Dimethylformamide → HCID 59351688, compound

Participants

Reaction Steps

To a mixture of methyl 5-ethyl-2-[(4-phenylbutanoyl)amino]thiophene-3-carboxylate (15 g) and N,N-dimethylformamide (150 mL) was added 60% sodium hydride (2.17 g), and the mixture was stirred at room temperature for 15 min. To the reaction mixture was added 4′-(bromomethyl)biphenyl-2-carbonitrile (14.8 g), and the mixture was further stirred for 3 hr. The reaction mixture was diluted with ethyl acetate, washed with 5% potassium hydrogensulfate and then saturated brine, and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure. After purification by silica gel column chromatography, the obtained residue was dissolved in tetrahydrofuran (200 mL), potassium tert-butoxide (5.3 g) was added, and the mixture was stirred at room temperature for 16 hr. The reaction mixture was extracted with saturated aqueous ammonium chloride solution and ethyl acetate. The obtained ethyl acetate layer was washed with saturated brine, and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure. The obtained residue was purified by silica gel column chromatography to give the title compound as a colorless oil (4.89 g, 22%).

Provenance & Evidence