Ammonium formate → 1-(4-Piperidinyl)-1H-benzimidazole

Participants

Reaction Steps

To a solution of 196 mg of 1-(1-benzyl-piperidin-4-yl)-1-H-benzoimidazole (from Step B) in 10 mL of CH3OH was added 200 mg 10% palladium on carbon and 200 mg ammonium formate. After the reaction was refluxed for 4 hours, the mixture was cooled down to room temperature, filtered through Celite and washed with CH3OH. The filtrate was concentrated under reduced pressure to give 160 mg of the title compound as oil. 1H NMR (400 MHz, CD3OD): δ2.13(m, 4H), 2.92(m, 2H), 3.27(m, 2H), 4.56(m, 1H), 7.28(m, 2H), 7.66(t, J=5.9 Hz, 2H), 8.25(s, 1H). ESI-MS 201 (M+H); HPLC A: 0.61 min.

Provenance & Evidence