反应详情

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 preparatory 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 preparatory 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]+.

1. temperaturethe reaction mixture was heated for 2 minutes
2. temperatureto reflux
3. concentrationThe reaction mixture was concentrated
4. addition50 mL of ethyl acetate was added
5. customThe layers were separated
6. washThe organic layer was washed with water, brine
7. dry with materialdried over MgSO4
8. filtrationfiltered
9. customevaporated
10. customThe oil was purified by preparatory HPLC (10 to 60% AcCN
11. customevaporated
12. dissolutionThe resulting oil was dissolved in 10 ml of methanol
13. addition5 mL of 1 M NaOH was added portion wise
14. stirringThe solution was stirred for 1 hour until no protected product
15. concentrationThe solution was concentrated
16. additionwas added (12 mL)
17. customevaporated