Interrupted Nazarov Reactions Using Dichlorocyclopropanes: A Novel Mode of Arene Trapping

2-Siloxy-2-alkenyl-1,1-dichlorocyclopropanes with aryl-terminated side chains undergo silver-assisted electrocyclic opening/Nazarov cyclization.
The resulting 2-siloxycyclopentenyl cations are intercepted by the pendant arenes to furnish tricyclic adducts in moderate to good yields. In
cases where the arene trap was tethered through the cyclopropane unit, a new mode of trapping occurred to generate unique bridged carbon
frameworks.

带有芳基封端侧链的2-硅氧基-2-烯基-1,1-二氯环丙烷可发生银辅助电环化开环/纳扎罗夫（Nazarov）环化反应。所生成的2-硅氧基环戊烯基正离子会被悬挂芳环捕获，从而以中等至良好的产率得到三环加合物。当芳环捕获基团通过环丙烷单元相连时，会出现一种新型的捕获模式，进而生成独特的桥联碳骨架。