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.

This review covers palladium-catalyzed typical Mizoroki–Heck cross-coupling reactions of aryl halides with in situ generated alkenes, to form substituted olefins unlike direct cross-coupling of alkenes with aryl halides in Heck olefination.