反应详情

A mixture of 6 (612 mg, 1.5 mmol), 2-(aminomethyl)pyridine (1.08 g, 10 mmol), and Na2CO3 (excess) in CH3CN (30 mL) was stirred overnight at room temperature. Insoluble material was removed by filtration and the filtrate was concentrated in vacuo. Water (20 mL) was added to the residue, which was extracted with ethyl acetate (20 mL) three times. The combined organic layer was washed with brine and water, dried over MgSO4, and evaporated. The resulting oily material was purified by silica gel column chromatography (CHCl3-ethyl acetate) to afford 7 as pale yellow oil (112 mg, 17%): 1H-NMR (500 MHz, CDCl3) δ3.56 (s, 3H), 3.95 (s, 3H), 3.97 (s, 3H), 4.02 (s, 2H), 4.30 (s, 2H), 5.27 (s, 2H), 6.85 (s, 1H), 7.15 (dd, 1H, J=7.5, 5.0 Hz), 7.28 (t, 1H, J=7.5 Hz), 7.33 (d, 1H, J=7.5 Hz), 7.42 (d, 1H, J=7.5 Hz), 7.47 (d, 1H, J=7.5 Hz), 7.64 (m, 2H), 8.55 (d, 1H, J=5.0 Hz).

1. customInsoluble material was removed by filtration
2. concentrationthe filtrate was concentrated in vacuo
3. additionWater (20 mL) was added to the residue, which
4. extractionwas extracted with ethyl acetate (20 mL) three times
5. washThe combined organic layer was washed with brine and water
6. dry with materialdried over MgSO4
7. customevaporated
8. customThe resulting oily material was purified by silica gel column chromatography (CHCl3-ethyl acetate)