反应详情

温度

110 °C

(trans)-4-(1,1-difluoroethyl)cyclohexyl methanesulfonate (WO 2010051030) (0.98 mmol, 236 mg, 1.0 eq.), methyl 1-((6-hydroxynaphthalen-2-yl)methyl)azetidine-3-carboxylate (1.17 mmol, 317 mg, 1.2 mmol) and Cs2CO3 (4.41 mmol, 1.4 g, 4.5 eq.) were dissolved in t-butanol (4 mL) and 2-butanone (2 mL). The mixture was stirred at 110° C. for 16 h. 1 M aq. HCl solution was added to the mixture to adjust pH=6. Then the mixture was extracted with EtOAc. The organic layer was purified by silica gel column chromatography using DCM/CH3OH (10/1) as eluent to give product (7 mg, 1.8%) as a white solid. ESI-MS (M+1)+: 404.1. HPLC: 89.46%. 1H NMR (400 MHz, CD3OD) δ: 7.89 (s, 1H), 7.86-7.81 (m, 2H), 7.46 (dd, 1H), 7.31 (s, 1H), 7.19 (dd, 1H), 4.47 (s, 2H), 4.43-4.41 (m, 1H), 4.21 (d, 4H), 3.45-3.41 (m, 1H), 2.32-2.30 (m, 2H), 2.02-1.99 (m, 2H), 1.64-1.54 (m, 3H), 1.51-1.45 (m, 3H), 1.36-1.28 (m, 2H).

1. extractionThen the mixture was extracted with EtOAc
2. customThe organic layer was purified by silica gel column chromatography