2-Bromo-1-ethyl-4-nitrobenzene → 3-Bromo-4-ethylaniline

HRID 83760Notes

Reaction equation

HRID 83760 reaction equation
[Br:1][C:2]1[CH:7]=[C:6]([N+:8]([O-])=O)[CH:5]=[CH:4][C:3]=1[CH2:11][CH3:12]>CO.[Ni]>[Br:1][C:2]1[CH:7]=[C:6]([CH:5]=[CH:4][C:3]=1[CH2:11][CH3:12])[NH2:8]

Participants

4

Reactant 1

HCID 223455942-Bromo-1-ethyl-4-nitrobenzene

Product 1

HCID 223456173-Bromo-4-ethylanilineYield 210.4%

Reagents, catalysts & solvents 2

HCID 935NickelCatalystHCID 887MethanolSolvent

Procedure

To a solution of 2-bromo-1-ethyl-4-nitro-benzene (25 g, 0.019 mol) in MeOH (100 mL) was added Raney-Ni (2.5 g). The reaction mixture was hydrogenated under hydrogen (1 atm) at room temperature. After stirring for 3 hours, the mixture was filtered and concentrated under reduced pressure. The crude material was purified by preparative HPLC to give 3-bromo-4-ethylaniline (8.0 g, 48%). 1H NMR (400 MHz, CDCl3) δ 6.92 (d, J=8.4 Hz, 1H), 6.83 (d, J=2.4 Hz, 1H), 6.52 (dd, J=2.4, 8.4 Hz, 1H), 2.57 (q, J=7.6 Hz, 2H), 1.10 (t, J=7.6 Hz, 3H). MS (ESI) m/e (M+H+) 200.

Workup

  1. customwas hydrogenated under hydrogen (1 atm) at room temperature
  2. filtrationthe mixture was filtered
  3. concentrationconcentrated under reduced pressure
  4. customThe crude material was purified by preparative HPLC

Sources & evidence

ORD record
ord-2bb7d8f1b5794cb29583ee71caa3eaba
Source dataset
uspto-grants-2014_09
Patent number
US08846753B2

Reaction notes

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