反应详情

温度

60 °C

A solution of phenylethylamine hydrochloride (2.88 g, 0.018 mol) and 2-bromo-N-tert-butyloxycarbonylethylamine (4.1 g, 0.018 mmol) in DMF (50 mL), containing K2CO3 (5.0 g, 0.036 mol), was heated at 60° C. for 4 h. The solution was filtered, evaporated and the residue partitioned between CH2Cl2 (2×100 mL) and water (100 mL). The combined organic layers were dried (Na2SO4) and evaporated. The residue was chromatographed on silica gel, eluting with CH2Cl2 :MeOH (90:10), to afford the title compound (1.44 g, 30%) as a colourless oil. 1H NMR (250 MHz, CDCl3) δ 1.44 (9H, s), 2.74 (2H, t, J=6.0Hz), 2.79 (2H, m), 2.88 (2H, m), 3.19 (2H, m), 4.87 (1H, br s), 7.19-7.22 (3H, m), 7.26-7.31 (2H, m). MS (ES+) (265, M+1).

1. filtrationThe solution was filtered
2. customevaporated
3. customthe residue partitioned between CH2Cl2 (2×100 mL) and water (100 mL)
4. dry with materialThe combined organic layers were dried (Na2SO4)
5. customevaporated
6. customThe residue was chromatographed on silica gel
7. washeluting with CH2Cl2 :MeOH (90:10)