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

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To a solution of (R)-2-methylpyrrolidine (18.0 g) and 1-bromo-3-chloropropane (100.0 g) in acetone (360 mL), aqueous sodium hydroxide (5 M, 50 mL) was added dropwise in an ice bath and the mixture was heated to 80° C., at which it was stirred for 4 hours. The reaction mixture was extracted with diethyl ether, and the organic layer was washed with brine, dried over anhydrous sodium sulfate and concentrated under reduced pressure. 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.

Herkunft & Nachweise