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AT30246B - Process for the preparation of CC dialkylbarbituric acids. - Google Patents

Process for the preparation of CC dialkylbarbituric acids.

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Publication number
AT30246B
AT30246B AT30246DA AT30246B AT 30246 B AT30246 B AT 30246B AT 30246D A AT30246D A AT 30246DA AT 30246 B AT30246 B AT 30246B
Authority
AT
Austria
Prior art keywords
preparation
acids
dialkylbarbituric acids
dialkylbarbituric
desc
Prior art date
Application number
Other languages
German (de)
Inventor
Wilhelm Dr Traube
Original Assignee
Wilhelm Dr Traube
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 Wilhelm Dr Traube filed Critical Wilhelm Dr Traube
Application granted granted Critical
Publication of AT30246B publication Critical patent/AT30246B/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.   



   Durch das   Stamm-Patent   Nr. 27731 ist ein Verfahren zur Darstellung von CC-Dialkylbarbitursäuren geschützt, welches darin besteht, dass man die durch Erhitzen von Dialkyl-   ntalonylchloriden   mit Urethanen   entstehenden Diurethanderivate   der Dialkylmalonsäuren durch Einwirkung von Metallalkoholaten in der Warme in die zyklischen Verbindungen Überführt. 
 EMI1.1 
 und giesst es in ein   Gemisch \-ois   und Wasser. Die bei   der Reaktion entstandene   Diäthylbarbitursäure scheidet sich alsbald kristallinisch ab. 



   Man kann in obigem Beispiel auch gewöhnliche. konzentrierte Schwefelsäure allein 
 EMI1.2 
 auf   10') bis 120"zu erhitzen.   



   Beispiel 3 : 1 Teil Dipropylmalonyldiurethan wird mit ; ; bis 4 Teilen   rauchender   
 EMI1.3 
 wärmt und darauf auf Eis gegossen. Hiebei scheidet sich Dipropylbarbitursäure als bald erstarrendes 01 ab. 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



   <Desc / Clms Page number 1>
 



  Process for the preparation of CC dialkylbarbituric acids.



   The parent patent No. 27731 protects a process for the preparation of CC dialkylbarbituric acids, which consists in converting the diurethane derivatives of dialkylmalonic acids formed by heating dialkylntalonyl chlorides with urethanes into the cyclic compounds by the action of metal alcoholates in the warm .
 EMI1.1
 and pour it into a mixture of ois and water. The diethylbarbituric acid formed during the reaction soon separates out in crystalline form.



   In the above example one can also use ordinary. concentrated sulfuric acid alone
 EMI1.2
 to 10 ') to 120 ".



   Example 3: 1 part Dipropylmalonyldiurethan is with; ; up to 4 parts smoking
 EMI1.3
 warms and then poured onto ice. Dipropylbarbituric acid is deposited as 01 which soon solidifies.

** WARNING ** End of DESC field may overlap beginning of CLMS **.

Claims (1)

PATENT-ANSPRUCH : EMI1.4 **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: EMI1.4 ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT30246D 1904-11-14 1905-11-29 Process for the preparation of CC dialkylbarbituric acids. AT30246B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE172885D 1904-11-14

Publications (1)

Publication Number Publication Date
AT30246B true AT30246B (en) 1907-10-10

Family

ID=5690518

Family Applications (1)

Application Number Title Priority Date Filing Date
AT30246D AT30246B (en) 1904-11-14 1905-11-29 Process for the preparation of CC dialkylbarbituric acids.

Country Status (1)

Country Link
AT (1) AT30246B (en)

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