反应详情

A solution of [2-(2-chloro-6-nitro-phenyl)-ethyl]-methylamine (11.0 g, 0.051 mole) and ethyl bromoacetate (8.56 g, 0.051 mole) in acetonitrile (200 mL) containing potassium carbonate (3.54 g, 0.026 mole) was stirred at room temperature overnight. The mixture was evaporated in vacuo, water was added to the residue, this mixture was made basic with sodium carbonate and then extracted with dichloromethane (2×300 mL), the combined organic layers were washed with saturated sodium chloride (300 mL), dried and concentrated. Purification by flash column chromatography (silica gel, methylene chloride:hexanes 1:1) provided 9.0 g of the title compound as a light brown oil. 1H NMR (CDCl3): 7.70 δ (d, 1H); 7.60 δ (d, 1H); 7.35 δ (t, 1H); 4.20 δ (m, 2H); 3.35 δ (s, 2H); 3.15 δ (t, 2H); 2.90 δ (t, 2H); 2.50 δ (s, 3H); 1.30 δ (t, 3H).

1. customThe mixture was evaporated in vacuo, water
2. additionwas added to the residue
3. extractionextracted with dichloromethane (2×300 mL)
4. washthe combined organic layers were washed with saturated sodium chloride (300 mL)
5. customdried
6. concentrationconcentrated
7. customPurification by flash column chromatography (silica gel, methylene chloride:hexanes 1:1)