Biphenyl derivatives are organic compounds that contain two connected benzene rings. These compounds can have various functional groups attached, which influence their chemical properties and applications. They are commonly used in the production of dyes, pesticides, and pharmaceuticals. The presence of different substituents on the biphenyl structure can lead to a wide range of biological activities. For example, some biphenyl derivatives are studied for their potential use in treating diseases or as antimicrobial agents. Their versatility makes them important in both industrial and research settings, particularly in the fields of organic chemistry and medicinal chemistry.