2-Methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzoxazole is an organic compound featuring a benzoxazole core substituted with a methyl group at the 2-position and a pinacol boronate ester group at the 5-position. The CAS number is 845872-30-2. The pinacol boronate ester is a protected form of a boronic acid, which is a key functional group in cross-coupling reactions. This compound is primarily utilized as a crucial synthetic building block in materials science, specifically for the preparation of organic electronic materials. The benzoxazole moiety is an electron-deficient heterocycle, making it a valuable component in the design of n-type organic semiconductors, electron-transporting materials (ETMs), and host or emitter materials for organic light-emitting diodes (OLEDs). The boronate ester group enables its participation in Suzuki-Miyaura cross-coupling reactions, a fundamental method for constructing conjugated organic frameworks essential for optoelectronic applications. As a specialized precursor, it is not a commodity chemical but a high-value research and development material. It must be handled under inert atmosphere (e.g., nitrogen or argon) due to the sensitivity of the boronate ester group to moisture and protic conditions. Standard safety precautions for laboratory chemicals should be observed.