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
Links
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- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
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)
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) |
-
1951
- 1951-07-16 CH CH298741D patent/CH298741A/en unknown
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