DK152050B - Analogifremgangsmaade til fremstilling af oxazolopyridiner - Google Patents
Analogifremgangsmaade til fremstilling af oxazolopyridiner Download PDFInfo
- Publication number
- DK152050B DK152050B DK284973AA DK284973A DK152050B DK 152050 B DK152050 B DK 152050B DK 284973A A DK284973A A DK 284973AA DK 284973 A DK284973 A DK 284973A DK 152050 B DK152050 B DK 152050B
- Authority
- DK
- Denmark
- Prior art keywords
- carbon atoms
- alkyl
- pyridine
- halogen
- oxazolo
- Prior art date
Links
- 238000002360 preparation method Methods 0.000 title claims description 24
- 238000000034 method Methods 0.000 title claims description 14
- -1 methylenedioxy Chemical group 0.000 claims description 34
- 150000001875 compounds Chemical class 0.000 claims description 17
- 229920000137 polyphosphoric acid Polymers 0.000 claims description 5
- BFPLMTPHDFFMTG-UHFFFAOYSA-N [1,3]oxazolo[5,4-b]pyridine Chemical class C1=CN=C2OC=NC2=C1 BFPLMTPHDFFMTG-UHFFFAOYSA-N 0.000 claims description 3
- 238000009833 condensation Methods 0.000 claims description 3
- 230000005494 condensation Effects 0.000 claims description 3
- 125000004432 carbon atom Chemical group C* 0.000 claims 26
- 125000000217 alkyl group Chemical group 0.000 claims 13
- 229910052736 halogen Inorganic materials 0.000 claims 6
- 150000002367 halogens Chemical class 0.000 claims 6
- 125000003545 alkoxy group Chemical group 0.000 claims 5
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims 5
- 229910052739 hydrogen Inorganic materials 0.000 claims 4
- 239000001257 hydrogen Substances 0.000 claims 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims 4
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 claims 4
- 125000004385 trihaloalkyl group Chemical group 0.000 claims 4
- 125000004663 dialkyl amino group Chemical group 0.000 claims 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims 2
- 125000004390 alkyl sulfonyl group Chemical group 0.000 claims 2
- 125000004414 alkyl thio group Chemical group 0.000 claims 2
- 125000004093 cyano group Chemical group *C#N 0.000 claims 2
- 125000000753 cycloalkyl group Chemical group 0.000 claims 2
- 125000002541 furyl group Chemical group 0.000 claims 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims 2
- 125000002883 imidazolyl group Chemical group 0.000 claims 2
- 125000001624 naphthyl group Chemical group 0.000 claims 2
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims 2
- 125000004076 pyridyl group Chemical group 0.000 claims 2
- 125000000335 thiazolyl group Chemical group 0.000 claims 2
- 125000000876 trifluoromethoxy group Chemical group FC(F)(F)O* 0.000 claims 2
- 125000004423 acyloxy group Chemical group 0.000 claims 1
- 125000005073 adamantyl group Chemical group C12(CC3CC(CC(C1)C3)C2)* 0.000 claims 1
- 125000005236 alkanoylamino group Chemical group 0.000 claims 1
- 125000003342 alkenyl group Chemical group 0.000 claims 1
- 125000004466 alkoxycarbonylamino group Chemical group 0.000 claims 1
- 125000003282 alkyl amino group Chemical group 0.000 claims 1
- 125000005037 alkyl phenyl group Chemical group 0.000 claims 1
- 125000004644 alkyl sulfinyl group Chemical group 0.000 claims 1
- 125000000043 benzamido group Chemical group [H]N([*])C(=O)C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 claims 1
- 125000003917 carbamoyl group Chemical group [H]N([H])C(*)=O 0.000 claims 1
- 125000000068 chlorophenyl group Chemical group 0.000 claims 1
- 125000004433 nitrogen atom Chemical group N* 0.000 claims 1
- 125000006501 nitrophenyl group Chemical group 0.000 claims 1
- 125000003884 phenylalkyl group Chemical group 0.000 claims 1
- 125000001712 tetrahydronaphthyl group Chemical group C1(CCCC2=CC=CC=C12)* 0.000 claims 1
- 125000003396 thiol group Chemical class [H]S* 0.000 claims 1
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- 239000000243 solution Substances 0.000 description 28
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- 239000002244 precipitate Substances 0.000 description 24
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 21
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- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 12
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- 239000000661 sodium alginate Substances 0.000 description 1
- 229940005550 sodium alginate Drugs 0.000 description 1
- 229910001467 sodium calcium phosphate Inorganic materials 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 1
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 229940048181 sodium sulfide nonahydrate Drugs 0.000 description 1
- WMDLZMCDBSJMTM-UHFFFAOYSA-M sodium;sulfanide;nonahydrate Chemical compound O.O.O.O.O.O.O.O.O.[Na+].[SH-] WMDLZMCDBSJMTM-UHFFFAOYSA-M 0.000 description 1
- 239000007901 soft capsule Substances 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- 229940083466 soybean lecithin Drugs 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 125000005504 styryl group Chemical group 0.000 description 1
- 238000010254 subcutaneous injection Methods 0.000 description 1
- 239000007929 subcutaneous injection Substances 0.000 description 1
- 239000000829 suppository Substances 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
- 125000004495 thiazol-4-yl group Chemical group S1C=NC(=C1)* 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 230000000699 topical effect Effects 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- 231100000397 ulcer Toxicity 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
- C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
- C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D213/62—Oxygen or sulfur atoms
- C07D213/69—Two or more oxygen atoms
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P25/00—Drugs for disorders of the nervous system
- A61P25/04—Centrally acting analgesics, e.g. opioids
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P29/00—Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
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- C07D—HETEROCYCLIC COMPOUNDS
- C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
- C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
- C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D213/61—Halogen atoms or nitro radicals
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
- C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
- C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D213/62—Oxygen or sulfur atoms
- C07D213/63—One oxygen atom
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
- C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
- C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D213/72—Nitrogen atoms
- C07D213/75—Amino or imino radicals, acylated by carboxylic or carbonic acids, or by sulfur or nitrogen analogues thereof, e.g. carbamates
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- C07D—HETEROCYCLIC COMPOUNDS
- C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
- C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
- C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D213/78—Carbon atoms having three bonds to hetero atoms, with at the most one bond to halogen, e.g. ester or nitrile radicals
- C07D213/79—Acids; Esters
- C07D213/80—Acids; Esters in position 3
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- C07D513/00—Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for in groups C07D463/00, C07D477/00 or C07D499/00 - C07D507/00
- C07D513/02—Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for in groups C07D463/00, C07D477/00 or C07D499/00 - C07D507/00 in which the condensed system contains two hetero rings
- C07D513/04—Ortho-condensed systems
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- Neurology (AREA)
- Neurosurgery (AREA)
- Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
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- Pyridine Compounds (AREA)
- Plural Heterocyclic Compounds (AREA)
Description
DK 152050B
Den foreliggende opfindelse angår en analogifremgangsmåde til fremstilling af hidtil ukendte oxazolopyridinderivater, hvilke forbindelser har værdifulde antiinf 1 animatoriske, antipyretiske og analgetiske egenskaber.
Forbindelserne har den i kravet angivne formel I, hvori R, R"*- og m har den der angivne betydning.
Fremgangsmåden ifølge opfindelsen er ejendommelig ved det i kravets kendetegnende del anførte.
De ved fremgangsmåden ifølge opfindelsen fremstillede forbindelser egner sig til behandling af inflammationer, og de udviser endvidere kraftig analgetisk og antipyretisk aktivitet, således at de kan benyttes til behandling af smerte og feber, som ikke er symptomatisk knyttet til en inflammatorisk lidelse.
Det er kendt at anvende forskellige steroider med antiinflammatorisk aktivitet, men det er også kendt, at sådanne steroider har uønske-
2 DK 152050 B
de sidevirkninger, og der har derfor været et behov for at fremstille antiinflammatoriske midler, der ikke er steroider. Derved er fremkommet nogle få meget effektive og værdifulde midler, som adskiller sig fra steroider og ikke har disses uønskede sidevirkninger og kontraindikationer.
Ted fremgangsmåden ifølge opfindelsen er tilvejebragt endnu en gruppe hidtil ukendte forbindelser med høj effektivitet som anti-infl animator i ske, antipyretiske og analgetiske midler. Ligesom andre kendte antiinflammatoriske midler er de omhandlede forbindelser inhibitorer for prostaglandin S syntesen.
Forbindelserne er værdifulde til behandling af arthritis og dermatologiske lidelser, der er følsomme for antiinflammatoriske lægemidler. I almindelighed kan de benyttes til et stort antal lidelser, hvor et eller flere af symptomerne er inflammation, feber og smerte. Eksempler på sådanne lidelser er rheumatisk arthritis, osteoarthritis, gigt, infektiøs arthritis, rheumatisk feber og inflammatoriske angreb af øjnene. Forbindelserne udviser også høj analgetisk og antipyretisk aktivitet.
Til disse formål indgives forbindeiserne oralt, topisk, parenteralt, ved inhalation eller rektalt i doser, der fremstilles på kendt måde ved opblanding i de sædvanlige bærermedier, tilsætningsmidler og fortyndingsmidler. Ted parenteral indgift forstås subkutan injektion, intravenøs, intramuskulær, intrasternal injektion eller infusion. De omhandlede forbindelser kan ikke blot anvendes til behandling af varmblodede dyr, såsom mus, rotter, heste, hunde og katte, men også til behandling af mennesker.
Farmaceutiske præparater indeholdende den aktive bestanddel kan have form af tabletter, piller, vandige eller olieagtige suspensioner, dispergerbare pulvere eller granulater, emulsioner, hårde eller bløde kapsler, sirupper eller eliksirer. Præparater til oral indgift kan fremstilles på i og for sig kendt måde, idet der kan tilsættes de sædvanlige tilsætningsmidler, såsom sødemidler, aromastoffer, farvestoffer og præserveringsmidler, til opnåelse i af hensigtsmæssige og velsmagende præparater. Tabletterne kan indeholde den aktive bestanddel i blanding med ikke-giftige farmaceutisk acceptable fortyndingsmidler, som er egnede til fremstil-
3 DK 152050B
ling af tabletter. Eksempler på sådanne fortyndingsmidler er ealciumcarbonat, natriumcarbonat, lactose, calciumphosphat eller natriumphosphat, granulerings- og disintegreringsmidler, for eksempel majsstivelse eller alginsyre, bindemidler, for eksempel stivelse, gelatine eller acacia, og smøremidler, for eksempel magnesiumstearat, stearinsyre eller talkum. Tabletterne kan om ønsket overtrækkes på kendt måde til opnåelse af præparater med forsinket opløsning og absorption i fordøjelsesorganeme, således at der opnås en virkning i et lasngere tidsrum. Eor eksempel kan der anvendes glycerylmonostearat eller glyceryldistearat som tidsforsinkende materiale.
Orale præparater kan også indføres i hårde gelatinekapsler, hvori den aktive bestanddel blandes med et inert fast fortyndingsmiddel, for eksempel ealciumcarbonat, calciumphosphat eller kaolin, eller bløde gelatinekapsler, hvori den aktive bestanddel blandes med vand eller et olieagtigt medium, for eksempel jordnøddeolie, flydende paraffin eller olivenolie.
Vandige suspensioner indeholder den aktive bestanddel i blanding med fortyndingsmidler til fremstilling af vandige suspensioner.
Eksempler på sådanne fortyndingsmidler er suspenderingsmidler, såsom natriumcarboxymethylcellulose, methyleellulose, hydroxypropylmethyl-cellulose, natriumalginat, polyvinylpyrrolidon, gummi tragacanth og gummi acacia, dispergerings- og fugtemidler, såsom naturligt forekommende phosphatider, for eksempel lecithin, eller kondensationsprodukter af et alkylenoxid og fedtsyre, for eksempel polyoxyethylen-stearat, eller kondensationsprodukter af ethylenoxid med langkædede alifatiske alkoholer, for eksempel heptadecaethylenoxycetanol, eller kondensationsprodukter af ethylenoxid med partielle estere, der er afledt af fedtsyre og en hexitol, såsom polyoxyethylen-sorbitolmonooleat, eller kondensationsprodukter af ethylenoxid med partielle estere, der er afledt af fedtsyre og hexitolanhydrider, for eksempel polyoxyethylensorbitanmonooleat. De nævnte vandige suspensioner kan også indeholde et eller flere præserveringsmidler, for eksempel ethyl-, n-propyl- og p-hydroxybenzoat, eller et eller flere farvestoffer, et eller flere aromastoffer og et eller flere sødemidler, såsom saccharose eller saccharin.
Olieagtige suspensioner kan fremstilles ved suspendering af den ηι.4.4«»Α S π*» μ m T« J *1 λΊ .S λ ara *ι ολΊ ί λ
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olivenolie, sesamolie eller kokosnøddeolie, eller i en mineralolie, såsom flydende paraffin. De olieagtige suspensioner kan indeholde et fortykkelsesmiddel, for eksempel bivoks, hård paraffin eller ce-tyialkohol. Sødemidler, såsom de ovenfor angivne, og aromastoffer kan tilsættes til opnåelse af velsmagende orale præparater. Disse blandinger kan præserveres ved tilsætning af en antioxidant, såsom ascorbinsyre.
Dispergerbare pulvere og granulater, der egner sig til fremstilling af en vandig suspension ved tilsætning af vand, indeholder den aktive bestanddel i blanding med dispergerings- eller fugtemidler, suspenderingsmidler og et eller flere præserveringsmidler. Egnede dispergerings- eller fugtemidler og suspenderingsmidler er nærmere omtalt ovenfor. Der kan tilsættes yderligere fortyndingsmidler, for eksempel sødestoffer, aromastoffer og farvestoffer.
De omhandlede aktive forbindelser kan om ønsket også indgå i olie- i-vand-emulsioner. Den olieagtige fase kan være en vegetabilsk olie, for eksempel olivenolie eller arachisolie, eller en mineralolie, for eksempel flydende paraffin eller blandinger af disse.
Egnede emulgeringsmidler kan være naturligt forekommende gummier, for eksempel gummi acacia eller gummi tragaeanth, naturligt forekommende phosphatider, for eksempel sojabønnelecithin, estere eller partielle estere, afledt af fedtsyre og hexitolanhydrider, for eksempel sorbitanmonooleat, og kondensationsprodukter af de nævnte partielle estere med ethylenoxid, for eksempel polyoxyethylen-sorbitanmonooleat. Emulsionerne kan også indeholde sødemidler og aromastoffer.
Sirupper og eliksirer kan formuleres med sødemidler, for eksempel glycerol, sorbitol eller saccharose. Sådanne præparater kan også indeholde blødgøringsmidler, præserveringsmidler, aromastoffer og farvestoffer. De farmaceutiske præparater kan forekomme i form af sterile injicerbare præparater, for eksempel en steril injicerbar vandig eller olieholdig suspension. Denne suspension kan formuleres på i og for sig kendt måde under anvendelse af egnede dispergerings- eller fugtemidler og suspenderingsmidler som ovenfor angivet. i Det sterile injicerbare præparat kan også indeholde en steril inji- I carbar opløsning eller suspension i et ikke-giftigt parenteralt j acceptabelt fortyndingsmiddel eller opløsningsmiddel, for eksempel j
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en opløsning i 1,3-hutandiol. Blandt acceptable bærermedier og opløsningsmidler kan nævnes vand, Ringer*s opløsning og iso-tonisk natriumchloridopløsning. Desuden kan anvendes sterile, ikke-flygtige olier som opløsningsmidler eller suspenderingsmedium. Til dette formål kan anvendes en vilkårlig blandet fikseret olie, herunder syntetiske mono- eller diglycerider. Desuden kan anvendes fedtsyre, såsom oleinsyre, til fremstilling af inhicerba-re tabletter.
De omhandlede forbindelser kan også indgives i form af suppositorier for rektal indgift af lægemidler. Disse præparater kan fremstilles ved blanding af lægemidlet med et egnet ikke-irriterende fortyndingsmiddel, der er fast ved sædvanlig temperatur, men bliver flydende ved legemstemperaturen, og som derfor vil smelte i rektum til frigivelse af lægemidlet. Sådanne stoffer er kakaosmør og polyethylenglycol.
Til topisk anvendelse kan anvendes cremer,, salver, gelatinøse blandinger, opløsninger eller suspensioner indeholdende det anti-inflammatoriske middel.
Dosisstørrelser kan ligge på 0,5 - 140 mg pr. kilogram legemsvægt, og passende doser til voksne patienter er således fra 25 mg - 7 g· Til behandling af inflammation eller til opnåelse af en anti-pyretisk eller analgetisk aktivitet kan benyttes mellem 0,1 og 50 mg af forbindelsen pr. kilogram legemsvægt pr. dag (5 mg til 3,5 g pr. patient pr. dag). Optimale doser ligger mellem 1 mg og 15 mg pr. kilogram legemsvægt pr. dag (50 mg til 1 g pr. patient pr. dag).
Forholdet mellem den aktive bestanddel og bæremediet kan varieres efter behov. Således kan den aktive bestanddel udgøre mellem 5 og 95 $ af det totale præparat. Enkelte doser kan indeholde fra 25 ®g til 500 mg af den aktive bestanddel.
Mængden af stof, der anvendes ved en behandling, afhænger af sygdommens art og patientens tilstand. Således kan alder, legemsvægt, almindelig sundhedstilstand, køn, diæt, indgivelsestidspunkt, indgivelsesvej, udskillelseshastighed, lægemiddel-kombination og sygdommens art og styrke spille en rolle for valg af terapi.
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Forbindelserne fremstilles som nævnt ved fremgangsmåden ifølge opfindelsen* der er ejendommelig ved det i den kendetegnende del af kravet anførte.
Ifølge en hensigtsmæssig udførelsesform for fremgangsmåden ifølge opfindelsen fremstilles forbindelserne ved kondensationscyclisa-tion af en aminohydroxypyridin med en carboxylsyre, et syre-anhydrid eller syrehalogenid med formlen: O 0 R-C-OH, R-C-O- eller halogenid, i overensstemmelse med følgende reaktionsligning: ^ φ z] R1—V N T + ^C-R3-> pi--N i[ // ‘ R3 m I r-if m [I2 0 I afhængighed af kondensationsmidlets art og i nogen grad af den anvendte aminohydroxypyridin kan reaktionen enten betragtes som en ringslutning i et enkelt fælles trin eller som en to trinsproces, der som første trin omfatter dannelsen af et amid efterfulgt af ringslutning af amidet til dannelse af oxazoloringen. I mange tilfælde har det vist sig tilrådeligt og bekvemt at isolere amidmellemproduktet og foretage ringslutningen i et andet særskilt trin.
Fremgangsmåden ifølge opfindelsen skal i det efterfølgende illustreres nærmere ved hjælp af nogle udførelseseksempler, hvor de med bogstav nummererede eksempler er eksempler på forbindelser, der ikke er omfattet af,den foreliggende opfindelse.
EKSEMPEL_A
! 2-Phenyloxazolo[4,5-b]pyridin j i
En blanding af 21 g 2-amino-3-hydroxypyridin og 130 g benzoesyre- j i anhydrid opvarmes til dannelse af en smelte og derefter, indtil | blandingen begynder at koge. Efter 10 minutter fjernes varmetil-
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førslen, og efter afkøling i flere minutter hældes smelten i 2 liter benzen. Den dannede opløsning ekstraheres med 4 x 200 ml 2,5 N saltsyre. Denne sure opløsning gøres derefter basisk med natriumhydroxidopløsning. Bundfaldet opsamles og omkrystalliseres af 90 ml absolut ethanol, hvorved fås 12,5 g 2-phenyloxazolo-[4,5-b]pyridin, smp.: 125 - 127° C.
Ved anvendelse af samme fremgangsmåde som angivet i eksempel A med den ændring, at benzoesyreanhydridet erstattes med en ækvivalent mængde af et anhydrid med formlen: (R-CO^O, fremstilles 2- R-oxazolo[4,5-b]pyridinen som angivet i tabel I i overensstemmelse med følgende ligning:
RV~v ji ·*· <r-oo)2o-> 'J .....R
"R " RH2 ^
Tabel_I
Eksempel R1 R _Smp. (°C) 1 H 3-pyridyl 155 - 156
EKSEMPEL_B
2-(2-Eluorphenyl)oxazolo[4,5-b]pyridin
En blanding af 5,5 g (0,05 mol) 2-amino-5-hydroxypyridin, 5,6 g (0,04 mol) 2-fluorbenzoesyre og 12 g polyphosphorsyre opvarmes til 175° C og holdes ved denne temperatur i 10 minutter. Efter afkøling hældes lidt af smelten i en blanding af is og vand.
Efter omrøring til dekomponering af polyphosphorsyren gøres blandingen alkalisk med ammoniumhydroxidopløsning. Det dannede bundfald opsamles og omkrystalliseres af benzen/petroleumsether, hvorved fås 4,0 g 2-(2-fluorphenyl)oxazolo[4,5-b]pyridin, smp.: 126 - 127° C.
Ved anvendelse af fremgangsmåden ifølge eksempel B, idet der i stedet for den anvendte 2-fluorbenzoesyre anvendes en ækvivalent mængde af en benzoesyre med formlen: R~COOH, fremstilles de i
8 DK 152050B
tabel II nævnte 2-R-oxazolo[4,5-b]pyridiner i overensstemmelse med følgende lignings
>S>0H
R“ L X + R"C00H -* Rm-f- f Vr
2 N
TABEL_II
Reaktions-Eksempel temperatur nr._(fCJ_R* R_Smp. (°C) 2 210 H β-naphthyl 160 - 161 3 190 H 5-n-propylpyrid- 2-on-3-yl 251 - 252 4 200 H styryl 109 - 110 5 200 H 3-nitrophenyl 199 - 201 6 200 H biphenyl 188 - 189 7 145 H benzyl 95 - 97 8 170 H cyclohexyl 95 - 96 9 175 H 2-bromphenyl 60 - 61 10 210 H 4-methylsulfonyl- phenyl 277 - 279 11 175 H pyrid-2-yl 197 - 198 12 210 H pyrid-4-yl 171 - 173 13 180-205 H 2-methylsulfonyl- phenyl 140 - 144 14 180-185 H thiazol-4-yl 215 - 216 15 180-185 H 3-hydroxyphenyl '209 - 210 16 180-185 H 2-methylthio- phenyl 135,5 - 137,5 17 225 H imidazol-4(eller 5)-yl 271 - 272 18 180-185 H 3-methylthio- phenyl 82 - 84 19 180-185 H 2,3-dimethyl- phenyl 72 - 73 20 180-185 H 4-trifluor- methoxyphenyl 139 - 141
DK 152050B
2-(3-Dimethylaminophenyl)oxazolo[4,5-b3 pyridin EKSEMPEL_21
En blanding af 2,4 g 2-(3-nitrophenyl)oxazolo[4,5-b]pyridin, 6 ml 37 1o formaldehydopløsning, 50 ml eddikesyre og 0,25 g Raney-nik-kel hydrogeneres. Katalysatoren frafiltreres, og filtratet inddampes til tørhed. Remanensen fordeles mellem vandig natriumbi-carbonatopløsning og benzen. Benzenfasen fraskilles, tørres over vandfrit natriumsulfat og inddampes til en olie. Olien optages i methylenchlorid og behandles med tør ether, der er mættet med hydrogenchlorid. Det dannede bundfald opsamles og vaskes med ether, hvorved fås 2-(3-dimethylaminophenyl)oxazolo[4,5-b]-pyridin«2H01, smp.: 208 - 209° C.
Eksempel 22 2-(3-Aminophenyl)oxazolo[4,5-b]pyridin
En blanding af 700 mg 2-(3-nitrophenyl)oxazolo[4,5-b]pyridin i 50 ml ethanol hydrogeneres over 150 mg 5 1° palladium-på-carbon-katalysator. Katalysatoren frafiltreres, og opløsningen inddampes til tørhed. Remanensen omkrystalliseres af chloroform-petroleumsether til dannelse af 2-(3-aminophenyl)oxazolo[4,5-b]]- pyridin, smp,: 179 - 180,5° 0·
Eksempel 23 2-Benzoyloxazolo[4,5-b]pyridin
En blanding af 800 mg 2-benzyloxazolo[4,5-b]pyridin, 2,5 g kalium-permanganat, 35 ml vand og 6 dråber 2,5 I natriumhydroxidopløsning opvarmes til 50 - 55° C i 3 timer. Efter afkøling tilsættes svovlsyre til en pH-værdi på ca. 6 og tilstrækkeligt natriumbisulfit til fjernelse af mangandioxid. Det krystallinske bundfald opsamles og omkrystalliseres af ethylacetat til dannelse af 2-benzoyloxazolo[4,5-b]Pyridin, smp.: 151 - 153° C.
2-( 3-Acetamidophenyl) oxazolo [4, 5-b ]pyridin
10 DK 152050 B
Eksempel 24
En opløsning af 0,63 g 2-(3-aminophenyl)oxazolo[4,5-b]pyridin i 10 ml pyridin behandles med 0,35 ml eddikesyreanhydrid under omrøring. Efter omrøring i 72 timer fortyndes blandingen til 50 ml med vand. Efter omrøring i kort tid og afkøling opsamles det dannede bundfald, der vaskes med vand og tørres. Ted omkrystallisation af ethylacetat fås 2-(3-acetamidophenyl)oxazolo[4,5-b]pyridin, smp.: 201,5 - 202,5° C.
Eksempel 25 2-(2-Methylsulfinylphenyl)oxazolo[4,5-b]pyridin
En opløsning af 0,5 g 2-(2-methylthiophenyl)oxazolo[4,5-b]-pyridin i 50 ml acetone behandles med 3 g natriummetaperiodat.
Efter omrøring i 72 timer ved stuetemperatur fortyndes blandingen med 30 ml vand. Acetonen afdestilleres, og det dannede bundfald omkrystalliseres til dannelse af 2-(2-methylsulfinylphenyl)-oxazolo[4,5-bJpyridin, smp..: 153,5 - 155,5° C.
Fremgangsmåden ifølge eksempel 25 gentages med 2-(3-methylthio-phenyl)oxazolo[4,5-b]pyridin som udgangsmateriale, hvorved fås 2-(3-methylsulfinylphenyl)oxazolo[4,5-b]pyridin.
Eksempel c 2-(2-Fluorphenyl)oxazolo[5,4-b]pyridin
Trin A: Præparation af 3-(2-fluorbenzoylamino)-2-pvridon
Til en opløsning af 3,3 g (0,03 mol) 3-amino-2-pyridon i 75 ml pyridin, afkølet på is, sættes portionsvis 6,3 g (0,04 mol) 2-fluorbenzoylchlorid i løbet af 5 minutter. Efter omrøring i 15 timer ved stuetemperatur hældes blandingen i isvand. Eet dannede bundfald opsamles ved filtrering, vaskes med vand og omkrystalliseres af ethanol, hvorved fås 3-(2-fluorbenzoylamino)-2- J
o _ i pyridon, smp.; 223 C.
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Trin Bi Præparation af 2°(2-fluorphenvl)oxazoloΓ5.4—b1pyridin
En opløsning af 5,4 g 3-(2-fluorbenzoylamino)-2-pyridon i 55 ml phosphoroxychlorid koges under tilbagesvaling i 5 timer. Overskud af phosphoroxychlorid afdampes, og remanensen behandles med is.
Det dannede bundfald opsamles og omkrystalliseres af hexan-petroleumsether, hvorved fås 3,1 g 2-(2-fluorphenyl)oxazolo-[5,4-b]pyridin, smp.: 119 - 120° G.
Ved fremgangsmåden ifølge eksempel C, trin A og B, idet der i stedet for 2-fluorbenzoylchlorid anvendes en ækvivalent mængde af et syrechlorid med formlen: R-COC1, fås 3-(R-carbonylamino)- 2-pyridoner og 2-R-oxazolo[5,4-b]pyridiner, der er angivet i tabel III, i overensstemmelse med følgende reaktioner:
O
/V*h2 1J^V“
A + o>R <\X
Η H
O
Trxn B POCl^ f jT V*
N 0 H
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Tabel III
Eksempel R1 R Produktets smeltepunkt (° C)
Trin A Trin B
26 H 2-furyl 252-253 125-127 27· H 2-nitrophenyl 233-235 123-125 28 H 2-cyanophenyl 282 221 29 H 4-nitrophenyl 307 (dek.) 242-243 3C H 4-methylthiophenyl 228-229 157-159 31 H 4-cyanophenyl 258-260 220-221 32 H 3,4-methylendi- 232-234 185/5-187 oxyphenyl 33 H adamantan-l-yl 246-247 70-71
Eksempel 34 5-Chlor-2-phenyloxazolo[5,4-b ]pyridin
Trin A: Præparation af 5-chlor-3-nitro-2-pyridon 2-Amino-5-chlorpyridin (12,8 g, 0,1 mol) sættes til 50 ml koncentreret svovlsyre. Hertil sættes under omrøring 25 ml koncentreret salpetersyre. Efter at den eksoterme reaktion er overstået afkøles blandingen, som hældes på is. Bundfaldet opsamles og sættes til en blanding af 12 ml koncentreret svovlsyre og 150 ml vand.
Til denne opløsning, afkølet til 0° C, sættes 7 g natriumnitrit portionsvis, og den dannede blanding henstilles til opvarmning til stuetemperatur. Efter afkøling opsamles bundfaldet, der omkrystalliseres af dimethylformamid/ethanol til dannelse af 5-chlor-3-nitro-2-pyridon, smp.: 225 - 227° C.
Trin B: Præparation af 5-benzovlamino-5-chlor-2-pyridon 5-Chlor-3-nitro-2-pyridon (5,3 g) hydrogeneres i 225 ml ethanol og 6 ml eddikesyre i nærværelse af 0,6 g 5 °h palladium-på-carbon. Katalysatoren frafiltreres, og filtratet inddampes til tørhed. Remanensen opløses i 75 ml pyridin, afkølet på is, og behandles i løbet af 15 minutter med 4,8 g benzoylchlorid. Isbadet og reaktionsblandingen henstilles til opvarmning til stuetemperatur. j
13 DK 152050B
Blandingen hældes på 200 g is. Ved fortynding med 500 ml Tand udskilles en olie, der ved vask med vand stivner til dannelse af 4 g fast stof. Den urene 3-benzoylamino-5-chlor-2-pyridon anvendes den direkte i næste trin.
Trin 0: Præparation af 5-chlor-2-phenyloxazolor5.4-blpyridin
En blanding af 2,1 g uren 3-benzoylamino-5-chlor-2-pyridon og 7 g polyphosphorsyre opvarmes i 10 minutter til 140 - 150° C.
Der tilsættes isvand, bundfaldet opsamles på filter, og det faste stof ekstraheres med varm benzen. Benzenen afdampes, og remanensen optages i ether, filtreres gennem aluminiumoxid og inddampes til tørhed, hvorved fås 300 mg 5-chlor-2-phenyloxazolo[5,4-b]pyridin9 smp.: 150 - 151° C.
Eksempel 35 5-Nitro-2-phenyloxazolo[5,4-b]pyridin
Trin A: Præparation af 3-amino-5-nitro-2-pyridon
En opløsning af 5,5 g 3,5-dinitro-2-pyridon i 200 ml methanol indstilles til en pH-værdi på 8 med ammoniumhydroxid. Ved 60 -65° C sættes langsomt en opløsning af 10,8 g natriumsulfid-nonahydrat i 30 ml vand. Efter 1 time ved 60 - 65° C afdampes opløsningsmidlet, og remanensen ekstraheres med varm benzen og eddikesyre til neutralisering af natriumsaltet. Benzenen afdekanteres og afkøles til dannelse af et bundfald. Ved omkrystallisation af methanol fås 3-amino-5-nitro-2-pyridon, smp.: 200 - 201° 0.
Trin B: Præparation af 3-benzoylamino-5-nitro-2-pyridon
En opløsning af 100 mg 3-amino-5-nitro-2-pyridon i 1,5 ml pyridin afkøles og behandles med 200 mg benzoylchlorid. Efter 2 timer tilsættes vand. Den udskilte olie vaskes med vand og udrives med ether. Det dannede stof omkrystalliseres af ethylacetat, hvorved fås 3-benzoylamiho-5-nitro-2-pyridon, smp.: 267 - 268° C.
I.
14 DK 152050 B
Trin G: Præparation af 5-nitro-2-phenyloxazolor5.4-b]pyridin
En blanding af 300 mg 3-benzoylamino-5-nitro-2-pyridon og 1,5 g polyphosphorsyre opvarmes til 180° C i 15 minutter. Blandingen afkøles, vaskes med is, og bundfaldet opsamles. Bundfaldet opløses i ether, opløsningen filtreres gennem aluminiuinoxid og afdampe s, hvorved fås 5-nitro-2-phenyloxazolo[5,4-b]pyridin, smp.: 219 - 220° C.
Eksempel 36 5-Benzoylamino-2-phenyloxazolo[5,4-b ]pyridin
En opløsning af 80 mg 5-amino-2-phenyloxazolo[5,4-b]pyridin i 1 ml pyridin behandles med 0,07 ml benzoylchlorid. Efter henstand i 1 time fortyndes blandingen med isvand. Bundfaldet opsamles og omkrystalliseres af methanol, hvorved fås 5-benzoylamino-2-phenyl-oxazolo[5,4-b]pyridin, smp.: 191 - 192° C.
Eksempel 37 2,5-Diphenyloxazolo[5 > 4-b]pyridin
En blanding af 180 mg 5-amino-2-phenyloxazolo[5,4-b]pyridin, 10 ml benzen og 0,2 ml isoamylnitrit koges under tilbagesvaling i 1,5 timer. Den varme opløsning filtreres og inddampes til tørhed. Remanensen ekstraheres med ether, og ekstrakten filtreres gennem aluminiumoxid og inddampes til tørhed. Den krystallinske remanens omkrystalliseres af ethylacetat, hvorved fås 2,5-diphenyloxazolo-[5»4-b]pyridin, smp.: 151 - 152° G.
Eksempel 38 5-Isopropoxycarbonylamino-2-phenyloxazolo[5,4-b]pyridin
En blanding af 300 mg 5-amino-2-phenyloxazolo[5,4-b]pyridin og 3 ml pyridin afkøles på is, og hertil sættes 0,2 ml isopropyl-chlorformiat. Blandingen holdes i et køleskab i 5 dage og fortyndes med is og vand. Bundfaldet opsamles og omkrystalliseres af isopropanol, hvorved fås 5-isopropoxycarbonylamino-2-phenyl-oxazolo[5,4-b]pyridin, smp.: 210 - 211° C.
2-(4-Carbamylphenyl)oxazolo[5,4-b]pyridin
15 DK 152 05 OB
Eksempel 39
En opløsning af 600 mg 2-(4-cyanophenyl)oxazolo[5,4-b]pyridin i 8 ml koncentreret svovlsyre henstilles ved stuetemperatur i 16 timer. Opløsningen hældes på is,' og det hvide bundfald opsamles på filter, hvorved fås 2-(4-carbamylphenyl)oxazolo[5,4-b]pyridin, smp.: 315° C (dek.).
Eksempel 40 2-(4-Dimethylaminophenyl)oxazolo[5,4-b]pyridin
En blanding af 2,4 g 2-(4-nitrophenyl)oxazolo[5,4-b]pyridin, 7 ml 37 % formaldehydopløsning, 5 ml eddikesyre og 0,25 g Raney-nikkel og 125 ml methanol hydrogeneres. Katalysatoren frafiltreres, og filtratet inddampes til tørhed. Remanensen ekstraheres med vand, og den i vand uopløselige remanens omkrystalliseres af chloroform-petroleumsether til dannelse af 2-(4-dimethylaminophenyl)oxazolo-[5,4-b]pyridin, smp.: 168 - 170° C.
Eksempel 41 2-(2-Aminophenyl)oxazolo[5,4-b]pyridin
En blanding af 700 mg 2-(2-nitrophenyl)oxazolo[5,4-b]pyridin i 50 ml ethanol hydrogeneres over 150 mg 5 f> palladium-på-carbon-katalysator. Katalysatoren frafiltreres, og opløsningsmidlet inddampes til tørhed. Remanensen omkrystalliseres af chloroform-petrol eumsether til dannelse af 2-(2-aminophenyl)oxazolo [5,4-b] - pyridin, smp.: 142 - 144° C.
Eksempel 42 2-(2-Benzoylaminophenyl)oxazolo[5,4-b]pyridin
En iskold opløsning af 1 g 2-(2-aminophenyl)oxazolo[5,4-b]- pyridin i 15 ml tør pyridin behandles ved langsom tilsætning af 1 g benzoylchlorid. Reaktionsblandingen fortyndes med isvand og omrøres i 10 minutter, og det dannede faste stof opsamles på filter og omkrystalliseres med benzen, hvorved fås 2-(2-benzoyl-aminophenyl)oxazolo[5,4-b]pyridin, smp.: 197 - 198° C.
5-Chlor-2-(2-fluorphenyl)oxazolo[5,4-b]pyridin
16 DK 152050 B
Eksempel 43
Trin A: Præparation af 5-chlor-3-(2-fluorbenzoylamino)-2- pyridon__
En opløsning af 1,7 g 5-chlor-3-nitro-2-pyridon i 75 ml ethanol og 2 ml eddikesyre hydrogeneres over 0,2 g 5 % palladium-på-carbon. Katalysatoren frafiltreres, og opløsningen inddampes til tørhed.
Den tørrede remanens opløses i 30 ml pyridin, afkøles på is og "behandles med 1,6 g 2-fluorbenzoylchlorid i løbet af 5 minutter. Blandingen omrøres ved stuetemperatur i ca. 16 timer og hældes på isvand. Det dannede bundfald opsamles på et filter (1,5 g) og anvendes direkte i næste trin uden rensning.
Trin B: Præparation af 5-chlor-2-(2~fluorphenyl)oxazolo- ί5.4-bΊpyridin_
En blanding af 1,5 g af ovennævnte amid og 5 ml polyphosphorsyre opvarmes til 160° C i 10 minutter. Efter afkøling sættes blandingen til isvand. Bundfaldet opsamles og ekstraheres med 75 ml varm benzen, og ekstrakten affarves med aktivt kul og inddampes til tørhed. Remanensen opløses i methylenchlorid og filtreres gennem aluminiumoxid, og filteret vaskes med ether. Produktet, 5-chlor-2-(2-fluorphenyl)oxazolo[5,4-b]pyridin, udkrystalliserer af filtratet og har et smeltepunkt på 140 - 141° c.
Eksempel 44 5-Dimethylamino-2-phenyloxazolo[5,4-b]pyridin 5-Nitro-2-phenyloxazolo[5,4-b]pyridin (1,2 g) i 75 ml methanol, 75 ml benzen, 5 ml eddikesyre og 8 ml 37 % formaldehydopløsning hydrogeneres over 1,5 teskefuld Raney-nikkel. Katalysatoren frafiltreres, og filtratet fortyndes med 10 ml vand og gøres basisk med fast natriumbicarbonat. Blandingen inddampes til tørhed. Remanensen omkrystalliseres af ethylacetat, hvorved fås 5-dimethylamino-2-phenyloxazolo£5,4-b)pyridin, smo.: 127 -129° C.
17 DK 152050 B
Eksempel 45 5- Methoxy-6-methyl-2-phenyloxazolo[5,4-b]pyridin
Trin Å: Præparation af 5-methoxy-2-methvl-6-nitropyridin
Til en iskold blanding af 3 ml koncentreret svovlsyre og 3 ml rygende salpetersyre sættes 0,5 g 3-methoxy-2-methylpyridin i løbet af 5 minutter. Efter spontan opvarmning til stuetempera» tur opvarmes blandingen til 55 - 60° C i 6 timer. Blandingen afkøles og sættes til 35 ml isvand. Efter omrøring i 2 timer op-samles bundfaldet, der tørres, hvorved fås 3-methoxy-2-methyl=6~ nitropyridin, smp.: 99 - 100,5° C.
Trin Bs Præparation af 6-amino-5-methoxy-2-methylpyridin 3-Methoxy-2-methyl-6-nitropyridin (0,317 g) i 20 ml methanol, hydrogeneres over 0,1 g 5 1° palladium-på-carbon. Katalysatoren frafiltreres, og filtratet inddampes til tørhed, hvorved fås 6- amino-3-methoxy-2-methylpyridin, der anvendes direkte i næste trin.
Trin 0: Præparation af 5-methoxy-6-methyl-2-pyridon
Til en iskold blanding af 0,2 ml koncentreret svovlsyre, 2,0 ml vand og 138 mg 6-amino-3“methoxy-2-methylpyridin sættes en opløsning af 75 mg natriumnitrit i 1 ml vand, Ben kolde opløsning henstilles til opvarmning ved stuetemperatur i løbet af 18 timer. Blandingen fortyndes med lidt vand og gøres basisk med fast na-triumbicarbonat. Blandingen ekstraheres med methylenchlorid, og ekstrakten inddampes til tørhed, hvorved fås 120 mg 5-methoxy- 6-methyl-2-pyridon, der anvendes direkte i næste trin.
Trin D: Præparation af 5-methoxv-6-methyl-5-nitro-2-pyridon
Til en blanding af 4,2 g 5-methoxy-6-methyl-2-pyridon i 50 ml iskold koncentreret svovlsyre sættes 2,5 ml koncentreret salpetersyre dråbevis ved ca. 5° C i løbet af 60 minutter. Omrøringen i kulden fortsættes i 18 timer. Blandingen sættes til ca, 700 g is under omrøring. Efter ca. 30 minutter opsamles bundfaldet9 der vaskes med vand og tørres, hvorved fås 3,7 g 5-methoxy-6-methyl-3-nitro-2-pyridon, der anvendes direkte i næste trin.
18 DK 152050 B
Trin E: Præparation af 3-benzoylamino-5-methoxy-6-methyl-2- pyridon_ 5-Methoxy-6-methyl-3-nitro-2-pyridon (1,84 g) i 100 ml methanol hydrogeneres over 0,3 g 5 $ palladium-på-carbon-katalysator. Katalysatoren frafiltreres, og filtratet inddampes til tørhed. Remanensen opløses i 15 ml pyridin og "behandles i kulden med 1,2 ml benzoylchlorid. Efter henstand i 18 timer på is fortyndes blandingen med vand. Bundfaldet opsamles og omkrystalliseres af ethanol. Det dannede stof ekstraheres flere gange med ether, og det uopløselige stof omkrystalliseres af ethanol, hvorved fås 3-benzoylamino-5-methoxy-6-methyl-2-pyridon, smp.: 247 - 248° C.
Trin B: Præparation af 5-methoxy-6-methyl-2-phenyloxazolo- Γ5.4-b]pyridin_
En blanding af 200 mg 3-benzoylamino-5-methoxy-6-methyl-2-pyridon og 3 ml phosphoroxychlorid opvarmes på dampbad i 20 timer. Blandingen inddampes til tørhed, og remanensen optages i ether, gøres basisk med ammoniumhydroxid og fortyndes med vand. Etheren fraskilles, og den vandige fase ekstraheres 3 gange med ether. De forenede etherfaser tørres og inddampes til tørhed, hvorved fås 5-methoxy~6-methyl-2-phenyloxazolo[5,4-bjpyridin, smp.: 167- 168° C.
Eksempel 46 2-(2-Cyanophenyl)oxazolo[4,5-b]pyridin
En blanding af 2,8 g 2-(2-bromphenyl)oxazolo[4,5-b]pyridin, 1,6 g cuprocyanid og 15 ml N-methylpyrrolidinon afluftes ved gen-nembobling af nitrogen gennem blandingen i 5 minutter. Den opvarmes dernæst til 175° C på oliebad og holdes ved denne temperatur i 5 timer under en nitrogenatmosfære, hvorefter der afkøles til stuetemperatur. Reaktionsblandingen behandles med 75 ml 10 io ammoniumhydroxid, og det dannede bundfald udfældes. Bundfaldet ekstraheres med 100 ml kogende methylenchlorid, og methylen-chloridet afdampes. Remanensen omkrystalliseres af methylenchlorid, hvorved fås 2-(2-cyanophenyl)oxazolo[4,5-b]pyridin, smp.: 166 - 167° C.
19 DK 152050 B
Farmakologiske forsøg
Den efterfølgende tabel viser den fordelagtige virkning af forbindelserne fremstillét ved fremgangsmåden ifølge opfindelsen i sammenligning med den kendte forbindelse indomethacin.
TABEL
ID50 mus p.g. Maveblødning
Syntnétaseprøve (læsioner på (cyclooxygenase- Perforeret 2 mm og derover inhibering) tarm, sår i diameter) _^ug/ml_ mg/kg__mg/kg_ άοη
R
2-F 3 4/5 ved 256 2-CN - 0/5 ved 256 2,6-F2 15 0/5 ved 256 3/5 ved 256
Orø'1"·
R
2-F 3 0/5 ved 512 2-CN 14 0/5 ved 256 INDOMETHACIN 10 5/5 ved 2,4
Claims (4)
- 20 DK 152050 B P_a_t_e_n_t_k_r_a_v_^ Analogifremgangsmåde til fremstilling af oxazolopyridiner med den almene formel: i r^V°\ hvori N-atomet findes i 4- eller 7-stillingen, n R er (a) en gruppe med formlen: -v , hvori n er et helt tal 0-3, og X er (1) halogen, (2) alkoxy med 1-6 carbonatomer, (3) alkyl med 1-6 carbonatomer, (4) nitro, (5) phenyl, (6) alkylsulfonyl med 1-6 carbonatomer, (7) trihalogenalkyl med 1-6 carbonatomer, (8) cyano, (9) alkylthio med 1-6 carbonatomer, (10) carbamyl, j (11) dialkylamino med 1-6 carbonatomer i j hver alkylgruppe, 1 (12) alkylsulfinyl med 1-6 carbonatomer, ! (13) trifluormethoxy, (14) hydroxy, (15) alkanoylamino med 1-6 carbonatomer, (16) amino, eller (17) to X-grupper ved nabostillede carbonatomer tilsammen danner methylendioxy, j
- 21 DK 152050 B (b) alkyl med 1-6 carbonatomer, (c) pyridyl, cyanopyridyl, furyl, imidazolyl, thiazolyl, (d) naphthyl eller (e) adamantyl, R1 er (a) halogen, (b) alkyl med 1-6 carbonatomer, (c) nitro, (d) trihalogenalkyl med 1-6 carbonatomer, (e) amino, (f) benzoylamino, (g) alkoxy med 1-6 carbonatomer, (h) dialkylamino med 1-6 carbonatomer i hver alkylgrappe, (i) phenyl, (j) alkoxycarbonylamino med 1-6 carbonatomer i alkoxygruppen, og m er 1 eller 2, idet R er forskellig fra phenyl, chlorphenyl, alkoxyphenylr, alkyl-phenyl, nitrophenyl, phenylalkyl, phenylalkenyl, alkyl eller cyclo-alkyl, hvis R^ er halogen, kendetegnet ved, at iman ved kondensation cycliserer to forbindelser med formlerne: λ—CBi °s /° - r3 · m2 z / o II hvor Z er -OH, halogen, eller R-C-0-, til dannelse af en forbindelse med formlen: 4 3 Rm— hvor er (a) R , hvori n er et helt tal fra 1 - 3, og 1'er
- 22 DK 152050 B (I) hydrogen, ( 2) halogen, ( 3) alkoxy med 1-6 carbonatomer, ( 4) alkyl med 1-6 carbonatomer, ( 5) nitro, ( 6) phenyl, ( 7) alkylsulfonyl med 1-6 carbonatomer, ( 8) trihalogenalkyl med 1-6 carbonatomer, ( 9) cyano, (10) alkylthio med 1-6 carbonatomer, (II) dialkylamino med 1-6 carbonatomer i hver alkylgruppe, (12) alkylamino, (13) mercapto, (14) trifluormethoxy, (15) hydroxy, R2 - (16) SO IT 2 » hvor R er hydrogen eller .alkyl, eller "" R (17) to X-grupper ved nabostillede carbonatomer tilsammen danner methylendioxy, (b) alkyl-<^J^Xn , (c) alkenyl> (d) alkyl med 1-6 carbonatomer, (e) cycloalkyl med 1-6 carbonatomer, (f) naphthyl eller tetrahydronaphthyl, j (g) adamantanyl, (h) -(0H2)w0N, hvor w er 1, 2 eller 3, (i) pyridyl, cyanopyridyl, furyl, imidazolyl eller thiazolyl, i i R4 er (a) hydrogen, (b) halogen, (c) alkyl med 1-6 carbonatomer, (d) nitro,
- 23 DK 152050 B (e) trihalogen-alkyl, eller (f) alkoxy, og m er 1 eller 2, idet kondensationen ikke udføres i nærværelse af polyphosphorsyre ved 130 - 230 °C i et tidsrum fra 5 minutter til 1 time, hvis R1 er hydrogen eller alkyl med 1-4 carbonatomer, og R er alkyl-, alkoxy- eller halogensubstitueret phenyl, hvorefter om ønsket 3 /T3rx n hvis R er -M , hvor X er hydroxy, hydroxygruppen alkyle- X-—/ .R2 res til alkanoyloxy eller -0(CH~) 0 , hvor w er 1, 2 * W eller 3. t1
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK357175A DK138456B (da) | 1972-06-14 | 1975-08-06 | Analogifremgangsmåde til fremstilling af oxazolo(4,5-b)pyridiner. |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US26289872A | 1972-06-14 | 1972-06-14 | |
| US26289872 | 1972-06-14 | ||
| BE147896A BE819177R (fr) | 1972-06-14 | 1974-08-26 | Oxazolo- et thiazolopyridines |
| BE147896 | 1974-08-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DK152050B true DK152050B (da) | 1988-01-25 |
| DK152050C DK152050C (da) | 1988-07-18 |
Family
ID=25648082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK284973A DK152050C (da) | 1972-06-14 | 1973-05-24 | Analogifremgangsmaade til fremstilling af oxazolopyridiner |
Country Status (17)
| Country | Link |
|---|---|
| JP (1) | JPS5943475B2 (da) |
| AR (1) | AR208500A1 (da) |
| AT (1) | AT333277B (da) |
| AU (1) | AU472528B2 (da) |
| BE (2) | BE800868A (da) |
| CA (1) | CA1019741A (da) |
| CS (1) | CS178889B2 (da) |
| DD (1) | DD105237A5 (da) |
| DE (1) | DE2330109A1 (da) |
| DK (1) | DK152050C (da) |
| FI (1) | FI57417C (da) |
| FR (1) | FR2187356B1 (da) |
| GB (1) | GB1421619A (da) |
| LU (1) | LU67786A1 (da) |
| NL (1) | NL184836C (da) |
| SE (2) | SE401675B (da) |
| ZA (1) | ZA733760B (da) |
Families Citing this family (32)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2527321A1 (de) * | 1975-06-19 | 1976-12-23 | Merck & Co Inc | Oxazol eckige klammer auf 4,5-b eckige klammer zu pyridine |
| JPS527992A (en) * | 1975-07-04 | 1977-01-21 | Merck & Co Inc | Oxazolo *4*55b* pyridines |
| NL187021C (nl) * | 1975-07-15 | 1991-05-01 | Merck & Co Inc | Werkwijze ter bereiding van een farmaceutisch preparaat met anti-inflammatoire werking, alsmede werkwijze ter bereiding van voor toepassing daarbij geschikte anti-inflammatoir werkzame 2-fenyl-oxazolo-(4,5-b)pyridinederivaten. |
| US4011326A (en) * | 1975-07-29 | 1977-03-08 | Merck & Co., Inc. | 2-Substituted oxazolo[4,5-b]pyridine anti-inflammatory agents |
| US4753673A (en) * | 1977-07-22 | 1988-06-28 | The Dow Chemical Company | Trifluoromethyl pyridinyloxyphenoxy and pyridinylthiophenoxy propanoic acids and propanols and derivatives thereof and methods of herbicidal use |
| EP0021453B1 (en) * | 1977-08-12 | 1985-04-10 | Imperial Chemical Industries Plc | 2-chloro-5-trichloromethylpyridine |
| JPS5461182A (en) * | 1977-10-20 | 1979-05-17 | Ishihara Sangyo Kaisha Ltd | 2-phenoxy-5-trifluoromethylpyridine compounds |
| JPS5461183A (en) * | 1977-10-21 | 1979-05-17 | Ishihara Sangyo Kaisha Ltd | 2-substituted-5-trifluoromethyl pyridine compounds |
| EP0003877B1 (en) * | 1978-02-15 | 1988-02-03 | Imperial Chemical Industries Plc | Herbicidal derivatives of 2-(4(2-pyridyloxy)phenoxy)propane, processes for preparing them, and herbicidal compositions containing them |
| JPS55130840U (da) * | 1979-03-12 | 1980-09-16 | ||
| JPS55124763A (en) * | 1979-03-19 | 1980-09-26 | Ishihara Sangyo Kaisha Ltd | 5-trifluoromethyl-2-pyridone derivative |
| GB8333514D0 (en) * | 1983-12-16 | 1984-01-25 | Erba Farmitalia | Tetrahydrothiazolo(5 4-c)pyridine derivatives |
| FR2652085A1 (fr) * | 1989-09-20 | 1991-03-22 | Science Organisation | Nouveau procede de synthese de derives d'oxazolopyridines. |
| DK0937075T3 (da) * | 1996-11-11 | 2004-04-13 | Altana Pharma Ag | Hidtil ukendte imidazo- og oxazolopyridiner som phosphodiesteraseinhibitorer |
| US6232320B1 (en) | 1998-06-04 | 2001-05-15 | Abbott Laboratories | Cell adhesion-inhibiting antiinflammatory compounds |
| JP2002517396A (ja) * | 1998-06-04 | 2002-06-18 | アボット・ラボラトリーズ | 細胞接着阻害抗炎症性化合物 |
| WO2000075145A1 (en) * | 1999-06-03 | 2000-12-14 | Abbott Laboratories | Cell adhesion-inhibiting antiinflammatory compounds |
| AU2002216649A1 (en) * | 2000-10-31 | 2002-05-15 | Lynn Bonham | Benzoxazole lpaat- beta inhibitors and uses thereof |
| US8088928B2 (en) | 2005-08-04 | 2012-01-03 | Sirtris Pharmaceuticals, Inc. | Sirtuin modulating compounds |
| US7855289B2 (en) | 2005-08-04 | 2010-12-21 | Sirtris Pharmaceuticals, Inc. | Sirtuin modulating compounds |
| US8093401B2 (en) | 2005-08-04 | 2012-01-10 | Sirtris Pharmaceuticals, Inc. | Sirtuin modulating compounds |
| WO2007019416A1 (en) | 2005-08-04 | 2007-02-15 | Sirtris Pharmaceuticals, Inc. | Benzimidazole derivatives as sirtuin modulators |
| TW200916472A (en) | 2007-06-20 | 2009-04-16 | Sirtris Pharmaceuticals Inc | Sirtuin modulating compounds |
| NZ591824A (en) * | 2008-08-29 | 2013-07-26 | Treventis Corp | Butyrylcholinesterase ligands as diagnostic tools and treatment for deseases of the nervous system |
| US8343997B2 (en) | 2008-12-19 | 2013-01-01 | Sirtris Pharmaceuticals, Inc. | Thiazolopyridine sirtuin modulating compounds |
| BR112012007237A2 (pt) * | 2009-09-30 | 2019-09-24 | Sumitomo Chemical Co | composição e método para controlar pragas artrópodes |
| CA2812087A1 (en) * | 2010-09-15 | 2012-03-22 | F. Hoffmann-La Roche Ag | Azabenzothiazole compounds, compositions and methods of use |
| MX2013006847A (es) | 2010-12-24 | 2013-07-29 | Sumitomo Chemical Co | Compuesto heterociclico fusionado y su uso para el control de plagas. |
| US20170217941A1 (en) * | 2014-06-25 | 2017-08-03 | Epizyme, Inc. | Substituted benzene and 6,5-fused bicyclic heteroaryl compounds |
| JP2017537909A (ja) | 2014-12-02 | 2017-12-21 | バイエル・クロップサイエンス・アクチェンゲゼルシャフト | 有害生物防除剤としての二環式化合物 本出願は、新規二環式化合物、それら化合物を含んでいる組成物、害虫(animal pest)を防除するためのそれらの使用、並びに、それらを調製するための方法及び中間体に関する。 |
| WO2017127627A1 (en) * | 2016-01-21 | 2017-07-27 | The University Of North Carolina At Chapel Hill | Compounds for treatment of trypanosomes and neurological pathogens and uses thereof |
| CN109790132B (zh) * | 2016-07-07 | 2024-03-05 | 保土谷化学工业株式会社 | 具有苯并唑环结构的化合物及有机电致发光元件 |
-
1973
- 1973-03-12 AR AR248527A patent/AR208500A1/es active
- 1973-05-22 FI FI1657/73A patent/FI57417C/fi active
- 1973-05-24 DK DK284973A patent/DK152050C/da not_active IP Right Cessation
- 1973-05-25 SE SE7307412A patent/SE401675B/xx unknown
- 1973-05-30 NL NLAANVRAGE7307582,A patent/NL184836C/xx not_active IP Right Cessation
- 1973-06-04 ZA ZA00733760A patent/ZA733760B/xx unknown
- 1973-06-04 AU AU56511/73A patent/AU472528B2/en not_active Expired
- 1973-06-05 CA CA173,275A patent/CA1019741A/en not_active Expired
- 1973-06-08 AT AT508673A patent/AT333277B/de active
- 1973-06-11 GB GB2763273A patent/GB1421619A/en not_active Expired
- 1973-06-12 DD DD171559A patent/DD105237A5/xx unknown
- 1973-06-12 CS CS7300004243A patent/CS178889B2/cs unknown
- 1973-06-13 FR FR7321443A patent/FR2187356B1/fr not_active Expired
- 1973-06-13 LU LU67786A patent/LU67786A1/xx unknown
- 1973-06-13 DE DE2330109A patent/DE2330109A1/de not_active Withdrawn
- 1973-06-13 BE BE132231A patent/BE800868A/xx not_active IP Right Cessation
- 1973-06-14 JP JP48066453A patent/JPS5943475B2/ja not_active Expired
-
1974
- 1974-08-26 BE BE147896A patent/BE819177R/xx not_active IP Right Cessation
-
1976
- 1976-04-14 SE SE7604385A patent/SE432767B/xx not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| FI57417C (fi) | 1980-08-11 |
| SE7604385L (sv) | 1976-04-14 |
| SE432767B (sv) | 1984-04-16 |
| AU472528B2 (en) | 1976-05-27 |
| AR208500A1 (es) | 1977-02-15 |
| BE800868A (fr) | 1973-12-13 |
| DK152050C (da) | 1988-07-18 |
| NL184836B (nl) | 1989-06-16 |
| AT333277B (de) | 1976-11-10 |
| NL184836C (nl) | 1989-11-16 |
| NL7307582A (da) | 1973-12-18 |
| CS178889B2 (en) | 1977-10-31 |
| SE401675B (sv) | 1978-05-22 |
| ZA733760B (en) | 1975-01-29 |
| JPS4961195A (da) | 1974-06-13 |
| FI57417B (fi) | 1980-04-30 |
| LU67786A1 (da) | 1973-08-16 |
| FR2187356A1 (da) | 1974-01-18 |
| DE2330109A1 (de) | 1974-01-03 |
| BE819177R (fr) | 1975-02-26 |
| DD105237A5 (da) | 1974-04-12 |
| JPS5943475B2 (ja) | 1984-10-22 |
| AU5651173A (en) | 1974-12-05 |
| FR2187356B1 (da) | 1977-01-28 |
| ATA508673A (de) | 1976-03-15 |
| CA1019741A (en) | 1977-10-25 |
| GB1421619A (en) | 1976-01-21 |
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Legal Events
| Date | Code | Title | Description |
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| PBP | Patent lapsed |