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0 °C

A slurry of 2-Methyl-3-(4-{2-[2-oxo-1-(4-trifluoromethyl-benzyl)-imidazolidin-4-yl]-ethoxy}-phenyl)-2-phenoxy-propionic acid ethyl ester (0.544 g, 0.953 mmol) and sodium hydride (0.042 g, 1.05 mmol, 60% dispersion on mineral oil) in DMF (10 mL) was stirred for 1 h, then cooled to 0° C. Iodomethane (0.60 mL, 9.53 mmol, d=2.28) was added, then the reaction mixture is stirred 18 hours at ambient temperature and diluted with ethyl acetate. The organic layer is washed, dried, concentrated, and purified by flash chromatography to provide the title compound. 1H NMR (400 MHz, CDCl3): δ 7.56 (d, 2H, J=8.0 Hz), 7.37 (d, 2H, J=8.0 Hz), 7.26-7.19 (m, 2H), 7.15 (d, 2H, J=8.9 Hz), 6.97 (t, 1H, J=8.0 Hz), 6.82 (d, 2H, J=8.0 Hz), 6.74 (d, 2H, J=8.9 Hz), 4.46, 4.38 (ABq, 2H, J=15.1 Hz), 4.20 (q, 2H, J=7.1 Hz), 3.97 (t, 2H, J=7.1 Hz), 3.67-3.59 (m, 1H), 3.78 (t, 1H, J=8.9 Hz), 3.26, 3.10 (ABq, 2H, J=14.2 Hz), 2.99 (t, 1H, J=8.9 Hz), 2.85 (s, 3H), 2.28-2.21 (m, 1H), 1.93-1.84 (m, 1H), 1.39 (s, 3H), 1.21 (t, 3H, J=7.1 Hz). MS [EI+] 585 (M+H)+. Rf=0.35 in 50% acetone in hexanes.

1. washThe organic layer is washed
2. customdried
3. concentrationconcentrated
4. custompurified by flash chromatography