反应详情

温度

-78 °C

Combine 1-(3,4,5-trimethoxybenzyl)-2-oxopyrrolidine (0.98 g, 3.70 mmol) and tetrahydrofuran (10 mL). Cool to −78° C. using a dry-ice/acetone bath. Add a solution of sec-butyl lithium (2.99 mL, 1.3 M in hexane, 3.88 mmol). After 30 minutes, add 4-fluorobenzyl bromide (0.70 g, 3.70 mmol). After the addition is complete, warm to ambient temperature. After 2 hours, add water and extract three times with ethyl acetate. Dry the combined organic layers over Na2SO4, filter, and concentrate in vacuo to obtain a residue. Chromatograph the residue on silica gel eluting with ethyl acetate/hexane 1/1 to give the title compound.

1. additionAfter the addition
2. temperaturewarm to ambient temperature
3. waitAfter 2 hours
4. extractionextract three times with ethyl acetate
5. dry with materialDry the combined organic layers over Na2SO4
6. filtrationfilter
7. concentrationconcentrate in vacuo
8. customto obtain a residue