Pyridine → HCID 10684544, compound

Participants

Reaction Steps

To a suspension of 3-[(4-t-butylbenzoyl)amino]-2-thiophenecarboxylic acid (8.09 g, 27 mmol) in dry dichloromethane (135 mL) was added oxalyl chloride (11.8 mL, 135 mmol). The mixture was carefully heated with a heat gun in order to dissolve the starting material and initiate the reaction. The heat was then removed and after stirring for 2 h, the solvents were removed in vacuo. The residue was dissolved in dry dichloromethane (135 mL), and pyridine (2.2 mL, 27 mmol) was added. After 1 h, solvent was removed in vacuo. The residue was partitioned between ethyl acetate and water, and the organic phase was washed four times with water and once with brine. The organic phase was then dried over magnesium sulfate, filtered, and the solvent removed in vacuo. The crude product was purified by column chromatography over silica gel using an eluent of 10% ethyl acetate in hexane to afford the product (7.44 g, 96% yield).

Provenance & Evidence