Used as an organozinc reagent in cross-coupling reactions, particularly in Negishi coupling, to form carbon-carbon bonds between pyridyl groups and aryl or vinyl halides. Its main application is in the synthesis of complex organic molecules, especially in pharmaceuticals and agrochemicals, where the pyridine ring is a common structural motif. It offers good functional group tolerance and moderate reactivity, making it suitable for late-stage functionalization in multi-step syntheses. Often employed in air- and moisture-sensitive reactions, requiring inert handling techniques.