CH298741A - Process for the preparation of a heterocyclic carbamic acid derivative. - Google Patents

Process for the preparation of a heterocyclic carbamic acid derivative.

Info

Publication number
CH298741A
CH298741A CH298741DA CH298741A CH 298741 A CH298741 A CH 298741A CH 298741D A CH298741D A CH 298741DA CH 298741 A CH298741 A CH 298741A
Authority
CH
Switzerland
Prior art keywords
dimethyl
carbamic acid
preparation
acid derivative
heterocyclic
Prior art date
Application number
Other languages
German (de)
Inventor
Ag J R Geigy
Original Assignee
Ag J R Geigy
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 Ag J R Geigy filed Critical Ag J R Geigy
Publication of CH298741A publication Critical patent/CH298741A/en

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Description

  

      Verfahren    zur Herstellung- eines     heterocyclischen        Carbaminsäurederivates.       Gegenstand vorliegenden Patentes ist ein  Verfahren zur     Herstellung    eines     heterocycli-          schen        Carbaminsäurederivates.    Das Verfahren  ist dadurch gekennzeichnet, dass man     2,4-Di-          methyl-pyrimidon-(6)    mit     Phosgen    zum Chlor  ameisensäureester des     2,

  4-Dimethyl-6-oxy-          pyrimidins    umsetzt und diesen mit     Dimethyl-          amin    in den entsprechenden     Dimethyl-carb-          aminsäureester    überführt.  



  Die erhaltene neue Verbindung, das     2,4-          Dimethyl-pyrimidyl-(6)-dimethylcarbamat,    sie  det unter 0,1 mm Druck bei 110 . Sie soll als  Wirkstoff für Schädlingsbekämpfungsmittel  Verwendung finden.    <I>Beispiel:</I>    24 Teile     2,4-Dimethyl-pyrimidon-(6)    wer  den in 250 Teilen absolutem Benzol verrührt  und das Gemisch     unter    Rühren und gelinder  Kühlung langsam zu einer Lösung von 10 Tei  len     Phosgen    in 60 Teilen absolutem Benzol  gegeben. Man rührt eine weitere     Stunde    bei  Raumtemperatur und saugt vom ausgefallenen  Hydrochlorid des     2,4-Dimethyl-6-oxy-pyrimi-          dins    ab.

      Das     Filtrat    tropft man     unter    Rühren und  Kühlen bei etwa 20  zur 135 Teilen 18,5 %     igei          benzolischer        Dimethylaminlösung    und rührt  einige Stunden bei Raumtemperatur weiter.  Die     benzolisohe        Lösung    wird mehrmals mit  verdünnter kalter Natronlauge und hierauf mit  Wasser neutral gewaschen. Nach dem Ab  destillieren des Benzols verbleibt das     2,4-Di-          methyl-pyrimidyl-(6)-dimethylcarbamat    als Öl,  welches     unter    0,1 mm Druck bei 110  siedet.



      Process for the preparation of a heterocyclic carbamic acid derivative. The present patent relates to a process for the preparation of a heterocyclic carbamic acid derivative. The process is characterized in that 2,4-dimethyl-pyrimidone- (6) is used with phosgene to give the chloroformic acid ester of 2,

  4-dimethyl-6-oxy-pyrimidine is reacted and this is converted with dimethylamine into the corresponding dimethyl-carbamic acid ester.



  The new compound obtained, the 2,4-dimethyl-pyrimidyl- (6) -dimethyl carbamate, it det under 0.1 mm pressure at 110. It should be used as an active ingredient for pesticides. <I> Example: </I> 24 parts of 2,4-dimethyl-pyrimidone- (6) are stirred in 250 parts of absolute benzene and the mixture is slowly stirred and gently cooled to a solution of 10 parts of phosgene in 60 parts given absolute benzene. The mixture is stirred for a further hour at room temperature and the precipitated hydrochloride of 2,4-dimethyl-6-oxy-pyrimidine is filtered off with suction.

      The filtrate is added dropwise with stirring and cooling at about 20 to 135 parts of 18.5% strength benzene dimethylamine solution and stirring is continued for a few hours at room temperature. The benzene solution is washed several times with dilute cold sodium hydroxide solution and then with water until neutral. After the benzene has been distilled off, the 2,4-dimethylpyrimidyl- (6) -dimethylcarbamate remains as an oil, which boils at 110 under 0.1 mm pressure.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines hetero- cyclischen Carbaminsätirederi-#-ates, dadurch gekennzeichnet, dass man 2,4-Dimethyl-pyrimi- don-(6) mit Phosgen zum Chlorameisensäure ester des 9,4-Dimethyl-6-oxy-pyrimidins iun- setzt und diesen mit Dimethylamin in den entsprechenden Dimetluyl-carbaminsäureester überführt. PATENT CLAIM: Process for the production of a heterocyclic Carbaminsätirederi - # - ates, characterized in that 2,4-dimethyl-pyrimidone- (6) with phosgene to the chloroformic acid ester of 9,4-dimethyl-6-oxy-pyrimidine and this is converted with dimethylamine into the corresponding dimethylcarbamic acid ester. Die erhaltene neue Verbindung, das 2,4- Dimethyl-pyrimidyl-(6)-dimethylcarbamat, sie det unter 0,1 mm Druck bei 110 . The new compound obtained, the 2,4-dimethyl-pyrimidyl- (6) -dimethyl carbamate, it det under 0.1 mm pressure at 110.
CH298741D 1951-07-16 1951-07-16 Process for the preparation of a heterocyclic carbamic acid derivative. CH298741A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH296582T 1951-07-16
CH298741T 1951-07-16

Publications (1)

Publication Number Publication Date
CH298741A true CH298741A (en) 1954-05-15

Family

ID=25733704

Family Applications (1)

Application Number Title Priority Date Filing Date
CH298741D CH298741A (en) 1951-07-16 1951-07-16 Process for the preparation of a heterocyclic carbamic acid derivative.

Country Status (1)

Country Link
CH (1) CH298741A (en)

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