FIELD: chemistry.
SUBSTANCE: invention relates to an economical method for synthesis of compounds of formula 1: 
by reacting compounds of formulae 2 and 3: 
to obtain a compound of formula 4: 
where: R1, R2, R3 and R4 each independently denotes H, halogen, -CN, -CHO, -CF3, -OCF3, -OH, -NO2, -C1-6-alkyl, -C1-6-alkoxy, -NH2, -NH(C1-6-alkyl), -N(C1-6-alkyl)2, and -NHC(O)-C1-6-alkyl; R5 denotes H,-C(O)O- C1-6-alkyl; and the reaction takes place in the presence of a base, a palladium catalyst and a copper catalyst; with subsequent reaction of the obtained formula 4 compound with copper to obtain a compound of formula 5: 
which reacts with a compound of formula 6: 
to obtain a compound of formula 7: 
and subsequent reaction with the base to remove the ether C1-6alkyl group.
EFFECT: economical method of obtaining the said compounds.
36 cl, 3 dwg, 16 ex
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