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-catalyzed cyclopropanation 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.
为了快速合成多环苯并稠合的二氢呋喃,开发了三级联反应法。第一步是α-芳基重氮酮与烯烃的铑催化环丙烷化。随后是银催化的扩环反应生成二氢呋喃,然后金催化环化反应形成苯并稠合的二氢呋喃。