Résumé : Abstract The ecto‐5′‐nucleotidase CD73 is involved in the production of immunosuppressive adenosine in the tumoral microenvironment and recently became a validated target in immuno‐oncology. To avoid formation of CD73‐produced adenosine, several series of potential inhibitors of the target enzyme based on a triazole scaffold were synthetized and evaluated on recombinant purified h CD73 and in cell‐based assays.