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The first examples of the direct functionalization of non‐activated aryl sp2 C−H bonds with ethyl diazoacetate (N2CHCO2Et) catalyzed by Mn‐ or Fe‐based complexes in a completely selective manner are reported, with no formation of the frequently observed cycloheptatriene derivatives through competing Buchner reaction. The best catalysts are FeII or MnII complexes bearing the tetradentate pytacn ligand...
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