反应详情

6,7-Dihydroxychromone-3-carboxylic acid (888 mg) and 25 ml of thionyl chloride were refluxed for one hour. Then, the thionyl chloride was removed by distillation, and after benzene was added, further distillation was conducted. Dichloromethane was added into the residue for solidification, whereby the desired product (719 mg) was obtained.

1. customThen, the thionyl chloride was removed by distillation
2. additionafter benzene was added
3. distillationfurther distillation
4. additionDichloromethane was added into the residue for solidification, whereby the desired product (719 mg)
5. customwas obtained