To a solution of 7-[4-(2-butoxyethoxy)phenyl]-1-trifluoroacetyl-2,3-dihydro-1H-1-benzazepine-4-carboxylic acid (0.5 g) and 1-hydroxybenzotriazole (0.30 g), (4-aminophenyl)(3-propoxypyridin-2-yl)methanol (0.30 g) in DMF (10 ml) were added 1-ethyl-3-(3′-dimethylaminopropyl)carbodiimide hydrochloride (0.40 g), triethylamine (0.6 ml) and 4-dimethylaminopyridine (1 flake) at room temperature and the mixture was stirred for 24 hours. To the reaction solution was added water, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine, dried over magnesium sulfate and concentrated under reduced pressure. The obtained residue was separated and purified by column chromatography (ethyl acetate:hexane 1:1) to give 7-[4-(2-butoxyethoxy)phenyl]-N-[4-[hydroxy(3-propoxypyridin-2-yl)methyl]phenyl]-1-trifluoroacetyl-2,3-dihydro-1H-1-benzazepine-4-carboxamide (Compound 111) (528.7 mg) as pale yellow crystals.
