The sources, describing cycloaddition reactions that lead to obtaining of substituted 1,2,4-triazoles and their fused derivatives were reviewed. The review article covers the literature data published in the period 2011-2021.Synthetic particularities of cycloaddition products, the optimization of reaction conditions, factors that influence on the direction of the reaction are reasonably mentioned. Cycloaddition reactions are presented as convenient method for obtaining of as functional 1,2,4-triazoles, as well as their fused derivatives.
CONTENTS1. Introducrion 2. Cycloaddition reactions leading to formation of 1,2,4-triazole derivatives 3. Cycloaddition reactions leading to formation of fused derivatives of 1,2,4-triazole