Dimethylformamide → 7-[4-(2-butoxyethoxy)phenyl]-1-isobutyl-N-[4-[(isoxazol-5-ylmethyl)sulfanyl]phenyl]-2,3-dihydro-1-benzazepine-4-carboxamide

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Reaction Steps

To a solution of 7-[4-(2-butoxyethoxy)phenyl]-1-isobutyl-2,3-dihydro-1-benzazepine-4-carboxylic acid (700 mg) in tetrahydrofuran (15 ml) was added one droplet of DMF. Then, thionyl chloride (0.15 ml) was added to the mixture at 0° C., and the mixture was allowed to be at room temperature and stirred for 1 hour under nitrogen atmosphere. This solution was added to a solution of 4-[(isoxazol-5-ylmethyl)sulfanyl]aniline (429 mg) and triethylamine (5.8 ml) in tetrahydrofuran (15 ml) at 0° C. The mixture was stirred for 1.5 hours at room temperature under nitrogen atmosphere, water was added to the mixture, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine, and dried over magnesium sulfate. The solvent was distilled off under reduced pressure. The obtained residue was purified by silica gel column chromatography (hexane:ethyl acetate=3:1) and was recrystallized from hexane-ethyl acetate, to give 7-[4-(2-butoxyethoxy)phenyl]-1-isobutyl-N-[4-[(isoxazol-5-ylmethyl)sulfanyl]phenyl]-2,3-dihydro-1-benzazepine-4-carboxamide (557 mg) (Compound 327) as yellow crystals.

Provenance & Evidence