反应详情

Benzyl bromide (0.19 mL, 1.60 mmol) was added to a solution of 3-(3,4-dichloro-benzoyl)-pyrrolidine-1-carboxylic acid tert-butyl ester (138 mg, 0.40 mmol) in THF (5 mL), and then lithium bis(trimethylsilyl)amide (1.0 M, in THF, 1.2 mL, 1.20 mmol) was slowly added at room temperature. The reaction mixture was stirred at room temperature for 1.5 hours, then was quenched by addition of saturated aqueous NH4Cl, diluted with water, and extracted with EtOAc. The combined organic extracts were dried over MgSO4, filtered and evaporated under reduced pressure. The residue was purified by flash chromatography (10% to 20% of EtOAc in hexane) to give 40 mg (23% yield) of 3-benzyl-3-(3,4-dichloro-benzoyl)-pyrrolidine-1-carboxylic acid tert-butyl ester as a colorless oil.

1. customwas quenched by addition of saturated aqueous NH4Cl
2. additiondiluted with water
3. extractionextracted with EtOAc
4. dry with materialThe combined organic extracts were dried over MgSO4
5. filtrationfiltered
6. customevaporated under reduced pressure
7. customThe residue was purified by flash chromatography (10% to 20% of EtOAc in hexane)