反应详情

Oxalyl chloride (3.66 g, 0.029 mol) was added dropwise to a stirred solution of 5-acetyl-2-ethoxybenzoic acid (3.0 g, 0.014 mol) in dichloromethane (15 ml) and dimethylformamide (0.1 ml). After 3 hours at room temperature, the solvent was removed by evaporation under vacuum and the residue azeotroped with hexane (3×30 ml) to give the title compound, which was used without further purification.

1. customthe solvent was removed by evaporation under vacuum
2. customthe residue azeotroped with hexane (3×30 ml)