Trifluoroacetic acid → 3-Fluoro-2-nitroaniline

HRID 1945606Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1945606
[F:1][C:2]1[C:3]([N+:28]([O-:30])=[O:29])=[C:4]([N:8]=P(C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[CH:5]=[CH:6][CH:7]=1.C(O)(C(F)(F)F)=O>O>[F:1][C:2]1[C:3]([N+:28]([O-:30])=[O:29])=[C:4]([NH2:8])[CH:5]=[CH:6][CH:7]=1

Komponenten

4

Edukt 2

HCID 6422Trifluoroacetic acidHCID 596055033-Fluoro-2-nitro-N-(triphenylphosphoranylidene)benzenamine

Produkt 1

HCID 27828343-Fluoro-2-nitroanilineAusbeute 100 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 962WaterLösungsmittel

Versuchsvorschrift

A 2-5 mL microwave vial equipped with a magnetic follower was charged with 3-fluoro-2-nitro-N-(triphenylphosphoranylidene)benzenamine (585 mg, 1.4 mmol), water (3 mL) and TFA (0.1 mL). The reaction mixture was irradiated at 160° C. for 15 min and then partitioned between water and EtOAc. The organic layer was separated and washed with an saturated aqueous solution of sodium bicarbonate and brine, dried over Na2SO4, filtered and concentrated. The residue was subjected to flash chromatography (Si—PCC, 0-100% Et2O in pentane) to give 3-Fluoro-2-nitrophenylamine as an orange solid (218 mg, 100%). 1H NMR (CDCl3, 400 MHz): δ 7.22 (ddd, J=8.2, 8.2, 5.5 Hz, 1 H); 6.57 (ddd, J=8.5, 1.4, 1.4 Hz, 1 H); 6.48 (ddd, J=11.3, 8.2, 1.4 Hz, 1 H.

Aufarbeitung

  1. customA 2-5 mL microwave vial equipped with a magnetic follower
  2. customThe reaction mixture was irradiated at 160° C. for 15 min
  3. custompartitioned between water and EtOAc
  4. customThe organic layer was separated
  5. washwashed with an saturated aqueous solution of sodium bicarbonate and brine
  6. dry with materialdried over Na2SO4
  7. filtrationfiltered
  8. concentrationconcentrated

Quellen und Nachweise

ORD-Eintrag
ord-86d5c4b81c6f475a91b5a82fb651cede
Quelldatensatz
uspto-grants-2013_03
Patentnummer
US08394796B2

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