FIELD: chemistry.
SUBSTANCE: invention relates to organic chemistry and specifically to a method of producing compound 5, a compound of general formula (II) 
, a compound of general formula (IV) 
, where R, in each case independently represents C1-6 alkyl.
EFFECT: technical result is improved method of producing intermediate products for synthesis of analogues of anti-HIV agent kalalolid A and its analogues, as well as obtaining novel heterocyclic compounds.
10 cl, 1 dwg, 3 ex
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