METHOD FOR PREPARING PHENOXY-SUBSTITUTED 2-PYRIDONE COMPOUNDS

摘要

FIELD: organic chemistry, chemical technology, herbicides. ^ SUBSTANCE: invention relates to an improved method for synthesis of phenoxy-substituted 2-pyridone compounds of the formula (2): that can be used as an intermediate substance in synthesis of medicinal or agricultural preparation, in particular, a herbicide compound. Invention proposes a method for synthesis of phenoxy-substituted 2-pyridone compounds of the formula (2) wherein R represents phenyl or radical of the following formula: wherein R1 represents halogen atom or nitro-group; R2 represents hydrogen atom or halogen atom. Method involves interaction of amide compound of the formula (1): wherein R is given above with at least compound chosen from group comprising compounds of formulae (3) (4) (5) and (6) wherein R9 represents alkyl and malondialdehyde in the presence of protonic acid. Invention provides simplifying method based on using more available malondialdehyde or its derivative of formulae (3)-(6) instead ketone. ^ EFFECT: improved method of synthesis. ^ 6 cl, 20 ex