5-Benzyloxy-2-fluoro-4-methylnitrobenzene → 5-Benzyloxy-2-fluoro-4-methylaniline

HRID 7496

Reaction equation

[CH2:1]([O:8][C:9]1[C:10]([CH3:19])=[CH:11][C:12]([F:18])=[C:13]([N+:15]([O-])=O)[CH:14]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1>C(O)(=O)C.O.[Fe]>[CH2:1]([O:8][C:9]1[C:10]([CH3:19])=[CH:11][C:12]([F:18])=[C:13]([CH:14]=1)[NH2:15])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

Conditions

Temperature: 100 °C

Procedure

The starting material, 5-benzyloxy-2-fluoro-4-methylaniline, was obtained by adding iron powder (2.88 g, 51 mmol), in portions, to a solution of 5-benzyloxy-2-fluoro-4-methylnitrobenzene (4.8 g, 18 mmol) in acetic acid (33 ml) and water (5.7 ml), at ambient temperature. The mixture was heated and after stirring at 100° C. for 10 minutes, it was cooled and partitioned between ethyl acetate and water. The organic layer was washed with water, aqueous saturated sodium carbonate solution and then brine, dried (MgSO4) and the solvent evaporated. The residue was purified by flash chromatography using petroleum ether/ethyl acetate (8/2) as eluent to give 5-benzyloxy-2-fluoro-4-methylaniline (3.65 g, 87%).

Workup

customat ambient temperature
temperatureThe mixture was heated
temperatureit was cooled
custompartitioned between ethyl acetate and water
washThe organic layer was washed with water, aqueous saturated sodium carbonate solution
dry with materialbrine, dried (MgSO4)
customthe solvent evaporated
customThe residue was purified by flash chromatography

Sources & evidence

ORD record: ord-c8db631387344b1d934a549994ef9606
Source dataset: uspto-grants-2006_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07087602B2

Linked notes

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