Ethanol → (2,6-Dichlorophenylthio)Acetic Acid

HRID 485000Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 485000
[Cl:1][C:2]1[CH:7]=[CH:6][CH:5]=[C:4]([Cl:8])[C:3]=1[SH:9].C(O)C.C[O-].[Na+].Br[CH2:17][C:18]([OH:20])=[O:19]>CO>[Cl:1][C:2]1[CH:7]=[CH:6][CH:5]=[C:4]([Cl:8])[C:3]=1[S:9][CH2:17][C:18]([OH:20])=[O:19]

Komponenten

6

Edukt 4

HCID 702EthanolHCID 6227Bromoacetic AcidHCID 90671Benzenethiol, 2,6-dichloro-HCID 10942334Sodium Methoxide

Produkt 1

HCID 1810591(2,6-Dichlorophenylthio)Acetic Acid

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 887MethanolLösungsmittel

Versuchsvorschrift

2,6-dichlorothiophenol, 50.0 gm, was added to 250 ml of ethanol. 63.8 ml of a 25% solution of sodium methoxide (2 equivalents) in methanol was then added to the system. The system was stirred at room temperature for approximately 3 hours. Afterwards, 20 ml of bromoacetic acid was added and the system was then heated to reflux. The system was continued at reflux for 16 hours. The reaction was then stopped and the solvent removed by stripping. The resulting material was dissolved with a basic aqueous solution and then washed with methylene chloride. Concentrated HCl was next added to the aqueous solution to acidify it. The product was extracted with methylene chloride. The methylene chloride solution was stripped and then triturated with hexane. The product was then filtered, washed with water and air dried to yield 55.3 gm of the 2,6-dichlorothiophenoxyacetic acid.

Aufarbeitung

  1. temperaturethe system was then heated to reflux
  2. temperatureat reflux for 16 hours
  3. customthe solvent removed by stripping
  4. dissolutionThe resulting material was dissolved with a basic aqueous solution
  5. washwashed with methylene chloride
  6. additionConcentrated HCl was next added to the aqueous solution
  7. extractionThe product was extracted with methylene chloride
  8. customtriturated with hexane
  9. filtrationThe product was then filtered
  10. washwashed with water and air
  11. customdried

Quellen und Nachweise

ORD-Eintrag
ord-7f9d4cee449d45a38e3c63976e8c8b55
Quelldatensatz
uspto-grants-1985_08
Patentnummer
US04535087

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