反应详情

To a solution of 2-(cyclopropylamino)-N-methyl-3-nitrobenzamide (1.76 g, 7.48 mmol) in MeOH (25 mL) was added palladium 10 wt % on carbon (180 mg, 75 mmol) under N2. After flushing the flask with N2 for 2 min, the solution was stirred under a H2 balloon for 3 h. LC-MS showed the reaction was complete. The reaction mixture was filtered and the filtrates collected, rinsed with MeOH and concentrated. The residue was purified by column chromatography on a silica gel column using EtOAc:DCM (1:1) as eluent to give 3-amino-2-(cyclopropylamino)-N-methylbenzamide: 1H NMR (400 MHz, CDCl3) δ 6.85-6.80 (m, 3H), 6.20 (br, 1H), 5.94 (br, 1H), 4.07 (br, 1H), 2.98 (d, J=4 Hz, 3H), 2.63-2.55 (m, 1H), 0.65-0.53 (m, 4H); LCMS (ESI) m/z 206.1 [M+H]+.

1. customAfter flushing the flask with N2 for 2 min
2. filtrationThe reaction mixture was filtered
3. customthe filtrates collected
4. washrinsed with MeOH
5. concentrationconcentrated
6. customThe residue was purified by column chromatography on a silica gel column