Metal catalyzed C–H functionalization on triazole rings Anushka Koranne,a Khushboo Kurrey,a Prashant Kumar,a Sangeeta Gupta,a Vikesh Kumar Jha,b Rangnath Ravi,c Prasanta Kumar Sahu,c Anamikad and Abadh Kishor Jha*a Abstract The present review covers advancement in the area of C–H functionalization on triazole rings, by utilizing various substrates with palladium or copper as catalysts, and resulting in the development of various substituted 1,2,3- and 1,2,4-triazoles.