Abstract
Various types of aldehydes and ketones could be converted to their corresponding diethyl acetals with triethylorthoformate in the presence of solid superacid in good to excellent yield under mild reaction conditions.
Acknowledgments
The work was supported by NSFC (29872011 and 29572039), Education Ministry of China and Education Department of Hebei Province (990104) and Science and Technology Commission of Hebei Province.