CH196350A - Process for the preparation of a carbazole derivative. - Google Patents
Process for the preparation of a carbazole derivative.Info
- Publication number
- CH196350A CH196350A CH196350DA CH196350A CH 196350 A CH196350 A CH 196350A CH 196350D A CH196350D A CH 196350DA CH 196350 A CH196350 A CH 196350A
- Authority
- CH
- Switzerland
- Prior art keywords
- carbazole derivative
- preparation
- works
- bromo
- solvent
- Prior art date
Links
Landscapes
- Indole Compounds (AREA)
Description
Verfahren zur Herstellung eines Carbazolderivates. Es wurde gefunden, dass man Carbazol- derivate erhält, wenn man sekundäre Amine, deren Stickstoff einerseits an einen Arylrest, anderseits an ein p-Chinon eines mindestens zweikernigen Ringsystems :
gebunden ist, wo bei in beiden Fällen in je einer o"Stellung zur Iminoggr uppe Halogen enthalten ist, bei höherer Temperatur, zweckmässig in @Gegen- wart von Lösungsmitteln, mit Kupfer be handelt.
. Gegenstand vorliegenden Patentes ist nun ein Verfahren zur ,Herstellung eines Carba- zolderivates durch Einwirken von Kupfer auf 1- (1--Brom-ss- naplhthylamino) - 2 -brom- anthraehinon bei höherer Temperatur, zweck mässig in Gegenwart eines Lösungsmittels und in Gegenwart einer tertiären Base.
Als Lösungsmittel hat sich Nitrobenzol als :ge eignet erwiesen. Als tertiäre Base kann eine Pyridinfraktion vom Siedepunkt 180 C Ver- wendung finden.
Das erhältliche Carbazolderivat ist bereits bekannt. Es stellt :braune Nadeln :dar. Es löst sich in konzentrierter Schwefelsäure erst mit grünstichig blauer, bald reiner blau werdender Farbe.
Die Verbindung besitzt an sieh Farbstoffeharakter und stellt ein wertvolles Zwischenprodukt dar zur Daretel- lung von Farbstoffen.
Process for the preparation of a carbazole derivative. It has been found that carbazole derivatives are obtained if secondary amines whose nitrogen is attached to an aryl radical on the one hand and to a p-quinone of an at least binuclear ring system on the other:
is bound, where in both cases halogen is contained in an o "position to the imino group, treated with copper at a higher temperature, expediently in the presence of solvents.
. The present patent now relates to a process for preparing a carbazole derivative by the action of copper on 1- (1-bromo-ss- naplhthylamino) -2-bromo-anthraehinone at a higher temperature, advantageously in the presence of a solvent and in the presence a tertiary base.
Nitrobenzene has proven to be a suitable solvent. A pyridine fraction with a boiling point of 180 ° C. can be used as the tertiary base.
The carbazole derivative available is already known. It represents: brown needles: represents. It only dissolves in concentrated sulfuric acid with a greenish blue color that soon becomes pure blue.
The compound has the character of a dye and is a valuable intermediate for the preparation of dyes.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE196350X | 1935-08-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH196350A true CH196350A (en) | 1938-03-15 |
Family
ID=5754279
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH196350D CH196350A (en) | 1935-08-02 | 1936-07-21 | Process for the preparation of a carbazole derivative. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH196350A (en) |
-
1936
- 1936-07-21 CH CH196350D patent/CH196350A/en unknown
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