CH148345A - 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
- CH148345A CH148345A CH148345DA CH148345A CH 148345 A CH148345 A CH 148345A CH 148345D A CH148345D A CH 148345DA CH 148345 A CH148345 A CH 148345A
- Authority
- CH
- Switzerland
- Prior art keywords
- oxy
- carboxylic acid
- preparation
- phenylarylamine
- acid
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Darstellung einer m-Ogy-phenylarylamincarbonsäur e. Vorliegendes Patent bezieht sich auf ein Verfahren zur Herstellung einer m-Oxyphenyl- arylainincarbonsäure, dadurch gekennzeichnet, dass man ein Alkalisalz von 3-Oxy-4'-methyl- diphenylamin mit Kohlensäure unter Druck erhitzt.
Die 3-Oxy-4'-methyldipheriylamincarbon- säure ist ein graues Pulver, das nach dem Umkristallisieren aus Xylol den Schmelzpunkt 18b-186 0 C zeigt. Ihre alkoholische Lösung gibt mit verdünnter Eiserichloridlösung eine intensive kirschrote Färbung. Das Produkt soll als Zwischenprodukt zur Herstellung von Farbstoffen verwendet werden.
<I>Beispiel:</I> 895,5 Teile 3-Ogy-4'-rnethyldiphenylamin wei-dari mit 300,6 Teilen Ätzkali 83,8 % ig und<B>1500</B> Teilen Wasser in einem mit Rühr werk versehenen Autoklaven in Lösung ge bracht und das Wasser im Vakuum bis zur völligen Trockenheit des gebildeten Kalium salzes abdestilliert. Nach dem Erkalten der Reaktionsmasse leitet man Kohlensäure bis zu einem Druck von 10 Atin. ein und erhitzt auf 170 0 C während 16 Stunden.
Die erkal tete Schmelze wird in heissem Wasser gelöst, filtriert und die gebildete Carbonsäure mit Salzsäure gefällt. Zur weitern Reinigung kann dieselbe aus Soda oder Natriumacetat unige löst werden.
Process for the preparation of a m-Ogy-phenylarylamine carboxylic acid e. The present patent relates to a process for the preparation of an m-oxyphenyl-arylainincarboxylic acid, characterized in that an alkali metal salt of 3-oxy-4'-methyldiphenylamine is heated with carbonic acid under pressure.
The 3-oxy-4'-methyldipheriylamine carboxylic acid is a gray powder which, after recrystallization from xylene, has a melting point of 18b-186 ° C. Their alcoholic solution gives an intense cherry-red color with a dilute solution of iron chloride. The product is intended to be used as an intermediate in the manufacture of dyes.
<I> Example: </I> 895.5 parts of 3-Ogy-4'-methyldiphenylamine white with 300.6 parts of 83.8% caustic potash and <B> 1500 </B> parts of water in one with stirring The autoclave provided in the factory is brought into solution and the water is distilled off in vacuo until the potassium salt formed is completely dry. After the reaction mass has cooled down, carbonic acid is passed in up to a pressure of 10 atoms. and heated to 170 ° C. for 16 hours.
The cooled melt is dissolved in hot water, filtered and the carboxylic acid formed is precipitated with hydrochloric acid. For further cleaning, it can be dissolved in some soda or sodium acetate.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE148345X | 1928-12-01 | ||
CH146551T | 1929-11-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH148345A true CH148345A (en) | 1931-07-15 |
Family
ID=25714882
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH148345D CH148345A (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) | CH148345A (en) |
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1929
- 1929-11-13 CH CH148345D patent/CH148345A/en unknown
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