This review covers some uniqued iazo compounds,t he coupling partners to access various versatilef unctionalized nitrogen heterocycles,s uch as indoles, indolines, isoquinolines,i soquinolones, and so on. Different transition metals (such as Rh, Pd, Ru, Ir, Cu, and Co) are involved in these transformations,w hich involve consecutive processes: transitionm etal-catalyzed cascade C-H activation/ carbenei nsertion/intramolecular annulation.1I ntroduction 2S
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