反应详情

A mixture of methyl bromovalerate (1.56 g, 8.0 mmol), 4-benzylpiperidine (1.49 g, 8.5 mmol) and potassium carbonate (2.93 g, 21.25 mmol) in 30 mL of acetonitrile was refluxed under N2 for 12 hr. The inorganic salt was removed through a short column of silica gel and washed with ethyl acetate (3×30 mL). The filtrate was evaporated in vacuo to give a residue, which was purified by flash chromatography, giving 1.8 g (78%) of the product as a pale yellow oil. 1H NMR (CHCl3), 1.312 (m, 2 H), 1.505-1.593 (m, 7 H), 1.831 (m, 2 H), 2.292 (m, 4 H), 2.505 (d, J=6.9 Hz, 2 H), 2.860 (d, J=11.4 Hz, 2 H), 3.647 (s, 3 H), 7.136 (m, 5 H).

1. temperaturewas refluxed under N2 for 12 hr
2. customThe inorganic salt was removed through a short column of silica gel
3. washwashed with ethyl acetate (3×30 mL)
4. customThe filtrate was evaporated in vacuo
5. customto give a residue, which
6. customwas purified by flash chromatography