Sodium Thiosulfate → 7-[4-(2-butoxyethoxy)phenyl]-1-formyl-N-[4-[(S)-hydroxy(1-oxidopyridin-2-yl)methyl]phenyl]-2,3-dihydro-1H-1-benzazepine-4-carboxamide

Participants

Reaction Steps

To a solution of 7-[4-(2-butoxyethoxy)phenyl]-1-formyl-N-[4-[(S)-hydroxy (2-pyridyl)methyl]phenyl]-2,3-dihydro-1H-1-benzazepine-4-carboxamide (225.3 mg) in dichloromethane (20 ml), 3-chloroperbenzoic acid (70%, 113 mg) was added at 0° C., and the mixture was stirred at room temperature for 20 hours. To the reaction solution, sodium thiosulfate solution was added, and the mixture was stirred for several minutes, and extracted with ethyl acetate. The organic layer was washed with sodium bicarbonate solution and saturated brine, dried over magnesium sulfate and concentrated under reduced pressure. The obtained residue was purified by column chromatography (ethanol:ethyl acetate 1:4) and recrystallized from ethyl acetate-diisopropylether to give, as pale yellow crystals 7-[4-(2-butoxyethoxy)phenyl]-1-formyl-N-[4-[(S)-hydroxy(1-oxidopyridin-2-yl)methyl]phenyl]-2,3-dihydro-1H-1-benzazepine-4-carboxamide (Compound 77) (125.5 mg).

Provenance & Evidence