FIELD: organic chemistry. SUBSTANCE: product: substituted derivative of bicycloheptanedione of the formula 
where R1 - phenyl substituted with two or three substituents taken from the group involving lower alkyl, lower alkyl-oxy, lower alkylsulfonyl, halogen, nitro, lower alkylthio; R2 - lower alkyl, lower alkylthio, lower alkylsulfonyl and others. Products were used in agriculture as herbicide composition. ???EFFECT: improved method of synthesis. 3 cl, 5 tbl
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