FIELD: organic chemistry. SUBSTANCE: invention relates to method of synthesis of substituted indanones of the formula (III) $$$ or their isomers (IIIa) $$$ where $$$ - similar or different and mean hydrogen, $$$-alkyl, $$$-aryl by one-step interaction of compound of the formula (I) $$$ with compound of the formula (II) $$$ where $$$ - as indicated above; $$$ - linear $$$-alkyl. Synthesis is carried out in liquid hydrogen fluoride excess. EFFECT: improved method of synthesis.
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