It has been known that disperse dyes derived from heterocyclic compounds such as phenylindole, pyridone, diamino pyridine, and carbazole exhibit bathochromic shift and high light fastness. The synthetic method to obtain diamino pyridine derivatives, which were used as coupling components, was chlorinating pyridone with phosphorous oxychloride, followed by substitution with various primary amines. Fifteen azo disperse dyes were synthesized by coupling three diamnio pyridines with five diazo components. Structures of these dyes were confirmed by NMR spectroscopy. The wavelengths of maximum absorption of the synthesized disperse dyes were in the range of 450~615 nm. The more electron-withdrawable the substituent in diazo component was, the more bathochromic shift the dye showed. The dye ability of fifteen dyes toward polyester fiber was generally poor probably due to the presence of hydroxyl group in the dye molecule which increased the hydrophilicity and decreased the affinity for polyester. Wash and rubbing fastnesses were excellent, while light and sublimation fastnesses were good.