CH167377A - Process for the preparation of 1-acetylamino-2,4-dimethylbenzene-5-sulfonic acid chloride. - Google Patents

Process for the preparation of 1-acetylamino-2,4-dimethylbenzene-5-sulfonic acid chloride.

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Publication number
CH167377A
CH167377A CH167377DA CH167377A CH 167377 A CH167377 A CH 167377A CH 167377D A CH167377D A CH 167377DA CH 167377 A CH167377 A CH 167377A
Authority
CH
Switzerland
Prior art keywords
dimethylbenzene
acetylamino
preparation
sulfonic acid
acid chloride
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 CH167377A publication Critical patent/CH167377A/en

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

Description

  

      Verfahren    zur Darstellung von     1-Acetylamino-2.4-dimethylbenzol-6-sulfonsäurechlorid.       Es wurde gefunden, dass man     1-Acetyl-          amino-2.        4-dimethylbenzol-5-sulf        onsäurechlo-          rid    dadurch erhalten kann, dass man auf     1-          Acetylamino-2.4-dimethylbenzol        Chlorsul-          fonsäure    einwirken lässt.  



  <I>Beispiel:</I>  163 Gewichtsteile     1-Acetylamino-2.4-di-          methylbenzol    werden in 978 Gewichtsteile       Chlorsulfonsäure    bei 20 bis 30   eingetragen  und etwa 20 Stunden bei Zimmertemperatur  verrührt. Das Reaktionsgemisch wird dann  auf 3000 Gewichtsteile Eis gegeben, das da  bei in fester Form sich     abscheidene        1-Acetyl-          amino-2    .     4-dimethylbenzol-5-sulfonsäurechlo-          rid    wird von der sauren Brühe abgesaugt  und mit kaltem Wasser säurefrei gewaschen.

    Aus Aceton kristallisiert     1-Acetylamino-2.    4-         dimethylbenzol-5-sulfonsäurechlorid    in farb  losen vielseitigen Kristallen vom Schmelz  punkt 147  . Es soll als Zwischenprodukt  zum Aufbau von Farbstoffen, Arzneimitteln  usw. Verwendung finden.



      Process for the preparation of 1-acetylamino-2,4-dimethylbenzene-6-sulfonic acid chloride. It has been found that 1-acetyl-amino-2. 4-dimethylbenzene-5-sulfonic acid chloride can be obtained by letting chlorosulfonic acid act on 1-acetylamino-2,4-dimethylbenzene.



  <I> Example: </I> 163 parts by weight of 1-acetylamino-2,4-dimethylbenzene are added to 978 parts by weight of chlorosulfonic acid at 20 to 30 times and stirred for about 20 hours at room temperature. The reaction mixture is then poured onto 3000 parts by weight of ice, the 1-acetyl-amino-2 which separates out in solid form. 4-dimethylbenzene-5-sulfonic acid chloride is suctioned off from the acidic broth and washed acid-free with cold water.

    1-Acetylamino-2 crystallizes from acetone. 4- dimethylbenzene-5-sulfonic acid chloride in colorless, versatile crystals with a melting point of 147. It is intended to be used as an intermediate in the synthesis of dyes, drugs, etc.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung von 1-Acetyl- amino-2. 4-dimethylbenzol-5-sulf onsäurechlo- rid, dadurch gekennzeichnet, dass man auf 1-Acetylamino-2.4-dimethylbenzol Chlorsul- fonsäure einwirken lässt. Aus Aceton kristallisiert das neue Pro dukt in farblosen vielseitigen Kristallen vom Schmelzpunkt 147 . PATENT CLAIM: Process for the preparation of 1-acetyl-amino-2. 4-dimethylbenzene-5-sulfonyl chloride, characterized in that chlorosulfonic acid is allowed to act on 1-acetylamino-2,4-dimethylbenzene. The new product crystallizes from acetone in colorless, versatile crystals with a melting point of 147.
CH167377D 1931-09-09 1932-08-26 Process for the preparation of 1-acetylamino-2,4-dimethylbenzene-5-sulfonic acid chloride. CH167377A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE167377X 1931-09-09
CH163888T 1932-08-26

Publications (1)

Publication Number Publication Date
CH167377A true CH167377A (en) 1934-02-15

Family

ID=25717874

Family Applications (1)

Application Number Title Priority Date Filing Date
CH167377D CH167377A (en) 1931-09-09 1932-08-26 Process for the preparation of 1-acetylamino-2,4-dimethylbenzene-5-sulfonic acid chloride.

Country Status (1)

Country Link
CH (1) CH167377A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2440117A (en) * 1944-03-11 1948-04-20 Sun Chemical Corp Process for preparing sulfonamides
US2441671A (en) * 1944-03-11 1948-05-18 Sun Chemical Corp Process for preparing sulfonamides

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2440117A (en) * 1944-03-11 1948-04-20 Sun Chemical Corp Process for preparing sulfonamides
US2441671A (en) * 1944-03-11 1948-05-18 Sun Chemical Corp Process for preparing sulfonamides

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