CH137948A - Process for the preparation of a carboxyamidobenzene-o-thioglycolic acid. - Google Patents

Process for the preparation of a carboxyamidobenzene-o-thioglycolic acid.

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Publication number
CH137948A
CH137948A CH137948DA CH137948A CH 137948 A CH137948 A CH 137948A CH 137948D A CH137948D A CH 137948DA CH 137948 A CH137948 A CH 137948A
Authority
CH
Switzerland
Prior art keywords
thioglycolic acid
preparation
chlorobenzene
carboxyamidobenzene
acid
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH137948A publication Critical patent/CH137948A/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Verfahren zur Darstellung einer     Carbogyamidobenzol-o-thioglykolsäure.       Gegenstand dieses Patentes ist ein Ver  fahren zur Darstellung der     1-Carboxyamido-          4-chlorbenzol-2-thioglykolsäure,    welches da  durch gekennzeichnet ist, dass man auf die       1-Cyan-4-chlorbenzol-2-thioglykolsäure    saure       Verseifungsmittel    einwirken lässt.  



  <I>Beispiel:</I>  1 0 Gewichtsteile     1-Cyan-4-chlorbenzol-2-          thioglykolsäure,    die man beispielsweise nach  den in den Schweizer Patentschriften     Nr.71331     und 72277 beschriebenen Verfahren erhält,  werden in 150 Volumenteilen Schwefelsäure  von 66      B6    gelöst und nach mehrtägigem  Stehen bei Zimmertemperatur in Wasser ge  gossen. Die     1-Carboxyamido-4-chlorbenzol-2-          thioglykolsäure    scheidet sich in Nadeln vom  F. P. 206  ab. Das erhaltene Produkt dient  als Zwischenprodukt zur Herstellung von       Farbstoffen.  



  Process for the preparation of a carbogyamidobenzene-o-thioglycolic acid. The subject of this patent is a process for the preparation of 1-carboxyamido-4-chlorobenzene-2-thioglycolic acid, which is characterized by the fact that 1-cyano-4-chlorobenzene-2-thioglycolic acid is allowed to act with acidic saponifying agents.



  <I> Example: </I> 1 0 parts by weight of 1-cyano-4-chlorobenzene-2-thioglycolic acid, which is obtained, for example, by the process described in Swiss patents 71331 and 72277, are converted into 150 parts by volume of sulfuric acid from 66 B6 dissolved and poured into water after standing for several days at room temperature. The 1-carboxyamido-4-chlorobenzene-2-thioglycolic acid separates from the F. P. 206 in needles. The product obtained serves as an intermediate for the production of dyes.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung der 1-Carboxy- amido-4-chlorbenzol-2-thioglykolsäure, da durch gekennzeichnet, dass man auf die 1- Cyan-4-chlorbenzol-2-thioglykolsäure saure Verseifungsmittel einwirken lässt. Die 1 Carboxyamido-4-chlorbenzol-2-thioglykolsäure scheidet sich in Nadeln vom F. P. 206 ab und dient als Zwischenprodukt zur Herstel lung von Farbstoffen. UNTERANSPRUCH: Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man die Reaktion mit Schwefelsäure von 66 Be durch mehrtägiges Stehen bei Zimmertemperatur bewirkt. PATENT CLAIM: Process for the preparation of 1-carboxy-amido-4-chlorobenzene-2-thioglycolic acid, characterized in that acidic saponifying agents are allowed to act on 1-cyano-4-chlorobenzene-2-thioglycolic acid. The 1-carboxyamido-4-chlorobenzene-2-thioglycolic acid separates in needles from the F. P. 206 and serves as an intermediate product for the production of dyes. SUBSTANTIAL CLAIM: Process according to patent claim, characterized in that the reaction with sulfuric acid of 66 Be is effected by standing for several days at room temperature.
CH137948D 1927-04-16 1928-04-14 Process for the preparation of a carboxyamidobenzene-o-thioglycolic acid. CH137948A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE137948X 1927-04-16
CH134942T 1928-04-14

Publications (1)

Publication Number Publication Date
CH137948A true CH137948A (en) 1930-01-31

Family

ID=25712396

Family Applications (1)

Application Number Title Priority Date Filing Date
CH137948D CH137948A (en) 1927-04-16 1928-04-14 Process for the preparation of a carboxyamidobenzene-o-thioglycolic acid.

Country Status (1)

Country Link
CH (1) CH137948A (en)

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