Sulfuric Acid → 1-Bromo-3-(difluoromethyl)-5-nitrobenzene

HRID 1040030Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1040030
[F:1][CH:2]([F:12])[C:3]1[CH:8]=[CH:7][CH:6]=[C:5]([N+:9]([O-:11])=[O:10])[CH:4]=1.OS(O)(=O)=O.C1C(=O)N([Br:25])C(=O)C1>O>[Br:25][C:7]1[CH:6]=[C:5]([N+:9]([O-:11])=[O:10])[CH:4]=[C:3]([CH:2]([F:12])[F:1])[CH:8]=1

Komponenten

5

Edukt 3

HCID 1118Sulfuric AcidHCID 67184N-bromobutanimideHCID 214079051-(Difluoromethyl)-3-nitrobenzene

Produkt 1

HCID 672481711-Bromo-3-(difluoromethyl)-5-nitrobenzeneAusbeute 56,4 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 962WaterLösungsmittel

Versuchsvorschrift

1-(Difluoromethyl)-3-nitrobenzene (866 mg, 5.00 mmol) was added to cold conc. H2SO4 and then NBS (890 mg, 5.00 mmol) was added. The mixture was warmed to room temperature for 30 minutes then 50-60° C. for 1 h. The mixture was then poured in water and ice and extracted diethyl ether twice. The organic layer was washed with dilute aqueous NaHCO3 and brine. Purification by chromatography on silica gel (0-15% ethyl acetate in hexanes) yielded 1-bromo-3-(difluoromethyl)-5-nitrobenzene (710 Mg, 2.82 mmol, 56.3%).

Aufarbeitung

  1. extractionice and extracted diethyl ether twice
  2. washThe organic layer was washed with dilute aqueous NaHCO3 and brine
  3. customPurification by chromatography on silica gel (0-15% ethyl acetate in hexanes)

Quellen und Nachweise

ORD-Eintrag
ord-559843c426d1474e8f38a32f71f7d654
Quelldatensatz
uspto-grants-2013_10
Patentnummer
US08551984B2

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