Potassium Carbonate → 7-[4-(2-butoxyethoxy)phenyl]-1-ethyl-N-[4-[[methyl(tetrahydropyran-4-yl)amino]methyl]phenyl]-2,3-dihydro-1-benzazepine-4-carboxamide

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Reaction Steps

In a mixture of water:ethanol:toluene (1:1:10, v/v, 18.0 ml) were dissolved 4-(2-butoxyethoxy)phenyl borate (301 mg) and 7-bromo-1-ethyl-N-[4-[[N-methyl-N-(tetrahydro-2H-pyran-4-yl)amino]methyl]phenyl]-2,3-dihydro-1H-1-benzazepine-4-carboxamide (420 mg). To the solution was added potassium carbonate (279 mg), and the mixture was stirred under argon atmosphere at room temperature for 30 minutes. To the mixture was added tetrakistriphenylphosphinepalladium (39 mg), and the mixture was refluxed under argon atmosphere for 14 hours. The mixture was diluted with ethyl acetate, and washed with water and saturated brine, and the organic layer was dried with anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure, and the residue was purified with silica gel column chromatography (30 g, ethyl acetate→ethyl acetate:ethanol=10:1→ethyl acetate:ethanol:triethylamine=100:10 0.5) and recrystallized from ethyl acetate/IPE to give 7-[4-(2-butoxyethoxy)phenyl]-1-ethyl-N-[4-[[N-methyl-N-(tetrahydro-2H-pyran-4-yl)amino]methyl]phenyl]-2,3-dihydro-1-H-1-benzazepine-4-carboxamide (Compound 19) (218 mg, 42%) as yellow crystals.

Provenance & Evidence