FI58124B - NY MELLANPROTUKT 3,4-DIMETOXY-6- (4- (2-FUROYL) -1-PIPERAZINYLTHOUREA) -BENONITRIL FOR FRAMSTAELLNING AV 6,7-DIMETOXY-4-AMINO-2- (4- (2-FUROYL) -1 -PIPERAZINYL) QUINAZOLINE WITH BLODTRYCKSSAENKANDE VERKAN - Google Patents

NY MELLANPROTUKT 3,4-DIMETOXY-6- (4- (2-FUROYL) -1-PIPERAZINYLTHOUREA) -BENONITRIL FOR FRAMSTAELLNING AV 6,7-DIMETOXY-4-AMINO-2- (4- (2-FUROYL) -1 -PIPERAZINYL) QUINAZOLINE WITH BLODTRYCKSSAENKANDE VERKAN Download PDF

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Publication number
FI58124B
FI58124B FI763614A FI763614A FI58124B FI 58124 B FI58124 B FI 58124B FI 763614 A FI763614 A FI 763614A FI 763614 A FI763614 A FI 763614A FI 58124 B FI58124 B FI 58124B
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FI
Finland
Prior art keywords
furoyl
dimetoxy
quinazoline
piperazinyl
dimethoxy
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Application number
FI763614A
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Finnish (fi)
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FI763614A (en
FI58124C (en
Inventor
Erkki Juhani Honkanen
Aino Kyllikki Pippuri
Original Assignee
Orion Yhtymae Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Orion Yhtymae Oy filed Critical Orion Yhtymae Oy
Priority to FI763614A priority Critical patent/FI58124C/en
Priority to CH1438277A priority patent/CH630624A5/en
Priority to SE7713377A priority patent/SE424993B/en
Priority to AT867177A priority patent/AT358047B/en
Priority to ZA00777222A priority patent/ZA777222B/en
Priority to NL7713703A priority patent/NL7713703A/en
Priority to NO774263A priority patent/NO146239C/en
Priority to HU77OI217A priority patent/HU174048B/en
Priority to PL1977202898A priority patent/PL106201B1/en
Priority to DE19772755638 priority patent/DE2755638A1/en
Priority to BE183425A priority patent/BE861822A/en
Priority to SU772555751A priority patent/SU923370A3/en
Priority to CA293,066A priority patent/CA1102332A/en
Priority to DK558377A priority patent/DK145822C/en
Priority to DD77202667A priority patent/DD134226A1/en
Priority to CS778433A priority patent/CS197312B2/en
Priority to JP15157177A priority patent/JPS5387375A/en
Publication of FI763614A publication Critical patent/FI763614A/en
Publication of FI58124B publication Critical patent/FI58124B/en
Application granted granted Critical
Publication of FI58124C publication Critical patent/FI58124C/en

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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D307/00Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
    • C07D307/02Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings
    • C07D307/34Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
    • C07D307/56Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D307/68Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Plural Heterocyclic Compounds (AREA)
  • Furan Compounds (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

ΓΓ=^1 rBl Μ4% KU ULUTUSJULKAISUΓΓ = ^ 1 rBl Μ4% KU RELEASE PUBLICATION

«Ha lbj {11) utläggningsskrift 24 C (45) Patentti mycnnrtty 10 12 19B0 Patent meddelat ^ (51) Kv.ik.Vci.3 C 07 D 405/06«Ha lbj {11) utläggningsskrift 24 C (45) Patent mycnnrtty 10 12 19B0 Patent meddelat ^ (51) Kv.ik.Vci.3 C 07 D 405/06

SUOM l — FI N LAN D (21) P»t«n«lh»k*mu* —P*tw*»n»öknin| 7636lUFINLAND l - FI N LAN D (21) P »t« n «lh» k * mu * —P * tw * »n» öknin | 7636lU

(22) H*k*ml*p»lvi — Aiweknln|tdt| 15· 12 *76 (23) Alkuptivt—GHtlshutadag 15-12.76(22) H * k * ml * p »lvi - Aiweknln | tdt | 15 · 12 * 76 (23) Alkuptivt — GHtlshutadag 15-12.76

(41) Tullut Julkiseksi — Bllvlt off«ntlt| l6.O6.7B(41) Became Public - Bllvlt off «ntlt | l6.O6.7B

fatunttl·· J» rekisterihallitus (44) Nlhtivtkslptnon Ja kuukjulkalsun pvm— ofatunttl · · J »registry board (44) Nlhtivtkslptnon Ja moonjulkalsun pvm— o

Patent- och registerstyrelsen ' ' Ansakin utiajd och uti.skrtften put>iic«r*d 29. Oö. öOPatent- och registerstyrelsen '' Ansakin utiajd och uti.skrtften put> iic «r * d 29. Oö. oO

~ (32)(33)(31) Pyydetty «uolkuut—Begird prloritet (71) Orion-yhtymä Oy, Nilsiänkatu 10-lU, 00510 Helsinki 51, Suomi-Finland(FI) _ (72) Erkki Juhani Honkanen, Helsinki, Aino Kyllikki Pippuri, Espoo,~ (32) (33) (31) Requested «uirdkuut — Begird prloritet (71) Orion Corporation Ltd, Nilsiänkatu 10-lU, 00510 Helsinki 51, Finland-Finland (FI) _ (72) Erkki Juhani Honkanen, Helsinki, Aino Kyllikki Pepper, Espoo,

Suomi-Finland(Fl) (7*0 Berggren Oy Ab (5*0 Uusi välituote 3,^-dimetoksi-6-/l+-(2-furoyyli )-l-piperatsinyylitiokarbamidoJ-bentsonitriili verenpainetta alentavasti vaikuttavan 6,7-dimetoksi-U-amino-2-/I|-(2-furoyyli)-l-piperatsinyyli7kinatsoliinin valmistamiseksi - Ny mellan-produkt 3,1+~0ϊπΐθ1οχΐ-6-/Ι|-(2-ί\ΛΓογ1 )-l-piperazinyltiokarbamido7bensonitril för framställning av 6,7-dimetoxi-l+-amino-2-/h-(2-furoyl)-l-piperazinyl7~ kinazolin med blodtryckssänkande verkan Tämä keksintö tarkoittaa uutta välituotetta 3,4-dimetoksi-6-^4-(2-furoyyli)-l-piperatsinyylitiokarbamidg/-bentsonitriiliä, jolla on kaavaSuomi-Finland (Fl) (7 * 0 Berggren Oy Ab (5 * 0 New intermediate 3, 4-dimethoxy-6- [1 + - (2-furoyl) -1-piperazinylthiocarbamido] -benzonitrile antihypertensive 6,7-dimethoxy- For the preparation of U-amino-2- [1- (2-furoyl) -1-piperazinyl] quinazoline - Ny mellan product 3,1 + ϊϊϊΐθοχΐ-6- [β- (2-β-β) -1-piperazinylthiourea] benzonitrile for The present invention relates to a novel intermediate 3,4-dimethoxy-6- [4- (2-furoyl) -1-piperazinyl] -quinazoline with a compound. furoyl) -1-piperazinylthiourea / benzonitrile of formula

CH-,0.v^\v,'NH - C - N N-OC < °^l IICH-, 0.v ^ \ v, 'NH - C - N N-OC <° ^ l II

joX ; w ^joX; w ^

CH30 CNCH30 CN

Keksinnön mukaista välituotetta voidaan valmistaa siten, että 3,4-dimetoksi-6-aminobentsonitriili, jolla on kaavaThe intermediate of the invention can be prepared by reacting 3,4-dimethoxy-6-aminobenzonitrile of formula

CH30 CNCH30 CN

saatetaan reagoimaan tiofosgeenin kanssa 3,4-dimetoksi-6-isotiosya-naattobentsonitriilin muodostamiseksi, jolla on kaava 2 58124 ch3<S^/,cs CH3o ja tämä yhdiste saatetaan reagoimaan 1-(2-furoyyli)piperatsiinin kanssa, jolla on kaava /—\ /°\ tai kaavan VI mukainen 1-(2-furoyyli)piperatsiini saatetaan reagoimaan tiofosgeenin kanssa 4-(2-furoyyli)piperatsinyylitiokarbonyyliklori-din muodostamiseksi, jolla on kaava ci-?-(_)n'ocO vi1is reacted with thiophosgene to form 3,4-dimethoxy-6-isothiocyanatobenzonitrile of formula 2 58124 ch3 <S ^ /, cs CH3o and this compound is reacted with 1- (2-furoyl) piperazine of formula 1- (2-furoyl) piperazine of formula VI is reacted with thiophosgene to form 4- (2-furoyl) piperazinylthiocarbonyl chloride of formula ci -? - (_) n'ocO vi1

SS

ja tämä yhdiste saatetaan reagoimaan kaavan IV mukaisen 3,4-dimetok-si-6-aminobentsonitriilin kanssa.and this compound is reacted with 3,4-dimethoxy-6-aminobenzonitrile of formula IV.

Keksinnön mukainen välituote soveltuu pratsosiinin eli 6,7-dimetoksi- 4-amino-2-/4-(2-furoyyli)-l-piperatsinyyli7-kinatsoliinin valmistamiseksi. Tällä yhdisteellä, jolla on kaava N / \The intermediate according to the invention is suitable for the preparation of prazosin, i.e. 6,7-dimethoxy-4-amino-2- [4- (2-furoyl) -1-piperazinyl] -quinazoline. With this compound of formula N / \

V_/ " \JV_ / "\ J

CH3° '‘ nh2 on erittäin voimakas verenpainetta alentava vaikutus, mikä tunnetaan Oohen'in kirjoituksesta julkaisussa Journal Of Clinical Pharmacology,10 s.408 (1970).CH3 ° 'nh2 has a very potent antihypertensive effect, known from Oohen, Journal Of Clinical Pharmacology, 10 p.408 (1970).

Pratsosiinin valmistus lähtien keksinnön mukaisesta välituotteesta voidaan suorittaa siten, että 3,4-dimetoksi-6-/4-(2-furoyyli)-l-piperatsinyylitiokarbamido/bentsonitriili saatetaan reagoimaan metyy-lijodidin kanssa metyyli-N-(3,4-dimetoksi-6-syanofenyyli)-/4-(2-furoyyli)-l-piperatsinyyli7tioformamidaatin muodostamiseksi, jolla on kaava 3 58124 N="oc 111 CH30 CN 3 ja tämä yhdiste syklisoidaan kuumentamalla sitä ammoniakin kanssa polaarisessa liuottimessa alkalimetalliamidin läsnäollessa.The preparation of prazosin from the intermediate of the invention can be carried out by reacting 3,4-dimethoxy-6- [4- (2-furoyl) -1-piperazinylthiourea / benzonitrile with methyl iodide with methyl N- (3,4-dimethoxy- 6-Cyanophenyl) - [4- (2-furoyl) -1-piperazinyl] thioformamidate of formula 58124 N = "oc 111 CH 3 O 3 CN 3 and this compound is cyclized by heating with ammonia in a polar solvent in the presence of an alkali metal amide.

Lähdettäessä keksinnön mukaisesta välituotteesta on mahdollista suorittaa pratsosiinin valmistus myös yhtäjaksoisesti samassa liuotti-messa välituotteen eristämättä, mikä tekee valmistuksen hyvin yksinkertaiseksi .Starting from the intermediate according to the invention, it is also possible to carry out the preparation of prazosin continuously in the same solvent without isolating the intermediate, which makes the preparation very simple.

^ Tunnetaan ennestään useita menetelmiä pratsosiinin ja samaan ryhmään kuuluvien yhdisteiden valmistamiseksi. Nämä menetelmät on kuvattu USA-patenttijulkaisussa 3 511 836, hollantilaisessa patenttijulkaisussa 72 06067 ja saksalaisessa hakemusjulkaisussa 2 457 911, ja yhteistä niille on, että kinatsoliinirenkaan muodostuminen tapahtuu kahden eri molekyylin kesken tapahtuvassa reaktiossa. Sen sijaan keksinnön mukaista välituotetta käytettäessä kinatsoliinirenkaan muodostuminen tapahtuu molekyylin sisäisesti lopulliseksi yhdisteeksi. Kahden eri molekyylin välisessä reaktiossa on aina suuremmat mahdollisuudet kuin molekyylin sisäisesti tapahtuvassa syklisointireaktios-sa muodostua erilaisia sivutuotteita. Niinpä valmistettaessa pratso-siinia hollantilaisessa patenttijulkaisussa 72 06067 kuvatun menetelmän mukaan, muodostuu reaktio-olosuhteista riippuen vaihtelevia määriä erilaisia epäpuhtauksia, joiden poistaminen lopputuotteesta on osoittautunut erittäin työlääksi. Raakatuote joudutaan tämän vuoksi kiteyttämäään useita kertoja ennen kuin se täyttää lääkeraaka-aineen puhtaudelle asetettavat vaatimukset, ja tällöin puhtaan tuotteen saanto laskee. Valmistettaessa sen sijaan pratsosiinia keksinnön mukaisesta välituotteesta lähtien, ei edellä mainittuja, vaikeasti poistettavia epäpuhtauksia muodostu, ja näin ollen saadaan puhdasta lopputuotetta huomattavasti paremmalla saannolla. Myös keksinnön mukainen välituote voidaan valmistaa helposti ja hyvällä saannolla. Välituote ja pratsosiini voidaan valmistaa samassa reaktioastiassa välituotteita eristämättä.Several methods are known for the preparation of prazosin and compounds belonging to the same group. These methods are described in U.S. Patent 3,511,836, Dutch Patent 72,06067 and German Application 2,457,911, and have in common that the formation of the quinazoline ring occurs in a reaction between two different molecules. Instead, when the intermediate of the invention is used, the formation of the quinazoline ring occurs intramolecularly to the final compound. The reaction between two different molecules always has a higher potential than the formation of different by-products in an intramolecular cyclization reaction. Thus, in the preparation of prazosin according to the method described in Dutch Patent Publication No. 72,06067, depending on the reaction conditions, varying amounts of various impurities are formed, the removal of which from the final product has proved to be very laborious. The crude product therefore has to be crystallized several times before it meets the requirements for the purity of the drug raw material, in which case the yield of the pure product decreases. Instead, in the preparation of prazosin from the intermediate according to the invention, the above-mentioned, difficult-to-remove impurities are not formed, and thus the pure end product is obtained in a much better yield. The intermediate according to the invention can also be prepared easily and in good yield. The intermediate and prazosin can be prepared in the same reaction vessel without isolating the intermediates.

Seuraavat esimerkit havainnollistavat keksintöä.The following examples illustrate the invention.

4 581244 58124

Esimerkki 1 3.4- dimetoksi-6-/4-(2-furoyyli)-l-piperatsinyylitiokarbamido7-bentsonitriili 11,2 g (0,051 moolia) kaavan V mukaista 3,4-dimetoksi-6-isotiosya-naattobentsonitriiliä liuotetaan 65 mlsaan etyyliasetaattia ja lisätään sekoittaen 0°C:ssa vähitellen liuokseen, jossa on 9,2 g (0,051 moolia) 1-(2-furoyyli)-piperatsiinia 65 ml:ssa etyyliasetaattia. Liuoksen annetaan seistä yön yli -25°C:ssa, jolloin tuote kiteytyy. Suodatetaan ja kiteet pestään kylmällä etyyliasetaatilla sekä kuivataan. Saadaan 16,3 g (80 % teoreettisesta) 3,4-dimetoksi-6-/4-(2-furoyyli)-l-piperatsinyylitiokarbamido7bentsonitriiliä. Sp. 178-180°C.Example 1 3,4-Dimethoxy-6- [4- (2-furoyl) -1-piperazinylthiocarbamido] -benzonitrile 11.2 g (0.051 mol) of 3,4-dimethoxy-6-isothiocyanatobenzonitrile of the formula V are dissolved in 65 ml of ethyl acetate and added. with gradual stirring at 0 ° C to a solution of 9.2 g (0.051 mol) of 1- (2-furoyl) piperazine in 65 ml of ethyl acetate. The solution is allowed to stand overnight at -25 ° C, whereupon the product crystallizes. Filter and wash the crystals with cold ethyl acetate and dry. 16.3 g (80% of theory) of 3,4-dimethoxy-6- [4- (2-furoyl) -1-piperazinylthiourea] benzonitrile are obtained. Sp. 178-180 ° C.

C19H20N4°4S Lask. C = 56,99 Hav. C « 57,41 H = 5,03 H = 5,39 N = 13,99 N = 14,14 S = 8,01 S = 7,68 Lähtöaineena käytetty 3,4-dimetoksi-6-isotiosyanaattobentsonitriili voidaan valmistaa seuraavasti.C19H20N4 ° 4S Calcd. C = 56.99 Hav. C <57.41 H = 5.03 H = 5.39 N = 13.99 N = 14.14 S = 8.01 S = 7.68 The starting 3,4-dimethoxy-6-isothiocyanate benzonitrile can be prepared as follows.

27.0 g (0,15 moolia) 3,4-dimetoksi-6-aminobentsonitriiliä (IV) liuotetaan 150 ml:aan 1,2-dikloorietaania ja lisätään vähitellen 0-5° C:ssa seokseen, jossa on 23,0 g (0,2 moolia) tiofosgeenia, 100 ml 1,2-dikloorietaania, 20,0 g (0,2 moolia) kalsiumkarbonaattia sekä 200 ml vettä. Lisäyksen jälkeen sekoitetaan vielä 1 tunti 0-5° C:ssa, sen jälkeen 16 tuntia 20°C:ssa ja lopuksi 1 tunti 35°C:ssa. Reaktioseos suodatetaan ja dikloorietaanikerros erotetaan, pestään laimealla kloorivetyhapolla sekä vedellä ja kuivataan MgS04:llä. Liuotin poistetaan vakuumissa ja kiteinen jäännös (sp. 126-7°C) käytetään sellaisenaan seuraavaan vaiheeseen. Saadaan 31,0 g (94 % teoreettisesta) 3,4-dimetoksi-6-isotiosyanaattobentsonitriiliä.27.0 g (0.15 mol) of 3,4-dimethoxy-6-aminobenzonitrile (IV) are dissolved in 150 ml of 1,2-dichloroethane and gradually added at 0-5 ° C to a mixture of 23.0 g (0 , 2 moles) of thiophosgene, 100 ml of 1,2-dichloroethane, 20.0 g (0.2 moles) of calcium carbonate and 200 ml of water. After the addition, stirring is continued for 1 hour at 0-5 ° C, then for 16 hours at 20 ° C and finally for 1 hour at 35 ° C. The reaction mixture is filtered and the dichloroethane layer is separated, washed with dilute hydrochloric acid and water and dried over MgSO 4. The solvent is removed in vacuo and the crystalline residue (m.p. 126-7 ° C) is used as such for the next step. 31.0 g (94% of theory) of 3,4-dimethoxy-6-isothiocyanatebenzonitrile are obtained.

C10H8N2°2S Lask. C = 54,53 Hav. C = 53,43 H = 3,66 H = 3,78 N = 12,72 N = 12,18 5 = 14,56 S = 13,79C10H8N2 ° 2S Calc. C = 54.53 Hav. C = 53.43 H = 3.66 H = 3.78 N = 12.72 N = 12.18 δ = 14.56 S = 13.79

Esimerkki 2 3.4- dimetoksi-6-/4-(2-furoyyli)-l-piperatsinyylitiokarbamido7“ bentsonitriili 5.0 g (0,028 moolia) kaavan VI mukaista 1-(2-furoyyli)piperatsiiniaExample 2 3,4-Dimethoxy-6- [4- (2-furoyl) -1-piperazinylthiourea] benzonitrile 5.0 g (0.028 moles) of 1- (2-furoyl) piperazine of formula VI

FI763614A 1976-12-15 1976-12-15 NY MELLANPROTUKT 3,4-DIMETOXY-6- (4- (2-FUROYL) -1-PIPERAZINYLTHOUREA) -BENONITRIL FOR FRAMSTAELLNING AV 6,7-DIMETOXY-4-AMINO-2- (4- (2-FUROYL) -1 -PIPERAZINYL) QUINAZOLINE WITH BLODTRYCKSSAENKANDE VERKAN FI58124C (en)

Priority Applications (17)

Application Number Priority Date Filing Date Title
FI763614A FI58124C (en) 1976-12-15 1976-12-15 NY MELLANPROTUKT 3,4-DIMETOXY-6- (4- (2-FUROYL) -1-PIPERAZINYLTHOUREA) -BENONITRIL FOR FRAMSTAELLNING AV 6,7-DIMETOXY-4-AMINO-2- (4- (2-FUROYL) -1 -PIPERAZINYL) QUINAZOLINE WITH BLODTRYCKSSAENKANDE VERKAN
CH1438277A CH630624A5 (en) 1976-12-15 1977-11-24 Processes for preparing 3,4-dimethoxy-4-amino-2-(4-(2-furoyl)-1-piperazinylthiocarbamido)benzo nitrile.
SE7713377A SE424993B (en) 1976-12-15 1977-11-25 INTERMEDIATE FOR THE PREPARATION OF 6,7-DIMETOXY-4-AMINO-2- / 4- (2-FUROYL) -1-PIPERAZINYL / CHINAZOLINE WITH ANTI-BLOOD PRESSURE EFFECT
AT867177A AT358047B (en) 1976-12-15 1977-12-05 METHOD FOR PRODUCING THE NEW 3,4- -DIMETHOXY-6- (4- (2-FUROYL) -1-PIPERAZINYLTHIO-CARBAMIDO) -BENZONITRILE
ZA00777222A ZA777222B (en) 1976-12-15 1977-12-05 An intermediate product for the production of 6,7-dimethoxy-4-amino-2-(4-(furoyl)-1-piperazinyl)quinazoline having an antihypertensive effect
NL7713703A NL7713703A (en) 1976-12-15 1977-12-11 INTERMEDIATE FOR THE PREPARATION OF 6,7-DIMETHO-XY-4-AMINO-2- (4- (FUROYL) -1-PIPERAZINYL) CHINAZOLINE WHICH HAS ANTI-HYPERTENSIVE ACTION.
NO774263A NO146239C (en) 1976-12-15 1977-12-12 INTERMEDIATE FOR PREPARATION OF 6,7-DIMETOXY-4-AMINO-2- (4- (2-FUROYL) -1-PIPERAZINYL) CHINAZOLINE WITH ANTI-PRESSURE EFFECTIVE EFFECT
PL1977202898A PL106201B1 (en) 1976-12-15 1977-12-13 METHOD OF MAKING 3,4-DIMETOXY-6- / 4- / 2-FUROILO / -1-PIPERAZINLTHIOCARBAMIDE / -BENZONITRILE
HU77OI217A HU174048B (en) 1976-12-15 1977-12-13 Process for producing new intermediate fo 6,7-dimethoxy-4-amino-2-square bracket-4- bracket-2-furoiyl-bracket closed-1-piperazinyl-square bracket closed-quinasoline of osed-1-piperazinyl-square bracket closed-quinasoline of
BE183425A BE861822A (en) 1976-12-15 1977-12-14 INTERMEDIATE FOR THE PREPARATION OF 6,7-DIMETHOXY-4-AMINO-2 (4- (2-FUROYL) -1-PIPERAZINYL) QUINAZOLINE EXERCISING ANTIHYPERTENSIFY EFFECT
SU772555751A SU923370A3 (en) 1976-12-15 1977-12-14 Process for producing 3,4-dimethoxy-6-(4-(2-furoyl)-1-piperazinylthiocarbamido) benzonitrile
CA293,066A CA1102332A (en) 1976-12-15 1977-12-14 Intermediate product for the production of 6,7- dimethoxy-4-amino-2-¬4-(2-furoyl)-1- piperazinyl|quinazoline having an antihypertensive effect
DK558377A DK145822C (en) 1976-12-15 1977-12-14 3,4-DIMETHOXY-6- (4- (2-FUROYL) -1-PIPERAZINYLTHIOCARBAMIDO) BENZONITRIL USED AS INTERMEDIATE IN THE PREPARATION OF 6,7-DIMETHOXY-4-AMINO-2- (4- (2-FURO) 1-piperazinyl) quinazoline
DE19772755638 DE2755638A1 (en) 1976-12-15 1977-12-14 INTERMEDIATE PRODUCT FOR THE PRODUCTION OF BLOOD PRESSURE-REDUCING 6,7-DIMETHOXY- 4-AMINO-2-CORNER CLAMP ON 4- (2-FUROYL) - 1-PIPERAZINYL CORNER CLAMP ON CHINAZOLINE
DD77202667A DD134226A1 (en) 1976-12-15 1977-12-15 PROCESS FOR THE PREPARATION OF 3,4-DEMETHOXY-6-CORNER CLAUSE TO 4- (2-FUROYL) -1-PIPERAZINYL SQUARE BRACKET TO BENZONITRIL
CS778433A CS197312B2 (en) 1976-12-15 1977-12-15 Method of producing 3,4-dimethoxy-6-/4-/2-furoyl/-1-piperazinyl-thiocarbamido/benzonitrile
JP15157177A JPS5387375A (en) 1976-12-15 1977-12-15 3*44dimethoxyy66*44*22furoyl**11piperadinylthioo carbamide*benzonitrile and method for its production

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI763614 1976-12-15
FI763614A FI58124C (en) 1976-12-15 1976-12-15 NY MELLANPROTUKT 3,4-DIMETOXY-6- (4- (2-FUROYL) -1-PIPERAZINYLTHOUREA) -BENONITRIL FOR FRAMSTAELLNING AV 6,7-DIMETOXY-4-AMINO-2- (4- (2-FUROYL) -1 -PIPERAZINYL) QUINAZOLINE WITH BLODTRYCKSSAENKANDE VERKAN

Publications (3)

Publication Number Publication Date
FI763614A FI763614A (en) 1978-06-16
FI58124B true FI58124B (en) 1980-08-29
FI58124C FI58124C (en) 1980-12-10

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AT (1) AT358047B (en)
BE (1) BE861822A (en)
CA (1) CA1102332A (en)
CH (1) CH630624A5 (en)
CS (1) CS197312B2 (en)
DD (1) DD134226A1 (en)
DE (1) DE2755638A1 (en)
DK (1) DK145822C (en)
FI (1) FI58124C (en)
HU (1) HU174048B (en)
NL (1) NL7713703A (en)
NO (1) NO146239C (en)
PL (1) PL106201B1 (en)
SE (1) SE424993B (en)
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FI67699C (en) * 1979-01-31 1985-05-10 Orion Yhtymae Oy PROCEDURE FOR THE FRAMSTATION OF AV 6,7-DIMETOXY-4-AMINO-2- (4- (2-FUROYL) -1-PIPERAZINYL) QUINAZOLINE HYDROCHLORIDE WITH BLODTRYCKSSAENKANDE VERKAN

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US3935213A (en) * 1973-12-05 1976-01-27 Pfizer Inc. Process for hypotensive 4-amino-2-(piperazin-1-yl) quinazoline derivatives

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CS197312B2 (en) 1980-04-30
CH630624A5 (en) 1982-06-30
DK145822B (en) 1983-03-14
ATA867177A (en) 1980-01-15
SE424993B (en) 1982-08-23
NO774263L (en) 1978-06-16
AT358047B (en) 1980-08-11
JPS5387375A (en) 1978-08-01
SE7713377L (en) 1978-06-16
DD134226A1 (en) 1979-02-14
CA1102332A (en) 1981-06-02
PL106201B1 (en) 1979-12-31
ZA777222B (en) 1978-09-27
FI763614A (en) 1978-06-16
BE861822A (en) 1978-03-31
DE2755638A1 (en) 1978-06-22
NL7713703A (en) 1978-06-19
DK145822C (en) 1983-08-29
SU923370A3 (en) 1982-04-23
NO146239B (en) 1982-05-18
JPS6225145B2 (en) 1987-06-01
HU174048B (en) 1979-10-28
NO146239C (en) 1982-08-25
FI58124C (en) 1980-12-10
PL202898A1 (en) 1978-08-28
DK558377A (en) 1978-06-16

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