Copper‐Catalyzed Cascade Reaction of 4‐Iodopyrazole Derivatives with Amidines for the Synthesis of Pyrazolo[4,3‐<i>d</i>]pyrimidine Derivatives

Abstract

Abstract An efficient copper‐catalyzed cascade reaction of 4‐iodopyrazolecarbaldehydes and 4‐iodopyrazolecarboxamides with substituted amidines for the preparation of substituted pyrazolo[4,3‐ d ]pyrimidines and pyrazolo[4,3‐ d ]pyrimidin‐7(6 H )‐ones, respectively, is described.