反应详情

A suspension of 2-tert-butyl-6-fluoro-5-nitro-1H-indole (1.5 g, 6.36 mmol) and Ni (0.5 g) in MeOH (20 mL) was stirred under H2 atmosphere (1 atm) at the room temperature for 3 h. The catalyst was filtered off and the filtrate was concentrated under reduced pressure to dryness. The residue was recrystallized in ether to give 2-tert-butyl-6-fluoro-1H-indol-5-amine (520 mg, 38%). 1H-NMR (300 MHz, DMSO-d6) δ 10.46 (brs, 1H), 6.90 (d, J=8.7 Hz, 1H), 6.75 (d, J=9.0 Hz, 1H), 5.86 (s, 1H), 4.37 (brs, 2H), 1.29 (s, 9H); MS (ESI) m/e 206.6.

1. filtrationThe catalyst was filtered off
2. concentrationthe filtrate was concentrated under reduced pressure to dryness
3. customThe residue was recrystallized in ether