TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (Disclosed): Preparation of the substituted pyridone compound (I) involves: reacting imines compound of formula (i) with phenylpropiolate compound of formula (ii) in presence of solvent such as xylene, toluene or chlorobenzene and acid-catalyst such as para-toluenesulfonic acid or Lewis acid such as trifluoroacetic acid at 20-200 degrees C.R'=lower alkyl (preferably methyl or ethyl. Preferred Definitions:    R1=halo, 1-6C alkyl or 1-6C alkoxy;    R3=F or methoxy;    R4=Cl or F;    n=0 or 1.    The R3 is attached at the para position.    ACTIVITY - Fungicide. The suspension containing 1-(2-chloro-3-5-dimethoxyphenyl)-6-(4-fluorophenyl)-3-methyl-2-(2,4,6-trifluorophenyl)-4-(1H)-pyridinone (test compound) was sprayed to point of run-off on wheat seedlings. The following day seedlings were inoculated with spore suspension of Septoria nodorum (causal agent of wheat glume blotch) and incubated in saturated atmosphere, and then moved to a growth chamber, after which time disease ratings were made. The test compound showed a rating of 100 which indicated 100% disease control.    MECHANISM OF ACTION - None given.    ADMINISTRATION - The compound (I) is applied at a rate of 1-5000 g/hectare or 0.1-10 g per kilogram of seed.    SPECIFIC COMPOUNDS - 708 Compounds are disclosed as the compound (I), e.g. 1-(2-chloro-3-5-dimethoxyphenyl)-6-(4-fluorophenyl)-3-methyl-2-(2,4,6-trifluorophenyl)-4-(1H)-pyridinone (IA); 1-(3,5-dimethoxy-phenyl)-6-(2-fluoro-phenyl)-3-methyl-2-(2,4,6-trifluoro-phenyl)-1H-pyridin-4-one; 6-(2-chloro-phenyl)-1-(3,5-dimethoxy-phenyl)-3-methyl-2-(2,4,6-trifluoro-phenyl)-1H-pyridin-4-one; 6-(4-bromo-phenyl)-1-(3,5-dimethoxy-phenyl)-3-methyl-2-(2,4,6-trifluoro-phenyl)-1H-pyridin-4-one; and 1-(3,5-dimethoxy-phenyl)-6-(3-iodo-phenyl)-3-methyl-2-(2,4,6-trifluoro-phenyl)-1H-pyridin-4-one.    EXAMPLE - A mixture of ethyl 4-fluorophenylpropynoate (2.68 g), 2-chloro-3,5-dimethoxy-N-(1-(2,4,6-trifluorophenyl)propylidene)benzenamine (5 g) and aluminum chloride (2.79 g) in toluene (160 ml) was heated at reflux for 16 hours. After work up, 1-(2-chloro-3-5-dimethoxyphenyl)-6-(4-fluorophenyl)-3-methyl-2-(2,4,6-trifluorophenyl)-4-(1H)-pyridinone (65 mg) was obtained.