FIELD: chemistry.
SUBSTANCE: invention relates to a compound having a structure shown in formula Ib-3, or a tautomer shown in formula Ic-3, which can be used in preparing an intermediate compound in the synthesis of bicyclopirone. Invention also relates to a method of producing a compound having a structure shown in formula Ib-3, or a tautomer shown in formula Ic-3, a composition containing said compounds and/or a reaction material prepared by said method, and use thereof in the preparation of bicyclopirone.
EFFECT: use of the disclosed compounds increases output of the intermediate compound in the synthesis of bicyclopirone and reduces the amount of impurity compounds.
5 cl, 20 dwg, 14 ex
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