Abstract
Coumarin derivatives were prepared by the von Pechmann reaction of PEG‐bound acetoacetate reagent with phenols in the presence of TiCl4 in excellent yield and purity with a facile workup procedure. The polymer reagent could be recycled two to four times without diminishing the yield or purity.
Acknowledgment
We gratefully acknowledge financial support from the National Natural Science Foundation (NSF) of China (No. 20562005) and NSF of Jiangxi Province (No. 0620021).