HCID 14834673, Verbindung → 2,4,5-Trifluoro-3-methylaniline

HRID 232645Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 232645
[F:1][C:2]1[C:7]([F:8])=[CH:6][C:5]([N+:9]([O-])=O)=[C:4]([F:12])[C:3]=1[CH3:13]>[Pd].C(O)(=O)C>[F:12][C:4]1[C:3]([CH3:13])=[C:2]([F:1])[C:7]([F:8])=[CH:6][C:5]=1[NH2:9]

Komponenten

4

Edukt 1

HCID 14834673HCID 14834673, Verbindung

Produkt 1

HCID 146512532,4,5-Trifluoro-3-methylanilineAusbeute 77,5 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 23938PalladiumKatalysatorHCID 176Acetic AcidLösungsmittel

Versuchsvorschrift

To acetic acid (350 ml) are added 5% Pd-C (3.5 g) and 2,3,6-trifluoro-5-nitrotoluene (35 g) and the mixture is subjected to catalytic reduction at room temperature under atomospheric pressure. 5% Pd-C is filtered off and the acetic acid is distilled off under reduced pressure. The residue is poured into ice-water, neutralized, extracted with dichloromethane, and the extract is washed with water and dried. The solvent is distilled off under reduced pressure and the obtained residue is distilled under reduced pressure to give 2,4,5-trifluoro-3-methylaniline (22.86 g), as yellow crystals, b.p. 85° C./20 mmHg.

Aufarbeitung

  1. customis subjected to catalytic reduction at room temperature under atomospheric pressure
  2. filtration5% Pd-C is filtered off
  3. distillationthe acetic acid is distilled off under reduced pressure
  4. additionThe residue is poured into ice-water
  5. extractionextracted with dichloromethane
  6. washthe extract is washed with water
  7. customdried
  8. distillationThe solvent is distilled off under reduced pressure
  9. distillationthe obtained residue is distilled under reduced pressure

Quellen und Nachweise

ORD-Eintrag
ord-664c5e0b6ed94c92a78b6c550119d3bf
Quelldatensatz
uspto-grants-1997_01
Patentnummer
US05591744

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