Abstract The reaction of β-hetarylacrolein and β-hetaryl-α-methylacroleins with esters of acetoacetic and malonic acids was studied. The structures of the products obtained were established using 1 H and 13 C NMR and UV spectroscopy.(E) and (Z) isomers of α, α- dicarbonylalkadienes, their mixtures with the corresponding 2H-pyrans or exclusively 2H- pyrans are formed depending on the substitution in the starting aldehyde and the ester ...
