An Overview of 4‐ and 5‐Halo‐1,2,3‐triazoles from Cycloaddition Reactions

1,2,3-triazoles are important scaffolds in several fields, and there is still a demand to construct these compounds, most notably the disubstituted 4, 5 compounds. The latter obtained different ways, but 4- 5-halo triazoles generally key intermediates their synthesis. These halogenated compounds an extraordinary platform leading great chemical diversity around 4 positions. However, own pathways put aside at expense of substituted triazoles. This review focused on main synthesis 5- 4-halo from cycloaddition followed or not by halogenation reaction. Unlike halogens (iodine, bromine, chlorine), 4-fluoro will be presented separately due relatively more difficult recently challenging