CH248399A - Process for the preparation of a 4-chloro-benzenesulfonamide. - Google Patents
Process for the preparation of a 4-chloro-benzenesulfonamide.Info
- Publication number
- CH248399A CH248399A CH248399DA CH248399A CH 248399 A CH248399 A CH 248399A CH 248399D A CH248399D A CH 248399DA CH 248399 A CH248399 A CH 248399A
- Authority
- CH
- Switzerland
- Prior art keywords
- chloro
- preparation
- ethyl
- benzenesulfonamide
- amide
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N41/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a sulfur atom bound to a hetero atom
- A01N41/02—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a sulfur atom bound to a hetero atom containing a sulfur-to-oxygen double bond
- A01N41/04—Sulfonic acids; Derivatives thereof
- A01N41/06—Sulfonic acid amides
Description
Verfahren zur Herstellung eines 4-Chlor-benzolsulfonamides. Gegenstand vorliegenden Patentes ist ein Verfahren zur Herstellung eines 4-Chlor-ben- zolsulfonamides. Das Verfahren ist dadurch gekennzeichnet, da.ss man ein 4-Chlor-benzol- sulfo#nsäurehalogenid mit einer Metallver bindung des N-Äthyl-acetamides umsetzt und das entstandene 4-Chlor-benzolsulfon- N-äthyl-N-acetyla-mid verseift.
Die entstan dene neue Verbindung, das 4-Chlor-benzol- sulfon-N-äthyl-amid, schmilzt bei 70-71 und siedet unter einem Druck von 0,1 mm bei 170 . Sie soll als Milbenbekämpfungs- mittel (zur Bekämpfung sowohl von frei- als auch von parasitisch lebenden Milben) Ver wendung finden. <I>Beispiel:</I> 18 Teile N-Äthyl-acetamid werden in 150 Volumteilen abs. Toluol mit 8 Teilen pulverisiertem Natriumamid etwa 1/2 Stunde zum Sieden erhitzt.
Nach dem Erkalten lässt man eine Lösung von 36 Teilen 4-Chlor- benzolsulfochlorid in 150 Volumteilen abs. Toluol zufliessen und kocht das Ganze unter Rühren 3 Stunden unter Rückfluss. Hierauf fügt man verdünnte Natronlauge hinzu und kocht unter gutem Rühren kurze Zeit, wo durch das entstandene 4-Chlor-benzolsulfon- N-äthyl-N-acetyl-amid rasch vollständig ver seift- wird.
Nach dem Erkalten wird die Toluolschicht abgetrennt, die wässrige Schicht filtriert und durch Ansäuern das 4-Chlor- benzolsulfon-N-äthyl-amid ausgefällt. Es wird durch Destillation im Hochvakuum oder Kristallisation aus Methanol gereinigt. Das Produkt schmilzt bei 70-71 und siedet unter einem Druck von 0,1 mm bei 170 .
Process for the preparation of a 4-chloro-benzenesulfonamide. The subject of the present patent is a process for the preparation of a 4-chloro-benzene sulfonamide. The process is characterized in that a 4-chloro-benzene sulfonic acid halide is reacted with a metal compound of the N-ethyl acetamide and the 4-chloro-benzenesulfone-N-ethyl-N-acetyla-amide is saponified .
The resulting new compound, 4-chloro-benzene-sulfone-N-ethyl-amide, melts at 70-71 and boils at 170 under a pressure of 0.1 mm. It should be used as a mite control agent (to control both free and parasitic mites). <I> Example: </I> 18 parts of N-ethyl acetamide in 150 parts by volume of abs. Heat toluene with 8 parts of powdered sodium amide to boiling for about 1/2 hour.
After cooling, a solution of 36 parts of 4-chlorobenzenesulfochloride in 150 parts by volume of abs. Flow in toluene and reflux the whole thing while stirring for 3 hours. Dilute sodium hydroxide solution is then added and the mixture is boiled for a short time with thorough stirring, at which point the 4-chloro-benzenesulfone-N-ethyl-N-acetyl-amide that has formed is quickly and completely soap.
After cooling, the toluene layer is separated off, the aqueous layer is filtered and the 4-chlorobenzenesulfon-N-ethyl-amide is precipitated by acidification. It is purified by distillation in a high vacuum or crystallization from methanol. The product melts at 70-71 and boils at 170 under a pressure of 0.1 mm.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH248399T | 1945-06-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH248399A true CH248399A (en) | 1947-05-15 |
Family
ID=4466877
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH248399D CH248399A (en) | 1945-06-28 | 1945-06-28 | Process for the preparation of a 4-chloro-benzenesulfonamide. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH248399A (en) |
-
1945
- 1945-06-28 CH CH248399D patent/CH248399A/en unknown
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