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Metal-Free, Visible-Light-Mediated Direct C−H Arylation of Heteroarenes with Aryl Diazonium Salts

Hari, Durga Prasad ; Schroll, Peter ; König, Burkhard


Visible light along with 1 mol % eosin Y catalyzes the direct C-H bond arylation of heteroarenes with aryl diazonium salts by a photoredox process. We have investigated the scope of the reaction for several aryl diazonium salts and heteroarenes. The general and easy procedure provides a transition-metal-free alternative for the formation of aryl-heteroaryl bonds.

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