反应详情

N-Bromosuccinimide (2.13 g, 12 mmol) and subsequently α,α′-azoisobutyronitrile (16 mg, 0.1 mmol) were added to a solution of 3,5-lutidine (1.14 ml, 10 mmol) in CCl4 (40 ml). The reaction mixture was stirred at reflux for 2 hrs. After cooling, succinimide was removed by filtration and the filtrate was evaporated to smaller volume (10 ml). To this filtrate, a mixture of 3-hydroxybenzenecarboxamide (550 mg, 4 mmol) and K2CO3 (830 mg, 6 mmol) in DMF (5 ml) was added and the new reaction mixture was stirred at 60° C. for 24 h. After diluting with CH2Cl2 (100 ml), the solution was washed with Na2CO3 solution (40 ml) and water (40 ml), dried (Na2SO4) and evaporated to dryness, under reduced pressure. The brown oil residue was extracted by trituration with Et2O (2×10 ml), and from the Et2O extracts, the precipitant solid was filtered and washed with pentane, to give 70 mg (7.2% yield) of the desired product. Mp 152-154° C., HPLC-MS: m/z 243 [M+H]+, Rt=2.28 min.

1. temperatureat reflux for 2 hrs
2. temperatureAfter cooling
3. customsuccinimide was removed by filtration
4. customthe filtrate was evaporated to smaller volume (10 ml)
5. additionwas added
6. stirringthe new reaction mixture was stirred at 60° C. for 24 h
7. washthe solution was washed with Na2CO3 solution (40 ml) and water (40 ml)
8. dry with materialdried (Na2SO4)
9. customevaporated to dryness, under reduced pressure
10. extractionThe brown oil residue was extracted by trituration with Et2O (2×10 ml)
11. filtrationthe precipitant solid was filtered
12. washwashed with pentane