FIELD: synthesis biologically active compounds.
SUBSTANCE: invention provides novel substituted arylketones of general formula I: 
(I), in which A1, A2. Q, R1, R2, X, Y, and Z are defined in description. Claimed compounds exhibit biological activity and can be used as defoliants, desiccants, agents destroying leafy tops of root vegetables during preharvest period, or weed-control agents. Intermediates used for synthesis of compounds I are also provided such as: 
(II) or 
(IV).
EFFECT: expanded synthetic possibilities in a novel biologically active compounds area.
12 cl, 4 tbl, 8 ex
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