Recent Trend in the Chemistry of Triazolopyrimidines and their Applications

: This review deals with the synthetic methods, chemical reactions, and applications of triazolopyrimidine derivatives. The synthetic methods and chemical reactions are subdivided into groups according to the junction between triazole and pyrimidine moieties for instance [1,2,4]triazolo[1,5-a]pyrimidine, [1,2,4]triazolo[1,5-c]pyrimidine, [1,2,3]triazolo[1,5-a]pyrimidine, [1,2,3]triazolo[1,5-c]pyrimidine, [1,2,4]triazolo[4,3-c]pyrimidine, and [1,2,4]triazolo[4,3-a]pyrimidine. Pharmacological activity of triazolopyrimidins is also reported.