CH148354A - Process for the preparation of an m-oxy-phenylarylamine carboxylic acid. - Google Patents
Process for the preparation of an m-oxy-phenylarylamine carboxylic acid.Info
- Publication number
- CH148354A CH148354A CH148354DA CH148354A CH 148354 A CH148354 A CH 148354A CH 148354D A CH148354D A CH 148354DA CH 148354 A CH148354 A CH 148354A
- Authority
- CH
- Switzerland
- Prior art keywords
- oxy
- carboxylic acid
- preparation
- phenylarylamine
- dimethyldiphenylamine
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Darstellung einer m-Ogy-phenylarylaminearbonsäure. Vorliegendes Patent bezieht sich auf ein Verfahren zur Herstellung einer m-Oxy- phenylarylamincarbons#Lure, dadurch gekenn zeichnet, dass man ein Alkalisalz von 3-Oxy- 2' 5'-dimethyldiphenylamin mit Kohlensäure unter Druck erhitzt.
Die 3 - Oxy- 2' 5'- dimethyldiphenylamin- carbonsäure ist ein graues Pulver, das nach dem Umkristallisieren aus Eisessig den Schmelzpunkt<B>175</B> bis<B>176'</B> C zeigt. Ihre alkoholische Lösung gibt mit verdünnter Eisenchloridlösung eine violette Färbung. Das Produkt soll als Zwischenprodukt zur Herstellung von Farbstoffen verwendet wer den.
Beispiel: 639 Teile 3-Oxy-2' 5'-dimethyldiphenyl- amin werden mit 200,4 Teilen Ätzkali 83,8 % ig und 1500 Teilen Wasser in einem mit Rührwerk versehenen Autoklaven in Lö sung gebracht und das Wasser im Vakuum bis zur völligen Trockenheit des gebildeten Kaliumsalzes abdestilliert. Nach dem Er kalten der Reaktionsmasse leitet man Kohlen- säure bis zu einem Druck von 10 Atm. Piri und erhitzt auf 170 während 16
Stunden. Die erkaltete Schmelze wird in heissem Wasser gelöst, filtriert und die gebildete Carbonsäure mit Salzsäure gefällt. Zur wei teren Reinigung kann dieselbe aus Soda oder Natriumacetat umgelöst werden.
Process for the preparation of a m-Ogy-phenylarylaminearboxylic acid. The present patent relates to a process for the preparation of an m-oxyphenylarylamine carboxylic acid, characterized in that an alkali metal salt of 3-oxy-2'5'-dimethyldiphenylamine is heated with carbonic acid under pressure.
The 3-oxy-2'5'-dimethyldiphenylamine-carboxylic acid is a gray powder which, after recrystallization from glacial acetic acid, has a melting point of <B> 175 </B> to <B> 176 '</B> C. Your alcoholic solution gives a purple color with a dilute ferric chloride solution. The product is intended to be used as an intermediate in the manufacture of dyes.
Example: 639 parts of 3-oxy-2 '5'-dimethyldiphenylamine are dissolved with 200.4 parts of 83.8% caustic potash and 1500 parts of water in an autoclave equipped with a stirrer, and the water is dissolved in vacuo until complete The dryness of the potassium salt formed is distilled off. After the reaction mass has cooled, carbonic acid is passed up to a pressure of 10 atm. Piri and heated to 170 during 16
Hours. The cooled melt is dissolved in hot water, filtered and the carboxylic acid formed is precipitated with hydrochloric acid. For further cleaning, the same can be made up of soda or sodium acetate.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE148354X | 1928-12-01 | ||
CH146551T | 1929-11-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH148354A true CH148354A (en) | 1931-07-15 |
Family
ID=25714891
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH148354D CH148354A (en) | 1928-12-01 | 1929-11-13 | Process for the preparation of an m-oxy-phenylarylamine carboxylic acid. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH148354A (en) |
-
1929
- 1929-11-13 CH CH148354D patent/CH148354A/en unknown
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