Recent Advances in Imidazo[5,1‐f][1,2,4]triazin‐4(3H)‐ones Chemistry: An Overview of the Synthetic Routes to Vardenafil and Its Analogues

The biological and medicinal properties of imidazo5,1‐f]1,2,4]triazin‐4(3H)‐ones and its analogues have prompted enormous research aimed at developing synthetic routes to these heterocycles. This review focuses on the chemical properties associated with these systems.