Potassium Carbonate → (+)-3-(3,4-Difluorophenyl)-1-propylpyrrolidin-3-OL

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Reaction Steps

Preparation according to Example 24: Enantiomer E1 of 3-(3,4-difluorophenyl)-pyrrolidin-3-ol (0.26 g, 1.3 mmol), acetonitrile (3 mL), potassium carbonate (0.269 g, 1.95 mmol) and iodopropane (0.22 g, 1.3 mmol). Purification by HPLC on Waters OBD C18, 5 μm (MeOH/33 mM NH3, 45:55 to 60:40). Yield: 0.156 g. [α]D=+19.0° (methanol). The amine was converted to the fumaric acid salt and recrystallized from methanol/diethyl ether/diisopropyl ether: M.p. 127-129° C.; MS m/z (relative intensity, 70 eV) 241 (M+, 9), 212, (bp), 182 (32), 141 (17), 84 (58).

Provenance & Evidence