Fig. 1

Prior works. a Dirhodium tetraprolinate-catalysed reactions of aryldiazoacetates with toluene and its derivatives. b Photocatalytic C−H functionalization of toluene and derivatives enabled by excited-state iminium ion catalysis

Prior works. a Dirhodium tetraprolinate-catalysed reactions of aryldiazoacetates with toluene and its derivatives. b Photocatalytic C−H functionalization of toluene and derivatives enabled by excited-state iminium ion catalysis