[Synthesis of  -pyridone derivatives with pyridinium ylide].
D055598:Chemical Phenomena; D002621:Chemistry; D007211:Indoles; D007259:Infrared Rays; D011726:Pyridinium Compounds; D011728:Pyridones / Q000138:chemical synthesis*; D013057:Spectrum Analysis; D014466:Ultraviolet Rays
D007211:Indoles; D011726:Pyridinium Compounds; D011728:Pyridones