Regioselective C-5(H) annulation of imidazo[1,2-a]pyridine to generate N-centered peri-fused triazabenzoazulenes

N-CenteredPeri-fused Cycles (NCPCs) are rare, with sevenmembered variants particularly scarce and synthetically challenging. Herein, iodonium ylides enable regioselective C-5(H) activation of imidazo[1,2-a]pyridine over the inherently preferred C-2(H) site, furnishing 5,6,7-triazabenzoazulenebased...