1-Bromo-3-chloropropane → (2R)-1-(3-chloropropyl)-2-methylpyrrolidine

Participants

Reaction Conditions

Reaction Steps

To a solution of (R)-2-methylpyrrolidine (18.0 g) and 1-bromo-3-chloropropane (100.0 g) in acetone (360 mL), 5M aqueous sodium hydroxide (50 mL) was added dropwise in an ice bath and stirred at 80° C. for 4 hours. The reaction mixture was cooled to room temperature and extracted with diethyl ether. The organic layer was washed with brine, dried over anhydrous sodium sulfate and concentrated under reduced pressure, and the resulting residue was purified by NH-type silica gel column chromatography (eluting solvent: n-hexane/ethyl acetate=4/1 to 1/1) and silica gel column chromatography (eluting solvent: chloroform/methanol=9/1) to give the titled compound (17.8 g, 52%) as a yellow oil.

Provenance & Evidence