AbstractA rhodium‐catalyzed [5+1] cycloaddition via C−H activation/O‐annulation strategy for synthesizing biologically interesting isochromenes is presented. This protocol selectively provides divergently functionalized isochromenes containing spirosuccinimide and maleimide scaffolds according to the maleimides and itaconimides used as the substrates. This methodology exhibits an extensive substrate scope, remarkable functional group tolerance, and high regioselectivity.
摘要 介绍了一种铑催化的[5+1]环加成法,通过 C-H 活化/O-annulation 策略合成具有生物学意义的异色烯。根据用作底物的马来酰亚胺和伊塔康酰亚胺的不同,该方案可选择性地提供含有螺琥珀酰亚胺和马来酰亚胺支架的功能化异色烯。该方法具有广泛的底物范围、显著的官能团耐受性和高区域选择性。