反应详情

To a well-stirred solution of 4′-hydroxy-4-methoxy-chalcone, 7 (15 g, 59 mmol) in dry dimethyl formamide (170 mL) was added 50% sodium hydride (5.6 g, 236 mmol) at 0-5° C. and after 30 minutes, excess of epichlorohydrin (13.8 mL, 177 mmol) was added and stirred at room temperature for overnight. The reaction mixture was concentrated under reduced pressure, diluted with water and extracted with chloroform. The combined organic layers were dried over sodium sulphate, filtered and evaporated to dryness. The crude product was purified by column chromatography to afford 13. Yield 11 g (60%); mp 85-87° C.; MS (FAB) 311 (M++1); IR (KBr) 1655; 1H NMR (200 MHz, CDCl3) δ 8.02 (d, J=8.8 Hz, 2H), 7.77 (d, J=15.6 Hz, 1H), 7.59 (d, J=8.7 Hz, 2H), 7.41 (d, J=15.6 Hz, 1H), 6.99 (d, J=8.8 Hz, 2H), 6.93 (d, J=8.7 Hz, 2H), 4.32 (dd, J=11.1 Hz, 2.9 Hz, 1H), 4.01 (dd, J=11.1 Hz, 5.7 Hz, 1H), 3.84 (s, 31H), 3.40-3.35 (m, 1H), 2.92 (t, J=4.5 Hz, 4.5 Hz, 1H), 2.77 (dd, J=4.8 Hz, 2.6 Hz, 1H).

1. concentrationThe reaction mixture was concentrated under reduced pressure
2. additiondiluted with water
3. extractionextracted with chloroform
4. dry with materialThe combined organic layers were dried over sodium sulphate
5. filtrationfiltered
6. customevaporated to dryness
7. customThe crude product was purified by column chromatography