Abstract
A general and practical chemistry route to the synthesis of compounds containing two 4H‐pyrans or two tetraketones in aqueous media is described. This method provides several advantages such as neutral conditions, high yields, and simple workup procedure. In addition, water was chosen as a green solvent.
Acknowledgments
This project was supported by the National Natural Science Foundation of China (29872011 and 29572039), Educational Ministry of China, Educational Department of Hebei Province (990104), Science and Technology Commission of Hebei Province.