Triethylamine → 4-Cyano-3-methyl-N-(4-trifluoromethyl-phenyl)-benzamide

Participants

Reaction Steps

A mixture of 4-cyano-3-methyl-benzoic acid from Example E6 (750 mg, 4.6 mmol) and thionyl chloride (1.02 ml, 14.0 mmol) in toluene (40 ml) was heated at reflux for 2 h. After cooling at room temperature, solvents were re-moved in vacuo and azeotroped with toluene. The residue was redissolved in dichloromethane (25 ml) then 4-trifluoromethylaniline hydrochloride (1.11 g, 5.6 mmol) in dichloromethane (5 ml) and triethylamine (1.95 ml, 14.0 mmol) was added. The mixture was stirred at room temperature for 2 days, washed with brine, dried and concentrated in vacuo. The residue was purified by flash chromatography on silica gel through an isolute (eluant; 20% EtOAc:80% cyclohexane) to yield the title compound (1.13 g, 80%).

Provenance & Evidence