2-Methylbenzothiazole-5-boronic acid is an organoboron compound featuring a benzothiazole core substituted with a methyl group at the 2-position and a boronic acid group at the 5-position. This structure combines the electron-accepting and charge-transport properties of the benzothiazole heterocycle with the versatile reactivity of the boronic acid functional group. Its primary application is as a key synthetic building block in the field of organic electronics. The boronic acid group enables efficient Suzuki-Miyaura cross-coupling reactions, a cornerstone method for constructing conjugated organic molecules. This makes it a valuable precursor for the synthesis of various advanced materials, including organic light-emitting diodes (OLEDs), organic photovoltaics (OPVs), and organic field-effect transistors (OFETs). The resulting conjugated polymers or small molecules often exhibit desirable electronic and optical properties for optoelectronic devices. As a specialized boronic acid derivative, it is also utilized in medicinal chemistry research for constructing drug-like molecules containing the benzothiazole scaffold. However, its most significant and established use remains in the development of high-performance organic semiconductor materials.