反应详情

温度

60 °C

7-Nitro-1,3,4,5-tetrahydro-benzo[b]azepin-2-one (375 mg, 1.82 mmol) and methyl bromoacetate (417 mg, 2.73 mmol) were dissolved in anhydrous DMF. Sodium hydride (60% in mineral oil, 146 mg, 3.64 mmol) was added, and the mixture was heated to 60° C. for 2 hours. After cooling to room temperature, the mixture was partitioned between ethyl acetate and water, washed once with water, and concentrated to a brown oil. Preparative TLC (50% EtOAc/hexane) afforded (7-Nitro-2-oxo-2,3,4,5-tetrahydro-benzo[b]azepin-1-yl)-acetic acid methyl ester as a yellow solid, 454 mg. (90% yield) 1H NMR (400 MHz, DMSO-d6) δ 8.23 (s, 1H), 8.12-8.18 (m, 1H), 7.51-7.56 (m, 1H), 4.60 (s, 2H), 3.62 (s, 3H), 2.93-3.00 (m, 2H), 2.05-2.20 (m, 4H); MS (m/e) 279 (M+1).

1. temperatureAfter cooling to room temperature
2. customthe mixture was partitioned between ethyl acetate and water
3. washwashed once with water
4. concentrationconcentrated to a brown oil