反应详情

温度

60 °C

6-Methoxy-1-methyl-7-nitro-1,3,4,5-tetrahydro-benzo[b]azepin-2-one (530 mg, 2.12 mmol) in a 4:1 mixture of ethanol (17 mL) and hydrazine hydrate (4.5 mL) was heated to 60° C. and to it was added a ¼ mass equivalent of 10% Palladium/Carbon (50% H2O) (135 mg). The reaction was monitored by LC/MS to ensure that complete reduction occurred, and upon completion was cooled to room temperature. The Pd/C was filtered through celite, and the resulting filtrate concentrated to a minimal volume. This was then brought up in ˜120 mL of CH2Cl2 and washed with ˜25 mL of brine to remove excess hydrazine. The organic layer was then dried with MgSO4 and concentrated to give 7-Amino-6-methoxy-1-methyl-1,3,4,5-tetrahydro-benzo[b]azepin-2-one as a yellow gummy solid (432 mg, 93%). 1H-NMR (CDCl3) δ 6.78 (d, J=8.6 Hz, 1H), 6.65 (d, J=8.6 Hz, 1H), 3.81 (br s, 2H), 3.75 (s, 3H), 3.28 (s, 3H), 2.35-2.75 (br pk, 2H), 2.30 (t, J=6.9 Hz, 2H), 2.15 (m, 2H); LC/MS (ESI-pos) m/z 221.13 (M+H).

1. temperatureupon completion was cooled to room temperature
2. filtrationThe Pd/C was filtered through celite
3. concentrationthe resulting filtrate concentrated to a minimal volume
4. washwashed with ˜25 mL of brine
5. customto remove excess hydrazine
6. dry with materialThe organic layer was then dried with MgSO4
7. concentrationconcentrated