METHOD OF PREPARING COORDINATION COMPOUNDS OF EUROPIUM(III) WITH 1,10-PHENANTHROLINE AND METHYL ESTERS OF AROYLPYRUVIC ACIDS EXHIBITING FLUORESCENT PROPERTIES Russian patent published in 2023 - IPC C07C49/92 C07C49/203 C07D471/04 C09K11/06 C09K11/77 

FIELD: pharmaceuticals.

SUBSTANCE: invention relates to europium(III) coordination compounds, specifically to a method of preparing complex compounds (1,10-phenanthroline-κN1,κ N10)tris((Z)-4-aryl-1-methoxy-1,4-dioxobut-2-en-2-olate-κO4) europium, which has fluorescent properties in the red region of the spectrum, which can be used in industry for the manufacture of reflective paints, marking samples and securities, in medicine, veterinary medicine and agriculture for diagnostic purposes. The method of obtaining compounds of formula IIa-c is carried out by the interaction of methyl esters of aroylpyruvic acids, phenanthroline and EuCl₃⋅6H₂O in methanol followed by the addition of triethylamine to the reaction mixture:

,

where I, II: Ar = C₆H₄Me-4 (a); Ar = C₆H₄Cl-4 (b); Ar = C₆H₄OMe-4 (c).

EFFECT: provision of a simple method of the synthesis of target products.

1 cl, 4 ex