CH206603A - Process for the preparation of an o-haloanthraquinone-B-carboxylic acid. - Google Patents
Process for the preparation of an o-haloanthraquinone-B-carboxylic acid.Info
- Publication number
- CH206603A CH206603A CH206603DA CH206603A CH 206603 A CH206603 A CH 206603A CH 206603D A CH206603D A CH 206603DA CH 206603 A CH206603 A CH 206603A
- Authority
- CH
- Switzerland
- Prior art keywords
- acid
- carboxylic acid
- preparation
- aroylarylcarboxylic
- weight
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C66/00—Quinone carboxylic acids
- C07C66/02—Anthraquinone carboxylic acids
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Darstellung einer o-Ilalogenanthrachinon-ss-carbonsäure. Gegenstand des vorliegenden Zusatzpa tentes ist ein Verfahren zur Darstellung einer o-Halogenanthrachinon-p-carbonsäure, welches dadurch gekennzeichnet ist, dass man 5-Chlor- trimellithsäureanhydrid mit p-Dichlorbenzol in Gegenwart von Aluminiumchlorid konden siert und die so erhaltene Aroylarylcarbon- säure mit einem ringschliessenden Mittel behandelt.
<I>Beispiel:</I> 30 Gewichtsteile 5 - Chlortrimellithsäure- anhydrid werden mit 160 Gewichtsteilen Alu miniumchlorid, 40 Gewichtsteilen Kochsalz und 60 Gewichtsteilen .p - Dichlorbenzol zu sammen verrieben und auf<B>110'</B> C erhitzt. Nach 2 Stunden wird die Schmelze mit Eis zersetzt und durch Wasserdampfdestillation vom überschüssigen Dichlorbenzol befreit.
Die rohe Benzoylbenzoesäure wird in verdünnter Natronlauge kalt gelöst und vom Ungelösten abfiitriert. Beim Ansäuern fällt die Trichlor- carboxybenzoylbenzoesäure aus. 40 Gewichtsteile der so erhaltenen Ben- zoylbenzoesäure werden in 400 Gewichtsteilen 95 o/oiger Schwefelsäure bei<B>100"</B> C schnell eingetragen und die Temperatur auf 160 C erhöht. Nach etwa 15 Minuten ist die Um setzung beendet. Die Lösung wird nach dem Erkalten auf Eis gegossen und der so erhal tene Niederschlag abgesaugt und neutral ge waschen.
Die so erhaltene 1.4.6 - Trichlor- antbrachinon-7-carbonsäure ist eine neue Verbindung, die zur Herstellung von Farb stoffen verwendet werden soll. Sie kristalli siert aus Essig in schwach gelben Nädelchen vom Schmelzpunkt<B>269'</B> C.
Process for the preparation of an o-ilalogenanthraquinone-ß-carboxylic acid. The subject of the present Zusatzpa tentes is a process for the preparation of an o-halanthraquinone-p-carboxylic acid, which is characterized in that 5-chloro-trimellitic anhydride is condensed with p-dichlorobenzene in the presence of aluminum chloride and the aroylarylcarboxylic acid thus obtained with a treated with ring-closing agents.
<I> Example: </I> 30 parts by weight of 5-chlorotrimellitic anhydride are triturated together with 160 parts by weight of aluminum chloride, 40 parts by weight of common salt and 60 parts by weight of p-dichlorobenzene and heated to 110 ° C. After 2 hours the melt is decomposed with ice and freed from excess dichlorobenzene by steam distillation.
The crude benzoylbenzoic acid is dissolved cold in dilute sodium hydroxide solution and the undissolved material is filtered off. The trichlorocarboxybenzoylbenzoic acid precipitates out on acidification. 40 parts by weight of the benzoylbenzoic acid obtained in this way are quickly introduced into 400 parts by weight of 95% sulfuric acid at 100 ° C. and the temperature is increased to 160 ° C. The reaction is complete after about 15 minutes. The solution is poured onto ice after cooling and the precipitate obtained in this way is suctioned off and washed neutral.
The 1.4.6 trichloro-antbrachinone-7-carboxylic acid obtained in this way is a new compound that is to be used for the production of dyes. It crystallizes from vinegar in pale yellow needles with a melting point <B> 269 '</B> C.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE206603X | 1936-05-08 | ||
CH198967T | 1937-05-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH206603A true CH206603A (en) | 1939-08-15 |
Family
ID=25723181
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH206603D CH206603A (en) | 1936-05-08 | 1937-05-07 | Process for the preparation of an o-haloanthraquinone-B-carboxylic acid. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH206603A (en) |
-
1937
- 1937-05-07 CH CH206603D patent/CH206603A/en unknown
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