Condensation of Dimethyl 1,3-Acetonedicarboxylate with 1,2-Dicarbonyl Compounds:cis-bicyclo[3.3.0]octane-3,7-diones

Condensation of Dimethyl 1,3-Acetonedicarboxylate with 1,2-Dicarbonyl Compounds: cis-Bicyclo[3.3.0]octane-3,7-diones intermediate: Tetramethyl 3,7-dihydroxybicyclo[3.3.0]octa-2,6-diene-2,4,6,8-tetracarboxylate product: cis-Bicyclo[3.3.0]octane-3,7-dione intermediate: Tetramethyl 3,7-dihydroxy-1,5-dimethylbicyclo[3.3.0]octa-2,6-diene-2,4,6,8-tetracarboxylate product: cis-1,5-Dimethylbicyclo[3.3.0]octane-3,7-dione intermediate: C16H16O10Na2·H2O Keywords: annulation, carbocyclic-[M,N]; annulation, carbocyclic-[M,N]; cyclization, condensation; cyclization, condensation; decarboxylation; decarboxylation; hydrolysis, esters and lactones; hydrolysis, esters and lactones; ethanol