反应详情

A solution of 5-chloro-1-benzofuran-2-carboxylic acid (827 mg, 42 mmol) in thionyl chloride (4 mL) was refluxed over night. The solvent was removed in vacuo to give the 5-chloro-1-benzofuran-2-carbonyl chloride in quantitative yield.

1. customThe solvent was removed in vacuo