反应详情

A mixture of 6,7-Diacetoxychromone-3-carboxylic acid (918 mg, 3 mmol), benzene (20 ml), thionyl chloride (260 μl, 3.6 mmol) and N,N-dimethylformamide (0.2 ml) was refluxed for 2 hours and the solvent was removed. Benzene (5 ml) was added and then evaporated. This was repeated twice to remove traces of thionyl chloride. The residual solid was collected to afford the desired compound.

1. temperaturewas refluxed for 2 hours
2. customthe solvent was removed
3. additionBenzene (5 ml) was added
4. customevaporated
5. customto remove traces of thionyl chloride
6. customThe residual solid was collected