Synthesis of new fungicidal biphenyl derivatives of 4,5-dichloroisothiazole-3-carboxylic acid

Methods have been developed for the synthesis of new 2,4,4′-substituted biphenyl derivatives containing 4,5-dichloroisothiazole-3-carboxamide and 4,5-dichloroisothiazole-3-carboxylate fragments. The synthesized compounds showed pronounced fungicidal activity.