A stirred solution of 2,6-dichloro-4-(methoxycarbonyl)benzoic acid (750 mg, 3 mmol, intermediate 32), 1-hydroxy-7-azabenzotriazole (614 mg, 4.5 mmol), dimethylaminopyridine (183 mg, 1.5 mmol), 2-(1H-7-azabenzotriazol-1-yl)-1,1,3,3-tetramethyl uronium hexafluorophosphate methanaminium (1170 mg, 4.5 mmol) in N,N-dimethylacatamide was treated with N-(1H-pyrrolo[3,2-c]pyridin-4-yl)cyclopropane carboxamide (605 mg, 3 mmol, intermediate 28) and Hunig's base (1.33 ml, 7.5 mmol). The reaction mixture was stirred at room temperature for about 1 hour and was heated at 50° C. for about 5 hours. To the reaction mixture, ice cold water was added and the precipitated solid was filtered, washed with water and dried. The solid thus obtained was purified by silica gel (100-200 mesh) column chromatography using methanol and dichloromethane gradient elution to afford methyl 3,5-dichloro-4-({4-[(cyclopropylcarbonyl)amino]-1H-pyrrolo[3,2-c]pyridin-1-yl}carbonyl)benzoate (600 mg, 47%) as an off-white solid.
