反应详情

To a stirred solution of furfurylamine (0.171 g, 1.8 mmol) in pyridine (2 mL) at 0° C. was slowly added tetrahydrofuran-3-sulfonyl chloride (0.250 g, 1.5 mmol). The reaction mixture was warmed to room temperature and stirred for 16 hrs. The mixture was concentrated and the residue was dissolved in ethyl acetate. The organic layer was washed with 1N aqueous hydrochloric acid, saturated aqueous sodium bicarbonate, saturated aqueous sodium chloride, dried (anhydrous sodium sulfate), filtered, and concentrated in vacuo. The residue was purified by silica gel chromatography (0-50% ethyl acetate/hexanes) to afford the product (0.220 g, 65%) as a thick oil. 1H NMR (300 MHz, CDCl3) δ 7.41 (s, 1H), 6.36 (dd, 1H, J=3.3, 2.1 Hz), 6.31 (d, 1H, J=3.3 Hz), 4.68 (t, 1H, J=5.4 Hz), 4.36 (d, 2H, J=6.0 Hz), 4.05 (dd, 1H, J=10.2, 5.7 Hz), 4.02-3.78 (m, 3H), 3.65 (m, 1H), 2.36-2.10 (m, 2H).

1. customat 0° C.
2. concentrationThe mixture was concentrated
3. dissolutionthe residue was dissolved in ethyl acetate
4. washThe organic layer was washed with 1N aqueous hydrochloric acid, saturated aqueous sodium bicarbonate, saturated aqueous sodium chloride
5. dry with materialdried (anhydrous sodium sulfate)
6. filtrationfiltered
7. concentrationconcentrated in vacuo
8. customThe residue was purified by silica gel chromatography (0-50% ethyl acetate/hexanes)