CH163887A - Process for the preparation of an anthraquinone derivative. - Google Patents
Process for the preparation of an anthraquinone derivative.Info
- Publication number
- CH163887A CH163887A CH163887DA CH163887A CH 163887 A CH163887 A CH 163887A CH 163887D A CH163887D A CH 163887DA CH 163887 A CH163887 A CH 163887A
- Authority
- CH
- Switzerland
- Prior art keywords
- preparation
- anthraquinone derivative
- weight
- parts
- derivative
- Prior art date
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Darstellung eines Anthraehinonderivates. Es wurde gefunden, dass man ein Anthra- chinonderivat, das ein wertvolles Zwischen produkt für die Darstellung von Farbstoffen darstellt, erhalten kann, wenn man Verbin dungen der Formel
EMI0001.0004
mit einem chlorierend wirkenden Mittel, z. B. Chlor oder Chloraten, in Gegenwart von Salz säure, in Anwesenheit von Wasser bei Tem peraturen oberhalb 80 C behandelt. Man kann als Ausgangsstoff sowohl die freie Sulfo- säure, als auch deren Alkali- und Erdalkali- salze verwenden.
Das Reaktionsprodukt ist seiner Analyse nach das bisher noch nicht bekannte 1-Cyan- 2-chloranthrachinon und bildet, aus Nitro- benzol umkristallisiert, fast weisse Blättchen vom Schmelzpunkt 284-285 C, die sich in konzentrierter Schwefelsäure mit gelber Farbe lösen und eine grüne güpe liefern. <I>Beispiel:</I> 100 Gewichtsteile 1-cyananthrachinon-2- sulfosaures Natrium werden in 60'00 Gewichts teilen heissen Wassers gelöst.
Man fügt zur entstandenen Lösung 600 Gewichtsteile Schwefelsäure von 50 B6 und 480 Gewichts teile konzentrierte Salzsäure und lässt im Laufe von einigen Stunden zu der auf 95 C erhitzten Lösung die Lösung von 60 Gewichts teilen Natriumchlorat in 500 Gewichtsteilen Wasser fliessen. Man hält sodann die Tem peratur des Reaktionsgemisches noch so lange auf 95-100 C, bis das Filtrat einer warm abfiltrierten Probe beim Versetzen mit Koch salz keine Fällung von unverändertem Aus gangsmaterial mehr liefert. Man saugt dann heiss ab und wäscht mit heissem Wasser neutral.
Process for the preparation of an anthraquinone derivative. It has been found that an anthrachinone derivative, which is a valuable intermediate for the preparation of dyes, can be obtained if compounds of the formula
EMI0001.0004
with a chlorinating agent, e.g. B. chlorine or chlorates, in the presence of hydrochloric acid, treated in the presence of water at temperatures above 80 C. Both the free sulphonic acid and its alkali and alkaline earth salts can be used as the starting material.
According to his analysis, the reaction product is the hitherto unknown 1-cyano-2-chloroanthraquinone and, recrystallized from nitrobenzene, forms almost white flakes with a melting point of 284-285 C, which dissolve in concentrated sulfuric acid with a yellow color and a green güpe deliver. <I> Example: </I> 100 parts by weight of 1-cyananthraquinone-2-sulphonic acid sodium are dissolved in 60,000 parts by weight of hot water.
600 parts by weight of sulfuric acid of 50 B6 and 480 parts by weight of concentrated hydrochloric acid are added to the resulting solution and the solution of 60 parts by weight of sodium chlorate in 500 parts by weight of water is allowed to flow over a few hours to the solution heated to 95 ° C. The temperature of the reaction mixture is then kept at 95-100 ° C. until the filtrate of a sample filtered off warm when mixed with sodium chloride no longer provides any precipitation of unchanged starting material. It is then suctioned off while hot and washed neutral with hot water.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE163887X | 1931-08-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH163887A true CH163887A (en) | 1933-09-15 |
Family
ID=5683949
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH163887D CH163887A (en) | 1931-08-28 | 1932-08-04 | Process for the preparation of an anthraquinone derivative. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH163887A (en) |
-
1932
- 1932-08-04 CH CH163887D patent/CH163887A/en unknown
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