CH250801A - Process for the preparation of a trihaloacrylic acid ester. - Google Patents
Process for the preparation of a trihaloacrylic acid ester.Info
- Publication number
- CH250801A CH250801A CH250801DA CH250801A CH 250801 A CH250801 A CH 250801A CH 250801D A CH250801D A CH 250801DA CH 250801 A CH250801 A CH 250801A
- Authority
- CH
- Switzerland
- Prior art keywords
- sep
- acid
- ester
- trihaloacrylic
- compound
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C69/00—Esters of carboxylic acids; Esters of carbonic or haloformic acids
- C07C69/62—Halogen-containing esters
- C07C69/65—Halogen-containing esters of unsaturated acids
- C07C69/653—Acrylic acid esters; Methacrylic acid esters; Haloacrylic acid esters; Halomethacrylic acid esters
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Herstellung eines Trihalogenacrylsäureesters. Gegenstand vorliegenden Patentes ist ein Verfahren zur Herstellung eines Trihalogen- acrylsäureesters. Das Verfahren ist dadurch gekennzeichnet, dass man eine Verbindung der Formel
EMI0001.0010
auf eine Verbindung der Formel C13C-C732--Y worin. X und Y reaktionsfähige,
mit Aus nahme eines in. einem von ihnen enthaltenen Sauerstoffatoms, sich bei der Reaktion ab spaltende Reste bedeuten, einwirken lässt. Die entstandene neue Verbindung, der Trichlor- acrylsäure-,ss,ss,ss-trichloräthylester, siedet bei 136-138 unter 13 mm Druck. Sie soll als Insektizid Verwendung finden.
<I>Beispiel:</I> Ein Gemisch von 12 Teilen Trichloracryl- säurechlorid und 9 Teilen Trichloräthanol wird während einigen Stunden am Rückfluss- h-ühler auf 130-140 erhitzt. Das kalte Reaktionsprodukt giesst man in Wasser, nimmt das ausgeschiedene 01 in Äther auf,
wäscht die ätherische Lösung mit viel Wasser und trocknet sie über Natriumsulfat. Nach dem Abdestillieren des Äthers wird der Rückstand im Vakuum fraktioniert und geht, unter 13 mm Druck bei 136-138 über. Die Reaktion kann ferner vorteilhaft in Gegen- wart säurebindender Mittel, wie z. B. Pyri- din, vorgenommen werden.
Statt vom Trichloracrylsäurechlorid kann man auch vom Anhydrid oder von einem Ester der Trichloracrylsäure mit einem nie deren Alkohol ausgehen und diese mit Tri- chloräthanol umsetzen.
Zum gleichen Endprodukt gelangt man auch durch Einwirkenlassen von einem tri- chloracrylsauren Salz auf einen reaktions fähigen Frater des Trichloräthanols. Solche reeaWonsfähige Ester des Trichloräthanols sind z. B. Ester mit Illalogenwasserstoff- säuren oder aromatischen Sulfonsäuren.
Process for the preparation of a trihaloacrylic acid ester. The present patent is a process for the preparation of a trihalo acrylic acid ester. The process is characterized in that a compound of the formula
EMI0001.0010
to a compound of the formula C13C-C732 - Y wherein. X and Y reactive,
with the exception of an oxygen atom contained in one of them, which means splitting off radicals in the reaction, can act. The resulting new compound, the trichloroacrylic acid, ss, ss, ss-trichloroethyl ester, boils at 136-138 under 13 mm pressure. It is said to be used as an insecticide.
<I> Example: </I> A mixture of 12 parts of trichloroacrylic acid chloride and 9 parts of trichloroethanol is heated to 130-140 for a few hours in a reflux heater. The cold reaction product is poured into water, the precipitated 01 is taken up in ether,
wash the essential solution with plenty of water and dry it over sodium sulfate. After the ether has been distilled off, the residue is fractionated in vacuo and passes over at 136-138 under 13 mm pressure. The reaction can also be advantageous in the presence of acid-binding agents, such as. B. pyridine, are made.
Instead of the trichloroacrylic acid chloride, one can also start from the anhydride or from an ester of trichloroacrylic acid with an alcohol and react this with trichloroethanol.
The same end product is also obtained by allowing a trichloroacrylic acid salt to act on a reactive frater of trichloroethanol. Such ready-to-use esters of trichloroethanol are z. B. Esters with illalogenous acids or aromatic sulfonic acids.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH244274T | 1944-10-30 | ||
CH250801T | 1944-10-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH250801A true CH250801A (en) | 1947-09-15 |
Family
ID=25728914
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH250801D CH250801A (en) | 1944-10-30 | 1944-10-30 | Process for the preparation of a trihaloacrylic acid ester. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH250801A (en) |
-
1944
- 1944-10-30 CH CH250801D patent/CH250801A/en unknown
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