文献类型：期刊文献

英文题名：Synthesis of coumarin by Yb(OTf)₃ catalyzed Pechmann reaction under the solvent-free conditions

作者：Wang, LM; Xia, JJ; Tian, H; Qian, CT; Ma, Y

机构：[1]E China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Shanghai Inst Organ Chem, Organomet Chem Lab, Shanghai 200032, Peoples R China;[3]Cornell Univ, Dept Chem, Ithaca, NY 14850 USA

年份：2003

卷号：42

期号：9

起止页码：2097

外文期刊名：INDIAN JOURNAL OF CHEMISTRY SECTION B-ORGANIC CHEMISTRY INCLUDING MEDICINAL CHEMISTRY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000185795700011)，CCR-EXPANDED(收录号:WOS:000185795700011)】；

语种：英文

摘要：Yb(OTf)(3) is used as an alternative to conventional acid catalysts in the Pechmann condensation reaction of phenols with beta-keto esters leading to the formation of coumarin derivatives. This new method has the advantage of high yields, solvent-free conditions, short reaction times and reusability of the catalyst with no loss of yield. Ytterbium triflate catalyzed Pechmann reaction. applied to synthesis of coumarin derivatives is simple and environmentally friendly process.