4-(Cyclopropylsulfinyl)phenylboronic acid is a boronic acid derivative featuring a cyclopropylsulfinyl substituent, which enhances its utility in cross-coupling reactions such as Suzuki-Miyaura couplings. The cyclopropylsulfinyl group contributes to improved stability and reactivity, making it a valuable intermediate in pharmaceutical and agrochemical synthesis. Its boronic acid moiety facilitates selective bond formation with aryl or vinyl halides, enabling efficient synthesis of complex biaryl structures. The compound is particularly useful in constructing sulfur-containing heterocycles and functionalized aromatic systems. Its well-defined structure ensures consistent performance in catalytic applications, while its moderate solubility in organic solvents allows for versatile reaction conditions. Proper handling under inert atmospheres is recommended to preserve its reactivity.