文献类型：期刊文献

英文题名：A highly efficient BF3·Et2O-catalysed intramolecular [3+2] cycloaddition for the synthesis of 3,4- dihydrobenzopyrano[3,4-c]pyrazoles

作者：Wang, Wei-Liang[1]; Feng, Yu-Lan[1]; Gao, Wen-Qiang[1]; Luo, Xiaoyan[1]; Deng, Wei-Ping[1]

机构：[1] Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China

年份：2013

卷号：3

期号：6

起止页码：1687

外文期刊名：RSC Advances

收录：EI(收录号：20130415921407)

语种：英文

外文关键词：Positive ions

摘要：A highly efficient BF3·Et2O catalysed intramolecular [3+2] cycloaddition of tosylhydrazone with alkyne has been developed, and a variety of potentially bioactive 1,8-disubstituted-3,4- dihydrobenzopyrano[3,4-c]pyrazoles 7 were obtained with good to excellent yields of up to 93%. ? 2012 The Royal Society of Chemistry.