CH320575A - Process for the preparation of isonicotinic acid derivatives - Google Patents

Process for the preparation of isonicotinic acid derivatives

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Publication number
CH320575A
CH320575A CH320575DA CH320575A CH 320575 A CH320575 A CH 320575A CH 320575D A CH320575D A CH 320575DA CH 320575 A CH320575 A CH 320575A
Authority
CH
Switzerland
Prior art keywords
sep
hydrazine
isonicotinyl
isonicotinic acid
preparation
Prior art date
Application number
Other languages
German (de)
Inventor
Herbert Fox Herman
Original Assignee
Hoffmann La Roche
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 Hoffmann La Roche filed Critical Hoffmann La Roche
Publication of CH320575A publication Critical patent/CH320575A/en

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Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D213/00Heterocyclic 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
    • C07D213/02Heterocyclic 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
    • C07D213/04Heterocyclic 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
    • C07D213/60Heterocyclic 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
    • C07D213/78Carbon atoms having three bonds to hetero atoms, with at the most one bond to halogen, e.g. ester or nitrile radicals
    • C07D213/86Hydrazides; Thio or imino analogues thereof

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Pyridine Compounds (AREA)

Description

  

  Verfahren zur Herstellung von     Isonicotinsäurederivaten       Die     @-orliegende    Erfindung betrifft ein  Verfahren zur Herstellung von     neuen-        Isonico-          tinsäurederiv        aten,    welches dadurch gekenn  zeichnet ist, dass ein     Isonicotinsäurehalogenid     mit einem     substituierten        Hydrazin    der Formel       RlNI-I-NR2R3,    worin     R3    eine     Alkyl-,

          Alke-          nyl-    oder     Aralkylgruppe    und     R1    und R2 Was  serstoff oder eine     Alkyl-,        Alkenyl-    oder     Aral-          kylgruppe    bedeuten, umgesetzt wird.  



  An Stelle der     Isonicotinsäurehalogenide     kann man auch     Hydrohalogenide    derselben  verwenden.  
EMI0001.0023     
  
    Als <SEP> Ausgangsmaterial <SEP> können <SEP> zum <SEP> Beispiel
<tb>  folgende <SEP> substituierten <SEP> Hydrazine <SEP> verwendet
<tb>  werden <SEP> : <SEP> lIethylhydrazin, <SEP> Äthylhydrazin, <SEP> Pro  pvjhydrazin, <SEP> Isopropylhydrazin, <SEP> Allylhydra  zin, <SEP> Benzylhydrazin, <SEP> Ni,Ni-Dimethyl-hydra  zin, <SEP> Ni,Nl-Diäthyl-hydrazin, <SEP> Ni,N1-Diallyl  hydrazin, <SEP> Nr,N2-Dimetliyl-hydrazin, <SEP> Nr,N2-Di  äthyl-hydrazin, <SEP> Ni,N2-Diisopropyl-hydrazin,
<tb>  Ni,N <SEP> 2-Dibenzy <SEP> l-hydrazin, <SEP> N1,N2,N2-Trimethyl  hydrazin.
<tb>  



  Bei <SEP> Verwendung <SEP> eines <SEP> monosubstituier  ten <SEP> Hydrazins <SEP> erhält <SEP> man <SEP> gewöhnlich <SEP> ein
<tb>  Ni-isonicotinyl-Ni-substituiertes <SEP> Hydrazin.
<tb>  Bei <SEP> Verwendung <SEP> eines <SEP> N1,Ni-disubstituierten
<tb>  Hydrazins <SEP> entsteht <SEP> ein <SEP> Nl-isonieotinyl-N2,N2  disubstituiertes <SEP> Hydrazin, <SEP> bei <SEP> Verwendung
<tb>  eines <SEP> N1,h,T2-disubstituierten <SEP> Hydrazins <SEP> ein
<tb>  N <SEP> 1-isonieotinyl-N1,N2-disubstituiertes <SEP> Hydra  zin <SEP> und <SEP> bei <SEP> Verwendung <SEP> -eines <SEP> N1,N2,N2-tri-       substituierten Hydrazins ein     Nl-isonicotinyl-          Ni,N2,N2-trisubstituiertes        Hydrazin.     



  Die nach dem erfindungsgemässen Verfah  ren erhältlichen Kondensationsprodukte lassen  sich formelmässig wie folgt darstellen:  
EMI0001.0027     
    wobei R" und R"' ein Wasserstoffatom oder  eine     Alkyl-,        Allienyl-    oder     Aralkylgruppe    be  deuten und R' eine     Alkyl-,        Alkenyl-    oder       Aralkylgruppe    oder, sofern der eine der bei  den     Substituenten    R" und R"' Wasserstoff  und der andere eine     Alkyl-,        Alkenyl-    oder       Aralkylgruppe    ist,     gegebenenfalls    auch ein  Wasserstoffatom bezeichnet.  



  Diese Verfahrensprodukte bilden sehr  leicht Salze, wenn man sie mit Säuren, bei  spielsweise mit Salzsäure, Bromwasserstoff  säure, Salpetersäure, Schwefelsäure, Phos  phorsäure, Weinsäure,     Ozalsäure    und ähn  lichen Säuren zur     Reaktion        bringt.     



  Beispiele von Verbindungen, die gemäss  vorliegender Erfindung hergestellt werden  können, sind       Ni-Isonicotin-\Tl-Nl-meth-#Tl-hydrazin,          Ni-Isonicotiny        l-Nl-äthyl-hydrazin,          NI-Isonicotiny        1-Nl-propyl-hydrazin,          Ni-Isonicotinvl-l\Ti-isopropyl-hvdrazin,          Ni-Isonieotiny        1-Nl-benzyl-liydrazin,          Ni-Isonicotinyl-N1-allyl-liydrazin,          Nl-Isonieotinyl-Ni,N2-cliniethyl-Ilydrazin,       
EMI0002.0001     
  
    NI-Isonicotiny <SEP> 1-NI,N2-diäthyl-hy <SEP> drazin,
<tb>  NI-Isonieotiny <SEP> l-NI,N2-diisopropyl-hydrazin,

  
<tb>  Nl-Isonicotinv1-NI,N2-dibenzyl-hydrazin,
<tb>  NI-Isonicotinyl-I\TI,N2-diallyl-hydrazin,
<tb>  Nl-Isonicotinyl-NI,I\T2,N2-trimethyl-hydrazin,
<tb>  N <SEP> l-Isonicotinyl-Nl-äthyl-N2,N2-dimethyl  hydrazin,
<tb>  N <SEP> I-Isonicotinyl-\TI-propy <SEP> 1-N2,N2-dimethyl  hydrazin,
<tb>  NI-Isonicotiny <SEP> 1-Nl-isopropyl-I\T2,N2-dimethyl  hydrazin,
<tb>  NI-Isonicotinyl-Nl-n-buty <SEP> 1-N2,N2-dimethyl  hydrazin,
<tb>  NI-Isonicotinyl-NI-benzyl-N2,N2-dimetliyl  hydrazin,
<tb>  NI-Isonicotinyl-Nl-allyl-1\T2,N2-dimethyl  hydrazin,
<tb>  NI-Isonicotiny <SEP> 1-Nl-methyl-N2,N2-diäthyl  hydrazin,
<tb>  Nl-Isonicotiny <SEP> 1-N <SEP> I,N2,N2-tr <SEP> iäthyl-hydrazin,
<tb>  N <SEP> I-Isonieotinyl-NI-isopropyl-\T2,N=-diäthy <SEP> l  hydrazin,
<tb>  Nl-Isonigotinyl-Nl-benZyl-N2,N2-diäthyl  hydrazin,
<tb>  NI-Isonicotinyl-Nl-allyl-N <SEP> 2,N2-diäthyl  hydrazin,

  
<tb>  NI-Isonicotinyl-NI-methyl-N2,N2-diallyl  hydrazin,
<tb>  NI-Isonicotinyl-hTl-äthyl-N2,N2-diallyl  hydrazin,
<tb>  NI-Isonigotinyl-h,Tl-propyl-N2,N2-diallyl  hydrazin,
<tb>  NI-Ison.icotinyl-NI-isopropy <SEP> 1-N2,N2-diallyl  hydrazin,
<tb>  NI-Isonicotinyl-Nl-benzyl-N <SEP> 2,N2-diallyl  hydrazin,
<tb>  N <SEP> I-Isonicotinil-NI;N2,N2-triallyl-hydrazin,
<tb>  \TI-Isonicotinyl-I\TI-methyl-I\TZ,N2-dibenzyl  hydrazin.
<tb>  



  Diese <SEP> Verbindungen <SEP> besitzen <SEP> bemerkens  werte <SEP> chemotherapeutische <SEP> Eigenschaften <SEP> und
<tb>  können <SEP> als <SEP> Heilmittel, <SEP> vor <SEP> allem <SEP> in <SEP> der <SEP> Tuber  kulosebekämpf-ung, <SEP> verwendet <SEP> werden.
<tb>  



  <I>Beispiel <SEP> 1</I>
<tb>  <I>?V <SEP> l-Isonico <SEP> ti-7tyl-NI <SEP> ,N2-cliiso <SEP> p <SEP> ro <SEP> p <SEP> yl-jtydraziit</I>
<tb>  Ein <SEP> Gemisch <SEP> von <SEP> 50 <SEP> Volumteilen <SEP> Pyridin
<tb>  und <SEP> 8,5 <SEP> Gewichtsteilen <SEP> NI,N2-Diisopropyl-            hydrazin        wird    mit 10,2 Gewichtsteilen     Isonico-          tinsäureehlorid-hydrochlorid    versetzt. Die Mi  schung     erwärmt    sieh spontan. Man hält eine  halbe Stunde auf dem Wasserbad, so dass  vollständige Auflösung eintritt. Die Mischung  wird sodann gekühlt und mit überschüssigem  konzentriertem     Ammoniumhydroxyd    behan  delt.

   Das Lösungsmittel wird im Vakuum ent  fernt und der kristallisierte Rückstand mit  Chloroform extrahiert. Das Chloroform lässt  man auf dem Wasserbad verdampfen, und  man löst das zurückgebliebene Öl, welches  aus     NI        -Isonicotinyl-Nl,N2-diisopropyl-hydra-          zin    besteht, in Äther auf. Die ätherische Lö  sung     wird    getrocknet,     filtriert    und mit-     trok-          kenem        Chlonv        asserstoff    versetzt.

   Nach Um  kristallisieren aus Essigester schmilzt das ab  geschiedene     NI-Isonicotiriyl-NI,N2-diisopropy        l-          hydrazin-monohydroclilorid    bei     155-156,50    C;  es bildet farblose Prismen.  



  <I>Beispiel 2</I>       NI-Isoiticotig,ayl-Nl,N2-dibcii.zyl-hydraziit     Eine Lösung von 16 Gewichtsteilen     NI,N2-          Dibenzyl-hy        drazin    in 100     Volumteilen        Pyri-          din    wird mit. 14     Gewichtsteilen        Isonicotin-          säureehlorid-hydrochlorid    versetzt. Die     hZi-          sehung    erwärmt sieh spontan.

   Man hält eine  halbe     Stunde    auf dem Wasserbad, entfernt  sodann das     Pyridin    im     Valium    und löst den  aus     NI-Isonicotinyl-NI,N2-dibenzyl-hydrazin     bestehenden Rückstand in 500     Volumteilen          Isopropanol    auf.

   Bei der Behandlung der ent  standenen Lösung mit     äthanolischer    Salzsäure  im Überschuss scheidet sich das     NI-Isonico-          tinyl-l-N        I,N2-dibenzy        1-hydrazin-monohydrochlo-          rid    ab.     -Nach    dem     Umkristallisieren    in     0,2n-          Salzsäure    erhält man dieses Produkt in Form  von gelben Nadeln, die bei     234-239     C unter       Zersetzung        schmelzen.     



       Beispiel   <I>3</I>       NI-Isoaticotinyl-Nl-n-bzttyl-N2,N2-diyitethyl-          hydrazin     Eine Lösung von 36     Gewichtsteilen        Iso-          uieotinsäureehlorid-hydroelilorid    in 150     Vo-          lumteilen        Pyridin    wird unter Rühren     por-          tionsweise    mit 18 Gewichtsteilen NI,NI-Di-           methyl-hydrazin    versetzt. Die Reaktionsmi  schung erwärmt sich spontan, und es entsteht  eine dunkelbraune Lösung.

   Das     Pyridin    wird  im Vakuum entfernt und der Rückstand  mit einer gesättigten     Kaliumcarbonatlösung     schwach alkalisch gestellt. Die Mischung wird  sodann mehrere Male mit Chloroform extra  hiert, und die     vereinigten        Chloroformauszüge     werden zur Trockne eingedampft. Der kristal  lisierte Rückstand liefert nach dem     Umkristal-          lisieren    in Benzol grosse farblose, spitze Pris  men von     hTi    -     Isonicotinyl    -     N2,N2    -     dimethyl-          hydrazin    vom     Schmelzpunkt    120-121  C.

      <I>Beispiel 4</I>       Nl-Isoizicotin        yl-N2,N2-diäthyl-hydrazin     35,6 Gewichtsteile     Isonicotinsäurechlorid-          hydrochlorid,    150     Volumteile        Pyridin    und 17,6  Gewichtsteile     NI,NI-Diäthyl-hydrazin    werden  nach dem im ersten Absatz von Beispiel 3 be-         schriebenen    Verfahren miteinander umgesetzt.  Der nach dem Entfernen des Chloroforms aus  den     Chloroformauszügen    zurückgebliebene  ölige Rückstand wird in heissem Benzol gelöst  und mittels Aktivkohle entfärbt.

   Beim Küh  len scheiden sich farblose Prismen von     Nl-Iso-          nicotinyl-1\T2,N2-diäthyl-hydrazin    vom Schmelz  punkt     89,5-90,5     C ab.



  Process for the production of isonicotinic acid derivatives The present invention relates to a process for the production of new isonicotinic acid derivatives, which is characterized in that an isonicotinic acid halide with a substituted hydrazine of the formula RINI-I-NR2R3, in which R3 is an alkyl,

          Alkenyl or aralkyl group and R1 and R2 are hydrogen or an alkyl, alkenyl or aralkyl group, is reacted.



  Hydrohalides of the same can also be used in place of the isonicotinic acid halides.
EMI0001.0023
  
    <SEP> for the <SEP> example can be used as <SEP> starting material <SEP>
<tb> the following <SEP> substituted <SEP> hydrazines <SEP> are used
<tb> are <SEP>: <SEP> ethyl hydrazine, <SEP> ethyl hydrazine, <SEP> propyl hydrazine, <SEP> isopropyl hydrazine, <SEP> allyl hydrazine, <SEP> benzyl hydrazine, <SEP> Ni, Ni-dimethyl-hydra Zin, <SEP> Ni, Nl-diethyl hydrazine, <SEP> Ni, N1-diallyl hydrazine, <SEP> Nr, N2-Dimethyl hydrazine, <SEP> Nr, N2-diethyl hydrazine, <SEP> Ni , N2-diisopropylhydrazine,
<tb> Ni, N <SEP> 2-dibenzy <SEP> l-hydrazine, <SEP> N1, N2, N2-trimethyl hydrazine.
<tb>



  If <SEP> is used <SEP> a <SEP> monosubstituted <SEP> hydrazine <SEP> <SEP> one usually gets <SEP> <SEP>
<tb> Ni-isonicotinyl-Ni-substituted <SEP> hydrazine.
<tb> When using <SEP> <SEP> a <SEP> N1, Ni-disubstituted
<tb> Hydrazine <SEP> results in <SEP> a <SEP> Nl-isonieotinyl-N2, N2 disubstituted <SEP> hydrazine, <SEP> when <SEP> is used
<tb> of a <SEP> N1, h, T2-disubstituted <SEP> hydrazine <SEP> a
<tb> N <SEP> 1-isonieotinyl-N1, N2-disubstituted <SEP> hydrazine <SEP> and <SEP> when <SEP> is used <SEP> -a <SEP> N1, N2, N2-tri-substituted Hydrazine is a Nl-isonicotinyl-Ni, N2, N2-trisubstituted hydrazine.



  The condensation products obtainable by the process according to the invention can be represented in terms of formulas as follows:
EMI0001.0027
    where R "and R" 'are a hydrogen atom or an alkyl, allienyl or aralkyl group and R' is an alkyl, alkenyl or aralkyl group or, if one of the substituents R "and R" 'is hydrogen and the other is an alkyl, alkenyl or aralkyl group, optionally also denotes a hydrogen atom.



  These process products form salts very easily when they are reacted with acids, for example with hydrochloric acid, hydrobromic acid, nitric acid, sulfuric acid, phosphoric acid, tartaric acid, ozalic acid and similar acids.



  Examples of compounds which can be prepared according to the present invention are Ni-isonicotin- \ Tl-Nl-meth- # Tl-hydrazine, Ni-isonicotiny 1-Nl-ethyl hydrazine, NI-isonicotiny 1-Nl-propyl hydrazine , Ni-Isonicotinvl-l \ Ti-isopropyl-hvdrazine, Ni-Isonieotiny 1-Nl-benzyl-liydrazine, Ni-isonicotinyl-N1-allyl-liydrazine, Nl-isonieotinyl-Ni, N2-cliniethyl-ilydrazine,
EMI0002.0001
  
    NI-Isonicotiny <SEP> 1-NI, N2-diethyl-hy <SEP> drazin,
<tb> NI-Isonieotiny <SEP> l-NI, N2-diisopropyl-hydrazine,

  
<tb> Nl-Isonicotinv1-NI, N2-dibenzyl-hydrazine,
<tb> NI-Isonicotinyl-I \ TI, N2-diallyl-hydrazine,
<tb> Nl-Isonicotinyl-NI, I \ T2, N2-trimethyl-hydrazine,
<tb> N <SEP> l-isonicotinyl-Nl-ethyl-N2, N2-dimethyl hydrazine,
<tb> N <SEP> I-isonicotinyl- \ TI-propy <SEP> 1-N2, N2-dimethyl hydrazine,
<tb> NI-Isonicotiny <SEP> 1-Nl-isopropyl-I \ T2, N2-dimethyl hydrazine,
<tb> NI-Isonicotinyl-Nl-n-buty <SEP> 1-N2, N2-dimethyl hydrazine,
<tb> NI-Isonicotinyl-NI-benzyl-N2, N2-dimetliyl hydrazine,
<tb> NI-isonicotinyl-Nl-allyl-1 \ T2, N2-dimethyl hydrazine,
<tb> NI-Isonicotiny <SEP> 1-Nl-methyl-N2, N2-diethyl hydrazine,
<tb> Nl-Isonicotiny <SEP> 1-N <SEP> I, N2, N2-tr <SEP> iäthylhydrazine,
<tb> N <SEP> I-isonieotinyl-NI-isopropyl- \ T2, N = -diäthy <SEP> l hydrazine,
<tb> Nl-Isonigotinyl-Nl-benzyl-N2, N2-diethyl hydrazine,
<tb> NI-Isonicotinyl-Nl-allyl-N <SEP> 2, N2-diethyl hydrazine,

  
<tb> NI-Isonicotinyl-NI-methyl-N2, N2-diallyl hydrazine,
<tb> NI-isonicotinyl-hTl-ethyl-N2, N2-diallyl hydrazine,
<tb> NI-isonigotinyl-h, Tl-propyl-N2, N2-diallyl hydrazine,
<tb> NI-Ison.icotinyl-NI-isopropy <SEP> 1-N2, N2-diallyl hydrazine,
<tb> NI-Isonicotinyl-Nl-benzyl-N <SEP> 2, N2-diallyl hydrazine,
<tb> N <SEP> I-isonicotinil-NI; N2, N2-triallyl-hydrazine,
<tb> \ TI-Isonicotinyl-I \ TI-methyl-I \ TZ, N2-dibenzyl hydrazine.
<tb>



  These <SEP> compounds <SEP> have <SEP> remarkable <SEP> chemotherapeutic <SEP> properties <SEP> and
<tb> <SEP> can be used as <SEP> remedy, <SEP> before <SEP> everything <SEP> in <SEP> of <SEP> tuberculosis control, <SEP> <SEP>
<tb>



  <I> Example <SEP> 1 </I>
<tb> <I>? V <SEP> l-Isonico <SEP> ti-7tyl-NI <SEP>, N2-cliiso <SEP> p <SEP> ro <SEP> p <SEP> yl-jtydraziit </ I >
<tb> A <SEP> mixture <SEP> of <SEP> 50 <SEP> parts by volume <SEP> pyridine
<tb> and <SEP> 8.5 <SEP> parts by weight <SEP> NI, N2-diisopropylhydrazine are mixed with 10.2 parts by weight isonicotinic acid chloride hydrochloride. The mixture warms up spontaneously. It is kept on the water bath for half an hour so that complete dissolution occurs. The mixture is then cooled and treated with excess concentrated ammonium hydroxide.

   The solvent is removed in vacuo and the crystallized residue is extracted with chloroform. The chloroform is allowed to evaporate on a water bath, and the remaining oil, which consists of NI-isonicotinyl-NI, N2-diisopropylhydrazine, is dissolved in ether. The ethereal solution is dried, filtered and mixed with dry hydrogen chloride.

   After recrystallizing from ethyl acetate, the separated NI-Isonicotiriyl-NI, N2-diisopropyl-hydrazine-monohydrochloride melts at 155-156.50 ° C .; it forms colorless prisms.



  <I> Example 2 </I> NI-Isoiticotig, ayl-NI, N2-dibcii.zyl-hydraziit A solution of 16 parts by weight NI, N2-dibenzyl-hydrazine in 100 parts by volume pyridine is with. 14 parts by weight of isonicotinic acid chloride hydrochloride are added. The vision warms up spontaneously.

   It is kept on the water bath for half an hour, then the pyridine is removed in the Valium and the residue consisting of NI-isonicotinyl-NI, N2-dibenzylhydrazine is dissolved in 500 parts by volume of isopropanol.

   When the resulting solution is treated with ethanolic hydrochloric acid in excess, the NI-isonicotinyl-1-N, N2-dibenzy-1-hydrazine monohydrochloride separates out. After recrystallization in 0.2N hydrochloric acid, this product is obtained in the form of yellow needles which melt at 234-239 ° C. with decomposition.



       Example <I> 3 </I> NI-Isoaticotinyl-Nl-n-bzttyl-N2, N2-diyitethylhydrazine. A solution of 36 parts by weight of isotinic acid chloride hydroeliloride in 150 parts by volume of pyridine is added in portions with 18 Parts by weight of NI, NI-dimethylhydrazine are added. The reaction mixture heats up spontaneously and a dark brown solution is formed.

   The pyridine is removed in vacuo and the residue is made slightly alkaline with a saturated potassium carbonate solution. The mixture is then extracted several times with chloroform and the combined chloroform extracts are evaporated to dryness. After recrystallizing in benzene, the crystallized residue yields large, colorless, pointed prisms of hTi - isonicotinyl - N2, N2 - dimethylhydrazine with a melting point of 120-121 C.

      <I> Example 4 </I> Nl-Isoizicotin yl-N2, N2-diethylhydrazine 35.6 parts by weight of isonicotinic acid chloride hydrochloride, 150 parts by volume of pyridine and 17.6 parts by weight of NI, NI diethyl hydrazine are used according to the in the first paragraph of Example 3 described methods implemented with one another. The oily residue remaining after the chloroform has been removed from the chloroform extracts is dissolved in hot benzene and decolorized with activated carbon.

   Colorless prisms of N1-isonicotinyl-1 \ T2, N2-diethylhydrazine with a melting point of 89.5-90.5 ° C separate out on cooling.

 

Claims (1)

PATENTANSPRUCH Verfahren zur Herstellung von neuen Iso- nicotinsäurederivaten, dadurch gekennzeich net, dass ein Isonicotinsäurehalogenid@oder ein Hydrohalogenid eines solchen mit einem sub stituierten Hydrazin der allgemeinen Formel R,N H NR2R3, worin R3 eine Alkyl-, Alke- nyl- oder Aralkylgruppe und R1 und R2 Was serstoff, eine Alkyl-, PATENT CLAIM Process for the preparation of new isonicotinic acid derivatives, characterized in that an isonicotinic acid halide @ or a hydrohalide of one with a substituted hydrazine of the general formula R, NH NR2R3, wherein R3 is an alkyl, alkene nyl or aralkyl group and R1 and R2 is hydrogen, an alkyl, Alkenyl- oder Aralkyl- gruppe bedeuten, umgesetzt wird. Alkenyl or aralkyl group mean, is implemented.
CH320575D 1952-03-07 1953-02-05 Process for the preparation of isonicotinic acid derivatives CH320575A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US320575XA 1952-03-07 1952-03-07

Publications (1)

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CH320575A true CH320575A (en) 1957-03-31

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CH (1) CH320575A (en)

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