Here
we have demonstrated a visible-light-mediated metal-free organic-dye-catalyzed
dehydrogenative N-insertion leading to highly substituted imidazoles
and privileged dihydroisoquinoline-based imidazole derivatives via
C(sp3)–H and C(sp2)–H bond functionalization.
A sustainable, convenient, metal-free azidation/C–H aminative
cyclization approach in the absence of stoichiometric oxidants is
presented. This protocol involves a rare photoinduced iminyl radical
as a key intermediate for the “N” insertion.
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