AT35662B - Process for the preparation of CC dialkylbarbituric acids. - Google Patents

Process for the preparation of CC dialkylbarbituric acids.

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Publication number
AT35662B
AT35662B AT35662DA AT35662B AT 35662 B AT35662 B AT 35662B AT 35662D A AT35662D A AT 35662DA AT 35662 B AT35662 B AT 35662B
Authority
AT
Austria
Prior art keywords
preparation
dialkylbarbituric acids
dialkylbarbituric
acids
parts
Prior art date
Application number
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German (de)
Original Assignee
Farbenfab Vorm Bayer F & Co
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Publication of AT35662B publication Critical patent/AT35662B/en

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

Description

  

   <Desc/Clms Page number 1> 
 



  Verfahren zur Darstellung von CC-Dialkylbarbitursäuren. 



   In der   franxösischen Patentschrift Nr. 355933 ist ein Verfahren   zur Darstellung von CC-Dialkylbarbitursäuen beschrieben, welches darin besteht, dass man die durch Kondensation 
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 oder der anderthalbfachen Gewichtsmenge des angewandten Diurethans erfogen. Die Ausbeuten an Dialkylbarbitursäuren werden durch diese Zusätze erhöht. 



   Beispiel 1 : Diäthylmalonyldiurethan (erhalten aus Diäthylmalonylchlorid und Athyl- 
 EMI1.4 
 filtriert und aus dem Filtrat das   Ammoniak   weggekocht. Beim Abkühlen scheidet sich die CC-Diäthylbarbitursäure aus, die dann noch aus   Wasser umkrystallisiert wird.   



   Beispiel 2 : 10 Teile   Diäthy ! ma ! ony ! diurethan und 7 Teile Harnstoff werden 5 Stunden   lang auf 200-205  erhitzt und die Reaktionsmasse dann wie in Beispiel 1 beschrieben aufgearbeitet. 



   Beispiel 3 : 10 Teile Dimethylmalonyldirethan und   15 Teite Diphenylkarl) onat werden   
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**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



   <Desc / Clms Page number 1>
 



  Process for the preparation of CC dialkylbarbituric acids.



   In the French patent no. 355933 a process for the preparation of CC-Dialkylbarbitursäuen is described, which consists in that one by condensation
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 or one and a half times the weight of the diurethane used. The yields of dialkylbarbituric acids are increased by these additives.



   Example 1: Diethylmalonyldiurethane (obtained from diethylmalonyl chloride and ethyl
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 filtered and the ammonia boiled away from the filtrate. On cooling, the CC diethylbarbituric acid separates out, which is then recrystallized from water.



   Example 2: 10 parts Diethy! ma! ony! Diurethane and 7 parts of urea are heated to 200-205 for 5 hours and the reaction mass is then worked up as described in Example 1.



   Example 3: 10 parts of dimethylmalonyldirethane and 15 parts of diphenyl carbonate are used
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** WARNING ** End of DESC field may overlap beginning of CLMS **.

Claims (1)

**WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT35662D 1905-12-07 1906-07-04 Process for the preparation of CC dialkylbarbituric acids. AT35662B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE183628D 1905-12-07

Publications (1)

Publication Number Publication Date
AT35662B true AT35662B (en) 1908-12-28

Family

ID=5718643

Family Applications (1)

Application Number Title Priority Date Filing Date
AT35662D AT35662B (en) 1905-12-07 1906-07-04 Process for the preparation of CC dialkylbarbituric acids.

Country Status (1)

Country Link
AT (1) AT35662B (en)

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