反应详情

To a solution of the (3S,4R)-tert-butyl 3-(4-bromo-2-nitrophenylamino)-4-(2-chloroacetoxy)pyrrolidine-1-carboxylate (2.20 mmol, 1.0 g) in methanol add 2.0 M aqueous lithium hydroxide (5 mL) and stir at room temperature for 3.5 h. Remove the solvent, dilute the residue with ethyl acetate (50 mL), and wash with water and brine. Dry over anhydrous sodium sulfate, filter, and evaporate the solvent. Purify by column chromatography eluting with 50% ethyl acetate in methylene chloride to obtain the title compound as a yellow solid (900 mg, 98%). APCI MS m/z 462 [M+H]+.

1. customRemove the solvent
2. additiondilute the residue with ethyl acetate (50 mL)
3. washwash with water and brine
4. dry with materialDry over anhydrous sodium sulfate
5. filtrationfilter
6. customevaporate the solvent
7. customPurify by column chromatography
8. washeluting with 50% ethyl acetate in methylene chloride