PYRIDYLPYRIMIDINE DERIVATIVE, ITS PREPARATION AND PLANT DISEASE-CONTROLLING AGENT CONTAINING SAME AS ACTIVE INGREDIENT

摘要

NEW MATERIAL:A pyridylpyrimidine derivative of formula I (R<1>, R<3> are 1-7C straight- or branched-chain alkyl; R<2>, R<4> are H, lower alkyl; R<5> is hydroxyl, halogen). EXAMPLE:4-Hydroxy-6-n-propyl-2-(6-n-propyl-2-pyridyl)pyrimidine. USE:An agent for controlling plant diseases. The agent has preventive, remedial or systemic action against a variety of plant diseases. PREPARATION:The reaction of a picolinamidine derivative of formula II or its salt with a beta-oxocarboxylic acid ester of formula III (R<6> is lower alkyl) is carried out in a solvent in the presence of a base to give the compound of formula I.