PYRIDONE DERIVATIVES Russian patent published in 1997 - IPC

FIELD: organic chemistry. SUBSTANCE: products: derivatives of pyridone of the formula (I) $$$ where: E - $$$ or G - $$$-Y; Y - phenyl, 3,4-dimethoxyphenyl, 4-trifluoromethylphenyl or benzo[b]thiene-4-yl, or E and G together form group $$$ or $$$ where: R - H; Y - phenyl, trifluoromethylphenyl, 3,4-dimethoxyphenyl, 3,4-dichlorophenyl or benzo[b]thiene-4-yl; $$$ and $$$ form pyrrolidinyl with nitrogen atom to which they were bound; A - carbocyclic radical or group -CH(B)-$$$ where: B - phenyl or isopropyl. Reagent 1: compound of the formula (II) $$$. Reagent 2: $$$=CH-COO-$$$. Reagent 3: Y-CH(R)-COM where: M - hydroxyl or halogen. Reaction condition: in medium of inert organic solvent. Synthesized compounds were used in medicine as analgetics. EFFECT: improved method of synthesis.