反应详情

Preparation according to Example 51: Enantiomer E1 of 3-(2,3-difluorophenyl)-pyrrolidin-3-ol (0.15 g, 0.75 mmol), acetonitrile (6 mL), potassium carbonate (0.208 g, 1.5 mmol) and 1-bromo-2-methoxyethane (0.07 mL, 0.75 mmol). Flash chromate-graphy on silica gel (Ethyl acetate/methanol, 10:1). Yield: 0.07 g. [α]D=+22.5°; The amine was converted to the oxalic acid salt and recrystallized from ethanol/diethyl ether/diisopropyl ether; M.p. 149-150° C.; MS m/z (relative intensity, 70 eV) 257 (M+, 1), 212 (bp), 182 (65), 127 (22), 141 (16), 213 (12).

1. customPreparation
2. customrecrystallized from ethanol/diethyl ether/diisopropyl ether