DK176852B1 - 2-Phenyl-substituerede imidazotriazinoner som phosphodiesteraseinhibitorer - Google Patents
2-Phenyl-substituerede imidazotriazinoner som phosphodiesteraseinhibitorer Download PDFInfo
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- DK176852B1 DK176852B1 DK200000766A DKPA200000766A DK176852B1 DK 176852 B1 DK176852 B1 DK 176852B1 DK 200000766 A DK200000766 A DK 200000766A DK PA200000766 A DKPA200000766 A DK PA200000766A DK 176852 B1 DK176852 B1 DK 176852B1
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Classifications
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- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/53—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with three nitrogens as the only ring hetero atoms, e.g. chlorazanil, melamine
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- C—CHEMISTRY; METALLURGY
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- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
- C07F9/02—Phosphorus compounds
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- C07F9/6561—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom containing systems of two or more relevant hetero rings condensed among themselves or condensed with a common carbocyclic ring or ring system, with or without other non-condensed hetero rings
Landscapes
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
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Description
DK 176852 B1
Den foreliggende opfindelse angår 2-phenyl-substituerede imidazotriazinoner, en fremgangsmåde til deres fremstilling samt deres anvendelse som lægemidler, især som inhibitorer af cGMP-metaboliserende phosphodiesteraser.
5 I tysk offentliggørelsesskrift nr. 2.811.780 omtales imidazotriaziner som bronchodilato-rer med spasmolytisk virkning og hæmmende virkning mod cyclisk adenosinmono-phosphat metaboliserende phosphodiesteraser (cAMP-PDE’er, nomenklatur ifølge Beavo: PDE-III og PDE-IV). En hæmmende virkning mod cyclisk guanosinmo-nophosphat metaboliserende phosphodiesteraser (cGMP-PDE'er, nomenklatur ifølge 10 Beavo og Reifsnyder (Trends in Pharmacol. Sci. H, 150-155, 1990) PDE-I, PDE-II og PDE-V) er ikke omtalt. Der omtales ingen forbindelser, som indeholder en sulfonamid-gruppe i arylgruppen i 2-stillingen. Endvidere er der i fransk patentskrift nr. 2.213.058, schweizisk patentskrift nr. 594.671, de tyske offentliggørelsesskrifter nr. 2.255.172 og 2.364.076 og europæisk offentliggørelsesskrift nr. 9.384 omtalt imidazotriazinoner, der 15 ikke har nogen substitueret arylgruppe i 2-stillingen, og ligeledes omtales som bron-chodilatorer med cAMP-PDE-inhiberende virkning.
I WO-skrift nr. 94/28902 omtales pyrazolopyrimidinoner, der er egnede til behanding af impotens.
20
Forbindelserne ifølge opfindelsen er stærke inhibitorer af enten en eller flere af de cyclisk guanosin-3’,5'-monophosphat metaboliserende phosphodiesteraser (cGMP-PDE’er). I overensstemmelse med nomenklaturen ifølge Beavo og Reifsnyder (Trends in Pharmacol. Sci. JM, 150-155, 1990) drejer det sig om phosphodiesterase-25 isoenzymeme PDE-I, PDE-II og PDE-V.
En stigning i cGMP-koncentrationen kan føre til gavnlige, antiaggregatoriske, anti-thrombotiske, antiproliferative, antivasospastiske, vasodilaterende, natriuretiske og diuretiske virkninger. Den kan påvirke kort- eller langtidsmodulationen af den vaskulæ-30 re og cardiale inotropi, hjerterytmen og den cardiale stimulationsledning (J.C. Stoclet, T. Keravis, N. Komas og C. Kugnier, Exp. Opin. Invest. Drugs (1995), 4 (11), 1081-1100).
Den foreliggende opfindelse angår de i tabel A anførte forbindelser 35 2 DK 176852 B1
Tabel A
“T I /CH’ H3C""^0
ij N' V
i CH, ?02 0
N
ch3 "Π’Λ? (ij N vi so2 Ha I 2 o I ό . i 3 DK 176852 B1 ΗΝ^γ{ 1 (j N'v! SO, Ha 6
Y
(CH2)2-OH
“ 1 /CH3 H3C^0 HN'
AA
i ch3 f°2 ΰ
Y
C2H5 I "ΡΛ n^O ΗΝ'^'γΛ ΛΛ< I CH, SO, 3 I 2 ΰ
Y
ch3 4 DK 176852 B1
«.C-» XT
jW( o 1 f"3 HN'Ay==\ jW/ SCL H* £ _ X /CH 3 T CH, fo2 Λ CH3 ch3 5 DK 176852 B1 F7^ H3C*^0 , cM, .
T CH, SO- 3 i 2 rNv) c2h5 ch2-oh 10 - samt deres salte. Inden for opfindelsens rammer foretrækkes fysiologisk acceptable salte.
Fysiologisk acceptable salte kan være salte af forbindelserne ifølge opfindelsen med 15 uorganiske eller organiske syrer. Især foretrækkes salte med uorganiske syrer, f.eks. saltsyre, hydrogenbromidsyre, phosphorsyre eller svovlsyre, eller salte med organiske carboxyl- eller sulfonsyrer, f.eks. eddikesyre, maleinsyre, fumarsyre, æblesyre, citronsyre, vinsyre, mælkesyre, benzoesyre, methansulfonsyre, ethansulfonsyre, phenylsul-fonsyre, toluensulfonsyre eller naphthalendisulfonsyre.
20
Fysiologisk acceptable salte kan ligeledes være metal- eller ammoniumsalte af forbindelserne ifølge opfindelsen. Især foretrækkes eksempelvis natrium-, kalium-, magnesium- eller calciumsalte samt ammoniumsalte, der er afledt af ammoniak eller organiske aminer, f.eks. ethylamin, di- eller triethylamin, di- eller triethanolamin, dicyclohexyl-25 amin, dimethylaminoethanol, arginin, lysin, ethylendiamin eller 2-phenylethylamin.
Forbindelserne ifølge opfindelsen, især saltene, kan også foreligge som hydrater. Inden for opfindelsens rammer forstås ved hydrater sådanne forbindelser, som indeholder krystalvand. Sådanne forbindelser kan indeholde et eller flere, typisk 1 til 5, ækvi-30 valenter vand. Hydrater kan eksempelvis fremstilles ved, at den pågældende forbindelse krystalliseres fra vand eller fra et vandholdigt opløsningsmiddel.
Salte eller hydrater ifølge opfindelsen er eksempelvis følgende forbindelser: 6 β DK 176852 B1
Tabel B Struktur j? CHj ! ^ CHj SOj I 2 >N< r η x HCl ΤΓ t
CZHS
9 CHX.
HiC '0 HW'^V^N
CHj SO, I 3 Γ ^ +2xHGl c2h5· 9 ch3
H3C^O
ΜΗ 0=1=0: ^Hy C +J cf X 3 H,0
nC
. J H
*Φ DK 176852 B1 7
Forbindelserne ifølge opfindelsen kan findes i stereoisomere former, der enten forholder sig som billede og spejlbillede (enantiomere), eller som ikke forholder sig som billede og spejlbillede (diastereomere). Opfindelsen angår både de enantiomere eller diastereomere og deres blandinger. De racemiske former kan ligesom de diastereo-5 mere på kendt måde spaltes i stereoisomert ensartede bestanddele.
Opfindelsen angår desuden en fremgangsmåde til fremstilling af forbindelserne ifølge opfindelsen, som er ejendommelig ved, at man
10 først omsætter forbindelserne med den almene formel II
o R1 o ΛΥ- -
15 O
i hvilken R1 betyder methyl eller ethyl, R2 3 betyder propyl, og L betyder ligekædet eller forgrenet alkyl med indtil 4 carbonatomer,
20 med forbindelser med den almene formel III
R5 NH
1 L (lll) 25 (ίι^ΝΗ
x HCI
35 hvilken R5 betyder en ethoxygruppe, 2 i en totrinsreaktion i systemerne ethanol og phosphoroxytrichlorid/dichlorethan til for- 3
30 bindeiserne med den almene formel IV
DK 176852 B1 8 O Ri c5rv i hvilken R1, R2 og R5 har de ovenfor angivne betydninger, 10
i et videre trin omsætter med chlorsulfonsyre til forbindelserne med den almene formel V
O ^ 15 R5 I l ΰ /,N (Ό
S02CI
20 i hvilken R1, R2 og R5 har de ovenfor angivne betydninger, og endelig omsætter med de pågældende aminer i indifferente opløsningsmidler.
25 Fremgangsmåden ifølge opfindelsen kan illustreres ved følgende reaktionsskema som eksempel: 9 DK 176852 B1 NH.
C2H5^n » ’ O CH, O 9 *~ΥΛ u1" - CH« 1. Ethanol , f 2. Phosphoroxytrichlorid / Dichlorethan 0 ru "fV»' (J N" OH=
Chlorsulfonsyre «V-c, ™Kt sop / \ HN N-CH,
I V-/ J
ϋ /CHl C-H-0 hA^
1 I I ,N
(Τ^Ιλ I / \ SOrN^!-CH5 DK 176852 B1 10
Som opløsningsmidler til de enkelte trin er de gængse organiske opløsningsmidler, der ikke forandres under reaktionsbetingelserne, egnede. Hertil hører fortrinsvis ethere, f.eks. diethylether, droxan, tetrahydrofuran eller glycoldimethylether, carbonhydrider, f.eks. benzen, toluen, xylen, hexan, cyclohexan eller mineraloliefraktioner, halogencar-5 bonhydrider, f.eks. methylenchlorid, chloroform, carbontetrachlorid, dichlorethan, tri-chlorethylen eller chlorbenzen, eller ethylacetat, dimethylformamid, hexa-methylphosphorsyretriamid, acetonitril, acetone, dimethoxyethan eller pyridin. Det er ligeledes muligt at anvende blandinger af de nævnte opløsningsmidler. Især foretrækkes ethanol til første trin og dichlorethan til andet trin.
10
Reaktionstemperaturen kan generelt varieres inden for et større område. Sædvanligvis arbejder man i et område fra -20 til 20Q°C, fortrinsvis fra 0 til 70°C.
Fremgangsmådetrinnene ifølge opfindelsen gennemføres sædvanligvis under normalt 15 tryk. Det er dog også muligt at udføre dem ved overtryk eller ved undertryk (f.eks. i et område fra 0,5 til 5 bar).
Omsætningen til forbindelserne med den almene formel V sker i et temperaturinterval fra 0°C til stuetemperatur og normalt tryk.
20
Omsætningen med de pågældende aminer sker i et af de ovenfor anførte chlorerede carbonhydrider, fortrinsvis i methylenchlorid.
Reaktionstemperaturen kan generelt varieres inden for et større område. Sædvanligvis 25 arbejder man i et område fra -20 til 200°C, fortrinsvis fra 0°C til stuetemperatur.
Fremgangsmådetrinnene ifølge opfindelsen gennemføres sædvanligvis under normalt tryk. Det er dog også muligt at udføre dem ved overtryk eller ved undertryk (f.eks. i et område fra 0,5 til 5 bar).
30
Forbindelserne med den almene formel II er til dels kendte eller nye og kan da fremstilles ved, at man først omsætter forbindelser med den almene formel VII
R2-CO-T (VII) 35 11 DK 176852 B1 i hvilken R2 har den ovenfor angivne betydning, og T betyder halogen, fortrinsvis chlor,
5 med forbindelser med den almene formel VIII
f H02C'^S'NH2 (VII,) 10 i hvilken R1 har den ovenfor angivne betydning, i indifferente opløsningsmidler, eventuelt i nærvær af en base og trimethylsilylchlorid,
15 til forbindelserne med den almene formel IX
9’ I c*)
R-CO-NH COjH
20 i hvilken R1 og R2 har de ovenfor angivne betydninger, og derefter omsætter med forbindelsen med formlen X 25
O
X (X)
CI'XOjL
30 hvori L har den ovenfor angivne betydning, i indifferente opløsningsmidler, eventuelt i nærvær af en base.
Som opløsningsmidler til de enkelte trin er de gængse organiske opløsningsmidler, der ikke forandres under reaktionsbetingelseme, egnede. Hertil hører fortrinsvis ethere, 35 f.eks. diethylether, dioxan, tetrahydrofuran eller glycoldimethylether, carbonhydrider, 12 DK 176852 B1 f.eks. benzen, toluen, xylen, hexan, cyclohexan eller mineraloliefraktioner, halogencar-bonhydrider, f.eks, methylenchlorid, chloroform, carbontetrachlorid, dichlorethylen, tri-chlorethylen eller chlorbenzen, eller ethylacetat, dimethylformamid, hexa-methylphosphorsyretriamid, acetonitril, acetone, dimethoxyethan eller pyridin. Det er 5 ligeledes muligt at anvende blandinger af de nævnte opløsningsmidler. Især foretrækkes methylenchlorid til det første trin og en blanding af tetrahydrofuran og pyridin til det andet trin.
Som baser egner sig generelt alkalimetalhydrider eller -alkoholater, f.eks. natriumhy-10 drid eller kalium-tert.butanolat, eller cycliske aminer, f.eks. piperidin, pyridin, dimethyl-aminomorpholin eller Ci-C4-alkylaminer, f.eks. triethylamin. Især foretrækkes triethyl-amin, pyridin og/eller dimethylaminopyridin.
Basen anvendes sædvanligvis i en mængde på 1 til 4 mol, fortrinsvis 1,2 til 3 mol pr.
15 mol forbindelse med formlen X.
Reaktionstemperaturen kan generelt varieres inden for et større område. Sædvanligvis arbejder man inden for et område fra -20 til 200°C, fortrinsvis fra 0 til 100"C.
20 Forbindelserne med de almene formler VII, VIII, IX og X er i og for sig kendte eller kan fremstilles efter gængse metoder.
Forbindelserne med den almene formel III kan fremstilles ved, at man omsætter forbindelser med den almene formel XI
25 5- <xi) 30 i hvilken R5 har den ovenfor angivne betydning, med ammoniumchlorid i toluen og i nærvær af trimethylaluminium i hexan i et temperaturinterval fra -20°C til stuetemperatur, fortrinsvis ved 0°C og normalt tryk, og omsæt-35 ter den fremkomne amidin med hydrazinhydrat, eventuelt in situ.
13 DK 176852 B1
Forbindelserne med den almene formel XI er i og for sig kendte eller kan fremstilles efter gængse metoder.
5 Forbindelserne med den almene formel IV er til dels kendte eller nye og kan fremstilles efter kendte metoder fjf. Davis R. Marshall, Chemistry and Industry, 2. maj 1983, 331-335],
Forbindelserne med den almene formel V er i og for sig nye, men kan fremstilles ud fra 10 forbindelserne med den almene formel IV efter skriftet Organikum, VEB Deutscher Verlag der Wissenschaften, Berlin 1974, side 338-339.
Forbindelserne ifølge opfindelsen udviser et ikke forudsigeligt, værdifuldt farmakologisk virkningsspektrum.
15
De inhiberer enten en eller flere af de c-GMP metaboliserende phosphodiesteraser (PDE I, PDE II og PDE V). Dette fører til en stigning i c-GMP. Den differentierede ekspression af phosphodiesteraserne i forskellige celler, væv og organer muliggør ligesom den differentierede subcellulære lokalisering af disse enzymer i forbindelse med 20 de selektive inhibitorer ifølge opfindelsen selektiv adressering af forskellige cGMP regulerede processer.
Desuden forstærker forbindelserne ifølge opfindelsen virkningen af stoffer som f.eks.
EDRF (Endothelium derived relaxing factor), ANP (atrial natriuretic peptide), af nitrova-25 sodilatorer og alle andre stoffer, der forøger cGMP-koncentrationen på en anden måde end phosphodiesteraseinhibitorer.
De kan derfor anvendes i lægemidler til behandling af hjertekarsygdomme som f.eks. behandling af forhøjet blodtryk, neuronal hypertoni, stabil og instabil angina, perifere 30 og cardiale karsygdomme, af arrhytmier, til behandling af thromboemboliske sygdomme og iskæmier, såsom hjertemuskelinfarkt, slagtilfælde, transitoriske og iskæmiske anfald, angina pectoris, perifere gennemblødningsforstyrrelser, forhindring af restenoser efter thrombolyseterapi, perkutan transluminal angioplasti (PTA), perkutane transluminale coronarangioplastier (PTCA) og bypass. Endvidere kan de også have 35 betydning for cerebrovaskulære sygdomme. Den relakserende virkning på glat musku- DK 176852 B1 14 latur gør dem egnede til behandling af sygdomme i urogenitalsystemet, såsom prosta-tahypertrofi, inkontinens samt især til behandling af erektionssvigt og hunlig seksuel funktionssvigt.
5 Aktivitet af ohosohodiesteraserne (PDE'erne)
Den c-GMP stimulerbare PDE II, den c-GMP hæmbare PDE III og den cAMP-specifikke PDE IV isoleredes enten fra svine- eller oksehjertemuskel. Den Ca2t-calmodulin-stimulerbare PDE I isoleredes fra svineaorta, svinehjeme eller især fra ok-10 seaorta. Den c-GMP-specifikke PDE V udvandtes af svinetyndtarm, svineaorta, humane blodplader og fortrinsvis af okseaorta. Rensningen skete ved anionbytterchromato-grafi på MonoQR Pharmacia, i det væsentlige efter metoden ifølge M. Hoey og Miles D. Houslay, Biochemical Pharmacology, 40, 193-202 (1990) og C. Lugman m.fl. Biochemical Pharmacology, 35, 1743-1751 (1986), 15
Bestemmelsen af enzymaktiviteten sker i en forsøgsblanding på 100 pi i 20 mM tris-HCI-puffer pH 7,5, der indeholder 5 mM MgCI2, 0,1 mg/ml okseserumalbumin og enten 800 Bq 3HcAMP eller 3HcGMP. Slutkoncentrationen af de tilsvarende nucleotider er 10-6 mol/l. Reaktionen startes ved tilsætning af enzymet, og enzymmængden afpas-20 ses således, at der under inkubationstiden på 30 minutter omsættes ca. 50% af substratet. For at undersøge den cGMP stimulerbare PDE II anvendes 3HcAMP som substrat, og der sættes 1Q'6 mol/l umærket cGMP til blandingen. For at undersøge den Ca2+-caImodulinafhængige PDE I sættes yderligere 1 μΜ CaCI2 og 0,1 μΜ calmodulin til reaktionsblandingen. Reaktionen standses ved tilsætning af 100 μΙ acetonitril, der 25 indeholder 1 mM cAMP og 1 mM AMP. 100 μΙ af reaktionsblandingen adskilles på HPLC, og spaltningsprodukterne bestemmes kvantitativt “online” med en gennem-strømningsscintiilationstæller. Den stofkoncentration måles, ved hvilken reaktionshastigheden er nedsat 50%. Desuden anvendtes til undersøgelsen “Phosphodiesterase [3H] cAMP-SPA enzyme assay” og “Phosphodiesterase [3H] cGMP-SPA enzyme as-30 say” fra firmaet Amersham Life Science. Forsøget gennemførtes efter den af producenten angivne forsøgsprotokol. Til aktivitetsbestemmelsen af PDE II anvendtes [3H] cAMP SPA assay, idet der sattes 106 M cGMP til reaktionsblandingen til aktivering af enzymet. Til målingen af PDEI sattes 10'7 M calmodulin og 1 μΜ CaCI2 til reaktionsblandingen. PDEV måltes med [3H] cGMP SPA assay.
35 15 DK 176852 B1
Inhiberinq af phosphodiesteraser in vitro Tabel 1
Eks. nr. PDEI PDEII PDEV
IC50 [nM] IC50 [nM] Ϊ 300 >1000 2 2 200 >1000 2 3 Ϊ00 >1000 Ϊ ~~4 200 >1000 3 - >1000 4 6 800 >1000 4 8 300 >1000 10 9 50 >1000 3 5
Fremstillinqseksempler
Principielt fører inhibering af en eller flere phosphodiesteraser af denne type til forøgelse af cGMP-koncentrationen. Derved er forbindelserne interessante for alle tera-10 pier, ved hvilke en forøgelse af cGMP-koncentrationen kan anses som gavnlig.
Undersøgelsen af de cardiovaskulære virkninger gennemførtes på SH-rotter og hunde. Stofferne blev indgivet intravenøst eller oralt.
15 Undersøgelsen af den erektionsudløsende virkning gennemførtes på vågne kaniner (H. Naganuma, T. Egashira og J. Fuji, Clinical and Experimental Pharmacology and Physiology 20,177-183 (1993)]. Stofferne blev indgivet intravenøst, oralt eller parente-ralt.
20 De nye aktive stoffer samt deres fysiologisk acceptable salte (f.eks. hydrochlorider, maleinater eller lactater) kan på kendt måde omdannes til de gængse præparatformer, såsom tabletter, drageer, piller, granulater, aerosoler, sirupper, emulsioner, suspensioner og opløsninger, under anvendelse af indifferente, ikke toksiske, farmaceutisk egnede bærestoffer eller opløsningsmidler. Herved bør den terapeutisk aktive forbindelse 25 i hvert tilfælde være til stede i en koncentration fra ca. 0,5 til 90 vægt% af den samlede DK 176852 B1 16 blanding, dvs. i mængder, der er tilstrækkelige til at opnå det angivne doseringsspillerum.
Præparaterne fremstilles eksempelvis ved forstrækning af de aktive stoffer med opløs-5 ningsmidler og/eller bærestoffer, eventuelt under anvendelse af emulgeringsmidler og/eller dispergeringsmidler, idet der eksempelvis i tilfælde af anvendelse af vand som fortyndingsmiddel eventuelt kan anvendes organiske opløsningsmidler som hjælpeopløsningsmidler.
10 indgivelsen sker på gængs måde, fortrinsvis oralt eller parenteralt, f.eks. perlingualt, buccalt, intravenøst, nasalt, rektalt eller ved inhalation.
Til anvendelse ved mennesker indgives oralt hensigtsmæssigt doseringer fra 0,001 til 50 mg/kg, fortrinsvis 0,01 til 20 mg/kg. Ved parenteral indgivelse, f.eks. over slimhin-15 der nasalt, buccalt eller ved inhalation, er en dosering fra 0,001 til 0,5 mg/kg hensigtsmæssig.
Alligevel kan det eventuelt være nødvendigt at afvige fra de nævnte mængder, nemlig afhængigt af legemsvægten eller indgivelsesvejen, af den individuelle reaktion på me-20 dikamentet, arten af dets præparat og det tidspunkt eller interval, til hvilket indgivelsen sker. Således kan det i nogle tilfælde være tilstrækkeligt at klare sig med mindre end den ovennævnte mindste mængde, medens den nævnte øvre grænse i andre tilfælde må overskrides. I tilfælde af indgivelse af større mængder kan det være anbefalelses-værdigt at fordele disse i flere enkeltindgivelser i løbet af dagen.
25
Forbindelserne ifølge opfindelsen er også egnede til anvendelse i veterinærmedicinen.
Til anvendelser i veterinærmedicinen kan forbindelserne eller deres ikke-toksiske salte indgives i et egnet præparat i overensstemmelse med almen veterinærmedicinsk praksis. Dyrlægen kan fastlægge indgivelsesmåden og doseringen efter arten af det dyr, 30 der skal behandles.
35 DK 176852 B1 17
Udaanasforbindelser Eksempel 1A
5 2-Butyrylaminopropionsyre ch3 "Xr ίο 1 22,27 g (250 mmol) D,L-alanin og 55,66 g (550 mmol) triethylamin opløses i 250 ml methylenchlorid, og opløsningen afkøles til 0°C. 59,75 g (550 mmol) trimethylsilylchlo-15 rid tildryppes, og opløsningen omrøres i 1 time ved stuetemperatur og 1 time ved 40°C. Efter afkøling til -10°C tildryppes 26,64 g (250 mmol) butyrylchlorid, og den fremkomne blanding omrøres i 2 timer ved -10°C og 1 time ved stuetemperatur.
Under isafkøling tildryppes 125 ml vand, og reaktionsblandingen omrøres i 15 minutter 20 ved stuetemperatur. Den vandige fase inddampes til tørhed, remanensen udrives med acetone, og moderluden frasuges. Efter fjernelse af opløsningsmidlet chromatografe-res remanensen. Det fremkomne produkt opløses i 3 N natriumhydroxidopløsning, og den fremkomne opløsning inddampes til tørhed. Den optages i koncentreret saltsyre og inddampes atter til tørhed. Den udrøres med acetone, udfældet fast stof suges fra, 25 og opløsningsmidlet fjernes i vakuum. Herved fås 28,2 g (71%) af en sej olie, der krystalliserer efter nogen tid.
200 MHz 1H-NMR (DMSO-d6): 0,84, t, 3H; 1,22, d, 3H; 1,50, hex, 2H; 2,07, t, 2H; 4,20, quin., 1H, 8,09, d, 1H.
30 35 18 DK 176852 B1
Eksempel 2A 2-ethoxybenzonitril CH- ér*' 10 25 g (210 mmol) 2-hydroxybenzonitril tilbagesvales natten over i 500 ml acetone med 87 g kaliumcarbonat og 34,3 g (314,8 mmol) ethylbromid. Det faste stof filtreres fra, opløsningsmidlet fjernes i vakuum, og remanensen destilleres i vakuum. Herved fås 30,0 g (97%) af en farveløs væske.
15 200 MHz 1H-NMR (DMSO-d6): 1,48, t, 3H; 4,15, quart., 2H; 6,99, dt, 2H; 7,51, dt, 2H.
Eksempel 3A
20 2-Ethoxybenzamidinhydrochlorid ch3
cr NH CIH
llJ’NH, 21,4 g (400 mmol) ammoniumchlorid suspenderes i 375 ml toluen, og suspensionen afkøles til 0°C. 200 ml 2 M opløsning af trimethylaluminium i hexan tildryppes, og blan-30 dingen omrøres ved stuetemperatur indtil ophør af gasudviklingen. Efter tilsætning af 29,44 g (200 mmol) 2-ethoxybenzonitril omrøres blandingen natten over ved 80°C (bad).
Den afkølede reaktionsblanding sættes under isafkøling til en suspension af 100 g 35 kiselgel og 950 ml chloroform, og blandingen omrøres i 30 minutter ved stuetempera- 19 DK 176852 B1 tur. Den frasuges og vaskes efter med samme mængde methanol. Moderluden inddampes, den fremkomne remanens udrøres med en blanding af methylenchlorid og methanol (9:1), det faste stof frasuges, og moderluden inddampes. Herved fås 30,4 g (76%) farveløst fast stof.
5 200 MHz 1H-NMR (DMSO-d6): 1,36, t, 3H; 4,12, quart., 2H; 7,10, t, 1H; 7,21, d, 1H; 7,52, m, 2H; 9,30, s, bred, 4H.
Eksempel 4A
10 2-(2-Ethoxy-phenyl)-5-methyl-7-propyl-3H-imidazo[5,1 -f][1,2,4]triazin-4-on CH, O pu J 1 / 3 O^HN''Ts\t
15 1 1 A //N
CM
CH, 20 7,16 g (45 mmol) 2-buryrylamino-propionsyre opløses i 45 ml THF med 10,67 g pyridin og opvarmes til tilbagesvaling efter tilsætning af en spatelspids DMAP. 12,29 g (90 mol) oxalsyre-ethylesterchlorid tildryppes langsomt, og reaktionsblandingen tilbagesvales i 3 timer. Den udhældes på isvand, ekstraheres tre gange med ethylacetat, tørres 25 med natriumsulfat og inddampes på rotationsfordamper Remanensen optages i 15 ml ethanol og tilbagesvales i 2,5 timer med 2,15 g natriumhydrogencarbonat. Den afkølede opløsning filtreres.
Til en opløsning af 9,03 g (45 mmol) 2-ethoxybenzamidinhydrochlorid i 45 ml ethanol 30 dryppes under isafkøling 2,25 g (45 mmol) hydrazinhydrat, og den fremkomne suspension omrøres endnu 10 minutter ved stuetemperatur. Til denne reaktionsblanding sættes den ovenfor beskrevne ethanoliske opløsning, og blandingen omrøres i 4 timer ved en badtemperatur på 70°C. Efter filtrering inddampes, remanensen fordeles mellem methylenchlorid og vand, den organiske fase tørres med natriumsulfat, og opløs-35 ningsmidlet fjernes i vakuum.
DK 176852 B1 20
Denne remanens opløses i 60 ml 1,2-dichlorethan og tilbagesvales i 2 timer efter tilsætning af 7,5 ml phosphoroxychlorid. Den fortyndes med methylenchlorid og neutraliseres ved tilsætning af natriumhydrogencarbonatopløsning og fast natriumhydrogen-5 carbonat. Den organiske fase tørres, og opløsningsmidlet fjernes i vakuum. Chroma-tografi med ethylacetat og krystallisation giver 4,00 g (28%) farveløst fast stof, Rf = 0,42 (methylenchlorid/methanol = 95:5).
200 MHz 1H-NMR (CDCI3): 1,02, t, 3H; 1,56, t, 3H; 1,89, hex, 2H; 2,67, s, 3H; 3,00, t, 10 2H; 4,26, quart., 2H; 7,05, m, 2H; 7,50, dt, 1H; 8,17, dd, 1H; 10,00, s, 1H.
Eksempel 5A
4-Ethoxy-3-(5-methyl-4-oxo-7-propyl-3,4-dihydro-imidazo[5,1 -f][1,2,4]triazin-2-15 yl)benzensulfonsyrechlorid
jHl X
so2ct ch3 25 2,00 g (6,4 mmol) 2-(2-ethoxy-phenyl)-5-methyl-7-propyl-3H-imidazo[5,1 -f][1,2,4]- triazin-4-on sættes langsomt til 3,83 ml chlorsulfonsyre ved 0°C. Reaktionsblandingen omrøres natten over ved stuetemperatur, hældes på isvand og ekstraheres med methylenchlorid. Herved fås 2,40 g (91%) farveløst skum.
30 200 MHz 1H-NMR (CDCIS): 1,03, t, 3H; 1,61, t, 2H; 1,92, hex, 2H; 2,67, s, 3H; 3,10, t, 2H; 4,42, quart., 2H; 7,27, t, 1H; 8,20, dd, 1H; 8,67, d, 1H; 10,18, s, 1H.
35
Eksempel 6A
21 DK 176852 B1 (4-Piperidinylmethyl)-phosphonsyrediethylester 5 r oc2h5 φ
ίο H
2,11 g (528 mmol) 60%'s natriumhydrid anbringes i 50 ml absolut tetrahydrofuran, og 15,7 g (52,8 mmol) methandiphosphonsyrediethylester tildryppes. Der omrøres endnu 30 minutter ved stuetemperatur, og derpå tildryppes 10,1 g (52,8 mmol) 1-benzyl-4-piperidon. Der omrøres i 1 time ved stuetemperatur og 1 time under tilbagesvaling, 15 inddampes, tilsættes vand, ekstraheres tre gange med methylenchlorid, tørres med natriumsulfat og inddampes. Remanensen hydrogeneres i 50 ml ethanol på 1,7 g 10%’s palladium/aktivt kul ved stuetemperatur og 3 bar. Katalysatoren frasuges, og filtratet inddampes. Udbytte: 12,5 g (100% af teorien).
20 400 MHz, ’H-NMR (CDCI3): 1,13, m, 2H; 1,32, t, 6H; 1,69, dd, 2H; 1,74-1,95, m, 4H; 2,62, dt, 2H; 3,05, m, 2H; 4,1, m, 4H.
25 30 35 DK 176852 B1 22
Fremstillinqseksempler Eksempel 1 5 2-[2-Ethoxy-5-(4-methyl-piperazin-1-sulfonyl)-phenyl]-5-methyl-7-propyl-3H-imtdazo[5,1-f][1,2,4]triazin-4-on Λ i Τ'
H3C^O
AAA/ T <, o=s=o ch3 6
V
ch3 1,23 g (3 mmol) 4-ethoxy-3-(5-methyl-4-oxo-7-propyl-3,4-dihydro-imidazo[5,1-f][1,2,4]-triazin-2-yl)-benzensulfonsyrechlorid opløses i 40 ml methylenchlorid og afkøles til 0°C.
20 Efter tilsætning af en spatelspids DMAP tilsættes 0,90 g (9,00 mol) N-methylpiperazin, og reaktionsblandingen omrøres natten over ved stuetemperatur. Den fortyndes med methylenchlorid, den organiske fase vaskes to gange med vand og tørres med natriumsulfat, og opløsningsmidlet fjernes i vakuum. Krystallisation fra ether giver 1,25 g (88%) farveløst fast stof.
25 200 MHz 1H-NMR (CDC!3): 1,01, t, 3H; 1,59, t, 3H; 1,88, hex, 2H; 2,29, s, 3H; 2,51, m, 4H; 2,63, s, 3H; 3,00, t, 2H; 3,08, m, 4H; 4,33, quart., 2H, 7,17, d, 1H; 7,88, dd, 1H; 8,44, d, 1H; 9,75, s, 1H.
30 35
Eksempel 2 DK 176852 B1 23 2-[2-Ethoxy-5-(4-ethyl-piperazin-1-sulfonyl)-phenyl]-5-methyl-7-propyl-3H-imidazo-,2,4]triazin-4-on Q CHa 5 h3c-^o ηνΛ^ν ςτ·^ 10 o=s=o CH3 ό
N
15 H3C^ 470 mg (1,14 mmol) 4-ethoxy-3-(5-methyl-4-oxo-7-propyl^,4-dihydro-imidazo[5,1-f]-[1,2,4]triazin-2-yl)-benzensulfonsyrechlorid opløses i 20 ml methylenchlorid og afkøles til 0°C, Der tilsættes 390 mg (3,42 mmol) N-ethylpiperazin, og reaktionsblandingen om røres natten over ved stuetemperatur. Den fortyndes med methylenchlorid, den 20 organiske fase vaskes to gange med vand og tørres med natriumsulfat, og opløsningsmidlet fjernes i vakuum. Krystallisation fra ether giver 370 mg (66%) farveløst fast stof.
400 MHz ’H-NMR (CDCl3): 1,01, t, 3H; 1,59, t, 3H; 1,88, hex, 2H; 2,42, quart., 2H; 25 2,56, m, 4H; 2,63, s, 3H; 3,00, t, 2H; 3,10, m, 4H; 4,33, quart., 2H, 7,17, d, 1H; 7,88, dd, 1H; 8,44, d, 1H; 9,75, s, 1H.
30 35
Eksempel 3 DK 176852 B1 24 2-[2-Είήοχγ-5-(4-ήν^οχγ-ριρθπάίη-1-8υΙίοηγΙ)-ρΐΊθηγΙ]-5-ιτΐθ1ΐιγΙ~7'ρΓορνΙ~3Η-Ιη,Ήϋ-azo[5,1-f][1,2,4]triaztn-4-on * 5 ^ 1 τ ΗΧ Ο 0 = s=0 CH, Φ
15 OH
På tilsvarende måde fås ud fra 531 mg (1,29 mmol) 4-ethoxy-3-(5-methyl-4-oxo-7-propyl-3,4-dihydro-imidazo[5,1-f][1,2,4]triazin-2-yl)benzensulfonsyrechlorid og 393 mg (3,88 mmol) 4-hydroxypiperidin 400 mg (64%) 2-[2-ethoxy-5-(4-hydroxy-piperidin-1-sulfonyl)-phenyl]-5-methyl-7-propyl-3H-imidazo[5,1-f][1,2,4]triazin-4-on.
20 200 MHz 1H-NMR (DMSO-d6): 0,941, t, 3H; 1,32, t, 3H; 1,45, m, 2H; 1,71, m, 4H; 2,48, s, 3H; 2,82, m, 4H; 3,11, m, 2H; 3,55, m, 1H; 4,20, quart., 2H; 4,72, d, 1H, 7,39, d, 1H; 7,87, m, 2H; 11,70, s, 1H.
25 30 35
Eksempel 4 DK 176852 B1 25 2-[2-Ethoxy-5-[4-(2-hydroxy-ethyl)-piperazin-1-sulfonyl]-phenyl}-5-methyl-7-propyl-3H- imidazo[5,1 -f][1,2,4]triazin-4-on 5 ^ 1 J“‘ Η·° ? TYv,
. W
O-S-O CHg φ / På tilsvarende måde fås ud fra 411 mg (1 mmol) 4-ethoxy-3-{5-methyl-4-oxo-7-propyl- 3,4-dihydro-imidazo[5,1-f][1,2,4]triazin-2-yl)-benzensulfonsyrechlorid og 391 mg (3 20 mmol) 4-hydroxyethylpiperazin 380 mg (75%) 2-{2-ethoxy-5'[4-(2-hydroxy-ethyl)-pipe-razin-1-sulfonyl]-phenyl}-5-methyl-7-propyl-3H-imidazo[5,1-f][1,2,4]triazin-4-on. Rf = 0,198 (methylenchlorid/methanol = 95:5) 200 MHz 1H-NMR (CDCI3): 1,02, t, 3H; 1,61, t, 3H; 1,87, hex., 3H; 2,60, m, 7H; 3,00, t, 25 2H; 3,10, m, 4H; 3,60, t, 2H; 4,36, quart., 2H; 7,18, d, 1H, 7,89, dd, 1H, 8,47, d, 1H, 9,71, s, 1H.
30 35
Eksempel 5 DK 176852 B1 26 N,N-Diethyl-4-ethoxy-3-(5-methyl-4-oxo-7-propyl-3,4-dihydro-imidazo[5,1- i, d][1,2,4]triazin-2-yl)benzensulfonamid q 5 Ϊ
HX^O
10 0=S=0 CH.
i, 3 Λ ch3 CH3 På tilsvarende måde fås ud fra 400 mg {0,97 mmol) 4-ethoxy“3-(5-methyl-4-oxo-7-15 propyl-3,4-dihydro-imidazo[5,1-f][1,2,4]triazin-2-yl)-benzensulfonsyrechlond og 210 mg (2,92 mmol) diethylamin 398 mg (89%) N,N-diethyl-4-ethoxy-3-(5-methyl-4-oxo-7-propyl-3,4-dihydro-imidazo[5,1-f][1,2,4]triazin-2-yl)benzensulfonamid. Rf = 0,49 (methy-lenchlorid/methanol = 20:1) 20 200 MHz 1H-NMR (CDCI3): 1,02, t, 3H; 1,20, t, 6H; 1,49, t, 1,61, t, 3H; 1,88, sex., 2H; 2,30, s, bred, 1H; 2,62, s, 3H; 2,99, t, 2H; 3,32, m, 4H; 3,78, t, 2H; 3,80, m, 2H; 4,37, quart., 2H; 7,15, d, 1H; 7,98, dd, 1H; 8,56, d, 1H; 9,70, s, 1H.
25 30 35 27
Eksempel 6 DK 176852 B1 2-[2-Ethoxy-5-(4-methylpiperazin-1-sulfonyl)-phenyl]-5-ethyl-7-propyl-3H-imid-azo[5,1-f][1,2,4]triazin-4-on s 1 jT' H.C^-0 Η fY, . ^ o=s=o ch3 6
N
15 I
CH3 På tilsvarende måde fås ud fra 640 mg (1,50 mmol) 4-ethoxy 3 (5-ethyl-4-oxo-7-propyl-3,4-dihydro-imidazo[5,1-f][1,2,4]triazin-2-yl)-benzensulfonsyrechlorid og 450 mg 20 (4,5 mmol) 4-hydroxyethylpiperazin 495 mg (66%) 2-[2-ethoxy-5-(4-methylpiperazin-1- sulfonyl)-phenyl]-5-ethyl-7-propyl-3H4midazo[5,1-f][1,2,4]triazin-4-on. Rf- 0,30 (methy-lenchlorid/methanol = 19:1).
200 MHz 1H-NMR (CDCI3): 1,01, t, 3H; 1,35, t, 3H; 1,61, t, 3H; 1,89, sex., 2H; 2,31, s, 25 3H; 2,53, m, 4H; 3,05, m, 8H; 4,35, quart., 2H; 7,17, d, 1H; 7,89, dd, 1H; 8,48, d, 1H; 9,65, s, 1H.
De i det følgende anførte sulfonamider fremstilledes ved automatiseret parallelsyntese ud fra 4-ethoxy-3-(5-methyl-4-oxo-7-propyl-3,4-dihydro-imidazo[5,1 -f][1,2,4]triazin-2-30 yl)-benzensulfonsyrechlorid og den tilsvarende amin efter en af de tre følgende standardforskrifter.
Slutprodukternes renhed bestemtes ved HPLC, og deres karakterisering foretoges ved LC-MS-måling. Indholdet af den ønskede forbindelse ifølge HPLC-MS er i tabellerne 35 angivet procentisk i spalten “HPLC”. Standardforskrift A anvendtes ved aminer med 28 DK 176852 B1 sure funktionaliteter, standardforskrift B ved aminer med neutrale funktionaliteter og standardforskrift C ved aminer med yderligere basiske funktionaliteter.
I de følgende strukturformler er der lejlighedsvis givet afkald på afbildning af hydro-5 genatomerne. Nitrogenatomer med en fri valens skal derfor opfattes som -NH-gruppe.
Standardforskrift A: Omsætning af aminer med sure funktionaliteter Først anbringes 0,05 mmol amin, 0,042 mmol sulfonsyrechlorid og 0,10 mmol natrium-10 carbonat, og 0,5 ml af en blanding af THF og vand tilpipetteres manuelt. Efter 24 timer ved stuetemperatur tilsættes 0,5 ml 1 M svovlsyreopløsning, og der filtreres gennem en tofaset kartusche (500 mg Extrelut {overfase) og 500 mg Si02, løbemiddel ethyla-cetat). Efter inddampning af filtratet i vakuum fås produktet.
15 Standardforskrift B: Omsætning af aminer med neutrale funktionaliteter Først anbringes 0,125 mmol amin, og fra synteseapparatet tilpipetteres 0,03 mmol sulfonsyrechlorid som opløsning i 1,2-dichlorethan. Efter 24 timer sættes 0,5 ml 1 M svovlsyre til blandingen, som filtreres gennem en tofaset kartusche (500 mg Extrelut 20 (overfase) og 500 mg Si02, løbemiddel: ethylacetat). Filtratet inddampes i vakuum.
Standardforskrift C: Omsætning af aminer med basiske funktionaliteter Først anbringes 0,05 mmol amin, og fra synteseapparatet tilpipetteres 0,038 mmol 25 sulfonsyrechlorid som opløsning i 1,2-dichlorethan og 0,05 mmol triethylamin som opløsning i 1,2-dichlorethan. Efter 24 timer tilsættes først 3 ml mættet natriumhydrogen-carbonatopløsning, og reaktionsblandingen filtreres gennem en tofaset kartusche. Efter inddampning af filtratet i vakuum fås produktet.
30 Alle reaktioner følges tyndtlagschromatografisk. I det tilfælde, at der efter 24 timer ved stuetemperatur ikke er sket fuldstændig omsætning, opvarmes i yderligere 12 timer til 60°C, og derefter afsluttes forsøget.
DK 176852 B1 29 nr Stmlrtnr MV HPLC MS +
H
fe/molj 7 ca O II 523,6780 S0~~ 529
S rV
__T. CH,
N
ό * « j*1*1 " “
SM
<r*V
JL c* ό 9 r« o I477-586 >95 478 S jrV? ’ T CH, 0=^=0 V- 30 DK 176852 B1
Eksempel 10 2-[2-Ethoxy-5-(4-ethyl-piperazin-1-sulfonyl)-phenyl]-5-methyl-7-propyi-3H-imid- azo[5,1-f][1,2,4]triazin-4-on-dihydrochlorid
-Λ-C
øM
10 oXo CH3 o f 15 0 H,<r 0,35 g (0,712 mmol) 2-[2-ethoxy-5-(4-ethyl-piperazin-1-sulfonyl)-phenyl]-5-methyl-7-propyl-3H-imidazo[5,1-f][1,2,4jtriazin-4-on suspenderes i 8 ml ether, og der tilsættes så 20 meget methylenchlorid, at der opstår en homogen opløsning. 2,4 ml 1 M opløsning af HCI i ether tilsættes, og der omrøres i 20 minutter ved stuetemperatur og frasuges.
Herved fås 372 mg (99%) 2-[2-ethoxy-5-(4-ethyl-piperazin-1-sulfonyl)-phenyl]-5-methyl-7-propyl-3H-imidazo[5,1-f][1,2,4]triazin-4-on-dihydrochlorid.
25 200 MHz 1H-NMR (DMSO-d6): 0,96, t, 3H; 1,22, t, 3H; 1,36, t, 3H; 1,82, sex., 2H; 2,61, s, 3H; 2,88, m, 2H; 3,08, m, 6H; 3,50, m, 2H; 3,70, m, 2H; 4,25, quart., 2H; 7,48, d, 1H; 7,95, m, 2H; 11,42, s, 1H; 12,45, s, 1H.
30 35
Eksempel 11 31 DK 176852 B1 2-[2-Ethoxy-5-(4-ethyl-piperazin-1-sulfonyi)-phenyl]-5-methyl-7-propyl-3H-imid- azo[5,1-f][1,2,4]triazin-4-on-hydrochlorid-trihydrat 5 -9 ch3 h.c'''Sso hn'AV=5\ • „ri !
r, +J Ci" x3 H20 nC
15 j H
W£T
Omkrystalliseres den frie base fra eksempel 2 fra en blanding af et organisk opløsningsmiddel og fortyndet vandig saltsyre, fås et hydrochlorid-trihydrat med smp.
20 218°C.
Vandindhold: 9,4% (K. Fischer)
Chloridindhold: 6,1%
Claims (11)
1 X. c") 35 [j^f NH xHCI DK 176852 B1 i hvilken R5 betyder en ethoxygruppe, i en totrinsreaktion i systemerne ethanol og phosphoroxytrichlorid/dichlorethan til forbindelserne med den almene formel IV 5 O D1 rtM. ¢^1, - i hvilken R1, R2 og R5 har de ovenfor angivne betydninger, 15. et videre trin omsætter med chlorsulfonsyre til forbindelserne med den almene formel V O so2ci i hvilken
25 R1, R2 og R5 har de ovenfor angivne betydninger, og endelig omsætter med de pågældende aminer i indifferente opløsningsmidler.
1. Forbindelse valgt fra den følgende tabel A:
2. Forbindelse med følgende formel O CHj h3c"^o 15 111 ,,n i°2 20 Γ ] X HCI C2Hs
3. Forbindelse med følgende formel 25 ~~ i fHj................ H3C 0 | I I .N . (r\ T CH, SO, A f | +2x HCI Nr
35 I 0^5 DK 176852 B1
4. Forbindelse med følgende formel Tf3 HaC i H1 m/N rjN Λ olo CH> CO Cl' X3H20 JH H3C
5. Forbindelse ifølge et af kravene 1 til 4 til behandling af sygdomme.
5 Tabel A ”7 jTF h3c^o ir\ T ch3 0 ch3 m CH, H.C-^0 HN-^Y=(n Cr " \ T CH, SO, 1 2 o |_ό_I DK 176852 B1 ^ HN vc ίι N Λ I ch3 l°2 ή N (CHjJj-OH "hXT” " CH, S02 I 2 0 N 4¾ X j,Hs sL· (Τ' \ T CH, h ΰ N ^Hj DK 176852 B1 i f» i H9c^0 CH, 0 SF n CH3 CH, SO, 1 2 i OH *-0 H, V? M s T CH, SO, Λ CH, CH, DK 176852 B1 — — - Η3°^0 . . so, 3 i 2 Λ c2h5 ch2-oh 10 og deres fysiologisk acceptable salte og hydrater.
6. Fremgangsmåde til fremstilling af forbindelser ifølge et af kravene 1 til 4, kendetegnet ved, at man 20 først omsætter forbindelser med den almene formel II
0 R1 O AV'01 (ll) 25 0 i hvilken R1 betyder methyl eller ethyl, R2 betyder propyl, og L betyder ligekædet eller forgrenet alkyl med indtil 4 carbonatomer, 30 med forbindelser med den almene formel III NH2 R5 NH
7. Lægemiddel indeholdende mindst én forbindelse ifølge et af kravene 1 til 4 samt 30 farmakologisk acceptable formuleringsmidler.
8. Lægemiddel ifølge krav 7 til behandling af cardiovaskulære, cerebrovaskulære sygdomme og/eller sygdomme i urogenitalområdet. 35
9. Lægemiddel ifølge krav 8 til behandling af erektionssvigt. DK 176852 B1
10. Anvendelse af forbindelser ifølge et af kravene 1 til 4 til fremstilling af lægemidler.
11. Anvendelse ifølge krav 10, ved hvilken lægemidlet virker mod erektionssvigt. 5
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Application Number | Priority Date | Filing Date | Title |
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DE19750085 | 1997-11-12 | ||
DE19750085A DE19750085A1 (de) | 1997-11-12 | 1997-11-12 | 2-Phenyl-substituierte Imidazotriazinone |
DE1998112462 DE19812462A1 (de) | 1998-03-23 | 1998-03-23 | 2-[2-Ethoxy-5(4-ethyl-piperazin-1-sulfonyl) -phenyl]-5-methyl-7-prophyl-3H-imidazo[5,1-f][1,2,4]triazin-4-on Dihydrochlorid |
DE19812462 | 1998-03-23 | ||
DE19840289 | 1998-09-04 | ||
DE1998140289 DE19840289A1 (de) | 1998-09-04 | 1998-09-04 | 2-Phenyl-substituierte Imidazotriazinone |
PCT/EP1998/006910 WO1999024433A1 (de) | 1997-11-12 | 1998-10-31 | 2-phenyl-substituierte imidazotriazinone als phosphodiesterase inhibitoren |
EP9806910 | 1998-10-31 |
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DK01123321.0T DK1174431T3 (da) | 1997-11-12 | 1998-10-31 | 2-phenyl-substitueret imidazo triazinon som phoshodiesterase-inhibitorer |
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US20040014761A1 (en) * | 1997-10-28 | 2004-01-22 | Place Virgil A. | Treatment of female sexual dysfunction with phosphodiesterase inhibitors |
US6403597B1 (en) * | 1997-10-28 | 2002-06-11 | Vivus, Inc. | Administration of phosphodiesterase inhibitors for the treatment of premature ejaculation |
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