PYRAZOLE DERIVATIVES Russian patent published in 1997 - IPC

FIELD: organic chemistry, heterocyclic compounds. SUBSTANCE: product: derivatives of pyrazole of the formula (I): where R - H, C_1-4-alkyl or CF₃; Y - C_1-4-alkyl; A - nitrogen or OH; Z - C_1-6-alkyl, naphthyl or phenyl optionally substituted with 1-2 substituents taken from halogen, C_1-4-alkyl, C_1-4-alkoxy, trifluoromethyl. Reagent 1: α-(1-methyl-4-phenylethynylpyrazole)-β-methoxyacrylate. Reaction conditions: stirring at 25 C in dimethylformamide in the presence of K₂CO₃ and methyl iodide. The synthesized compounds were used for control over phytopathogens. EFFECT: improved method of synthesis. 4 cl, 2 tbl