反应详情

[2-(6-Methoxy-[1,5]naphthyridin-4-yl)-4,5,6,7-tetrahydro-2H-indazol-5-yl]-(2-phenoxy-ethyl)-carbamic acid tert-butyl ester. To a solution of [2-(6-methoxy-[1,5]naphthyridin-4-yl)-4,5,6,7-tetrahydro-2H-indazol-5-yl]carbamic acid tert-butyl ester (104 mg, 0.260 mmol) in DMF (2.6 mL) was added NaH (60% in mineral oil, 27 mg, 0.66 mmol) at 0° C. The reaction mixture was warmed to RT and stirred for 30 min. Upon cooling the reaction mixture to 0° C., β-bromophenetole (78 mg, 0.39 mmol) was added. The mixture was warmed to RT, and treated with additional NaH (31 mg, 1.3 mmol) and β-bromophenetole (261 mg, 1.30 mmol). After 30 h, H2O (30 mL) and EtOAc (40 mL) were added to the reaction mixture. The organic layer was separated, washed with brine (20 mL), dried (MgSO4), filtered, and concentrated. The crude was purified on SiO2 (0-100% EtOAc/hexanes) to give 65 mg (48%) of the title compound as a white solid. MS (ESI): exact mass calculated for C29H33N5O4, 515.25; m/z found, 516.4 [M+H]+. 1H NMR (500 MHz, CDCl3): 9.09 (br s, 1H), 8.77 (d, J=5.0, 1H), 8.26 (d, J=9.1, 1H), 8.15 (d, J=5.0, 1H), 7.30-7.27 (m, 2H), 7.18 (d, J=9.1, 1H), 6.97-6.92 (m, 1H), 6.90 (d, J=7.8, 2H), 4.16-4.04 (m, 6H), 3.65-3.59 (m, 2H), 3.09-3.05 (m, 1H), 2.92 (br s, 3H), 2.11 (br s, 2H), 1.49 (s, 9H).

1. temperatureUpon cooling the reaction mixture to 0° C.
2. temperatureThe mixture was warmed to RT
3. waitAfter 30 h
4. customThe organic layer was separated
5. washwashed with brine (20 mL)
6. dry with materialdried (MgSO4)
7. filtrationfiltered
8. concentrationconcentrated
9. customThe crude was purified on SiO2 (0-100% EtOAc/hexanes)