Water → HCID 25145782, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 3-(3,5-difluorophenyl)-3-fluoropyrrolidine (0.17 g, 0.85 mmol) in formic acid (2.45 mL) and aqueous formaldehyde (40%, 2.2 mL) was heated at 85° C. for 1 h. Water (100 mL) and diethyl ether was added, the phases were separated and the aqueous phase was basified by the addition of aqueous sodium hydroxide (5M, 20 mL). The aqueous phase was extracted with ethyl acetate (2×50 mL), 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 (0.12 g). The amine was converted to the oxalic acid salt and recrystallized from methanol/diethyl ether/diisopropyl ether: M.p. 128-129° C.; MS m/z (relative intensity, 70 eV) 215 (M+, bp), 194 (29), 193 (36), 151 (33), 57 (92).

Provenance & Evidence