Sodium hydride (0.240 g, 5.99 mmol, 60% dispersion in mineral oil) was added to DMF (8 ml) and cooled to 0° C. A solution of N-(2-hydroxypropyl)-1-benzofuran-2-carboxamide (0.6 g, 2.92 mmol) in DMF (1.5 ml) was added and allowed to stir for 10 min at 0° C. and then for 15 min at rt. The product of Example 29 (0.383 g, 0.87 mmol) was then added in one portion and the reaction was allowed to stir overnight. The reaction was then quenched with water, extracted with EtOAc, washed with water, brine, dried over MgSO4, and concentrated in vacuo to provide an oil which was chromatographed using hexane to 2/1 hexane/EtOAc as eluant to provide the product as a mixture of esters which was used directly in the next reaction. The mixture of esters (233 mg) was dissolved in THF:MeOH:H2O (1.2 mL:0.7 mL:1.2 mL) and LiOH (13.7 mg, 0.32 mmol) was added. The reaction was heated at reflux overnight. The reaction was cooled to rt, quenched with 6M HCl and extracted with CH2Cl2. The organics were washed with brine, dried over Na2SO4, concentrated in vacuo to provide an oil which was chromatographed using hexane to 9/1 CH2Cl2/MeOH as eluant to provide 80 mg (44% yield) of the product acid. Electrospray Mass Spec: m/z 597.2 (M−H)−.
