Dimethyl Sulfoxide → HCID 14834673, Verbindung

HRID 2107598Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2107598
Cl[C:2]1[C:7]([N+:8]([O-:10])=[O:9])=[CH:6][C:5]([F:11])=[C:4]([F:12])[C:3]=1[CH3:13].[F-:14].[K+].CS(C)=O>C1C=CC=CC=1>[F:14][C:2]1[C:7]([N+:8]([O-:10])=[O:9])=[CH:6][C:5]([F:11])=[C:4]([F:12])[C:3]=1[CH3:13]

Komponenten

5

Edukt 3

HCID 679Dimethyl SulfoxideHCID 522689Potassium FluorideHCID 14834653HCID 14834653, Verbindung

Produkt 1

HCID 14834673HCID 14834673, VerbindungAusbeute 48,9 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 241BenzeneLösungsmittel

Versuchsvorschrift

To 2-chloro-5,6-difluoro-3-nitrotoluene (1.0 g) are added spray-dried potassium fluoride (1.4 g), anhydrous dimethylsulfoxide (10 ml) and benzene (10 ml), and the moisture is removed by azeotropic distillation together with benzene. Subsequently, the mixture is stirred at 170°-180° C. under argon stream for 3.5 hours. After cooling, the reaction mixture is poured into ice water and extracted with diethyl ether. The extract is washed with water, dried and then the solvent is distilled off. The residue is purified by silica gel column chromatography (solvent, n-hexane) to give 2,5,6-trifluoro-3-nitrotoluene (0.45 g).

Aufarbeitung

  1. customthe moisture is removed by azeotropic distillation together with benzene
  2. temperatureAfter cooling
  3. additionthe reaction mixture is poured into ice water
  4. extractionextracted with diethyl ether
  5. washThe extract is washed with water
  6. customdried
  7. distillationthe solvent is distilled off
  8. customThe residue is purified by silica gel column chromatography (solvent, n-hexane)

Quellen und Nachweise

ORD-Eintrag
ord-8c33f9173d4247d78de63ff27f6c0b46
Quelldatensatz
uspto-grants-1990_06
Patentnummer
US04935420

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