CH143280A - Process for the preparation of a p-oxyaryl-B-naphthylamino-carboxylic acid. - Google Patents
Process for the preparation of a p-oxyaryl-B-naphthylamino-carboxylic acid.Info
- Publication number
- CH143280A CH143280A CH143280DA CH143280A CH 143280 A CH143280 A CH 143280A CH 143280D A CH143280D A CH 143280DA CH 143280 A CH143280 A CH 143280A
- Authority
- CH
- Switzerland
- Prior art keywords
- preparation
- carboxylic acid
- oxy
- oxyaryl
- naphthylamino
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
EMI0001.0001
Yerfahren <SEP> zur <SEP> Darstellung <SEP> einer <SEP> p-Oxyai-yl-@-naplitliylamino-e:irbonsäure. Vorliegendes Patent bezieht sich auf ein Verfahren zur Darstellung einer 2-(4'- 01y - ?'- inethyl - phenylamino) - naphthalin- carbon säure, dadurch gekennzeichnet, dass man ein Alkalisalz des 2-(-1'-Oxy-?'-methyl- hlienylamino)
-naphtlia.lins unter Druck mit Kohlensire auf höhere Temperatur erhitzt.
Die so erhaltene neue Carbonsäure stellt. -m Toluol umkristallisiert gelbe Nadeln dar voni Schmelzpunkt 213-214 . Ihre ver- (liinnte alkoholische Lösung wird naeli Zu- > < < tz von Eisenchlorid dunkelviolett.
Das Produkt. soll als Zwischenprodukt zur Her- stf,lluii-, von Farbstoffen verwendet werden. Beispiel: 2-19 Teile 2'-(4'-Oxy-2'-methyl-pheiiyl- a minn )
-naphthalin werden mit 66 Teilen Ätzkali 83%ig in 750 Teilen Wasser ge- löst. Die so erhaltene Lösung wird im Va- kuum und die Masse nach dein Erkalten mit Kohlensäure unter allmählicher Steigerung des Druckes auf 25 Atm. ge sättigt, langsam bis auf<B>170'</B> erhitzt und bei dieser Temperatur während 1\? Stunden belassen.
Die Aufarbeitung der erkalteten Masse erfolgt durch Lösen in Wasser, Fil trieren und Fällen mit verdünnter Salzsäure. Die erhaltene Rohsäure kann durch Lösen in verdünntem essigsauren Natron und noch maliges Fällen gereinigt werden.
EMI0001.0001
Yerfahren <SEP> for <SEP> representation <SEP> of a <SEP> p-oxyai-yl - @ - naplitliylamino-e: irboxylic acid. The present patent relates to a process for the preparation of a 2- (4'- 01y -? '- ynethyl - phenylamino) - naphthalenecarboxylic acid, characterized in that an alkali salt of 2 - (- 1'-oxy-?' -methyl- hlienylamino)
-naphtlia.lins heated to a higher temperature under pressure with carbon dioxide.
The new carboxylic acid thus obtained provides. Yellow needles recrystallized from toluene, melting point 213-214. Their combined alcoholic solution becomes dark purple after the addition of ferric chloride.
The product. is intended to be used as an intermediate product for the manufacture of dyes. Example: 2-19 parts of 2 '- (4'-Oxy-2'-methyl-pheiiyl- a minn)
Naphthalene is dissolved with 66 parts of 83% caustic potash in 750 parts of water. The solution thus obtained is in a vacuum and the mass after cooling with carbonic acid while gradually increasing the pressure to 25 atm. saturated, slowly heated to <B> 170 '</B> and kept at this temperature for 1 \? Leave hours.
The cold mass is worked up by dissolving it in water, filtering it and precipitating it with dilute hydrochloric acid. The raw acid obtained can be purified by dissolving it in dilute sodium acetate and precipitating it again.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE670852X | 1928-03-06 | ||
CH141533T | 1929-03-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH143280A true CH143280A (en) | 1930-10-31 |
Family
ID=25713779
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH143281D CH143281A (en) | 1928-03-06 | 1929-03-05 | Process for the preparation of a p-oxyaryl-B-naphthylamino-carboxylic acid. |
CH143280D CH143280A (en) | 1928-03-06 | 1929-03-05 | Process for the preparation of a p-oxyaryl-B-naphthylamino-carboxylic acid. |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH143281D CH143281A (en) | 1928-03-06 | 1929-03-05 | Process for the preparation of a p-oxyaryl-B-naphthylamino-carboxylic acid. |
Country Status (1)
Country | Link |
---|---|
CH (2) | CH143281A (en) |
-
1929
- 1929-03-05 CH CH143281D patent/CH143281A/en unknown
- 1929-03-05 CH CH143280D patent/CH143280A/en unknown
Also Published As
Publication number | Publication date |
---|---|
CH143281A (en) | 1930-10-31 |
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