Trifluoroacetic acid → HCID 68288631, compound

Participants

Reaction Steps

To a solution of tert-butyl 4-(4-cyanophenyl)-2-methylpiperidine-1-carboxylate (compound 176.2, 500 mg, 1.50 mmol, 1.00 equiv, 90%) in dichloromethane (3 mL) was added TFA dropwise (1 mL). The resulting mixture was stirred for 1.5 h at room temperature, then diluted with 30 mL of dichloromethane. The resulting mixture was washed with sodium bicarbonate (aq., 1 M. Note: significant gas evolution). The aqueous phase was extracted with 2×50 mL of dichloromethane and the combined organic layers were dried (Na2SO4), and concentrated in vacuo. The residue was purified using silica gel column chromatography with methanol/dichloromethane (1:50-1:20) as eluent to yield 280 mg (93%) of 4-(2-methylpiperidin-4-yl)benzonitrile as a colorless oil.

Provenance & Evidence