反应详情

2-Ethoxy-4-cyanobenzoic acid (10 g, 52.3 mmol), prepared as in Preparation 10, and thionyl chloride (50 ml,) were refluxed in CH2Cl2 (80 ml) for 5 h. Solvent was removed under vacuum to leave 10.9 g of an off white solid (52 mmol, yield 99%) that was used without further purification.

1. customSolvent was removed under vacuum