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2,2-DIMETHYL-5-(5-R-2-FURFURYLIDENE)-1,3-DIOXAN-4,6-DIONES. 1. SYNTHESIS, PROPERTIES, AND STRUCTURE
Krapivin, G. D.,Kul'nevich, V. G.,Val'ter, N. I.
, p. 1072 - 1075 (1986)
5-R-Furanaldehydes react with Meldrum's acid under Knoevenagel reaction conditions.The reaction products have s-cis conformation.The pKa values of the electroneutral Lewis acids synthesized were determined.
