NOVEL FLUORESCENT COMPOUNDS Russian patent published in 2016 - IPC C07D413/12 C07D265/22 C09D11/00 

FIELD: chemistry.

SUBSTANCE: invention relates to a fluorescent compound of formula

in which R¹ and R^1′ independently are hydrogen or C₁-C₈alkoxy, R² and R^2′ independently of one another are hydrogen or C₁-C₈alkyl, R³ and R^3′ independently of one another are hydrogen or C₁-C₈alkyl, R⁴ and R^4′ independently are hydrogen or C₁-C₈alkoxy, or two R¹ and R², R^1′ and R^2′, R³ and R⁴ and/or R^3′ and R^4′ together form a group of . Invention also relates to use of compounds for printing with counterfeit protection, to use in printing ink composition, to a composition of printing ink, to A protected document and a method of producing said compound.

EFFECT: technical result is obtaining a novel fluorescent compound possessing high resistance to chemicals and solvents, which can be used as fluorescent pigments in process of printing with counterfeit protection.

12 cl, 2 tbl, 4 ex