文献类型：期刊文献

英文题名：An Efficient and Chemoselective Procedure for Acylal Synthesis

作者：Fan, Da-He[2];Wang, Hui[2];Mao, Xing-Xing[1];Shen, Yong-Miao[1]

机构：[1]Shaoxing Univ, Dept Chem, Shaoxing 312000, Peoples R China;[2]Yancheng Inst Technol, Sch Chem & Biol Engn, Yancheng 224003, Peoples R China

年份：2010

卷号：15

期号：9

起止页码：6493

外文期刊名：MOLECULES

收录：SCI-EXPANDED(收录号：WOS:000282221100045)、、Scopus(收录号：2-s2.0-77957310184)、WOS

基金：We greatly appreciate the support of Zhejiang Provincial Natural Science Foundation (Y4080395) and Yancheng Scientific Project (Grant No. YK2009032)..

语种：英文

外文关键词：efficient; novel catalyst; heterogeneous; green process

外文摘要：A novel heterogeneous efficient procedure has been developed for the chemoselective synthesis of acylals (1,1-diacetates) under solvent-free conditions. A novel catalyst prepared by the sulfuric acid catalyzed copolymerization of p-toluenesulfonic acid and paraformaldehyde displays extremely high activities for the title reactions, affording average yields over 90% within several minutes. A comparative study showed that the novel catalyst has much higher activity than other catalysts used for this purpose. Besides, the novel catalyst displays chemoselectivity for the protection of aldehydes in the presence of ketones. In addition the high acidity (4.0 mmol/g), thermal stability (200 degrees C) and easy reusability make the novel catalyst one of the best choices for the process.