反应详情

To a solution of 3-(4-(4-chloro-3-((R)-1-(2,4-dichlorophenyl)ethylamino)phenyl)piperazin-1-yl)cyclohexanecarboxylic acid (prepared as illustrated in Example 15, 0.077 g, 0.15 mmol) in THF (1 mL) at 0° C. was added sodium borohydride (NaBH4) (0.017 g, 0.5 mmol) and boron trifluoride diethyl etherate (BF3.Et2O) (0.1 mL, 0.8 mmol). The reaction mixture was then stirred at room temperature for 2 h. The reaction was quenched with aqueous saturated sodium bicarbonate and extracted with dichloromethane. The organic layer was dried (Na2SO4), filtered, and concentrated in vacuo. The resulting crude was purified by flash chromatography (SiO2, 10-40% ethyl acetate in hexanes) to afford the desired product as a white solid (0.0074 g, 0.015 mmol, 10%). 1H NMR (400 MHz, CDCl3) δ 7.37-7.32 (m, 2H), 7.17 (dd, J=2.0, 8.0 Hz, 1H), 7.06 (d, J=8.8 Hz, 1H), 6.17 (dd, J=2.8, 8.8 Hz, 1H), 5.78 (d, J=2.4 Hz, 1H), 4.90 (dd, J=5.6, 6.4 Hz, 1H), 4.65 (d, J=5.2 Hz, 1H), 3.54 (d, J=7.2 Hz, 2 μl), 3.03-2.99 (m, 3H), 2.59 (m, 3H), 2.39-2.36 (m, 1H), 2.05-1.95 (m, 1H), 1.75-1.34 (m, 14H); MS: (ES) m/z calculated for C25H33Cl3N3O [M+H]+ 496.2. found 496.3.

1. customThe reaction was quenched with aqueous saturated sodium bicarbonate
2. extractionextracted with dichloromethane
3. dry with materialThe organic layer was dried (Na2SO4)
4. filtrationfiltered
5. concentrationconcentrated in vacuo
6. customThe resulting crude was purified by flash chromatography (SiO2, 10-40% ethyl acetate in hexanes)