反应详情

温度

80 °C

To a solution of (4-{4-[(1-isopropylpiperidin-4-yl)oxy]phenyl}tetrahydro-2H-pyran-4-yl)methylamine (100 mg, 0.301 mmol) in toluene (2 ml) was added ethyl-4-bromobutyrate (43 μl, 0.301 mmol), N,N-diisopropylethylamine (157 μl, 0.904 mmol) and potassium iodide (5 mg, 0.030 mmol). Reaction mixture heated at 80° C. for 48 hours, then increased to reflux. Potassium carbonate (83 mg, 0.602 mmol) was added and reaction left at reflux for a further 24 hours until reaction complete. Reaction mixture was partitioned between ethyl acetate (20 ml) and saturated NaHCO3 (10 ml). Organic washings were dried over Na2SO4 and concentrated in vacuo to give a brown oil (101 mg crude, 84%). The compound was purified by column chromatography on silica gel, eluting with dichloromethane:methanol:ammonia, 100:0:0 to 98:2:0.2, to give the title compound as an oil (7 mg, 6%). 1H NMR (400 MHz, CDCl3) δ 7.20 (d, 2H), 7.90 (d, 2H), 4.22-4.36 (m, 1H), 4.80-4.90 (m, 2H), 3.52-3.67 (m, 2H), 3.40 (s, 2H), 2.72-3.88 (several multiplets, 3H), 2.50 (t, 2H), 2.34-2.44 (m, 2H), 2.21-2.30 (t, 2H), 1.60-2.10 (several multiplets, 10H), 1.08 (d, 6H).

1. customReaction mixture
2. temperatureincreased
3. temperatureto reflux
4. customreaction
5. waitleft
6. temperatureat reflux for a further 24 hours until reaction complete
7. customReaction mixture
8. customwas partitioned between ethyl acetate (20 ml) and saturated NaHCO3 (10 ml)
9. dry with materialOrganic washings were dried over Na2SO4
10. concentrationconcentrated in vacuo
11. customto give a brown oil (101 mg crude, 84%)
12. customThe compound was purified by column chromatography on silica gel
13. washeluting with dichloromethane