3-Amino-4-(4-BOC-piperazino)phenylboronic acid pinacol ester is a boronic acid derivative featuring a BOC-protected piperazine moiety and a pinacol ester group. This compound is particularly valuable in Suzuki-Miyaura cross-coupling reactions due to its stability and reactivity, enabling efficient formation of carbon-carbon bonds in synthetic organic chemistry. The BOC (tert-butoxycarbonyl) group provides orthogonal protection for the piperazine nitrogen, allowing selective deprotection under mild acidic conditions. The pinacol ester enhances solubility and handling stability, making it suitable for diverse applications in medicinal chemistry and materials science. Its structural versatility facilitates the synthesis of complex molecules, particularly in pharmaceutical intermediates and ligand design.