Reaction Steps
A mixture of 3-(2-cyclohexylcarbamoyloxymethyl-4-hydroxy-phenyl)-propionic acid tert-butyl ester (50 mg, 0.13 mmol; Example 652 Step D), [4-(3-bromo-propoxy)-phenyl]-phenyl-methanone (64 mg, 0.2 mmol, Bull Chem. Soc. Jpn. 1990, 63, 1342) and potassium carbonate (53 mg, 0.39 mmol) in acetonitrile (6 mL) was heated at 80° C. overnight. Ethyl acetate (20 mL) and H2O (20 mL) were added. The organic layer was separated, and the aqueous layer was extracted with ethyl acetate (3×). The combined organic layers were dried (MgSO4), filtered, and concentrated. The crude mixture was purified by silica gel column chromatography (hexane/ethyl acetate 4/1) to give the title compound (50 mg, 62%). 1H-NMR (300 MHz, CDCl3): δ 7.74 (d, 2H, J=8.5), 7.68 (d, 2H, J=7.7), 7.48 (d, 1H, J=8.4), 7.40 (m, 2H), 7.05 (d, 1H, J=8.5), 6.90 (d, 2H, J=8.6), 6.85 (s, 1H), 6.74 (dd, 1H, J=8.5, 2.2), 5.04 (s, 2H), 4.68 (d, 1H, J=7.3), 4.17 (t, 2H, J=5.9), 4.09 (t, 2H, J=5.9), 3.43 (m, 1H), 2.82 (t, 2H, J=7.8), 2.40 (t, 2H, J=7.8), 2.21 (qn, 2H, J=5.9), 1.85 (m, 2H), 1.67-1.02 (m, 8H), 1.36 (s, 9H).
