Ammonia → 2,3-Difluoro-6-nitroaniline

HRID 1404828Notes

Reaction equation

HRID 1404828 reaction equation
[F:1][C:2]1[CH:7]=[CH:6][C:5]([N+:8]([O-:10])=[O:9])=[C:4](F)[C:3]=1[F:12].[NH3:13]>>[F:12][C:3]1[C:2]([F:1])=[CH:7][CH:6]=[C:5]([N+:8]([O-:10])=[O:9])[C:4]=1[NH2:13]

Participants

3

Reactant 2

HCID 222AmmoniaHCID 698711,2,3-Trifluoro-4-nitrobenzene

Product 1

HCID 27370282,3-Difluoro-6-nitroanilineYield 35.6%

Conditions

Temperature
70 °C

Procedure

A solution of 1,2,3-trifluoro-4-nitrobenzene (1) (1.00 g, 5.64 mmol, 1.00 equiv) in methanolic ammonia (1.5 mL) was taken in microwave vial and heated to 70° C. for 90 min in the microwave. The solvent was evaporated under vacuum to give crude; which was purified by silica gel column chromatography (EtOAc/Hexane 1:49) to furnish compound 2 (0.350 g, 35.6%) as yellow solid. TLC: 10% EtOAc/Hexane (Rf: 0.10); 1H NMR (500 MHz, DMSO-d6): δ 7.94-7.91 (m, 1H), 7.51 (s, 2H), 6.75-6.70 (m, 1H); LC-MS: m/z=173 (M+-1) at RT 3.15 (99.8% purity)

Workup

  1. customThe solvent was evaporated under vacuum
  2. customto give crude
  3. customwhich was purified by silica gel column chromatography (EtOAc/Hexane 1:49)

Sources & evidence

ORD record
ord-5d286daae1a142c9ad591fc7a211e18a
Source dataset
uspto-grants-2014_12
Patent number
US08916133B2

Reaction notes

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