反应详情

温度

80 °C

To a stirring mixture of methyl 1-(2,2,2-trifluoro-1-(6-hydroxynaphthalen-2-yl)ethyl)piperidine-4-carboxylate (300 mg, 0.8 mmol), cis-4-(t-butyl)cyclohexanol (245 mg, 1.6 mmol, 2 eq) and PPh3 (420 mg, 1.6 mmol, 2 eq) in THF (3 mL) was added DIAD (323 g, 1.6 mmol, 2 eq) at room temperate under N2 atmosphere. The mixture was stirred at 80° C. for 2 h, diluted with ethyl acetate (10 mL) and washed with water (5 mL*3). The organic solvent was removed in vacuum and the residue was purified by silica gel chromatography (petroleum ether:ethyl acetate=1:1) to give methyl 1-(1-(6-(trans-4-tert-butylcyclohexyloxy)naphthalen-2-yl)-2,2,2-trifluoroethyl)piperidine-4-carboxylate (130 mg, yield: 31%) as a yellow solid. ESI-MS (M+1)+: 506.1. 1HNMR (400 MHz, CDCl3) δ: 7.86˜7.80 (m, 3H), 7.46 (d, J=8.8 Hz, 1H), 7.27 (s, 1H), 7.16 (d, J=8.8 Hz, 1H), 4.68˜4.66 (m, 1H), 4.39˜4.36 (m, 1H), 3.56 (s, 3H), 3.32˜3.30 (m, 2H), 2.65˜2.64 (m, 1H), 2.44-2.43 (m, 1H), 2.30-2.27 (m, 3H), 1.93-1.90 (m, 3H), 1.80-1.79 (m, 2H), 1.44˜1.41 (m, 2H), 1.29˜1.27 (m, 3H), 1.14˜1.13 (m, 1H), 0.90 (s, 9H).

1. washwashed with water (5 mL*3)
2. customThe organic solvent was removed in vacuum
3. customthe residue was purified by silica gel chromatography (petroleum ether:ethyl acetate=1:1)