3-Nitro-4-(propylamino)benzonitrile → 3-Amino-4-(propylamino)benzonitrile

Participants

Reaction Steps

To a Parr bottle containing 4-n-propylamino-3-nitrobenzonitrile (7.63 g, 37.2 mmol) in ethyl acetate (38 mL) is added 5% Pd/C (50% wet, 633 mg). The Parr bottle is sealed in a mechanical shaker, evacuated, and then purged with nitrogen followed by hydrogen. The system is pressurized to 50 PSI of hydrogen at room temperature and mechanical shaking engaged. After 2 hours, shaking is stopped, and the system purged with nitrogen prior to opening the vessel. The reaction mixture is filtered through celite, concentrated in vacuo, and the obtained solid recrystallized by dissolving in ethyl acetate (15 mL), heating, and adding hexanes (15 mL), to give 3-Amino-4-n-propylaminobenzonitrile as gray crystals. 1H NMR (CDCl3) δ 7.14 (1H, dd), 6.92 (1H, d), 6.56 (1H, d), 3.98 (1H, br s), 3.30 (2H, br s), 3.12 (2H, t), 1.75-1.65 (2H, m), 1.03 (3H, t). LRMS calcd 175.23, found 176.2 (MH+).

Provenance & Evidence