CH176018A - Process for the preparation of 1-benzoylamino-4-N-nitramine-2,5-dimethoxybenzene. - Google Patents

Process for the preparation of 1-benzoylamino-4-N-nitramine-2,5-dimethoxybenzene.

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Publication number
CH176018A
CH176018A CH176018DA CH176018A CH 176018 A CH176018 A CH 176018A CH 176018D A CH176018D A CH 176018DA CH 176018 A CH176018 A CH 176018A
Authority
CH
Switzerland
Prior art keywords
nitramine
parts
amino
dimethoxybenzene
benzoylamino
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 CH176018A publication Critical patent/CH176018A/en

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Description

  

  Verfahren zur Herstellung des     1-Benzoylamino-4-N-nitramin-2.        ö-dimethoaybenzols.       Es wurde gefunden, dass man zu einem  neuen aromatischen     N-Nitramin,    dem     1-Ben-          zoylamino-4-N-nitramin-2    .     5-dimethoxyben-          zol,    gelangt, wenn man das     Nitramin    aus       1-Amino-4-nitro-2    .

       5-dimethoxybenzol    derart  mit Reduktionsmitteln behandelt, dass die       4-ständige        Nitrogruppe    in eine     Aminogruppe     umgewandelt wird, und     wenn    man die so  erhaltene Verbindung     benzoyliert.    Die neue  Verbindung bildet in Form ihres     Natrium-          salzes    ein kristalliner Körper, der ein wert  volles Zwischenprodukt zur Herstellung von  Farbstoffen ist.  



  Das hier als Ausgangsprodukt verwen  dete     N-Nitramin    des     1-Amino-4-nitro-2.5-          dimethoxybenzols    entsteht durch     Diazotieren     des     1-Amino-4-nitro-2.5-dimethoxybenzols     und     Behandeln    der erhaltenen     Diazoverbin-          dung    in verdünnter     ätzalkalischer    Lösung  mit     Natriumhypochlorit.     



  <I>Beispiel:</I>  Zu einer Suspension von 99 Teilen       1-Amino-4-nitro-2.        5-dimethoxybenzol    in 150    Teilen 80%iger Salzsäure, 375 Teilen Was  ser und 200 Teilen Eis lässt man eine Lösung  von 36 Teilen Nitrit in 75 Teilen Wasser  tropfen. Man rührt 30     Minuten    bei 10 bis  12' und filtriert hierauf von Verunreini  gungen ab.  



  Die     Diazolösung    lässt man nun bei -5  bis 0   zu einer     Lösung    von 100 Teilen Na  triumhydroxyd in 180.0 Teilen Wasser trop  fen, hierauf gibt man     4,000    Teile     Eis    und  325 Teile     Natriumhypochloritlösung    (enthal  tend 11,8 % aktives Chlor) dazu und lässt  während 20 Stunden rühren. Von     Verunreini-          gungen    wird     filtriert,    zum     Filtrat    gibt man  unter Rühren 1500 Teile Kochsalz.

   Das     Na.-          triumsalz    des     N-Nitramins    von     1-Amino-4-          nitro-2.5-dimethogybenzol    scheidet sich als  orangegelbe     Blätter    rein ab.  



  132 Teile     Natriumsalz    des so gewonnenen       Nitramins    werden in 1320 Teilen Wasser ge  löst, bei     :Siedetemperatur    mit 100 Teilen Na  triumsulfit in kleinen Portionen versetzt; die  anfänglich orangerote Lösung wird nach kur-           zer    Zeit farblos. Man filtriert heiss von Ver  unreinigungen ab; durch Zusatz von Koch  salz scheidet sich beim Erkalten das Na  triumsalz des     Mono-N-Nitramins    des     1.4-          Diaminolhydrochinondimethyläthers    als farb  loses kristallines Pulver ab.  



  117 Teile dieses Salzes und 50 Teile Na  triumhydrogyd werden in 1250 Teilen Was  ser gelöst; bei 50 bis<B>60'</B> lässt man 78 Teile       Benzoylchlorid    unter Rühren     innert    2 Stun  den     zutropfen.    Man     filtriert    heiss, versetzt  das Filtrat mit Kochsalz; beim Erkalten  scheidet sich das     Natriumsalz    des     N-Nitra-          mins    von 1-     Amino    - 4 -     benzoylaminohydro-          chinondimethyläther    ab.



  Process for the preparation of 1-benzoylamino-4-N-nitramine-2. ö-dimethoaybenzols. It has been found that a new aromatic N-nitramine, 1-benzoylamino-4-N-nitramine-2. 5-dimethoxyben- zene is obtained when the nitramine is obtained from 1-amino-4-nitro-2.

       5-dimethoxybenzene treated with reducing agents in such a way that the 4-position nitro group is converted into an amino group, and when the compound thus obtained is benzoylated. In the form of its sodium salt, the new compound forms a crystalline body that is a valuable intermediate product in the manufacture of dyes.



  The N-nitramine of 1-amino-4-nitro-2.5-dimethoxybenzene used here as the starting product is produced by diazotizing 1-amino-4-nitro-2.5-dimethoxybenzene and treating the resulting diazo compound in a dilute caustic solution with sodium hypochlorite.



  <I> Example: </I> To a suspension of 99 parts of 1-amino-4-nitro-2. 5-dimethoxybenzene in 150 parts of 80% hydrochloric acid, 375 parts of water and 200 parts of ice, a solution of 36 parts of nitrite in 75 parts of water is allowed to drip. The mixture is stirred for 30 minutes at 10 to 12 minutes and impurities are then filtered off.



  The diazo solution is now allowed to drop at -5 to 0 to a solution of 100 parts of sodium hydroxide in 180.0 parts of water Stir for hours. Impurities are filtered off, and 1500 parts of common salt are added to the filtrate while stirring.

   The sodium salt of the N-nitramine of 1-amino-4-nitro-2,5-dimethogybenzene separates out as pure orange-yellow leaves.



  132 parts of the sodium salt of the nitramine thus obtained are dissolved in 1320 parts of water, and 100 parts of sodium sulfite are added in small portions at the boiling point; the initially orange-red solution becomes colorless after a short time. Impurities are filtered off while hot; by adding sodium chloride, the sodium salt of the mono-N-nitramine of 1,4-diaminolhydroquinone dimethyl ether separates as a colorless crystalline powder on cooling.



  117 parts of this salt and 50 parts of sodium hydrogen hydroxide are dissolved in 1250 parts of water; at 50 to 60 ', 78 parts of benzoyl chloride are added dropwise with stirring within 2 hours. It is filtered hot, the filtrate is treated with common salt; on cooling, the sodium salt of N-nitra- min separates from 1-amino-4-benzoylamino hydroquinone dimethyl ether.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen aromatischen N-Nitramins, des 1-Benzoyl- amino-4-N-nitramin- 2 . 5 -dimethogybenzols, dadurch gekennzeichnet, dass man das N-Ni- tramin aus 1-Amino-4-nitro-2.5-dimethogy- benzol derart mit Reduktionsmitteln behan delt, dass die 4-ständige Nitrogruppe in eine Aminogruppe umgewandelt wird, PATENT CLAIM: Process for the production of a new aromatic N-nitramine, 1-benzoyl-amino-4-N-nitramine-2. 5-dimethogybenzene, characterized in that the N-nitramine from 1-amino-4-nitro-2.5-dimethogybenzene is treated with reducing agents in such a way that the 4-position nitro group is converted into an amino group, und dass man die so erhaltene Verbindung benzoyliert. Die neue Verbindung bildet in Form ihres Natriumsalzes ein kristalliner Körper, .der ein wertvolles Zwischenprodukt zur Herstel lung von Farbstoffen ist. and that the compound thus obtained is benzoylated. The new compound forms a crystalline body in the form of its sodium salt, which is a valuable intermediate product for the production of dyes.
CH176018D 1934-01-27 1934-01-27 Process for the preparation of 1-benzoylamino-4-N-nitramine-2,5-dimethoxybenzene. CH176018A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH176018T 1934-01-27

Publications (1)

Publication Number Publication Date
CH176018A true CH176018A (en) 1935-03-31

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Family Applications (1)

Application Number Title Priority Date Filing Date
CH176018D CH176018A (en) 1934-01-27 1934-01-27 Process for the preparation of 1-benzoylamino-4-N-nitramine-2,5-dimethoxybenzene.

Country Status (1)

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CH (1) CH176018A (en)

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