反应详情

温度

10 °C

To a solution of 0.720 g (0.018 mol) of 60% sodium hydride suspended in 50 mL DMF at 10° C. was added dropwise 4.0 g (0.0164 mol) of the product from step B dissolved in 25 mL DMF. The reaction mixture was stirred at 10° C. for 20 min. and 3.1 g (0.0164 mol) ethyl bromoacetate was added all at once. The reaction was heated at 60° C. for 15 min, cooled to room temperature, poured into 200 mL 10% HCl, extracted with ethyl acetate (3×50 mL), washed with brine (1×100 mL), dried over anhydrous magnesium sulfate, filtered and concentrated under vacuum to afford 4.0 g of a viscous oil. 1H NMR (CDCl3) δ: 1.10 (t, 3H), 3.18 (s, 2H), 3.63 (s, 2H), 4.18 (q, 2H), 6.95-7.30 (m, 6H), 7.80 (dd, 1H). IR (neat): 1720, 1676 cm-1 .

1. temperatureThe reaction was heated at 60° C. for 15 min
2. temperaturecooled to room temperature
3. extractionextracted with ethyl acetate (3×50 mL)
4. washwashed with brine (1×100 mL)
5. dry with materialdried over anhydrous magnesium sulfate
6. filtrationfiltered
7. concentrationconcentrated under vacuum