Reaction Steps
Dissolve (3R,5R)-3-[1-methyl-1-(6-trifluoromethyl-pyridin-2-yl)-ethylamino]-5-(3-hydroxy-phenyl)-1-(4-trifluoromethyl-phenyl)-pyrrolidin-2-one (520 mg, 0.99 mmol) in DMF (9 mL) and add cesium carbonate (1.9 g, 5.9 mmol) and 1-bromo-3-fluoro-propane (170 mg, 1.19 mmol). Stir the mixture at ambient temperature for 19.5 hours and dilute with EtOAc. Wash with brine, dry over sodium sulfate, filter, and concentrate the organic to residue. Purify the residue by silica gel chromatography (30% EtOAc-hexane) to obtain (3R,5R)-3-[1-methyl-1-(6-trifluoromethyl-pyridin-2-yl)-ethylamino]-5-[3-(3-fluoro-propoxy)-phenyl]-1-(4-trifluoromethyl-phenyl)-pyrrolidin-2-one (447 mg, 77%) as a colorless oil. 1H NMR (400 MHz, DMSO-d6): δ 8.08 (d, J=7.9 Hz, 1H), 8.01 (dd, J=7.7, 7.7 Hz, 1H), 7.70 (d, J=7.5 Hz, 1H), 7.58 (d, J=8.8 Hz, 2H), 7.51 (d, J=8.8 Hz, 2H), 7.13 (dd, J=7.9, 7.9 Hz, 1H), 6.82-6.70 (m, 3H), 5.18 (dd, J=9.7, 6.6 Hz, 1H), 4.58 (t, J=5.9 Hz, 1H), 4.46 (t, J=5.9 Hz, 1H), 4.02-3.88 (m, 2H), 3.47-3.39 (m, 1H), 2.96 (d, J=3.5 Hz, 1H), 2.73-2.63 (m, 1H), 2.06-1.92 (m, 2H), 1.63 (dd, J=22.0, 10.5 Hz, 1H), 1.47 (s, 3H), 1.42 (s, 3H). LC-MS ESI m/z: 584.0 (M+H)+, Tr=3.61 min., method 1.
