反应详情

温度

120 °C

To a stirring solution of 1-bromo-4-(heptyloxy)benzene (447 mg, 1.65 mmol) in dioxane (5 mL) were added tert-butyl 3-oxopiperazine-1-carboxylate (330 mg, 1.65 mmol), copper I iodide (31.4 mg, 0.17 mmol), (1R,2R)—N1,N2-dimethylcyclohexane-1,2-diamine (234 mg, 1.65 mmol) and potassium carbonate (456 mg, 3.30 mmol). The reaction mixture was heated at 120° C. for 16 h. The reaction mixture was passed through a plug of celite, eluted with EA (50 mL). The organics were washed with ammonium chloride (25 mL), water (25 mL) and brine (25 mL) then dried over MgSO4 and concentrated to afford 602 mg (89%) of tert-butyl 4-(4-(heptyloxy)phenyl)-3-oxopiperazine-1-carboxylate. LCMS-ESI (m/z) calculated for C22H34N2O4: 390.5. found 319.0 [M+H]+, tR=2.90 min. (Method 4).

1. washeluted with EA (50 mL)
2. washThe organics were washed with ammonium chloride (25 mL), water (25 mL) and brine (25 mL)
3. dry with materialthen dried over MgSO4
4. concentrationconcentrated