2,4-Difluoronitrobenzene → N-Cyclopropyl-5-fluoro-2-nitroaniline

Participants

Reaction Steps

To a solution of 2,4-difluoro-1-nitrobenzene (0.7 mL, 6.3 mmol) in anhydrous CH3CN (10 mL) were added cyclopropylamine (0.4 mL, 6.3 mmol) and DIPEA (1.1 mL, 6.3 mmol). The reaction mixture was stirred at RT for 18 h then evaporated in vacuo. The resulting residue was purified by column chromatography (Si—PCC, gradient 0-10% EtOAc in cyclohexane) to afford the title compound as a yellow solid (6.3 mmol, quantitative). 1H NMR (CDCl3, 300 MHz): δ 8.26-8.09 (2H, m), 6.95 (1H, dd, J=11.43, 2.68 Hz), 6.46-6.35 (1H, m), 2.60-2.50 (1H, m), 0.98-0.89 (2H, m), 0.71-0.63 (2H, m).

Provenance & Evidence