Transformation of Reactive Isochromenylium Intermediates to Stable Salts and Their Cascade Reactions with Olefins
作者:Zhi-Long Hu、Wen-Jian Qian、Sheng Wang、Shaozhong Wang、Zhu-Jun Yao
DOI:10.1021/ol9019524
日期:2009.10.15
reactive isochromenylium intermediates to the corresponding storable and stable reagents has been achieved, and a number of isochromenylium tetrafluoroborates (ICTBs, 1) have been conveniently prepared and characterized. Direct metal-free treatment of isochromenylium tetrafluoroborate 1a with olefins afforded a variety of polycyclic frameworks 4 via mild cascade reactions. Starting from the prefunctionalized