SYNTHESIS AND FLUORESCENCE BEHAVIOR OF SAME 3-CYANO-4-SUBSTITUTED-6-PYRENYL-2-PYRIDONE DERIVATIVES

A series of 3-cyano-4-substituted-6-pyrenyl-2-pyridone derivatives (7a -7h) was prepared by cyclization of ethyl 2-cyano-3-substituted acryla tes (5a-5h) with 3-acetylpyrene (6) in the presence of ammonium acetat e. Reaction of compounds 7a and 7b with POCl3/PCl5, gave the 2-chloro- 3-cyano-4-substituted-6-pyrenylpyridines (8a and 8b). 1-Methyl-3-cyano -4-phenyl-6-pyrenyl-2-pyridone (9a) was prepared by interaction of com pound 7a and methyl iodide. The structures of the compounds were confi rmed by IR, H-1 NMR, mass spectra and elemental analysis. The fluoresc ence behaviour of compounds 7a-7h was also studied.