To a solution of rac-6-chloro-3-(3-chloro-benzyl)-3-piperidin-3-yl-1,3-dihydro-indol-2-one (0.1 g, 0.27 mmol) (from Example 25a supra) in dichloromethane (2 mL) was added triethyl amine (67.5 mg, 0.68 mmol) (Aldrich), followed by the addition of solution of 4-isocyanato-phenol (1.8 mL, 0.32 mmol) in toluene (from Example 78a supra). The mixture was stirred at room temperature for 30 minutes. The mixture was partitioned between dichlormethane and water. The aqueous layer was extracted with dichlormethane. The combined organic layer was washed with water, brine, dried over MgSO4 and concentrated. The residue was purified by chromatography to give rac-3-[6-chloro-3-(3-chloro-benzyl)-2-oxo-2,3-dihydro-1H-indol-3-yl]-piperidine-1-carboxylic acid (4-hydroxy-phenyl)-amide as a white solid. (Yield 15 mg, 11%).
