Sequential Rhodium-, Silver-, and Gold-Catalyzed Synthesis of Fused Dihydrofurans
作者:Hengbin Wang、Justin R. Denton、Huw M. L. Davies
DOI:10.1021/ol2016548
日期:2011.8.19
A triple cascade process was developed for the rapid synthesis of polycyclic benzo-fused dihydrofurans. The first step is a rhodium-catalyzedcyclopropanation of α-aryldiazoketones with alkenes. This is followed by a silver-catalyzed ring expansion to dihydrofurans, which then undergo a gold-catalyzed cyclization to form benzo-fused dihydrofurans.