2,5-Difluoropyridine is the starting material for many drug synthesis, especially important intermediates of many pyridine compounds. For example, 2,5-difluoropyridine can be used to synthesize 8-chloro-1-cyclopropyl-7-fluoro-9-chemicalbook methyl-4-oxo-4-hydroquinazine-3-carboxylate, 8-chloro-1-cyclopropyl-7-fluoro-9-methyl-4-oxo-4-hydroquinazine-3-carboxylate, which is an important intermediate of a class of antibacterial drugs.