R4 is hydrogen or lower alkyl, R5 is hydrogen, lower alkyl or fluoro-substituted lower alkoxy, Rg is hydrogen, R7 is nitro, fluoro-substituted lower alkoxy or a radical of formula Π wherein R9 is hydrogen, X is oxo, n is 0 and R10 is an aliphatic hydrocarbon radical having 5-22 carbon atoms, a phenyl radical that - 39 is unsubstituted or substituted by cyano, lower alkyl, (4-methyl-piperazinyl)-lower alkyl, lower alkoxy, halogen or by carboxy; a cycloalkyl radical having up to 30 carbon atoms or a monocyclic radical having 5 or 6 ring members and 1-3 sulfur ring atoms, and R8 is hydrogen, or a pharmaceutically acceptable salt of such a compound having at least one salt-forrning group.
5. A compound of formula I according to claim 1, wherein Rj is pyridyl or N-oxido-pyridyl each of which is bonded at a carbon atom, R2 and R3 are each hydrogen, R4 is hydrogen or lower alkyl, R5 is hydrogen, lower alkyl or trifluoromethyl, R6 is hydrogen, R7 is nitro, fluoro-substimted lower alkoxy or a radical of formula Π wherei R9 is hydrogen, X is oxo, n is the number 0 and R10 is pyridyl bonded at a carbon atom, phenyl that is unsubstituted or substituted by halogen, cyanp, lower alkoxy, carboxy, lower alkyl or by 4-methyl-piperazinyl- methyl, or C5-C7alkyl, thienyl, 2-naphthyl or cyclohexyl, and R8 is hydrogen, or a pharmaceutically acceptable salt of such a compound having at least one salt-forming group. v
6. A compound according to any one of claims 1 to 5 of formula I, wherein R4 and Rg are each hydrogen and the remaining substituents are as defined in the respective generic claim, or a pharmaceutically acceptable salt of such a compound having at least one salt-forming group.
7. A compound according to any one of claims 1 to 5 of formula I, wherein at least one of the radicals R4 and R8 is lower alkyl, and the remaining substituents are as defined in the respective generic claim, or a pharmaceutically acceptable salt of such a compound having at least one salt-forming group.
8. A compound according to claim 1 of formula I, wherein - 40 - Rt is pyridyl bonded at a carbon atom, R2, R3, R4, R5, R$ and R8 are each hydrogen and R7 is nitro or a radical of formula Π wherein R9 is hydrogen, X is oxo, n is the number 0 and R10 is pyridyl bonded at a carbon atom, phenyl that is unsubstituted or substituted by fluorine, chlorine, cyano, lower alkoxy, carboxy, lower alkyl or by 4-methyl-piper- azinyl-methyl, or Cj-C/alkyl, thienyl or cyclohexyl, f or a pharmaceutically acceptable salt thereof.
9. N-(3-Nitrc-phenyl)-4-(3-pyridyl)-2-pyrimidine-amine or a pharmaceutically acceptable salt thereof according to claim 1.
10. N-[3-(4-CMorobenzoylamido)-phenyl]-4-(3-py^^ or a pharmaceutically acceptable salt thereof according to claim 1.
11. N-(3-Benzoylamido-phenyl)-4-(3-pyridyl)-2-pyrimidme-amine or a pharmaceutically acceptable salt thereof according to claim 1. i
12. N-[3-(2^Pyridyl)carboxamido-phenyl]-4-(3-pyridyl)-2-pyrimidm or a pharmaceutically acceptable salt thereof according to claim 1.
13. N-[3-(3-Pyridyl)carboxamido-phenyl]-4-(3-pyrid or a pharmaceutically acceptable salt thereof according to claim 1.
14. N-[3-(4-Pyridyl)carboxamido-phenyl]-4-^ or a pharmaceutically acceptable salt thereof according to claim 1.
15. N-(3-Pentafluoro-benzoylamido-phenyl)-4-(3-pyridyl)-2-pyriinid^ or a pharmaceutically acceptable salt thereof according to claim 1.
16. N-[3-(2-Carboxy-ben∞ylarnido)-pheny¾ or a pharmaceutically acceptable salt thereof according to claim 1. V-"
17. N-(3-n-Hexanoylamido-phenyl)-4-(3-pyridyl)-2-pyrimidme-amme or a - 41 - pharmaceutically acceptable salt thereof according to claim 1.
18. N-(3-Nitro-phenyl)-4-(2-pyridyl)-2-pyrimidine-amine or a pharmaceutically acceptable salt thereof according to claim 1.
19. N-(3-Nitro-phenyl)-4-(4-pyridyl)-2-pyrimidiiie-amine or a pharmaceutically v acceptable salt thereof according to claim 1.
20. N-[3-(2-Methoxy-benzoylamido)-phenyl]-4-(3-pyridyl)-2-pyrimidme-ani^ or a pharmaceutically acceptable salt thereof according to claim 1.
21. N-[3-(4-RuOTCHbenzoylamido)-phenyl]-4-(3-pyridyl)-2-pyrimidm or a pharmaceutically acceptable salt thereof according to claim 1.
22. N-[3-(4-Cyano-benzoylamido)-phenyl]-4-(3-pyridyl)-2-pyrimidme-amine or a pharmaceutically acceptable salt thereof according to claim 1.
23. N-[3-(2-T¾ienylcarboxamido)-phenyl]-4-(3-pyridyl)-2-pyrimidine-amine or a pharmaceutically acceptable salt thereof according to claim 1.
24. N-(3-Cyclohexylcarboxamido-phenyl)-4-(3-pyridyl)-2-pyiimidme-amine or a ^ pharmaceutically acceptable salt thereof according to claim 1.
25. N-[3-(4-Memyl-benzoylamido)-phenyl]-4-(3-pyridyl)-2-pyrimidme-amine or a pharmaceutically acceptable salt thereof according to claim 1.
26. N-[3-(4-Chloro-benzoylamido)-phenyl]-4-(4-pyridyl)-2-pyrimidine-anune or a pharmaceutically acceptable salt thereof according to claim 1.
27. N- { 3-[4-(4-Memyl-piperazinometnyl)-benzoylamido]-phenyl } -4-(3-pyridyl)-2-pyri-midine-amine or a pharmaceutically acceptable salt thereof according to claim 1.
28. N-(5-Benzoylaniido-2-methyl-phenyl)-4-(3-pyrM^^ or a pharmaceutically acceptable salt thereof according to claim 1.
29. N-{5-[4-(4-Methyl-piperazino-methyl)-benzoylamido]-2-methyl-phenyl}-4-(3-pyri- - 42 - dyl)-2-pyrimidine-amine or a pharmaceutically acceptable salt thereof according to claim 1.
30. N-[5-(4-Methyl-benzoylamido)-2-methyl-phenyl]-4-^ a pharmaceutically acceptable salt thereof according to claim 1. pharmaceutically acceptable salt thereof according to claim 1. 32. N-[5-(4-Chloro-benz»ylamido)-2-methyl-pte or a pharmaceutically acceptable salt thereof according to claim 1. 33. N-[5-(2-Methoxy-benw)ylamido)-2-methyl-phenyl]-^ or a pharmaceutically acceptable salt thereof according to claim 1. 34. N-(3-Trifluoromethoxy-phenyl)-4-(3-pyridyl)-2-pyrimidme-amm or a pharmaceutically acceptable salt thereof according to claim 1. 35. N-(3-[l,l,2 -Tetrafluoro-ethoxy]-phenyl)-4-(3-py^ a pharmaceutically acceptable salt thereof according to claim 1. 36. N-(3-Nitro-5-methyl-phenyl)-4-(3-pyridyl)-2-pyrimidme-amm or a pharmaceutically acceptable salt thereof according to claim 1. 37. N-(3-Nitrc^5-trifluoromemyl-phenyl)-4-(3-pyridyl)-2-pyrimid^ or a pharmaceutically acceptable salt thereof according to claim 1. 38. N-( -Nitro-phenyl)-4-(N-oxido-3-pyridyl)-2-pyrimidme-amm according to claim 1. 39. N-(3-Benzoylamido-5-methyl-phenyl)-4-(N-oxido-3-pyridyl)-2-pyrhi-i according to claim 1. 40. A pharmaceutical composition comprising a compound of formula I according to any ' one of claims 1 to 39 or a pharmaceutically acceptable salt of such a compound having at least one salt-forming group together with a pharmaceutical carrier. - 43 - 41. A pharmaceutical composition for the treatment of tumours in warm-blooded animals including humans, comprising, in a dose effective against tumours, a compound of formula I according to any one of claims 1 to 39, or a pharmaceutically acceptable salt of such a compound having at least one salt-forming group, together with a pharmaceutical carrier. 43. A process for the preparation of a compound of formula I according to claim 1 or of a salt of such a compound having at least one salt-forming group, which comprises a) reacting a compound of formula HI wherein Rn and R12 are each independently of the other lower alkyl and R^ R2 and R3 are as defined above, functional groups present in a compound of formula HI, with the exception of the groups participating in the reaction, being if necessary in protected form, or a salt of such a compound, with a compound of formula IV (IV), - 44 - wherein the substituents are as defined above, functional groups present in a compound of formula IV, with the exception of the guanidino group participating in the reaction, being if necessary in protected form, or with a salt of such a compound, and removing any protecting groups present, or b) for the preparation of a compound of formula I wherein the radicals R4, R5, Rg, R7 and R8 are as defined above with the exception of nitro and fluoro-substituted lower alkoxy, reacting a compound of formula V wherein one or two of the radicals R13, R14, R15, R16 and Ri7 are each amino and the remaining radicals R^, R14, R^, R16 and R17 are each independently of the others hydrogen, lower alkyl that is unsubstituted or substituted by free or alkylated amino, piperazinyl, piperidinyl, pyrrolidinyl or by morpholinyl, or lower alkanoyl, trifluoro-methyl, free, etherified or esterified hydroxy, free, alkylated or acylated amino or free or esterified carboxy, and the remaining substituents are as defined above, functional groups present in a compound of formula V, with the exception of the amino group(s) participating in the reaction, being if necessary in protected form, with a compound of formula VI HO-C(=X)-(Y)n-R10 (VI), wherein the substituents and symbols are as defined above, functional groups present in a compound of formula VI, with the exception of the HO-C(=X) group participating in the reaction, being if necessary in protected form, or with a reactive derivative of a compound of formula VI, and removing any protecting groups present, or - 45 - c) for the preparation of a compound of formula I wherein is pyridyl substituted at the nitrogen atom by oxygen, and wherein the other substituents and symbols are as defined above, converting a compound of formula I wherein Ri is pyridyl into the N-oxido compound with a suitable oxidising agent, and, if desired, converting a compound of formula I obtainable by any one of processes a to c into its salt, or converting an obtainable salt of a compound of formula I into the free compound. 1
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