FIELD: organic chemistry. SUBSTANCE: method involves the synthesis of new heterocyclic nitrogen-containing compounds of the formula (I) where radicals R1-R4 have different meanings; X - CH2 , or their pharmaceutically acceptable salts. Reagent 1: compound of the formula (II) where R - H. Reagent 2: R2-Y. Synthesized compounds are used in medicine. EFFECT: improved method of synthesis of compounds indicated above. 1 tbl
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