反应详情

(4-Hydroxy-4-{4-[6-(6-trifluoromethyl-pyridin-3-ylamino)-pyridin-3-yl]phenyl}piperidin-1-yl)-acetic acid ethyl ester (137 mg, 0.27 mmol) was dissolved in THF/MeOH/DMF (3:1:1, 5 mL) and to the solution was added aqueous LiOH (4M, 1 mL). The mixture was stirred at room temperature for 18 hours, then the reaction mixture was filtered and purified by reverse-phase preparative HPLC to give the title compound: 1H NMR (400 MHz, DMSO-d6) ppm 1.54 (qd, J=12.38, 4.29 Hz, 1 H) 1.42 (qd, J=12.51, 4.42 Hz, 1 H) 1.77 (td, J=14.08, 1.14 Hz, 2 H) 2.78 (m, 1 H) 2.98 (td, J=12.63, 2.27 Hz, 1 H) 3.29 (s, 2 H) 3.87 (dd, J=11.37, 2.27 Hz, 1 H) 4.39 (ddd, J=12.69, 1.83, 1.64 Hz, 1 H) 7.04 (d, J=8.59 Hz, 1 H) 7.32 (d, J=8.34 Hz, 2 H) 7.61 (d, J=8.34 Hz, 2 H) 7.80 (d, J=8.84 Hz, 1 H) 7.99 (dd, J=8.72, 2.65 Hz, 1 H) 8.55-8.62 (m, 1 H) 8.57 (d, J=2.53 Hz, 1 H) 8.92 (d, J=2.27 Hz, 1 H) 9.93 (s, 1 H); (M+H)+ 473.3.

1. filtrationthe reaction mixture was filtered
2. custompurified by reverse-phase preparative HPLC