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CA2496249A1 - 8-[3-amino-piperidin-1-yl]-xanthines, the production thereof and the use of the same as medicaments - Google Patents

8-[3-amino-piperidin-1-yl]-xanthines, the production thereof and the use of the same as medicaments Download PDF

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Publication number
CA2496249A1
CA2496249A1 CA002496249A CA2496249A CA2496249A1 CA 2496249 A1 CA2496249 A1 CA 2496249A1 CA 002496249 A CA002496249 A CA 002496249A CA 2496249 A CA2496249 A CA 2496249A CA 2496249 A1 CA2496249 A1 CA 2496249A1
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Canada
Prior art keywords
methyl
group
amino
piperidin
xanthine
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Granted
Application number
CA002496249A
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French (fr)
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CA2496249C (en
Inventor
Frank Himmelsbach
Elke Langkopf
Matthias Eckhardt
Michael Mark
Roland Maier
Ralf Richard Hermann Lotz
Mohammad Tadayyon
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Boehringer Ingelheim Pharma GmbH and Co KG
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Individual
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Priority claimed from DE10238243A external-priority patent/DE10238243A1/en
Priority claimed from DE10312353A external-priority patent/DE10312353A1/en
Application filed by Individual filed Critical Individual
Publication of CA2496249A1 publication Critical patent/CA2496249A1/en
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Publication of CA2496249C publication Critical patent/CA2496249C/en
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Abstract

The present invention relates to substituted xanthines of general formula (see formula I), wherein R1 is a substituted methyl or ethyl, R2 is a methyl, isopropyl or phenyl, and R3 is an optionally substituted alkenyl or substituted methyl, the stereoisomers, the mixtures, the prodrugs thereof and the salts thereof which have valuable pharmacological properties, particularly an inhibiting effect on the activity of the enzyme dipeptidylpeptidase-IV (DPP-IV).

Claims (22)

1. Compounds of general formula wherein R1 denotes a methyl group which is substituted by a dimethylaminocarbonyl, pyrrolidin-1-ylcarbonyl, piperidin-1-ylcarbonyl, tert.-butylcarbonyl or a cyclohexylcarbonyl group, a methyl group which is substituted by a naphthyl, methylnaphthyl, methoxynaphthyl, nitronaphthyl or (dimethylamino)-naphthyl group, a methyl group which is substituted by a 2-phenylethenyl or a biphenylyl group, a methyl group which is substituted by a phenyl-oxadiazolyl, 5-methyl-3-phenyl-isoxazolyl, phenyl-pyridinyl, indolyl, benzothiophenyl, quinolinyl, isoquinolinyl, methylisoquinolinyl, (methoxycarbonylmethylamino)-isoquinolinyl, cinnolinyl, quinazolinyl, methylquinazolinyl, 1,2-dihydro-1-methyl-2-oxo-quinolinyl, 1,2-dihydro-2-methyl-1-oxo-isoquinolinyl, 3,4-dihydro-4-oxo-phthalazinyl, 3,4-dihydro-3-methyl-4-oxo-phthalazinyl, 3,4-dihydro-4-oxo-quinazolinyl, 3,4-dihydro-3-methyl-4-oxo-quinazolinyl or a 2-oxo-2H-chromenyl group, a 2-methoxyethyl, 2-phenyloxyethyl or 2-cyanoethyl group, a phenylcarbonylmethyl or a 1-(phenylcarbonyl)-ethyl group, a phenylcarbonylmethyl group wherein the phenyl moiety is substituted by an amino, cyanomethylamino, methylcarbonylamino, ethylcarbonylamino, isopropylcarbonylamino, methoxycarbonylamino, (ethyloxycarbonylamino)-carbonylamino or a 2-oxo-imidazolidin-1-yl group, a phenylcarbonylmethyl group wherein the phenyl moiety is substituted by a carboxy, methoxycarbonyl, ethyloxycarbonyl, aminocarbonyl, methylaminocarbonyl, dimethylaminocarbonyl or morpholin-4-ylcarbonyl group, a phenylcarbonylmethyl group wherein the phenyl moiety is substituted by a methylsulphanyl, methylsulphinyl or methylsulphonyl group, a phenylcarbonylmethyl group wherein the phenyl moiety is substituted by a carboxymethoxy, ethyloxycarbonylmethoxy, isopropyloxycarbonylmethoxy, aminocarbonylmethoxy, methylaminocarbonylmethoxy, ethylaminocarbonylmethoxy, isopropylaminocarbonylmethoxy, dimethylaminocarbonylmethoxy, pyrrolidin-1-ylcarbonylmethoxy or morpholin-4-ylcarbonylmethoxy group, a phenylcarbonylmethyl group wherein the phenyl moiety is substituted by a 1-(methoxycarbonyl)-ethyloxy or a 1-(aminocarbonyl)-ethyloxy group, a phenylcarbonylmethyl group wherein the phenyl moiety is substituted by a methylsulphinylmethoxy group, a phenylcarbonylmethyl group wherein the phenyl moiety is substituted by two methoxy groups or a phenylcarbonylmethyl group wherein in the phenyl moiety two adjacent hydrogen atoms are replaced by a -O-CH2-O, -O-CH2-CH2-O or a -N(CH3)-CO-O group, R2 denotes a methyl, isopropyl or phenyl group and R3 denotes a 2-methyl-2-propen-1-yl, 2-chloro-2-propen-1-yl or 3-bromo-2-propen-1-yl group a 2-buten-1-yl or 2,3-dimethyl-2-buten-1-yl group, a 2-butyn-1-yl group, a 1-cyclopenten-1-ylmethyl group or a 2-furanylmethyl group, as well as the compounds 1-(2-cyano-ethyl)-3-methyl-7-(2-cyano-benzyl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-(2-{2-[(ethoxycarbonyl)methoxy]-phenyl}-2-oxo-ethyl)-3-methyl-7-(3-methyl-
2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-(2-{2-[(aminocarbonyl)methoxy]-phenyl}-2-oxo-ethyl)-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-(2-{3-[(methanesulphinyl)methoxy]-phenyl}-2-oxo-ethyl)-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-(1-methyl-2-oxo-2-phenyl-ethyl)-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-(2-phenoxy-ethyl)-3-methyl-7-(2-cyano-benzyl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-(2-phenyl-2-oxo-ethyl)-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-(2-{3-[(ethoxycarbonyl)methoxy]-phenyl}-2-oxo-ethyl)-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-(2-{2-[(methylaminocarbonyl)methoxy]-phenyl}-2-oxo-ethyl)-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-(2-{2-[(dimethylaminocarbonyl)methoxy]-phenyl}-2-oxo-ethyl)-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-(2-methoxy-ethyl)-3-methyl-7-(2-cyano-benzyl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-methyl-3-[(methoxycarbonyl)methyl]-7-(2-cyano-benzyl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-methyl-3-cyanomethyl-7-(2-cyano-benzyl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-methyl-3-(2-propyn-1-yl)-7-(2-cyano-benzyl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-{2-[3-(2-oxo-imidazolidin-1-yl)-phenyl]-2-oxo-ethyl}-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-methyl-3-(2-propen-1-yl)-7-(2-cyano-benzyl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-(2-{2-[(ethylcarbonyl)amino]-phenyl}-2-oxo-ethyl)-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-methyl-3-phenyl-7-(2-cyano-benzyl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[2-(2-amino-phenyl)-2-oxo-ethyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-((S)-
3-amino-piperidin-1-yl)-xanthine, 1-(2-phenyl-2-oxo-ethyl)-3-cyanomethyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[(quinolin-2-yl)methyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[(2-oxo-2H-chromen-4-yl)methyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[(cinnolin-4-yl)methyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[(1-methyl-2-oxo-1,2-dihydro-quinolin-4-yl)methyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[(4-oxo-3,4-dihydro-phthalazin-1-yl)methyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[(quinazolin-4-yl)methyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[(5-methyl-3-phenyl-isoxazol-4-yl)methyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[(isoquinolin-3-yl)methyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[(3-phenyl-[1,2,4]oxadiazol-5-yl)methyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[(4-phenyl-pyridin-2-yl)methyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[(5-phenyl-pyridin-2-yl)methyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[(3-methyl-4-oxo-3,4-dihydro-phthalazin-1-yl)methyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[2-(3-methylsulphanyl-phenyl)-2-oxo-ethyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[2-(3-methanesulphinyl-phenyl)-2-oxo-ethyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[2-(3-methanesulphonyl-phenyl)-2-oxo-ethyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[2-(3-carboxy-phenyl)-2-oxo-ethyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[2-(3-methoxycarbonyl-phenyl)-2-oxo-ethyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-{2-[3-(methylaminocarbonyl)-phenyl]-2-oxo-ethyl}-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-{2-[3-(dimethylaminocarbonyl)-phenyl]-2-oxo-ethyl}-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-{2-[3-(morpholin-4-yl-carbonyl)-phenyl]-2-oxo-ethyl}-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[2-(2-carboxy-phenyl)-2-oxo-ethyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[2-(2-ethoxycarbonyl-phenyl)-2-oxo-ethyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-{2-[2-(dimethylaminocarbonyl)-phenyl]-2-oxo-ethyl}-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-{2-[2-(morpholin-4-yl-carbonyl)-phenyl]-2-oxo-ethyl}-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[2-(2,6-dimethoxy-phenyl)-2-oxo-ethyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-((E)-3-phenyl-allyl)-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[(benzo[b]thiophen-3-yl)methyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[(1H-indol-3-yl)methyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[(biphenyl-4-yl)methyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-(2-cyclohexyl-2-oxo-ethyl)-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-(3,3-dimethyl-2-oxo-butyl)-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-({5-[(methoxycarbonyl)methylamino]-isoquinolin-1-yl}methyl)-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-(2-dimethylamino-2-oxo-ethyl)-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[2-(piperidin-1-yl)-2-oxo-ethyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[(2-methyl-1-oxo-1,2-dihydro-isoquinolin-4-yl)methyl]-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[2-(2,3-dimethoxy-phenyl)-2-oxo-ethyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[2-(pyrrolidin-1-yl)-2-oxo-ethyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[2-(2,3-dihydro-benzo[1,4]dioxin-5-yl)-2-oxo-ethyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[2-(3-methyl-2-oxo-2,3-dihydro-benzooxazol-7-yl)-2-oxo-ethyl]-3-methyl-7 (3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[2-(benzo[1,3]dioxol-4-yl)-2-oxo-ethyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-methyl-3-isopropyl-7-(2-cyano-benzyl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[2-(2-cyanomethylamino-phenyl)-2-oxo-ethyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[(isoquinolin-1-yl)methyl]-3-[(methoxycarbonyl)methyl]-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-(2-{2-[(isopropyloxycarbonyl)methoxy]-phenyl}-2-oxo-ethyl)-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[2-(2-{[(ethoxycarbonylamino)carbonyl]amino}-phenyl)-2-oxo-ethyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[2-(2-acetylamino-phenyl)-2-oxo-ethyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-((S)-3-amino-piperidin-1-yl)-xanthine, 1-(2-{2-[(methylaminocarbonyl)methoxy]-phenyl}-2-oxo-ethyl)-3-methyl-7-(3-methyl-2-buten-1-yl)-8-((S)-3-amino-piperidin-1-yl)-xanthine, 1-methyl-7-(2-cyano-benzyl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-(2-{2-[(isopropylcarbonyl)amino]-phenyl}-2-oxo-ethyl)-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-(2-{2-[(methoxycarbonyl)amino]-phenyl}-2-oxo-ethyl)-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[2-(3-methyl-2-oxo-2,3-dihydro-benzooxazol-4-yl)-2-oxo-ethyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[2-(2-nitro-3-methoxy-phenyl)-2-oxo-ethyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[2-(2-amino-3-methoxy-phenyl)-2-oxo-ethyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[2-(2-oxo-2,3-dihydro-benzooxazol-7-yl)-2-oxo-ethyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[(3-methyl-isoquinolin-1-yl)methyl]-3-methyl-7-(3-methyl-1-buten-1-yl)-8-((R)-3-amino-piperidin-1-yl)-xanthine, 1-[(3-methyl-isoquinolin-1-yl)methyl]-3-methyl-7-(2-cyano-benzyl)-8-(3-amino-piperidin-1-yl)-xanthine, 1-[2-(3-carboxymethoxy-phenyl)-2-oxo-ethyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine and 1-[2-(2-carboxymethoxy-phenyl)-2-oxo-ethyl]-3-methyl-7-(3-methyl-2-buten-1-yl)-8-(3-amino-piperidin-1-yl)-xanthine, the tautomers, enantiomers, diastereomers, the mixtures thereof, the prodrugs thereof and the salts thereof.

2. Compounds of general formula I according to claim 1, wherein R1 denotes a 4-methoxy-1-naphthylmethyl group, a 2-quinolinylmethyl, 4-quinolinylmethyl or a 6-quinolinylmethyl group, a 1-isoquinolinylmethyl, 3-methyl-1-isoquinolinylmethyl, 4-methyl-1-isoquinolinylmethyl or a 3-isoquinolinylmethyl group or a 2-quinazolinylmethyl, 4-methyl-2-quinazolinylmethyl or a 4-quinazolinyl-methyl group, R2 denotes a methyl group and R3 denotes a 2-buten-1-yl or a 2-butyn-1-yl group, the tautomers, enantiomers, diastereomers, the mixtures thereof and the salts thereof.

3. Compounds of general formula I according to claim 1, wherein R1 denotes a [2-(methylcarbonylamino)-phenyl]-carbonylmethyl group, a [2-(ethylcarbonylamino)-phenyl]-carbonylmethyl group or a [2-(isopropylcarbonylamino)-phenyl]-carbonylmethyl group, R2 denotes a methyl group and R3 denotes a 2-buten-1-yl or a 2-butyn-1-yl group, the tautomers, enantiomers, diastereomers, the mixtures thereof and the salts thereof.
4. Compounds of general formula I according to claim 1, wherein R1 denotes a [2-(aminocarbonylmethoxy)-phenyl]-carbonylmethyl group, [2-(methylaminocarbonylmethoxy)-phenyl]-carbonylmethyl group, a [2-(ethylaminocarbonylmethoxy)-phenyl]-carbonylmethyl group or a [2-(isopropylaminocarbonylmethoxy)-phenyl]-carbonylmethyl group, R2 denotes a methyl group and R3 denotes a 2-buten-1-yl group, a 2-butyn-1-yl group or a 1-cyclopenten-1-ylmethyl group, the tautomers, enantiomers, diastereomers, the mixtures thereof and the salts thereof.
5. Compounds of general formula I wherein R1 denotes a methyl group which is substituted by a naphthyl, fluoronaphthyl, methylnaphthyl, methoxynaphthyl, (difluoromethoxy)-naphthyl, cyanonaphthyl, nitronaphthyl or (dimethylamino)-naphthyl group, a methyl group which is substituted by a phenanthrenyl group, a methyl group which is substituted by a 2-phenylethenyl, 2-[(trifluoromethyl)-phenyl]-ethenyl, 2-(nitrophenyl)ethenyl, 2-(pentafluorophenyl)ethenyl or a biphenylyl group, a methyl group which is substituted by a phenyloxadiazolyl, phenylpyridinyl, indolyl, methylindolyl, dimethyl-6,7-dihydro-5H-[2]pyrindinyl, benzimidazolyl, methylbenzimidazolyl, (cyanoethyl)-benzimidazolyl, (methylamino-carbonylmethyl)benzimidazolyl, benzylbenzimidazolyl, benzofuranyl, acetylbenzofuranyl, cyanobenzofuranyl, benzoxazolyl, nitrobenzoxazolyl, benzothiophenyl, methylbenzothiazolyl, quinolinyl, methoxyquinolinyl, isoquinolinyl, methylisoquinolinyl, (difluoromethyl)-isoquinolinyl, (trifluoromethyl)-isoquinolinyl, dimethylisoquinolinyl, (1-cyano-1-methyl-ethyl)isoquinolinyl, phenylisoquinolinyl, methoxyisoquinolinyl, methoxy-chloro-isoquinolinyl, methoxy-bromo-isoquinolinyl, (methoxycarbonylmethylamino)-isoquinolinyl, dimethyl-5,6,7,8-tetrahydroisoquinolinyl, 1,2,3,4-tetrahydro-phenanthridinyl, cinnolinyl, quinazolinyl, methylquinazolinyl, isopropylquinazolinyl, cyclopropylquinazolinyl, phenylquinazolinyl, aminoquinazolinyl, (dimethylamino)-quinazolinyl, pyrrolidin-1-ylquinazolinyl, piperidin-1-ylquinazolinyl, piperazin-1-ylquinazolinyl, morpholin-4-ylquinazolinyl, ethoxyquinazolinyl, isopropyloxyquinazolinyl, phenyl-oxyquinazolinyl, imidazo[1,2-a]pyridinyl, methylimidazo[1,2-a]pyridinyl, phenyl-imidazo[1,2-a]pyridinyl, benzylimidazo[1,2-a]pyridinyl, pyrazolo[1,5-a]pyridinyl, quinoxalinyl, methylquinoxalinyl, dimethylquinoxalinyl, trimethylquinoxalinyl, phenylquinoxalinyl, methylphthalazinyl, naphthyridinyl, 2,3-dihydro-benzo[1,4]-dioxinyl, 1,2-dihydro-2-oxo-quinolinyl, 1,2-dihydro-1-methyl-2-oxo-quinolinyl, 1,2-dihydro-2-methyl-1-oxo-isoquinolinyl, 3,4-dihydro-4-oxo-phthalazinyl, 3,4-dihydro-3-methyl-4-oxo-phthalazinyl, 3,4-dihydro-4-oxo-quinazolinyl, 3,4-dihydro-3-methyl-4-oxo-quinazolinyl or a 2-oxo-2H-chromenyl group, a phenylcarbonylmethyl group, a phenylcarbonylmethyl group wherein the phenyl moiety is substituted by an amino, cyanomethylamino, (ethyloxycarbonylmethyl)amino, (methylaminocarbonyl)methylamino, methylcarbonylamino, ethylcarbonylamino, isopropylcarbonylamino, phenylcarbonylamino, methoxycarbonylamino, (ethyloxycarbonylamino)-carbonylamino or a 2-oxo-imidazolidin-1-yl group, a phenylcarbonylmethyl group wherein the phenyl moiety is substituted by a phenyl group, a phenylcarbonylmethyl group wherein the phenyl moiety is substituted by a carboxy, methoxycarbonyl, ethyloxycarbonyl, aminocarbonyl, methylaminocarbonyl, dimethylaminocarbonyl or morpholin-4-ylcarbonyl group, a phenylcarbonylmethyl group wherein the phenyl moiety is substituted by a methylsulphanyl, methylsulphinyl or methylsulphonyl group, a phenylcarbonylmethyl group wherein the phenyl moiety is substituted by a methoxy, difluoromethoxy, trifluoromethoxy, ethyloxy, isopropyloxy or phenyloxy group, a phenylcarbonylmethyl group wherein the phenyl moiety is substituted by a methylsulphinylmethoxy, carboxymethoxy, ethyloxycarbonylmethoxy, isopropyloxycarbonylmethoxy, aminocarbonylmethoxy, methylaminocarbonylmethoxy, ethylaminocarbonylmethoxy, isopropylamino-carbonylmethoxy, dimethylaminocarbonylmethoxy, pyrrolidin-1-ylcarbonylmethoxy or morpholin-4-ylcarbonylmethoxy group, a phenylcarbonylmethyl group wherein the phenyl moiety is substituted by a 1-(ethyloxycarbonyl)-1-methyl-ethyloxy, 1-(methoxycarbonyl)-ethyloxy or a 1-(aminocarbonyl)-ethyloxy group, a phenylcarbonylmethyl group wherein the phenyl moiety is substituted by two methoxy groups, a phenylcarbonylmethyl group wherein the phenyl moiety is substituted by a methoxy group and a nitro group, a phenylcarbonylmethyl group wherein the phenyl moiety is substituted by a methoxy group and an amino group, a phenylcarbonylmethyl group wherein in the phenyl moiety two adjacent hydrogen atoms are replaced by a -O-CH2-O, -O-CF2-O, -O-CH2-CH2-O, -NH-CO-NH, -N(CH3)-CO-NH, -N(CH3)-CO-N(CH3), -NH-CO-O- or a -N(CH3)-CO-O group, a (2-phenylethyl)carbonylmethyl group, a naphthylcarbonylmethyl, indolylcarbonylmethyl or quinolinylcarbonylmethyl group or a 2-cyanimino-2-phenyl-ethyl group, R2 denotes a methyl, isopropyl, cyclopropyl, phenyl or fluorophenyl group and R3 denotes a 2-methyl-2-propen-1-yl, 2-chloro-2-propen-1-yl or 3-bromo-2-propen-1-yl group a 1-buten-1-yl, 3-methyl-1-buten-1-yl, 2-buten-1-yl, 2-methyl-2-buten-1-yl-or 2,3-dimethyl-2-buten-1-yl group, a 2-butyn-1-yl group, a 1-cyclopenten-1-ylmethyl group or a 2-furanylmethyl group, the tautomers, enantiomers, diastereomers, the mixtures thereof, the prodrugs thereof and the salts thereof.
6. Compounds of general formula I according to claim 5, wherein R1 and R2 are defined as in claim 5 and R3 denotes a 1-buten-1-yl, 2-buten-1-yl or 2-butyn-1-yl group, the tautomers, enantiomers, diastereomers, the mixtures thereof and the salts thereof.
7. Compounds of general formula I according to claim 6, wherein R1 denotes a methyl group which is substituted by a naphthyl, fluoronaphthyl, methylnaphthyl, methoxynaphthyl, (difluoromethoxy)-naphthyl, cyanonaphthyl or nitronaphthyl group, a methyl group which is substituted by a 2-(pentafluorophenyl)ethenyl group, a methyl group which is substituted by a benzofuranyl, methylbenzothiazolyl, quinolinyl, methoxyquinolinyl, isoquinolinyl, methylisoquinolinyl, (difluoromethyl)-isoquinolinyl, (trifluoromethyl)-isoquinolinyl, dimethylisoquinolinyl, (1-cyano-1-methyl-ethyl)isoquinolinyl, phenyl-isoquinolinyl, methoxyisoquinolinyl, 1,2,3,4-tetrahydrophenanthridinyl, quinazolinyl, methylquinazolinyl, isopropylquinazolinyl, cyclopropyl-quinazolinyl, phenylquinazolinyl, aminoquinazolinyl, (dimethylamino)-quinazolinyl, pyrrolidin-1-ylquinazolinyl, piperidin-1-ylquinazolinyl, piperazin-1-ylquinazolinyl, morpholin-4-ylquinazolinyl, ethoxyquinazolinyl, isopropyloxyquinazolinyl, quinoxalinyl, methylquinoxalinyl, dimethylquinoxalinyl, trimethylquinoxalinyl, phenylquinoxalinyl, [1,5]naphthyridinyl, [1,6]naphthyridinyl, [1,8]naphthyridinyl or a 1,2-dihydro-methyl-2-oxo-quinolinyl group, a phenylcarbonylmethyl group, a phenylcarbonylmethyl group wherein the phenyl moiety is substituted by a phenyl group, a phenylcarbonylmethyl group wherein the phenyl moiety is substituted by a methoxy, difluoromethoxy, trifluoromethoxy, ethyloxy, isopropyloxy or phenyloxy group, a phenylcarbonylmethyl group wherein in the phenyl moiety two adjacent hydrogen atoms are replaced by a -O-CH2-O, -O-CF2-O, -O-CH2-CH2-O, -N(CH3)-CO-N(CH3) or a -N(CH3)-CO-O group, a naphthylcarbonylmethyl, indolylcarbonylmethyl or quinolinylcarbonylmethyl group or a 2-cyanimino-2-phenyl-ethyl group, R2 denotes a methyl, isopropyl, cyclopropyl, phenyl or 4-fluorophenyl group and R3 denotes a 1-buten-1-yl, 2-buten-1-yl or a 2-butyn-1-yl group, the tautomers, enantiomers, diastereomers, the mixtures thereof and the salts thereof.
8. Compounds of general formula I according to claim 5, wherein R1 and R2 are defined as in claim 7 and R3 denotes a 1-buten-1-yl group, the tautomers, enantiomers, diastereomers, the mixtures thereof and the salts thereof.
9. Compounds of general formula I according to claim 5, wherein R1 and R2 are defined as in claim 7 and R3 denotes a 2-buten-1-yl group, the tautomers, enantiomers, diastereomers, the mixtures thereof and the salts thereof.
10. Compounds of general formula I according to claim 5, wherein R1 and R2 are defined as in claim 7 and R3 denotes a 2-butyn-1-yl group, the tautomers, enantiomers, diastereomers, the mixtures thereof and the salts thereof.
11. Compounds of general formula I wherein R1 denotes a methyl group which is substituted by a naphthyl, fluoronaphthyl, methylnaphthyl, methoxynaphthyl, (difluoromethoxy)-naphthyl, cyanonaphthyl or nitronaphthyl- group, a methyl group which is substituted by a 2-(pentafluorophenyl)ethenyl group, or a methyl group which is substituted by a benzofuranyl, methylbenzothiazolyl, quinolinyl, methoxyquinolinyl, isoquinolinyl, methylisoquinolinyl, (difluoromethyl)-isoquinolinyl, (trifluoromethyl)-isoquinolinyl, dimethylisoquinolinyl, (1-cyano-1-methyl-ethyl)isoquinolinyl, phenyl-isoquinolinyl, methoxyisoquinolinyl, 1,2,3,4-tetrahydrophenanthridinyl, quinazolinyl, methylquinazolinyl, isopropylquinazolinyl, cyclopropyl-quinazolinyl, phenylquinazolinyl, aminoquinazolinyl, (dimethylamino)-quinazolinyl, pyrrolidin-1-ylquinazolinyl, piperidin-1-ylquinazolinyl, piperazin-1-ylquinazolinyl, morpholin-4-ylquinazolinyl, ethoxyquinazolinyl, isopropyloxyquinazolinyl, quinoxalinyl, methylquinoxalinyl, dimethylquinoxalinyl, trimethylquinoxalinyl, phenylquinoxalinyl, [1,5]naphthyridinyl, [1,6]naphthyridinyl, [1,8]naphthyridinyl or a 1,2-dihydro-methyl-2-oxo-quinolinyl group, R2 denotes a methyl, isopropyl, cyclopropyl or phenyl group and R3 denotes a 2-chlorobenzyl, 2-bromobenzyl, 2-ethynylbenzyl or 2-cyanobenzyl group, the tautomers, enantiomers, diastereomers, the mixtures thereof and the salts thereof.
12. Compounds of general formula I according to claim 11, wherein R1 denotes a (3-methyl-isoquinolin-1-yl)methyl group, R2 denotes a methyl group and R3 denotes a 2-chlorobenzyl, 2-bromobenzyl, 2-ethynylbenzyl or 2-cyanobenzyl group, the tautomers, enantiomers, diastereomers, the mixtures thereof and the salts thereof.
13. Compounds of general formula I according to claim 11, wherein R1 and R2 are defined as in claim 11 and R3 denotes a 2-chlorobenzyl group, the tautomers, enantiomers, diastereomers, the mixtures thereof and the salts thereof.
14. Compounds of general formula I according to claim 11, wherein R1 and R2 are defined as in claim 11 and R3 denotes a 2-bromobenzyl group, the tautomers, enantiomers, diastereomers, the mixtures thereof and the salts thereof.
15. Compounds of general formula I according to claim 11, wherein R1 and R2 are defined as in claim 11 and R3 denotes a 2-ethynylbenzyl group, the tautomers, enantiomers, diastereomers, the mixtures thereof and the salts thereof.
16. Compounds of general formula I according to claim 11, wherein R1 and R2 are defined as in claim 11 and R3 denotes a 2-cyanobenzyl group, the tautomers, enantiomers, diastereomers, the mixtures thereof and the salts thereof.
17. The following compounds of general formula I according to claims 1, 5 and 11:
(1) 1-[(quinazolin-2-yl)methyl]-3-methyl-7-(2-butyn-1-yl)-8-((R)-3-amino-piperidin-1-yl)-xanthine, (2) 1-(2-{2-[(ethylaminocarbonyl)methoxy]-phenyl}-2-oxo-ethyl)-3-methyl-7-(2-butyn-1-yl)-8-((R)-3-amino-piperidin-1-yl)-xanthine, (3) 1-(2-{2-[(methylaminocarbonyl)methoxy]-phenyl}-2-oxo-ethyl)-3-methyl-7-(2-butyn-1-yl)-8-((R)-3-amino-piperidin-1-yl)-xanthine, (4) 1-(2-phenyl-2-oxo-ethyl)-3-methyl-7-((E)-2-buten-1-yl)-8-((R)-3-amino-piperidin-1-yl)-xanthine, (5) 1-[(3-methyl-isoquinolin-1-yl)methyl]-3-methyl-7-(2-butyn-1-yl)-8-((S)-3-amino-piperidin-1-yl)-xanthine, (6) 1-[(3-methyl-isoquinolin-1-yl)methyl]-3-methyl-7-(2-butyn-1-yl)-8-((R)-3-amino-piperidin-1-yl)-xanthine, (7) 1-[(4-methyl-isoquinolin-1-yl)methyl]-3-methyl-7-(2-butyn-1-yl)-8-((S)-3-amino-piperidin-1-yl)-xanthine, (8) 1-[(4-methyl-isoquinolin-1-yl)methyl]-3-methyl-7-(2-butyn-1-yl)-8-((R)-3-amino-piperidin-1-yl)-xanthine, (9) 1-[2-(2,3-dihydro-benzo[1,4]dioxin-5-yl)-2-oxo-ethyl]-3-methyl-7-(2-butyn-1-yl)-8-(3-(R)-amino-piperidin-1-yl)-xanthine, (10) 1-[(4-methoxy-naphthalen-1-yl)methyl]-3-methyl-7-(2-butyn-1-yl)-8-((S)-3-amino-piperidin-1-yl)-xanthine, (11) 1-[(4-methoxy-naphthalen-1-yl)methyl]-3-methyl-7-(2-butyn-1-yl)-8-((R)-3-amino-piperidin-1-yl)-xanthine, (12) 1-[2-(benzo[1,3]dioxol-4-yl)-2-oxo-ethyl]-3-methyl-7-(2-butyn-1-yl)-8-((R)-3-amino-piperidin-1-yl)-xanthine, (13) 1-[(4-methyl-quinazolin-2-yl)methyl]-3-methyl-7-(2-butyn-1-yl)-8-(3-(R)-amino-piperidin-1-yl)-xanthine, (14) 1-(2-{2-[(isopropylcarbonyl)amino]-phenyl}-2-oxo-ethyl)-3-methyl-7-((E)-2-buten-1-yl )-8-((S)-3-amino-piperidin-1-yl)-xanthine, (15) 1-(2-{2-[(methylaminocarbonyl)methoxy]-phenyl}-2-oxo-ethyl)-3-methyl-7-((E)-2-buten-1-yl)-8-((R)-3-amino-piperidin-1-yl)-xanthine, (16) 1-(2-{2-[(methylaminocarbonyl)methoxy]-phenyl}-2-oxo-ethyl)-3-methyl-7-((E)-2-buten-1-yl)-8-((S)-3-amino-piperidin-1-yl)-xanthine, (17) 1-(2-{2-[(isopropylcarbonyl)amino]-phenyl}-2-oxo-ethyl)-3-methyl-7-(2-butyn-1-yl)-8-((R)-3-amino-piperidin-1-yl)-xanthine, (18) 1-(2-{2-[(isopropylcarbonyl)amino]-phenyl}-2-oxo-ethyl)-3-methyl-7-((E)-2-buten-1-yl)-8-((R)-3-amino-piperidin-1-yl)-xanthine, (19) 1-[(4-cyano-naphthalen-1-yl)methyl]-3-methyl-7-(2-butyn-1-yl)-8-((R)-3-amino-piperidin-1-yl)-xanthine, (20) 1-[(4-phenyl-quinazolin-2-yl)methyl]-3-methyl-7-(2-butyn-1-yl)-8-((R)-3-amino-piperidin-1-yl)-xanthine, (21) 1-[(8-methyl-quinoxalin-6-yl)methyl]-3-methyl-7-(2-butyn-1-yl)-8-((R)-3-amino-piperidin-1-yl)-xanthine, (22) 1-[(4-fluoro-naphthalen-1-yl)methyl]-3-methyl-7-(2-butyn-1-yl)-8-((R)-3-amino-piperidin-1-yl)-xanthine , (23) 1-((E)-3-pentafluorophenyl-allyl)-3-methyl-7-(2-butyn-1-yl)-8-((R)-3-amino-piperidin-1-yl)-xanthine , (24) 1-[(3-trifluoromethyl-isoquinolin-1-yl)methyl]-3-methyl-7-(2-butyn-1-yl)-((R)-3-amino-piperidin-1-yl)-xanthine, (25) 1-[(3-difluoromethyl-isoquinolin-1-yl)methyl]-3-methyl-7-(2-butyn-1-yl)-8-((R)-3-amino-piperidin-1-yl)-xanthine, (26) 1-[2-(biphenyl-2-yl)-2-oxo-ethyl]-3-methyl-7-(2-butyn-1-yl)-8-((R)-3-amino-piperidin-1-yl)-xanthine, (27) 1-[(3-methyl-isoquinolin-1-yl)methyl]-3-cyclopropyl-7-(2-butyn-1-yl)-8-((R)-3-amino-piperidin-1-yl)-xanthine, (28) 1-[2-(3-methoxy-phenyl)-2-oxo-ethyl]-3-methyl-7-(2-butyn-1-yl)-8-((R)-3-amino-piperidin-1-yl)-xanthine, (29) 1-[(3-methyl-isoquinolin-1-yl)methyl]-3-methyl-7-(2-chloro-benzyl)-8-((R)-3-amino-piperidin-1-yl)-xanthine and (30) 1-[(3-methyl-isoquinolin-1-yl)methyl]-3-methyl-7-(2-bromo-benzyl)-8-((R)-3-amino-piperidin-1-yl)-xanthine as well as the tautomers, enantiomers, diastereomers, the mixtures thereof and the salts thereof.
18. Physiologically acceptable salts of the compounds according to at least one of claims 1 to 17 with inorganic or organic acids or bases.
19. Pharmaceutical compositions containing a compound according to at least one of claims 1 to 17 or a physiologically acceptable salt according to claim 18 optionally together with one or more inert carriers and/or diluents.
20. Use of a compound according to at least one of claims 1 to 18 for preparing a pharmaceutical composition which is suitable for treating type I
and type II diabetes mellitus, arthritis, obesity, allograft transplantation and calcitonin-induced osteoporosis.
21. Process for preparing a pharmaceutical composition according to claim 19, characterised in that a compound according to at least one of claims 1 to 18 is incorporated in one or more inert carriers and/or diluents by a non-chemical method.
22. Process for preparing the compounds of general formula I according to claims 1 to 18, characterised in that a) a compound of general formula wherein R1 to R3 are defined as in claims 1 to 16 and Z1 denotes a leaving group such as a halogen atom, a substituted hydroxy, mercapto, sulphinyl, sulphonyl or sulphonyloxy group, is reacted with 3-aminopiperidine, the enantiomers or the salts thereof, or b) a compound of general formula wherein R1, R2 and R3 are defined as in claims 1 to 16, is deprotected, or c) to prepare a compound of general formula I wherein R1 according to the definition mentioned in claim 1 contains a carboxy group:
a compound of general formula wherein R2 and R3 are defined as in claims 1 to 16 and R1' contains a carboxy group protected by a C1-4-alkyl group, is deprotected and/or subsequently, if desired, any protecting groups used during the reaction are cleaved and/or the compounds of general formula I thus obtained are resolved into their enantiomers or diastereomers and/or the compounds of formula I thus obtained are converted into the salts thereof, particularly for pharmaceutical use into the physiologically acceptable salts thereof with inorganic or organic acids or bases.
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