反应详情

A mixture of 7,8-dihydroxychromone-3-carboxylic acid (6.6 g, 30 mmol) and thionyl chloride (25 ml) was refluxed for 1 hour, and the thionyl chloride was removed. After the addition of benzene to the residue, the mixture was evaporated to dryness and the residue was triturated with n-hexane to give the desired compound (7.2 g).

1. temperaturewas refluxed for 1 hour
2. customthe thionyl chloride was removed
3. additionAfter the addition of benzene to the residue
4. customthe mixture was evaporated to dryness
5. customthe residue was triturated with n-hexane