FIELD: chemistry.
SUBSTANCE: catalytic interaction of ethyl-2-diazo-3-oxobutyrate with 1.3-dioxolanes or 1.3-dioxanes in the presence of copper triflate (II) Cu(OTf)2 at a temperature of 80°C for 4 hours. The reaction of ethyl 2-diazo-3-oxobutyrate with 1.3-dioxolane is carried out at the following component ratio, wt %: 1.3-dioxolane 1.5-2.3; copper triflate 0.047; ethyl-2-diazo-3-oxobutyrate 1.029-1.057; benzene 96.6-97.4. The reaction of ethyl 2-diazo-3-oxobutyrate with 1.3-dioxane is carried out at the following component ratio, wt %: 1.3-dioxane 1.7-2.5; copper triflate 0.047; ethyl-2-diazo-3-oxobutyrate 1.027-1.035; benzene 96.4-97.2.
EFFECT: increasing the target product yield.
3 cl, 1 tbl
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