A silver Lewis acid catalyzes dearomative [2π+2σ] cycloadditions of N-unprotected indoles and bicyclobutanes to afford indoline fused bicyclo[2.1.1]hexanes (BCHs) bearing up to four contiguous quaternary carbon centers in high yields and with an opposite regioselectivity compared to the classical pathway.
银路易斯酸催化N-未保护的
吲哚和双
环丁烷的脱芳香[2π+2σ]环加成反应,得到二氢
吲哚稠合
双环[2.1.1]己烷(BCH),其具有高达四个连续季碳中心的高产率和相反的区域选择性。走向经典之路。