Triethylamine → 2-Dimethylamino-1-(7-methoxy-8-nitro-1,2,4,5-tetrahydro-benzo[d]azepin-3-yl)-ethanone

Participants

Reaction Steps

Into a 1-neck round-bottom flask was added 7-methoxy-8-nitro-2,3,4,5-tetrahydro-1H-benzo[d]azepine (0.490 g, 2.20 mmol), dimethylamino-acetyl chloride hydrochloride (0.4181 g, 2.646 mmol), and Triethylamine (0.7683 mL, 5.512 mmol) in dichloromethane (11 mL) and the reaction was stirred overnight at room temperature. The reaction mixture was next partitioned between water and ethyl acetate, and the layers separated. The aqueous phase was extracted twice with EtOAc and the combined organic extract was washed with water, dried (MgSO4), filtered, and concentrated, and the product, 2-dimethylamino-1-(7-methoxy-8-nitro-1,2,4,5-tetrahydro-benzo[d]azepin-3-yl)-ethanone, was isolated by flash chromatography (SiO2, MeOH/dichloromethane 0-10%) as an oil (600 mg, 90%). LC/MS (ESI+): 308.04 (M+H).

Provenance & Evidence