反应详情

温度

70 °C

To the crude HCl salt (0.18 g, ˜0.5 mmol) of 4-[3-(4-methanesulfonyl-phenoxymethyl)-[1,2,4]oxadiazol-5-yl]-piperidine, prepared by treatment of 4-[3-(4-methanesulfonyl-phenoxymethyl)-[1,2,4]oxadiazol-5-yl]-piperidine-1-carboxylic acid tert-butyl ester (Example 81) in dioxane with 4N HCl, was added 2-propanol (3 mL), followed by DIPEA (0.13 g, 1 mmol) and 2-Chloro-5-ethyl-pyrimidine (0.14 g, 1 mmol). The resulting mixture was stirred at 70° C. overnight. After concentration in vacuo, the residue was purified by silica column chromatography with EtOAc/hexanes to afford the desired product. 1H NMR (CDCl3): δ 8.18 (2H, s), 7.89 (2H, d, J=8.8 Hz), 7.15 (2H, d, J=8.8 Hz), 5.24 (2H, s), 4.75˜4.65 (2H, m), 3.3˜3.2 (1H, m), 3.2˜3.1 (2H, m), 3.03 (3H, s), 2.47 (2H, q, J=7.6 Hz), 2.22˜2.16 (2H, m), 1.96˜1.84 (2H, m), 1.19 (3H, t, J=7.6 Hz).

1. concentrationAfter concentration in vacuo
2. customthe residue was purified by silica column chromatography with EtOAc/hexanes