Water → HCID 178525714, compound

Participants

Reaction Steps

To a solution of 2,2,2-trifluoro-N-(trans-2-phenylcyclopropyl)-N-(piperidin-4-ylmethyl)acetamide (250 mg, 0.766 mmol) in methanol (20 mL) was added trans-methyl 4-formylcyclohexanecarboxylate (130 mg, 0.766 mmol) and the reaction mixture was heated for 2 minutes to reflux. After cooling to room temperature, sodium cyanoborohydride (96 mg, 1.532 mmol) was added and the reaction mixture was stirred for 1 hour. Water (40 mL) was added. The reaction mixture was concentrated. 50 mL of ethyl acetate was added. The layers were separated. The organic layer was washed with water, brine, dried over MgSO4, filtered and evaporated. The oil was purified by preperatory HPLC (10 to 60% AcCN:water with 0.1% formic acid as modifier. Fractions were combined and evaporated. The resulting oil was dissolved in 10 ml of methanol and 5 mL of 1 M NaOH was added portion wise. The solution was stirred for 1 hour until no protected product was visible by LC-MS. The solution was concentrated, and injected on preperatory HPLC (2 to 20% AcCN:water with 0.1% formic acid as modifier. Fractions were combined 6 M HCl was added (12 mL) and evaporated. trans-4-((4-(((trans-2-phenylcyclopropyl)amino)methyl)piperidin-1-yl)methyl)cyclohexanecarboxylic acid (50 mg, 0.107 mmol, 13.98% yield) was isolated as white solid. 1H NMR (400 MHz, METHANOL-d4) δ 7.29-7.39 (m, 2H), 7.07-7.29 (m, 3H), 3.67 (d, J=12.63 Hz, 2H), 3.36 (d, J=6.82 Hz, 1H), 3.22 (d, J=6.82 Hz, 2H), 2.98-3.10 (m, 4H), 2.63 (ddd, J=3.54, 6.63, 10.29 Hz, 1H), 2.29 (tt, J=3.54, 12.25 Hz, 1H), 2.01-2.24 (m, 5H), 1.92-2.03 (m, 2H), 1.90 (dt, 1H), 1.69-1.85 (m, 2H), 1.64 (ddd, J=4.29, 6.57, 10.61 Hz, 1H), 1.51 (qd, J=3.16, 13.01 Hz, 2H), 1.33-1.45 (m, 1H), 1.03-1.25 (m, 2H); LC-MS Rt=0.50 min; MS (ESI): 371.3 [M+H]+.

Provenance & Evidence