CH202159A - Process for the preparation of a diphenyl series hydrazine. - Google Patents

Process for the preparation of a diphenyl series hydrazine.

Info

Publication number
CH202159A
CH202159A CH202159DA CH202159A CH 202159 A CH202159 A CH 202159A CH 202159D A CH202159D A CH 202159DA CH 202159 A CH202159 A CH 202159A
Authority
CH
Switzerland
Prior art keywords
hydrazine
parts
preparation
dichloro
diazo
Prior art date
Application number
Other languages
German (de)
Inventor
Gesellschaft Fuer Chemis Basel
Original Assignee
Chem Ind Basel
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 Chem Ind Basel filed Critical Chem Ind Basel
Publication of CH202159A publication Critical patent/CH202159A/en

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Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C241/00Preparation of compounds containing chains of nitrogen atoms singly-bound to each other, e.g. hydrazines, triazanes
    • C07C241/02Preparation of hydrazines

Description

  

  Verfahren zur Herstellung eines Hydrazins der     Diphenylreihe.       Es wurde gefunden, dass man ein neues       Hydrazin    der     Diphenylreihe,    das     4-Hydrazino-          3-3'-dichlor-4'-acetylaminodiphenyl,    erhält,  wenn man     4-Diazo-3-3'-dichlor-4'-acetylamino-          diphenyl    mit Reduktionsmitteln behandelt, die  den     Diazorest    in den     Hydrazinrest    überführen.

    Das     4-Hydrazino-3-3'-dicblor-4'-acetylamino-          diphenyl    ist ein wertvolles Zwischenprodukt  zur Herstellung von     Farbstoffen.    Aus Alko  hol kristallisiert, bildet es weisse     Nädelchen     vom Schmelzpunkt 1840.  



  <I>Beispiel 1:</I>  29,5 Teile fein gemahlenes     4-Amiiio-3-3'-          dichlor-4'-acetylaminodiphenyl    werden in 50  Teilen Wasser und etwas Eis angerührt, mit  30 Teilen Salzsäure d =<B>1,10'</B> versetzt. Man  tropft bei<B>0-100</B> langsam eine Lösung von  7 Teilen     Natriumnitrit    in etwa 20 Teilen  Wasser zu und rührt nach beendigter Zu  gabe des     Nitrites    noch etwa eine Stunde und       filtriert,

         Die filtrierte     Diazolösung    lässt man unter  gutem Rühren in ein von aussen gekühltes  Gemisch von 100 Teilen     Zinnchlorür    etwa       63        %ig        und        50        Teilen        Salzsäure        d        =        1,15     bei<B>0-51</B> einlaufen.  



  Das gebildete     Hydrazin    fällt als schwer  lösliches Chlorhydrat aus. Man rührt noch  etwa 12 Stunden,     nutscht,    wäscht mit ver  dünnter Salzsäure und dann mit Wasser  nach.  



  Durch Rühren des     Nutschgutes,    gegebenen  falls nach dem     Entzinnen,    mit verdünnten  Alkalien wird das freie     Hydrazin    erhalten.  <I>Beispiel 2:</I>  29,5 Teile fein gemahlenes     4-Amino-3-3'-          dichlor-4'-acetylaminodiphenyl    werden nach  Beispiel 1 dianotiert.

   Die filtrierte     Diazo-          lösung    lässt man bei 0-100 in ein Gemenge       von        63,2        Teilen        40        %iger        Natriumbisulfit-          lösung,    3 Teilen     Natriumcarbonat    und 15  Teilen     Natriumhydrogydlösung    von     860        136         einlaufen.

       blan    rührt über Nacht, versetzt  mit 10 Teilen Essigsäure, 10 Teilen Zink  staub und erwärmt bis zur     Entfärbung.    Die  warme Lösung wird filtriert und die     Hydra-          zinsulfonsäure    aasgesalzen. Durch Behand  lung mit verdünnter Salzsäure wird die       Hydrazirisulfonsäure    in das Chlorhydrat des  Hydrazins übergeführt, aus welchem durch  Alkalien das     Hydrazin    in Freiheit gesetzt  werden kann.



  Process for the preparation of a diphenyl series hydrazine. It has been found that a new hydrazine of the diphenyl series, 4-hydrazino-3-3'-dichloro-4'-acetylaminodiphenyl, is obtained when 4-diazo-3-3'-dichloro-4'-acetylamino-diphenyl is obtained treated with reducing agents that convert the diazo residue into the hydrazine residue.

    The 4-hydrazino-3-3'-dicblor-4'-acetylaminodiphenyl is a valuable intermediate for the production of dyes. Crystallized from alcohol, it forms white needles with a melting point of 1840.



  Example 1: 29.5 parts of finely ground 4-amino-3-3'-dichloro-4'-acetylaminodiphenyl are mixed in 50 parts of water and a little ice, with 30 parts of hydrochloric acid d = <B> 1.10 'staggered. A solution of 7 parts of sodium nitrite in about 20 parts of water is slowly added dropwise at <B> 0-100 </B> and, after the addition of the nitrite is complete, the mixture is stirred for about an hour and filtered,

         The filtered diazo solution is allowed to run into an externally cooled mixture of 100 parts of approximately 63% tin chloride and 50 parts of hydrochloric acid d = 1.15 at 0-51 at <B> 0-51 </B> with thorough stirring.



  The hydrazine formed precipitates as a poorly soluble hydrochloride. The mixture is stirred for about 12 hours, suction filtered, washed with dilute hydrochloric acid and then with water.



  The free hydrazine is obtained by stirring the filter material, if necessary after detinning, with dilute alkalis. Example 2: 29.5 parts of finely ground 4-amino-3-3'-dichloro-4'-acetylaminodiphenyl are dianotized according to Example 1.

   The filtered diazo solution is allowed to run at 0-100 into a mixture of 63.2 parts of 40% strength sodium bisulfite solution, 3 parts of sodium carbonate and 15 parts of 860 136 sodium hydrogen solution.

       Blan is stirred overnight, 10 parts of acetic acid and 10 parts of zinc dust are added and the mixture is heated until it is discolored. The warm solution is filtered and the hydrazinesulfonic acid is washed out. By treatment with dilute hydrochloric acid, the hydrazine sulfonic acid is converted into the hydrazine hydrochloride, from which the hydrazine can be liberated by alkalis.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Hydra zins der Diphenylreihe des 4-Hydi,azino-3-3'- dichlor-4'-acetylarninodiphenyls, dadurch ge kennzeichnet, dar man 4-Diazo-3-3'-dichlor- 4'-acetylaminodiplienyl mit Reduktionsmitteln behandelt, die den Diazorest in den Hydrazin- rest überführen. Das 4-Hydrazirio-3-3'-dichlor- 4'-acetylaminodipheriyl ist ein wertvolles Zwischenprodukt zur Herstellung von Farb stoffen. PATENT CLAIM: A process for the preparation of a hydrazine of the diphenyl series of 4-hydi, azino-3-3'-dichloro-4'-acetylarninodiphenyl, characterized in that it is 4-diazo-3-3'-dichloro-4'-acetylaminodiplienyl treated with reducing agents that convert the diazo residue into the hydrazine residue. The 4-hydrazirio-3-3'-dichloro-4'-acetylaminodipheriyl is a valuable intermediate for the production of dyes. Aus Alkohol kristallisiert, bildet es weisse Nädelchen vom Schmelzpunkt 184'. Crystallized from alcohol, it forms white needles with a melting point of 184 '.
CH202159D 1935-11-06 1935-11-06 Process for the preparation of a diphenyl series hydrazine. CH202159A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH200061T 1935-11-06
CH202159T 1935-11-06

Publications (1)

Publication Number Publication Date
CH202159A true CH202159A (en) 1938-12-31

Family

ID=25723405

Family Applications (1)

Application Number Title Priority Date Filing Date
CH202159D CH202159A (en) 1935-11-06 1935-11-06 Process for the preparation of a diphenyl series hydrazine.

Country Status (1)

Country Link
CH (1) CH202159A (en)

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