反应详情

温度

80 °C

To a round bottom flask containing 1-(5-bromo-2-nitro-phenyl)-4-methyl-piperidine (as prepared above, 400 mg, 1.33 mmol) in 8 mL of dioxane was added propargyl alcohol (155 μL, 2.64 mmol), bis-dichloro(triphenylphosphinyl) palladium (II) (56.3 mg, 0.0798 mmol), copper (I) iodide (5.0 mg, 0.02 mmol) and triethylamine (741 μL, 5.32 mmol). The result was heated at 80° C. for 16 h. The reaction was then diluted with EtOAc (50 mL), washed with water (2×50 mL), dried (Na2SO4), and concentrated in vacuo. Purification of the crude material by preparative thin layer chromatography (75% EtOAc-hexanes) afforded 280 mg (77%) of the title compound as a reddish oil. 1H-NMR (CDCl3; 400 MHz): δ 7.73 (d, 1H, J=8.6 Hz), 7.17 (d, 1H, J=1.6 Hz), 6.98 (dd, 1H, J=8.6, 1.6 Hz), 3.23-3.26 (m, 2H), 4.53 (s, 2H), 1.73-1.42 (m, 5H), 2.86-2.79 (m, 2H), 1.00 (d, 3H, J=6.4 Hz).

1. washwashed with water (2×50 mL)
2. dry with materialdried (Na2SO4)
3. concentrationconcentrated in vacuo
4. customPurification of the crude material by preparative thin layer chromatography (75% EtOAc-hexanes)