1-Hydroxybenzotriazole → 7-[4-(2-butoxyethoxy)phenyl]-1-(2-methylthiazol-4-yl)-N-[4-[[N-methyl-N-(tetrahydro-2H-pyran-4-yl)amino]methyl]phenyl]-2,3-dihydro-1H-1-benzazepine-4-carboxamide

Participants

Reaction Steps

In DMF (20 ml) were suspended 7-[4-(2-butoxyethoxy)phenyl]-1-(2-methylthiazol-4-yl)-2,3-dihydro-1H-1-benzazepine-4-carboxylic acid (0.13 g), 4-[N-methyl-N-(tetrahydro-2H-pyran-4-yl)aminomethyl]aniline dihydrochloride (0.1 g) and 1-hydroxybenzotriazole (0.06 g). Under ice-cooling, to the suspension were added 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (0.15 g), triethylamine (0.18 ml) and 4-dimethylaminopyridine (catalytic amount), and the mixture was stirred at room temperature overnight, which was poured into water and extracted with ethyl acetate. The organic layer was washed with water and saturated brine, and dried with anhydrous magnesium sulfate, and the solvent was evaporated. The residue was purified with silica gel column (ethyl acetate/methanol/triethylamine) to give crude crystals, which were recrystallized from ethyl acetate-diethyl ether-hexane to give 7-[4-(2-butoxyethoxy)phenyl]-1-(2-methylthiazol-4-yl)-N-[4-[[N-methyl-N-(tetrahydro-2H-pyran-4-yl)amino]methyl]phenyl]-2,3-dihydro-1H-1-benzazepine-4-carboxamide (Compound 45) (0.087 g) as pale yellow crystals.

Provenance & Evidence