反应详情

Add potassium carbonate (2.2821 g, 16.51 mmol) to a stirred solution of 3-(4-hydroxyphenyl)-1-propanol (1.0041 g, 6.598 mmol), 6-chloronicotinamide (1.0038 g, 6.411 mmol), dimethylacetamide (21 mL), and isooctane (3 mL). Equip the reaction setup with a Dean-Stark trap and heat the reaction to reflux under nitrogen for 6 h. Cool the reaction to room temperature and filter off the solids. Concentrate on a rotary evaporator to give the crude product. Take the crude product up in 1 N sodium hydroxide (250 mL), extract with ethyl acetate (4×100 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 1.5% concentrated ammonium hydroxide/15% ethanol/chloroform to yield 1.5188 g (87%) of 6-[4-(3-hydroxy-propyl)-phenoxy]-nicotinamide: mass spectrum (ion spray): m/z=273.2 (M+1); 1H NMR (DMSO-d6): 8.61 (d, 1H), 8.24 (dd, 1H), 8.03 (s, 1H), 7.48 (s, 1H), 7.25 (d, 2H), 7.07-7.03 (m, 3H), 4.50 (t, 1H), 3.46-3.41 (m, 2H), 2.63 (t, 2H), 1.77-1.70 (m, 2H).

1. customEquip the reaction setup with a Dean-Stark trap
2. temperatureheat
3. customthe reaction
4. temperatureto reflux under nitrogen for 6 h
5. temperatureCool
6. customthe reaction to room temperature
7. filtrationfilter off the solids
8. concentrationConcentrate on a rotary evaporator
9. customto give the crude product
10. extractionextract with ethyl acetate (4×100 mL)
11. dry with materialdry the extracts over magnesium sulfate
12. filtrationfilter
13. concentrationconcentrate on a rotary evaporator
14. customto give the crude product
15. customThe crude product is purified by flash chromatography on silica gel eluting with 1.5% concentrated ammonium hydroxide/15% ethanol/chloroform