Reaction Steps
A solution of 3-[[3-(4-nitrophenoxy)phenyl][[3-(1,1,2,2-tetrafluoroethoxy) phenyl]-methyl]amino]-1,1,1-trifluoro-2-propanol (33.8 mg, 0.06 mmol) in ethanol and 5% palladium on carbon (4 mL) was placed under 40 psi hydrogen gas for 7H. The mixture was filtered through celite, the solvent was evaporated, and the residue was purified by silica gel chromatography eluting with 25% ethyl acetate in hexane to give 13.4 mg (42%) of (EX-450A) as 3-[[3(4-aminophenoxy)phenyl][[3-(1,1,2,2-tetrafluoroethoxy) phenyl]methyl]amino]-1,1,1-trifluoro-2-propanol and 13.9 mg (41%) of (EX-450B) as 3-[[3-[4-(ethylamino)phenoxy]phenyl][[3-(1,1,2,2-tetrafluoroethoxy)phenyl]methyl]amino]-1,1,1-trifluoro-2-propanol both as orange oils. 3-[[3-(4-aminophenoxy)phenyl][[3-(1,1,2,2-tetrafluoroethoxy)phenyl]methyl]-amino]-1,1,1-trifluoro-2-propanol: HRMS calcd. for C24H22F7N2)3: 519.1519 [M+H]+, found: 519.1529. 1H NMR (acetone-d6) δ3.63 (dd, 1H), 3.96 (dd, 1H), 4.42-4.58 (m, 1H), 4.80 (s, 2H), 5.88 (m, 1H), 6.20 (m, 1H), 6.32-6.77 (m, 6H), 6.92 (d, 1H), 7.06-7.26 (m, 3H), 7.43 (m, 1H). 3-[[3-[4-(ethylamino)phenoxyphenyl][[3-(1,1,2,2-tetrafluoroethoxy) phenyl]-methyl]amino]-1,1,1-trifluoro-2-propanol: HRMS calcd. for C26H26F7N2O3: 547.1832 [M+H]+. found: 547.1819. 1H NMR (acetone-d6) δ1.23 (t, 3H), 3.17 (q, 2H), 3.63 (dd, 1H), 3.96 (dd, 1H), 4.424.58 (m, 1H), 4.79 (s, 2H), 5.85 (d, 1H), 6.20 (m, 1H), 6.33 (m, 1H), 6.47 (m, 1H), 6.50 (tt, 1J), 6.61 (d, 2H), 6.78 (d, 2H), 7.09 (t, 1H), 7.20 (m, 1H), 7.23 (d, 1H), 7.42 (m, 1H).
