DE286094C - - Google Patents

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Publication number
DE286094C
DE286094C DENDAT286094D DE286094DA DE286094C DE 286094 C DE286094 C DE 286094C DE NDAT286094 D DENDAT286094 D DE NDAT286094D DE 286094D A DE286094D A DE 286094DA DE 286094 C DE286094 C DE 286094C
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DE
Germany
Prior art keywords
derivatives
anthraquinone
benzoylamino
oxazoles
nitro
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DENDAT286094D
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German (de)
Publication of DE286094C publication Critical patent/DE286094C/de
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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09BORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B5/00Dyes with an anthracene nucleus condensed with one or more heterocyclic rings with or without carbocyclic rings
    • C09B5/24Dyes with an anthracene nucleus condensed with one or more heterocyclic rings with or without carbocyclic rings the heterocyclic rings being only condensed with an anthraquinone nucleus in 1-2 or 2-3 position

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

PATENTSCHRIFTPATENT LETTERING

- JVr 286094 -KLASSE 226. GRUPPE- JVr 286094 - CLASS 226th GROUP

Verfahren zur Darstellung von Anthrachinonoxazolen. Patentiert im Deutschen Reiche vom 28. Oktober 1913 ab. Process for the preparation of anthraquinone oxazoles. Patented in the German Empire on October 28, 1913.

In der Patentschrift 236857, Kl. 22 b, ist angegeben, daß beim Erhitzen von Benzoylamino-o-halogenanthrachinonen mit kondensierenden Mitteln Phenanthridonderivate entstehen, indem eine Halogenwasserstoffabspaltung zwischen dem Halogen des Anthrachinonrestes und einem orthoständigen Η-Atom der Benzoylgruppe stattfindet. Diese angeblichen Phenanthridonderivate wurden durch die Untersuchungen von P. Nawiasky (Zeitschrift für ang. Chemie 26, Seite 438) und von Fr. Ulimann und W. Junghanns (Ann. 399, Seite 331 und 335) als Anthrachinon-pphenyloxazole charakterisiert.In the patent specification 236857, class 22 b, it is indicated that when heating benzoylamino-o-halogenanthraquinones with condensing agents phenanthridone derivatives are formed by splitting off hydrogen halide between the halogen of the anthraquinone residue and an ortho Η atom of the Benzoyl group takes place. These alleged phenanthridone derivatives were identified by the investigations by P. Nawiasky (Zeitschrift für ang. Chemie 26, page 438) and by Fr. Ulimann and W. Junghanns (Ann. 399, pages 331 and 335) as anthraquinone-pphenyloxazole characterized.

Es wurde nun gefunden, daß eine innere Kondensation ebenfalls stattfindet, wenn man Benzoylamino-o-nitroanthrachinone mit kondensierenden Mitteln behandelt, und daß auch die so erhältlichen Derivate Oxazole sind.It has now been found that internal condensation also takes place when one Benzoylamino-o-nitroanthraquinones treated with condensing agents, and that too the derivatives obtainable in this way are oxazoles.

H6 O2 <H 6 O 2 <

,NHCOC6H5 , NHCOC 6 H 5

— N- N

-NO9 -NO 9

O2H = C14 H6 O2 <O 2 H = C 14 H 6 O 2 <

CSH,C S H,

Die Verwendbarkeit der Benzoylamino-onitroänthrachinone zu diesem Zweck ist durchaus überraschend, da Halogen- und Nitroderivate auch in der Anthrachinonreihe in ihren Reaktionen nicht allgemein übereinstimmen und insbesondere Anthrachinonderivate, die eine Nitrogruppe in 2-Stellung enthalten, sonst recht beständig sind. Somit war eine glatte Bildung von Oxazolen unter Abspaltung von salpetriger Säure beim vorliegenden Verfahren nicht von vornherein zu erwarten.The usability of the benzoylamino-onitroanthraquinones for this purpose it is quite surprising that halogen and nitro derivatives are also in their anthraquinone series Reactions do not generally match, and in particular anthraquinone derivatives that contain a nitro group in the 2-position, are otherwise quite stable. Thus it was a smooth one Formation of oxazoles with elimination of nitrous acid in the present process not to be expected in advance.

Beispiel.Example.

' 2 Teile des in der Patentschrift 254185 beschriebenen 2-Nitro-i · 4-dibenzoylaminoanthrachinons werden mit 2 Teilen calc. Soda und 10 Teilen Naphtalin etwa 1 Stunde am Rückflußkühler erhitzt. Das nach dem Entfernen des Naphtalins mittels Alkohols und dem Auswaschen mit Wasser erhaltene Reaktionsprodukt ist reines 4-Benzoylamino-i · 2-anthrachinonju-pheriyloxazol. '2 parts of that described in patent specification 254185 2-Nitro-i · 4-dibenzoylaminoanthraquinones are calc with 2 parts. Soda and 10 parts of naphthalene refluxed for about 1 hour. That after removal of the naphthalene obtained by means of alcohol and washing with water is pure 4-benzoylamino-i · 2-anthraquinoneju-pheriyloxazole.

Aus Chlorbenzol kristallisiert es in schönen orangefarbenen, bei 298 ° schmelzenden Nadeln. Der Körper ist ziemlich schwer in den gewöhnlichen Lösungsmitteln mit oranger Farbe löslich. Mit konzentrierter Schwefelsäure gibt er eine braunorange Lösung, die beim Erhitzen fast farblos wird, indem die Benzoylgruppe abgespalten wird. Das so erhaltene Aminoderivat kristallisiert aus Nitrobenzol in dunkelvioletten, bei 360 ° schmelzenden Nadeln.It crystallizes from chlorobenzene in beautiful orange needles that melt at 298 °. The body is quite heavy in the common solvents with an orange color soluble. With concentrated sulfuric acid he gives a brown-orange solution, which when heated becomes almost colorless as the benzoyl group is split off. The thus obtained Amino derivative crystallizes from nitrobenzene in dark purple needles that melt at 360 °.

Claims (1)

Patent-Anspruch:Patent claim: Verfahren zur Darstellung von Anthrachinonoxazolen, dadurch gekennzeichnet, daß man Benzoylamino-o-nitroanthrachinone oder deren Derivate mit kondensierenden Mitteln behandelt.Process for the preparation of anthraquinone oxazoles, characterized in that that one benzoylamino-o-nitroanthraquinones or their derivatives with condensing Means treated.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2090140A1 (en) * 1970-05-19 1972-01-14 Mitsui Toatsu Chemicals

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2090140A1 (en) * 1970-05-19 1972-01-14 Mitsui Toatsu Chemicals

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