1-Methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-indazole is an indazole derivative bearing a pinacol boronate ester group at the 5-position and a methyl group on the indazole nitrogen. This compound is a protected form of the corresponding boronic acid, which is a key intermediate in Suzuki-Miyaura cross-coupling reactions, a widely used method for forming carbon-carbon bonds. Its primary application is as a versatile building block in medicinal chemistry and pharmaceutical research for the synthesis of complex heterocyclic compounds. The indazole scaffold is a privileged structure found in numerous bioactive molecules and drug candidates targeting various diseases, including cancer and central nervous system disorders. This specific boronic ester is used to introduce the 5-substituted indazole moiety into target molecules during drug discovery and development processes. As a stable, crystalline solid, it offers advantages in handling and storage compared to the more reactive boronic acid. It is commercially available from suppliers specializing in advanced pharmaceutical intermediates and organoboron reagents for synthesis.