Benzaldehyde → HCID 66704734, compound

Participants

Reaction Steps

(3S,4S)-3-Aminomethyl-1-benzyl-4-fluoropyrrolidine (186 mg) was dissolved in methanol (4 mL). To this solution, molecular sieves 4A (80.0 mg) and then benzaldehyde (90.8 μL) were added. The mixture was stirred at room temperature for 1 hour, followed by addition of a borane/pyridine complex (90.2 μL) and further stirring at room temperature for 3 hours. Subsequently, 6 mol/L hydrochloric acid (1.5 mL) was added and the mixture was stirred for 1 hour. A 6 mol/L aqueous solution of sodium hydroxide was then added to make the mixture basic. The mixture was extracted with diethyl ether (3×10 mL). The diethyl ether layers were combined, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography (eluant: hexane: ethyl acetate=4:1) to give (3S,4S)-1-benzyl-3-benzylaminomethyl-4-fluoropyrrolidine as a pale brown oil (179 mg).

Provenance & Evidence