CH441310A - Process for the preparation of new heterocyclic guanyl hydrazine derivatives - Google Patents

Process for the preparation of new heterocyclic guanyl hydrazine derivatives

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Publication number
CH441310A
CH441310A CH596064A CH596064A CH441310A CH 441310 A CH441310 A CH 441310A CH 596064 A CH596064 A CH 596064A CH 596064 A CH596064 A CH 596064A CH 441310 A CH441310 A CH 441310A
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CH
Switzerland
Prior art keywords
hydrazine
guanyl
alkyl
hydrazine derivatives
preparation
Prior art date
Application number
CH596064A
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German (de)
Inventor
Ernst Dr Jucker
John Dr Gmuender
Original Assignee
Sandoz Ag
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Filing date
Publication date
Application filed by Sandoz Ag filed Critical Sandoz Ag
Priority to CH596064A priority Critical patent/CH441310A/en
Publication of CH441310A publication Critical patent/CH441310A/en

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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D211/00Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings
    • C07D211/04Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D211/06Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members
    • C07D211/36Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no 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
    • C07D211/56Nitrogen atoms
    • C07D211/58Nitrogen atoms attached in position 4

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Hydrogenated Pyridines (AREA)

Description

  

  



  Verfahren zur Herstellung von neuen heterocyclischen   Guanyl-hydrazin-Derivaten   
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung von neuen heterocyclischen Guanyl-hydrazin-Derivaten der Formel Ia bzw.   Ib,   
EMI1.1     
 worin   R,    eine niedere Alkyl-oder Aralkylgruppe oder ein durch zwei niedere Alkylgruppen substituiertes Stickstoffatom bedeutet.



   Erfindungsgemäss gelangt man zu den neuen Verbindungen, indem man   Hydrazin-Derivate    der Formel II
EMI1.2     
 mit Verbindungen der Formel III,
EMI1.3     
 worin entweder   R,    Wasserstoff und Z einen bei der Reaktion zusammen mit einem Wasserstoffatom des Hydrazinderivats abspaltbaren Rest bedeuten oder   R2    und Z zusammen für eine dritte Bindung zwischen dem Kohlenstoff-und dem Stickstoffatom stehen, umsetzt.



   In den Formeln la bzw. Ib und II kann Ri z. B. eine Methyl-, Benzyl-oder eine   Dimethylaminogruppe    bedeuten.



   Zur   Oberfiihrung    von Verbindungen der Formel II in Verbindungen der Formel la bzw. Ib eignen sich   O-Alkyl-isoharnstoffe    oder   S-Alkyl-isothioharnstoffe,    vorzugsweise in Form ihrer Salze mit anorganischen Säuren, z. B.   O-Methyl-isoharnstoffsulfat,    O-Athyl-iso  harnstoff-sulfat, S-Methyl-isothiohamstoff-sulfat,    S-Methyl-isothioharnstoff-hydrojodid, S-Athyl-isothioharnstoff-sulfat usw. Anstelle der genannten   Isoharn-      stoff oder Isothioharnstoff Derivate konnen ebenso gut    Cyanamid oder dessen Salze oder auch 1-Guanyl-pyrazol verwendet werden.



   Die Ausführung des Verfahrens gestaltet sich beispielsweise wie folgt :
Man versetzt die wässerige Lösung eines O-Alkyl  isoharnstoff-oder      S-Alkyl-isothioharnstoff-Salzes,    wie z. B. S-Methyl-isothioharnstoff-sulfat, mit einem Hydrazin-Derivat der Formel II und erhitzt das Reaktionsgemisch mehrere Stunden zum Sieden. Die erhaltenen Endprodukte werden entweder als Basen oder in Form ihrer Salze nach bekannten Methoden isoliert und gereinigt.



   Die nach dem vorliegenden Verfahren hergestellten, bisher unbekannten heterocyclischen Guanyl-hydrazin-Derivate besitzen-als freie Basen oder in Form ihrer Salze-wertvolle pharmakodynamische Eigenschaften. So wirken sie beispielsweise bei geringer Toxizität auf das vegetative Nervensystem und regulieren den Kreislauf.



   Darüberhinaus können die nach dem vorliegenden Verfahren hergestellten neuen Verbindungen auch als Zwischenprodukte für die Herstellung von Medikamenten verwendet werden.



   Die neuen Verbindungen können als Arzneimittel allein oder in entsprechenden Arzneiformen für enterale oder parenterale Verabreichung verwendet werden.



   Die als Ausgangsprodukte verwendeten Hydrazin Derivate der Formel II sind neu, sofern   Ri    eine Dial  kylaminogruppe    bedeutet. Sie können z. B. hergestellt werden, indem man ein l-Dialkylamino-piperidon- (4) mit einem Acylhydrazin zum acylierten Piperidyliden (4)-hydrazin-Derivat kondensiert, dieses mit einem Alkalimetallhydrid oder mit katalytisch erregtem Was serstoff zum entsprechenden acylierten Piperidyl (4)-hydrazin-Derivat reduziert und daraus den Acylrest, z.   B. durch    Erhitzen mit wässriger Salzsäure, ab spaltet.



   In den nachfolgenden Beispielen erfolgen alle Temperaturangaben in Celsiusgraden.



   Beispiel 1
1-   Methyl-piperidyl-(4')]-2-guanyl-hydrazin bzw.   



      I- 1'-Methyl-piperidyl- (4')]-1-guanyl-hydrazin.   



     13,    9 g   S-Methyl-isothioharnstoff-sulfat    werden unter leichtem Erwärmen in 50 ccm Wasser gelöst. Die erkaltete klare Lösung wird sodann mit 12,9 g   1-Methyl-piperidyl-    (4)-hydr in versetzt, und das Reaktionsgemisch 8 Stunden im   ) lbad    von   100     erhitzt, wobei Methyl-mercaptan abgespalten wird. Der nach Abdampfen des Wassers erhaltene Rückstand wird in 10 ccm heissem Wasser gelöst und die klare Lösung bis zur beginnenden Trübung mit Methanol (ca. 10 ccm) versetzt.

   Das ausgefallene   1- (1'-Methyl-      pipendyl- (43]-2-guanyl-hydfazin-sulfat bzw. l- [l'-Meth-      yl-piperidyl-    (4') 1-1-guanyl-hydrazin-sulfat wird aus Was  ser/Methanol    kristallisier ; Smp. 319  (Zers.).



   Beispiel 2    l- (l-BenzyI-piperidyl-4)-2-guanyl-hydrazin,bzw.



   1- (1-Benzyl-piperidyl4)-1-guanyl-hydr in.   



   13,6 g S-Methyl-isothiohamstoff-sulfat und 10,0 g   1-Benzyl-piperidyl4-hydrazin    werden in 50 ccm Wasser 9 Stunden am Rückfluss erhitzt, wobei Methylmercaptan abgespalten wird. Man versetzt die Reaktionslösung anschliessend mit 50 ccm Äthanol und trennt das ausgefallene Produkt ab. Zur weitem Reinigung wird das   1- (1-Benzyl-piperidyl-4)-2-guanyl-hydrazin-    sulfat, bzw.   1-(1-Benzyl-piperidyl-4)-1-guanyl-hydra-      zin-sulfat    aus Wasser/Äthanol umkristallisiert. Smp.



     309-311     (Zers.).



   Beispiel 3    1- [1'-Dìmethylamino-piperidyl-(48)]-2-guanyl-hydrazin    bzw.   



   1- [1'-Dimethylamino-piperidyl (4') -1-guan, yl-hydrazin.   



   Die Lösung von 13,8 g S-Methyl-isothioharnstoffsulfat und 7,8 g   1-Dimethylamino-piperidyl- (4)-hydra-    zin in 50 ccm Wasser wird 14 Stunden am Rückfluss zum Sieden erhitzt und anschliessend eingeengt. Man nimmt den Rückstand in 20 ccm Methanol auf, trennt von wenig unlöslichem S-Methyl-isothioharnstoff-sulfat ab und lässt das Filtrat nach Zusatz von weiteren 50 ccm Methanol so lange stehen, bis Kristallisation eintritt. Das ausgefallene   1- [1'-Dimethylamino-piperi-      dyl- (4')]-2-guanyl-hydrazin-sulfat    bzw.   1- [1'-Dimethyl-      amino-piperidyl-    (4')]-1-guanyl-hydrazinsulfat wird anschliessend aus Wasser/Athanol kristallisiert ; Smp.



     288     (Zers.).



   Das als Ausgangsmaterial verwendete   1-DimethyI-      amino-piperidyl- (4)-hydrazin    wird wie folgt hergestellt : 15,5 g   I-Dimethylamino-piperidon- (4) werden    mit 8,1 g Acetylhydrazin 12 Stunden bei einer   Badtempe-    ratur von 80  am Rückfluss erhitzt. Man destilliert anschliessend im Vakuum, wobei unter einem Druck von 0,07 mm Hg das   N-Acetyl-N2-[1'-dimethylami-      no-piperidyliden- (4')]-hydrazin    bei einer Temperatur von   164  übergeht.    Die Verbindung kristallisiert beim Stehen ; Smp.   129 .   



   Das erhaltene Piperidyliden-hydrazin wird sodann in 20 ccm Äthanol mit Platinoxyd hydriert. Nachdem die berechnete Menge Wasserstoff aufgenommen worden ist, wird vom Katalysator abfiltriert, das Lösungs mittel bei einem Druck von   15 mm    Hg entfernt, und der Rückstand bei 0,01 mm Hg destilliert, wobei das   Ni-Acetyl-N2- [1'-dimethylamino-piperidyl- (4]-hydrazin    zwischen 160 und   165  als    sehr   dickflüssiges      bl    übergeht.



   Zur Abspaltung der Acetylgruppe verfährt man in der Weise, dass man 2,0 g des erhaltenen acetylierten Hydrazins in 20 ccm 24-proz. Salzsäure 5 Stunden am Riickfluss erhitzt. Nach Eindampfen der   Reaktionslö-    sung zur Trockne versetzt man den Rückstand unter guter Eiskühlung mit   5 ccm 50-proz.    Kalilauge und anschliessend mit festem Kaliumhydroxyd im   tuber-    schuss und extrahiert darauf erschöpfend mit Äther.



  Aus den vereinigten   Ätherlösungen    wird das Lösungsmittel entfernt und der Rückstand bei 14 mm Hg frak  tioniert,    wobei das   1-Dimethylsm ; no-piperidyl-(4)-hydr-    azin zwischen 135 ud   140  übergeht.    Dimaleinat : Smp.



  



  Process for the preparation of new heterocyclic guanyl hydrazine derivatives
The present invention relates to a process for the preparation of new heterocyclic guanyl hydrazine derivatives of the formula Ia or Ib,
EMI1.1
 wherein R, denotes a lower alkyl or aralkyl group or a nitrogen atom substituted by two lower alkyl groups.



   According to the invention, the new compounds are obtained by adding hydrazine derivatives of the formula II
EMI1.2
 with compounds of the formula III,
EMI1.3
 in which either R, hydrogen and Z denote a radical which can be split off during the reaction together with a hydrogen atom of the hydrazine derivative or R2 and Z together represent a third bond between the carbon and the nitrogen atom.



   In the formulas la or Ib and II, Ri can, for. B. mean a methyl, benzyl or a dimethylamino group.



   O-alkyl-isoureas or S-alkyl-isothioureas are suitable for converting compounds of formula II into compounds of formula la or Ib, preferably in the form of their salts with inorganic acids, e.g. B. O-methyl isourea sulfate, O-ethyl iso urea sulfate, S-methyl isothiourea sulfate, S-methyl isothiourea hydroiodide, S-ethyl isothiourea sulfate, etc. Instead of the mentioned isourea or isothiourea Derivatives, cyanamide or its salts, or 1-guanyl-pyrazole can just as easily be used.



   The procedure is carried out, for example, as follows:
The aqueous solution of an O-alkyl isourea or S-alkyl isothiourea salt, such as. B. S-methyl isothiourea sulfate, with a hydrazine derivative of the formula II and the reaction mixture is heated to the boil for several hours. The end products obtained are isolated and purified either as bases or in the form of their salts by known methods.



   The previously unknown heterocyclic guanyl hydrazine derivatives prepared by the present process have valuable pharmacodynamic properties, as free bases or in the form of their salts. For example, with low toxicity, they act on the vegetative nervous system and regulate the circulation.



   In addition, the new compounds produced by the present process can also be used as intermediates for the production of medicaments.



   The new compounds can be used as medicaments alone or in corresponding medicament forms for enteral or parenteral administration.



   The hydrazine derivatives of the formula II used as starting materials are new, provided that Ri is a dialkylamino group. You can e.g. B. be prepared by condensing a l-dialkylamino-piperidone (4) with an acylhydrazine to the acylated piperidylidene (4) hydrazine derivative, this with an alkali metal hydride or with catalytically excited hydrogen to the corresponding acylated piperidyl (4) - hydrazine derivative reduced and from it the acyl radical, z. B. by heating with aqueous hydrochloric acid, splits off.



   In the following examples, all temperatures are given in degrees Celsius.



   example 1
1- methyl-piperidyl- (4 ')] - 2-guanyl-hydrazine or



      I-1'-methyl-piperidyl- (4 ')] -1-guanyl-hydrazine.



     13.9 g of S-methyl isothiourea sulfate are dissolved in 50 cc of water with gentle heating. The cooled, clear solution is then mixed with 12.9 g of 1-methyl-piperidyl- (4) -hydr in, and the reaction mixture is heated for 8 hours in a 100% bath, with methyl mercaptan being split off. The residue obtained after evaporation of the water is dissolved in 10 cc of hot water and methanol (approx. 10 cc) is added to the clear solution until it begins to cloud.

   The precipitated 1- (1'-methyl-pipendyl- (43] -2-guanyl-hydrazine-sulfate or 1- [l'-methyl-piperidyl- (4 ') 1-1-guanyl-hydrazine-sulfate is crystallized from water / methanol; m.p. 319 (decomp.).



   Example 2 l- (l-BenzyI-piperidyl-4) -2-guanyl-hydrazine, or.



   1- (1-Benzyl-piperidyl4) -1-guanyl-hydr in.



   13.6 g of S-methyl isothiourea sulfate and 10.0 g of 1-benzyl-piperidyl4-hydrazine are refluxed in 50 cc of water for 9 hours, with methyl mercaptan being split off. The reaction solution is then mixed with 50 cc of ethanol and the precipitated product is separated off. For further purification, 1- (1-benzyl-piperidyl-4) -2-guanyl-hydrazine sulfate, or 1- (1-benzyl-piperidyl-4) -1-guanyl-hydrazine sulfate, is extracted from water / Ethanol recrystallized. M.p.



     309-311 (dec.).



   Example 3 1- [1'-Dìmethylamino-piperidyl- (48)] - 2-guanyl-hydrazine or



   1- [1'-Dimethylamino-piperidyl (4 ') -1-guan, yl-hydrazine.



   The solution of 13.8 g of S-methyl isothiourea sulfate and 7.8 g of 1-dimethylaminopiperidyl- (4) -hydrazine in 50 cc of water is refluxed for 14 hours and then concentrated. The residue is taken up in 20 cc of methanol, separated from slightly insoluble S-methyl isothiourea sulfate and, after the addition of a further 50 cc of methanol, the filtrate is left to stand until crystallization occurs. The precipitated 1- [1'-dimethylamino-piperidyl- (4 ')] -2-guanyl-hydrazine-sulfate or 1- [1'-dimethylamino-piperidyl- (4')] -1-guanyl hydrazine sulfate is then crystallized from water / ethanol; M.p.



     288 (dec.).



   The 1-dimethylamino-piperidyl- (4) -hydrazine used as starting material is prepared as follows: 15.5 g of I-dimethylamino-piperidone- (4) are mixed with 8.1 g of acetylhydrazine for 12 hours at a bath temperature of 80 heated to reflux. It is then distilled in vacuo, the N-acetyl-N2- [1'-dimethylamino-piperidylidene- (4 ')] hydrazine passing over at a temperature of 164 under a pressure of 0.07 mm Hg. The compound crystallizes on standing; M.p. 129.



   The piperidylidene hydrazine obtained is then hydrogenated in 20 cc of ethanol with platinum oxide. After the calculated amount of hydrogen has been absorbed, the catalyst is filtered off, the solvent is removed at a pressure of 15 mm Hg, and the residue is distilled at 0.01 mm Hg, the Ni-acetyl-N2- [1'-dimethylamino -piperidyl- (4] -hydrazine between 160 and 165 turns into a very viscous bl.



   To split off the acetyl group, the procedure is such that 2.0 g of the acetylated hydrazine obtained are dissolved in 20 ccm of 24 percent strength. Hydrochloric acid heated under reflux for 5 hours. After the reaction solution has been evaporated to dryness, 5 cc of 50 percent strength are added to the residue with good ice cooling. Potash lye and then with solid potassium hydroxide in excess and then extracted exhaustively with ether.



  The solvent is removed from the combined ether solutions and the residue is fractionated at 14 mm Hg, the 1-dimethylsm; no-piperidyl- (4) -hydrazine passes between 135 and 140. Dimaleinate: m.p.

 

Claims (1)

143-144 nach Umkrisìallirtion aus AthanoL PATENTANSPRUCH Verfahren zur Herstellung von neuen heterocyclischen Guanyl-hydrazin-Derivaten der Formel Ia bzw. 143-144 after Umkrisìallirtion from AthanoL PATENT CLAIM Process for the preparation of new heterocyclic guanyl hydrazine derivatives of the formula Ia or Ib, EMI2.1 worin Rt eine niedere Alkyl-oder Aralkylgruppe oder ein durch zwei niedere Alkylgruppen substituiertes Stickstoffatom bedeutet, dadurch gekennzeichnet, dass man Hydrazin-Derivate der Formel II EMI2.2 mit Verbindungen der Formel III, EMI2.3 worin entweder R2 Wasserstoff und Z einen bei der Reaktion zusammen mit einem Wasserstoffatom des Hydrazinderivats abspaltbaren Rest bedeuten oder R2 und Z zusammen für eine dritte Bindung zwischen dem Kohlenstoff-und dem Stickstoffatom stehen, umsetzt. Ib, EMI2.1 where Rt is a lower alkyl or aralkyl group or a nitrogen atom substituted by two lower alkyl groups, characterized in that hydrazine derivatives of the formula II EMI2.2 with compounds of the formula III, EMI2.3 in which either R2 is hydrogen and Z is a radical which can be split off during the reaction together with a hydrogen atom of the hydrazine derivative or R2 and Z together represent a third bond between the carbon and the nitrogen atom. UNTERANSPRÜCHE 1. Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man als Verbindung der Formel III einen O-Alkyl-isoharnstoff, einen S-Alkyl-isothioharnstoff, I-Guanylpyrazol oder Cyanamid verwendet. SUBClaims 1. Process according to claim, characterized in that an O-alkyl-isourea, an S-alkyl-isothiourea, I-guanylpyrazole or cyanamide is used as the compound of the formula III. 2. Verfahren nach Patentanspruch und nach Unter anspruch 1, dadurch gekennzeichnet, dass man den O-Alkyl-isoharnstoff, den S-Alkyl-isoharnstoff bzw. das Cyanamid in Form eines Salzes mit einer anorganischen Säure einsetzt. 2. The method according to claim and sub-claim 1, characterized in that the O-alkyl-isourea, the S-alkyl-isourea or the cyanamide is used in the form of a salt with an inorganic acid.
CH596064A 1964-05-06 1964-05-06 Process for the preparation of new heterocyclic guanyl hydrazine derivatives CH441310A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0325936A2 (en) * 1988-01-16 1989-08-02 Ono Pharmaceutical Co., Ltd. Aminoguanidine derivatives and inhibitory agents on maillard reaction containing them as active ingredients
US6179881B1 (en) * 1997-11-21 2001-01-30 L'oreal Compositions and processes for dyeing keratin fibers with azo compounds

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0325936A2 (en) * 1988-01-16 1989-08-02 Ono Pharmaceutical Co., Ltd. Aminoguanidine derivatives and inhibitory agents on maillard reaction containing them as active ingredients
EP0325936A3 (en) * 1988-01-16 1990-01-17 Ono Pharmaceutical Co., Ltd. Aminoguanidine derivatives and inhibitory agents on maillard reaction containing them as active ingredients
US6179881B1 (en) * 1997-11-21 2001-01-30 L'oreal Compositions and processes for dyeing keratin fibers with azo compounds

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