FIELD: chemistry.
SUBSTANCE: invention relates to a method of producing endo-3,3a,4,4a,5,5a,6,6a-octahydro-1,3-dioxo-4,6-ethenocycloprop[f]-furan. Method involves reaction of maleic anhydride and cycloheptatriene in molar ratio of 1:1 in the absence of a solvent at temperature of 60-95 °C for 3-6 hours, followed by controlled crystallisation while cooling in the presence of a cosolvent.
EFFECT: higher efficiency of synthesis of endo-3,3a,4,4a,5,5a,6,6a-octahydro-1,3-dioxo-4,6-ethenocycloprop[f]-furan.
4 cl, 3 dwg, 3 ex
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