1-((2R,3R)-1-(benzyloxy)-4,4,4-trifluoro-3-hydroxybutan-2-yl)-3-((R)-1-(3-fluoro-5-(1,1,2,2-tetrafluoroethoxy)phenyl)-1-(4-fluorophenyl)-2-phenylethyl)urea → 1-((R)-1-(3-fluoro-5-(1,1,2,2-tetrafluoroethoxy)phenyl)-1-(4-fluorophenyl)-2-phenylethyl)-3-((2R,3R)-4,4,4-trifluoro-1,3-dihydroxybutan-2-yl)urea

Participants

Reaction Steps

To a solution of 1-((2R,3R)-1-(benzyloxy)-4,4,4-trifluoro-3-hydroxybutan-2-yl)-3-((R)-1-(3-fluoro-5-(1,1,2,2-tetrafluoroethoxy)phenyl)-1-(4-fluorophenyl)-2-phenylethyl)urea (Example 236, 17 mg, 0.024 mmol) in THF (1 mL) was added 20% Pd(OH)2/C (8 mg) and the slurry was subjected to balloon hydrogenation for 18 h. The reaction mixture was filtered and the filtrate was concentrated and purified by preparative HPLC (Shimadzu-YMC-ODS-A 5μ column, 30×100 mm eluting with 30-100% MeOH (90% in H2O, 0.1% TFA) gradient over 12 min with flow rate 40 mL/min and UV detection at 220 nm) to yield 1-((R)-1-(3-fluoro-5-(1,1,2,2-tetrafluoroethoxy)phenyl)-1-(4-fluorophenyl)-2-phenylethyl)-3-((2R,3R)-4,4,4-trifluoro-1,3-dihydroxybutan-2-yl)urea (Example 237) eluting at a retention time of 11.54 min as a clear oil (11 mg, yield 78%). LCMS: RT=1.983 min [M+H] 611.26 (Phenomenex Luna C18 column, 4.6×30 mm eluting with 10-90% MeOH/H2O over 2 minutes containing 0.1% TFA, 5 mL/min, monitoring at 220 nm); HPLC: RT=4.081 min, Purity 100% (Phenomenex Luna C18 column, 4.6×50 mm eluting with 10-90% MeOH/H2O over 4 minutes containing 0.2% PPA; 4 mL/min, monitoring at 220 nm); NMR: 400 MHz 1H (CDCl3) 7.20 ppm, 1H, s; 7.16 ppm, 5H, m; 6.99 ppm, 2H, m; 6.91 ppm, 3H, m; 6.70 ppm, 2H, d, J=7.47 Hz; 5.87 ppm, 1H, m; 5.38 ppm, 1H, d, J=7.47 Hz; 5.35 ppm, 1H, s; 4.28 ppm, 1H, d, J=5.71 Hz; 4.11 ppm, 2H, m; 3.94 ppm, 2H, d, J=7.91 Hz; 3.82 ppm, 1H, m; 3.73 ppm, 1H, m; 3.67 ppm, 1H, d, J=8.35 Hz.

Provenance & Evidence