反应详情

To a solution of (R)-1-(1-(3-fluoro-5-(1,1,2,2-tetrafluoroethoxy)phenyl)-1-(4-fluorophenyl)-2-phenylethyl)-3-(1-(hydroxymethyl)cyclopropyl)urea (Example 241, 43 mg, 0.08 mmol) in ether (0.4 mL) was added PPh3 (48 mg, 0.18 mmol) and CBr4 (58 mg, 0.18 mmol) at room temperature. The reaction mixture was stirred for 14 h and concentrated under reduced pressure and purified by ISCO chromatography (4 g column, eluting with 0-15% hexane/EtOAc over 14 min) to yield (R)-1-(1-(bromomethyl)cyclopropyl)-3-(1-(3-fluoro-5-(1,1,2,2-tetrafluoroethoxy)phenyl)-1-(4-fluorophenyl)-2-phenylethyl)urea as a white solid (8 mg, 17% yield). LCMS: RT=4.06 min [M+H] 601.2 (Phenomenex Luna C18 column, 4.6×50 mm eluting with 10-90% MeOH/H2O over 4 minutes containing 0.1% TFA; 4 mL/min, monitoring at 220 nm); 1H NMR (400 MHz, CDCl3) ppm 0.82-1.03 (m, 4H), 3.47 (qt, J=12 Hz, 2H), 3.81 (ABqt, J=12 Hz, 2H), 5.01 (s, 1H), 5.39 (s, 1H), 5.86 (t, J=53 Hz, 1H), 6.61-6.78 (m, 2H), 6.80-7.25 (m, 10H).

1. concentrationconcentrated under reduced pressure
2. custompurified by ISCO chromatography (4 g column, eluting with 0-15% hexane/EtOAc over 14 min)