General Procedure E. To a solution of 1-benzyl-6-(ethoxylcarbonyl)-2-isopropyl-1H-indole-3-carboxylic acid (Compound 39, 1.00 g, 2.74 mmol) in CH2Cl2 (10 ml) was added EDC (1.04 g, 5.84 mmol) and DMAP (500 mg, 4.11 mmol), followed by 3,4-difluorobenzylamine (589 mg, 4.11 mmol). The reaction was stirred at room temperature for 12 h, diluted with EtOAc, washed with H2O, brine, dried over Na2SO4 and concentrated in vacuo. The residue was purified by chromatography on silica gel (0→35% EtOAc-hexanes) to yield the title compound as a yellow solid.
