(2-Cyclopropylpyrimidin-5-yl)boronic acid is a heterocyclic boronic acid derivative featuring a pyrimidine ring substituted with a cyclopropyl group at the 2-position and a boronic acid group at the 5-position. It is a white to off-white solid powder with a molecular formula of C7H9BN2O2. This compound is primarily utilized as a key synthetic intermediate in medicinal chemistry and pharmaceutical research. The boronic acid functional group enables its participation in Suzuki-Miyaura cross-coupling reactions, a pivotal method for constructing biaryl and heterobiaryl linkages. This makes it a valuable building block for the synthesis of more complex molecules, particularly those containing the 2-cyclopropylpyrimidine scaffold, which is a privileged structure in drug discovery for various therapeutic targets. As a research chemical, it is handled under standard laboratory safety protocols. It is sensitive to air and moisture, requiring storage under inert conditions to maintain stability. Its main application remains in the discovery and development of novel active pharmaceutical ingredients (APIs).