FIELD: organic chemistry, heterocyclic compounds. SUBSTANCE: products: derivatives of nitrogen-containing heterocyclic compounds of the formula (I) 
at definite radical values and at value Het of the formulas (II) 
, (III) 
and (IV) 
. Synthesized compounds were used in chemical-pharmaceutical industry as cardiostimulating agents. EFFECT: improved method of synthesis. 3 tbl
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