NOVEL ANTIFUNGAL COMPOUNDS AND PROCESS FOR PRODUCING THE SAME

摘要

Disclosed are novel compounds useful for prevention or control of diseases derived from fungi, a process for producing the same, and novel antifungal agents using the novel compounds. The compounds useful for prevention and treatment of diseases derived from fungi according to the present invention include novel compounds represented by formula (I). The compounds represented by formula (I) have potent antifungal activity against diseases derived from fungi, and do not have phytotoxicity to mammals and agricultural and garden plants, from which diseases should be eliminated, and, even when applied to agricultural and garden plants, have high photostability. wherein R<1> represents isobutyryl, tigloyl, isovaleryl, or 2-methylbutanoyl; R<2> represents a hydrogen atom, an aromatic carboxylic acid residue, or a protective group of amino; and R<3> represents a hydrogen atom, nitro, amino, acylamino, or N,N-dialkylamino, excluding the case where, when R<1> represents isobutyryl, tigloyl, isovaleryl, or 2-methylbutanoyl with R<3> representing a hydrogen atom, R<2> represents a 3-hydroxypicolinic acid residue, 3-hydroxy-4-methoxypicolinic acid residue, or a 3,4-dimethoxypicolinic acid residue.