反应详情

Add sodium bicarbonate (0.0481 g, 0.573 mmol) to a stirred solution of 4-(chloromethyl)-3,5-dimethylisoxazole (0.054 mL, 0.435 mmol), and 6-[4-(2-amino-ethyl)-phenoxy]-nicotinamide (0.1004 g, 0.390 mmol), in dimethylformamide (4 mL). Heat the reaction to reflux under nitrogen for 4 h. Cool to room temperature, pour the reaction mixture into 1 N sodium hydroxide (50 mL), extract with diethyl ether (3×50 mL), dry the extracts over magnesium sulfate, filter, and concentrate on a rotary evaporator to give the crude product. The crude product is purified by flash chromatography on silica gel eluting with 0.8% concentrated ammonium hydroxide/8% ethanol/chloroform to yield 0.0843 g (59%) of 6-(4-{2-[(3,5-dimethyl-isoxazol-4-ylmethyl)-amino]-ethyl}-phenoxy)-nicotinamide: mass spectrum (ion spray): m/z=367.1 (M+1); 1H NMR (CDCl3): 8.57 (dd, 1H), 8.16 (dd, 1H), 7.26-7.22 (m, 4H), 7.09-7.05 (m, 2H), 6.96 (d, 1H), 3.54 (s, 2H), 2.88-2.79 (m, 4H), 2.33 (s, 3H), 2.20 (s, 3H), 1.50 (br s, 1H).

1. temperatureHeat
2. customthe reaction
3. temperatureto reflux under nitrogen for 4 h
4. extractionextract with diethyl ether (3×50 mL)
5. dry with materialdry the extracts over magnesium sulfate
6. filtrationfilter
7. concentrationconcentrate on a rotary evaporator
8. customto give the crude product
9. customThe crude product is purified by flash chromatography on silica gel eluting with 0.8% concentrated ammonium hydroxide/8% ethanol/chloroform