Acetonitrile → 3-(3-Chloro-5-fluorophenyl)-1-propylpyrrolidin-3-ol

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A mixture of 3-(3-chloro-5-fluorophenyl)pyrrolidin-3-ol (1.10 g, 5 mmol), acetonitrile (20 mL), potassium carbonate (1.4 g, 10.1 mmol) and iodopropane (1.13 mg, 6.65 mmol) was stirred at ambient temperature for 2 h. The temperature was shortly raised to 40° C. twice during this period. Water was added and the aqueous phase was extracted with ethyl acetate, the combined organic phase was dried (MgSO4), and evaporated. Purification by flash chromatography on silica gel (ethyl acetate/methanol, 1:0 to 1:1) gave the title compound (0.57 g). The amine was converted to the oxalic acid salt and recrystallized from ethanol/diisopropyl ether: M.p. 157.2° C.; MS m/z (relative intensity, 70 eV) 257 (M+, 8), 228 (bp), 198 (46), 129 (36), 84 (59).

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