Abstract
Herein, we disclose an efficient ruthenium-catalyzed C-H functionalization of 2-arylbenzimidazoles/2-arylimidazoles with iodonium ylides leading to substituted tetracyclic and pentacyclic bridgehead N-heterocycles, wherein iodonium ylide acts as a carbene precursor. For the first time, iodonium ylide proceeds through a Ru-carbenoid intermediate. Further, the synthetic utility of this protocol was successfully shown for gram-scale synthesis and useful synthetic transformations.
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