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AT230881B - Process for the preparation of propionic acid-3,4-dichloroanilide - Google Patents

Process for the preparation of propionic acid-3,4-dichloroanilide

Info

Publication number
AT230881B
AT230881B AT755662A AT755662A AT230881B AT 230881 B AT230881 B AT 230881B AT 755662 A AT755662 A AT 755662A AT 755662 A AT755662 A AT 755662A AT 230881 B AT230881 B AT 230881B
Authority
AT
Austria
Prior art keywords
sep
propionic acid
dichloroanilide
preparation
chlorobenzene
Prior art date
Application number
AT755662A
Other languages
German (de)
Inventor
Werner Dr Schaefer
Richard Dr Wegler
Original Assignee
Bayer 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 Bayer Ag filed Critical Bayer Ag
Application granted granted Critical
Publication of AT230881B publication Critical patent/AT230881B/en

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

Description

  

   <Desc/Clms Page number 1> 
 



  Verfahren zur Herstellung von Propionsäure-3, 4-dichloranilid 
 EMI1.1 
 
 EMI1.2 
 
<tb> 
<tb> 



  4-dichlor-Analyse <SEP> : <SEP> 
<tb> Gef. <SEP> : <SEP> C <SEP> : <SEP> 49, <SEP> 50% <SEP> H <SEP> : <SEP> 4, <SEP> 18% <SEP> 
<tb> 49. <SEP> 59alto <SEP> 4, <SEP> 21%
<tb> Ber. <SEP> : <SEP> C <SEP> : <SEP> 49, <SEP> 55% <SEP> H <SEP> : <SEP> 4, <SEP> 13% <SEP> 
<tb> 
 

 <Desc/Clms Page number 2> 

 b) Die Aufarbeitung der Chlorbenzollösung kann auch so'erfolgen : Im Wasserstrahlvakuum werden41 Chlorbenzol mit dem restlichen Propionsäurechlorid abdestilliert, dann wird die hinterbleibende Lösung auf 5-10 C abgekühlt und einige Stunden auf dieser Temperatur gehalten. Beim Filtrieren werden   47%     d. Th.   des Propionsäure-3, 4-dichloranilids vom   F : 87 - 9l0C   erhalten.

   Wird die Mutterlauge aus dieser Reaktion in einem nächsten Versuch wieder eingesetzt, so steigt in diesem Ansatz die Ausbeute weiter an und das Produkt schmilzt bei   89-92 C.   



    PATENTANSPRÜCHE :    
1. Verfahren zur Herstellung von Propionsäure-3, 4-dichloranilid, dadurch gekennzeichnet, dass Propionsäure und 3, 4-Dichloranilin in Chlorbenzol in Gegenwart eines Überschusses Thionylchlorid umgesetzt werden.



   <Desc / Clms Page number 1>
 



  Process for the preparation of propionic acid-3,4-dichloroanilide
 EMI1.1
 
 EMI1.2
 
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  4-dichloro analysis <SEP>: <SEP>
<tb> Found <SEP>: <SEP> C <SEP>: <SEP> 49, <SEP> 50% <SEP> H <SEP>: <SEP> 4, <SEP> 18% <SEP>
<tb> 49. <SEP> 59alto <SEP> 4, <SEP> 21%
<tb> Ber. <SEP>: <SEP> C <SEP>: <SEP> 49, <SEP> 55% <SEP> H <SEP>: <SEP> 4, <SEP> 13% <SEP>
<tb>
 

 <Desc / Clms Page number 2>

 b) The chlorobenzene solution can also be worked up as follows: Chlorobenzene and the remaining propionic acid chloride are distilled off in a water jet vacuum, then the remaining solution is cooled to 5-10 ° C. and kept at this temperature for a few hours. When filtering, 47% d. Th. Of propionic acid-3, 4-dichloroanilide from F: 87-910C.

   If the mother liquor from this reaction is used again in a next experiment, the yield increases further in this batch and the product melts at 89-92 ° C.



    PATENT CLAIMS:
1. A process for the preparation of propionic acid-3,4-dichloroanilide, characterized in that propionic acid and 3,4-dichloroaniline are reacted in chlorobenzene in the presence of an excess of thionyl chloride.

Claims (1)

2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass Propionsäure und Thionylchlorid in 20%obigem Überschuss eingesetzt werden. 2. The method according to claim 1, characterized in that propionic acid and thionyl chloride are used in 20% of the above excess. 3. Verfahren nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, dass die Reaktion bei etwa 90 bis 950C durchgeführt wird. 3. Process according to claims 1 and 2, characterized in that the reaction is carried out at about 90 to 950C.
AT755662A 1961-11-10 1962-09-24 Process for the preparation of propionic acid-3,4-dichloroanilide AT230881B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE230881X 1961-11-10

Publications (1)

Publication Number Publication Date
AT230881B true AT230881B (en) 1963-12-30

Family

ID=5872760

Family Applications (1)

Application Number Title Priority Date Filing Date
AT755662A AT230881B (en) 1961-11-10 1962-09-24 Process for the preparation of propionic acid-3,4-dichloroanilide

Country Status (1)

Country Link
AT (1) AT230881B (en)

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