反应详情

A mixture of 3-trifluoromethanesulfonyloxymethyl-pyrrolidine-1-carboxylic acid tert-butyl ester (3.85 g, 13.8 mmol) and LiBr (3.61 g, 42 mmol) in dry acetone (30 mL) was refluxed overnight. The reaction mixture was allowed to cool to room temperature, filtered and concentrated. The residue was dissolved in CH2Cl2 and washed with water, dried and concentrated under reduced pressure to give 6 g of the crude product. Purification by flash chromatography (Heptane/EtOAc: 1/0→68/32) afforded of 3-bromomethyl-pyrrolidine-1-carboxylic acid tert-butyl ester (2.84 g, 78%) as a colourless oil.

1. temperaturewas refluxed overnight
2. filtrationfiltered
3. concentrationconcentrated
4. dissolutionThe residue was dissolved in CH2Cl2
5. washwashed with water
6. customdried
7. concentrationconcentrated under reduced pressure
8. customto give 6 g of the crude product
9. customPurification by flash chromatography (Heptane/EtOAc: 1/0→68/32)