DE337734C - Process for the preparation of nitro derivatives of the ss-azides of the anthraquinone series - Google Patents

Process for the preparation of nitro derivatives of the ss-azides of the anthraquinone series

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Publication number
DE337734C
DE337734C DE1918337734D DE337734DD DE337734C DE 337734 C DE337734 C DE 337734C DE 1918337734 D DE1918337734 D DE 1918337734D DE 337734D D DE337734D D DE 337734DD DE 337734 C DE337734 C DE 337734C
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azides
preparation
anthraquinone series
nitro derivatives
nitro
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Expired
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DE1918337734D
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German (de)
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Bayer AG
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Farbenfabriken Vorm Friedr Bayer and Co
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Description

Verfahren zur Darstellung von Nitroderivaten der ,ß-Azide der Anthrachinonreihe. Es wurde gefunden, daß man überraschenderweise die ß-Azide der Anthrachinonreihe nitrieren kann, wobei die Nitrogruppe in die der ß-Azidogruppe benachbarte a-Stellung tritt. Das Verfahren liefert sehr gute Ausbeuten: Aus 2-Azidoanthrachinon entsteht so das i-Nitro-2-Azidoanthrachinon, aus dem bei der Reduktion das i # 2-Diaminoanthrachinon erhalten wird. Aus 2 # 6-Diazidoanthrachinon wird das i # 5-Dinitro-2 # 6-Diazidoanthrachinon gewonnen.Process for the preparation of nitro derivatives of the, ß-azides of the anthraquinone series. It has been found that, surprisingly, the ß-azides of the anthraquinone series can nitrate, the nitro group in the α-position adjacent to the β-azido group occurs. The process gives very good yields: 2-azidoanthraquinone is formed so the i-nitro-2-azidoanthraquinone, from which the i # 2-diaminoanthraquinone in the reduction is obtained. 2 # 6-Diazidoanthraquinone becomes the i # 5-Dinitro-2 # 6-Diazidoanthraquinone won.

Überraschend ist bei dieser Reaktion, daß, obwohl die nicht nitrierten Azide bereits in der Kälte mit konzentrierter Schwefelsäure allein lebhaft Stickstoff abspalten, dies bei Anwesenheit von Salpetersäure nicht eintritt, indem sich hierbei nur die Neigung zur Nitrierung geltend macht.What is surprising about this reaction is that although it is not nitrated Azides even in the cold with concentrated sulfuric acid alone vividly nitrogen split off, this does not occur in the presence of nitric acid by doing this only asserts the tendency to nitration.

Beispiel i.Example i.

i kg 2-Azidoanthrachinon wird bei Zimmertemperatur in 51 rauchende Salpetersäure eingetragen, wobei Lösung eintritt. Nach kurzer Zeit scheiden sich aus der Lösung derbe hellgelbe Kristalle des Mononitrod.erivates ab, die abfiltriert werden, sobald sich ihre Menge nicht weiter vermehrt. Sie stellen das chemisch reine i-Nitroderivat dar. Aus der Mutterlauge kann durch Verdünnen mit Wasser der Rest gewonnen werden. Das Nitroazid kristallisiert aus Pyridin in schwach gelbgrünen Kristallen, die bei 2io' unter Zersetzung schmelzen und sich am Lichte und an der Luft schwach orangerot färben.i kg of 2-azidoanthraquinone is fuming at room temperature in 51 Entered nitric acid, whereby solution occurs. After a short time they divorce from the solution coarse pale yellow crystals of Mononitrod.erivates, which are filtered off as soon as their number does not increase any further. They represent the chemically pure i-Nitro derivative. The remainder of the mother liquor can be diluted with water be won. The nitroazide crystallizes from pyridine in pale yellow-green Crystals which melt at 2io 'with decomposition and which stand in the light and in the Color air pale orange-red.

Erhitzt man das Nitroazid in wässeriger Suspension mit- Schwefelnatrium, so färbt sich das Gemisch zunächst grün und dann violett, worauf beim weiteren Erhitzen unter Stickstoffentwicklung das bekannte i - 2-Diaminoanthrachinon sich unmittelbar kristallisiert abscheidet.If the nitroazide is heated in aqueous suspension with sodium sulfur, so the mixture first turns green and then purple, which is followed by further heating the well-known i - 2-diaminoanthraquinone developed directly with evolution of nitrogen precipitates in crystallized form.

Beispiel 2.Example 2.

i kg, 2 - 6-Diazidoanthrachinon wird bei Zimmertemperatur in 6 1 rauchende Salpetersäure eingetragen, wobei sich ebenfalls wie bei Beispiel r das Dinitroderivat in Kristallen abscheidet. Durch Umkristallisieren aus Nitrobenzol, wobei man aber nicht bis zum Sieden erhitzen darf, erhält man hellgelbe Nadeln, die bei Zoo' schmelzen und sich bei 2o2' unter starker Kohleabscheidung plötzlich zersetzen. Beim Erhitzen mit Schwefelnatrium erhält man unmittelbar in violetten Nadeln das i # 2 # 5 # 6-Tetraaminoanthrachinon.i kg, 2 - 6-diazidoanthraquinone is at room temperature in 6 1 fuming Entered nitric acid, with the dinitro derivative as in example r deposited in crystals. By recrystallization from nitrobenzene, but not allowed to heat to boiling, you get light yellow needles that melt at Zoo ' and suddenly decompose at 2o2 'with strong carbon deposition. When heated with sodium sulphide, i # 2 # 5 # 6-tetraaminoanthraquinone is obtained directly in violet needles.

Beispiel 3.Example 3.

i kg 2 - 6-Diazidoanthrachinon wird allmählich unter Kühlung und Rühren in eine Lösung von 2 kg Salpeter in 2o kg konzentrierter Schwefelsäure eingetragen, wobei sich ohne Stickstoffentwicklung das. Dinitrodiazid in hellgelben Kristallen abscheidet, die abfiltriert und neutral gewaschen werden. . Das so erhaltene Dinitrodiazid hat die gleichen Eigenschaften wie das in Beispiel_ z beschrieb e. ,: Die `neuen Verbindungen sollen als Ausgangssto'äur -Dar#stelittng von Farbstoffen sowie für technische Produkte verwendet werden.1 kg of 2-6-diazidoanthraquinone is gradually introduced into a solution of 2 kg of nitric acid in 2o kg of concentrated sulfuric acid with cooling and stirring, the dinitrodiazide separating out in light yellow crystals which are filtered off and washed until neutral without the evolution of nitrogen. . The dinitrodiazide thus obtained has the same properties as that described in Example _ z. ,: The `new compounds are to be used as starting materials for dyes and for technical products.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung von Nitroderivaten der f-Azide der Anthrachinonreihe, dadurch gekennzeichnet, daß man die ß-Azide der Anthrachinonreihe mit starker Salpetersäure bzw. Salpeter-Schwefelsäure behandelt. PATENT CLAIM: Process for the preparation of nitro derivatives of the f-azides of the anthraquinone series, characterized in that the ß-azides of the anthraquinone series are treated with strong nitric acid or nitric-sulfuric acid.
DE1918337734D 1918-04-19 1918-04-19 Process for the preparation of nitro derivatives of the ss-azides of the anthraquinone series Expired DE337734C (en)

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DE337734T 1918-04-19

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