FIELD: organic chemistry.
SUBSTANCE: invention relates to derivatives of thienyloxazolone formula (III), where R1 and R2 are identical and represent a bromine atom or a chlorine atom; R3 represents a fluorine atom, a chlorine atom, a bromine atom, an iodine atom or methyl. The invention also relates to a process for the preparation of a compound of formula (III) and intermediate compounds of formulas (XXI), (XXIIa), (XXIVa).
EFFECT: protection of plants from bacterial diseases, in particular, those caused by bacteria belonging to Xanthomonas genus.
11 cl, 8 tbl, 7 ex
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