Collect. Czech. Chem. Commun. 1985, 50, 2270-2274

Substituted methylenemalonaldehydes: Condensation of dialdehydes with 1,3-bis(dimethylamino)trimethinium perchlorate

Ludmila A. Yanovskayaa, Galya V. Kryshtala, Dalimil Dvořákb, Vladimír Králb and Zdeněk Arnoldb

a Zelinski Institute of Organic Chemistry, Academy of Sciences of the U.S.S.R., Moscow, U.S.S.R.
b Institute of Organic Chemistry and Biochemistry, Czechoslovak Academy of Sciences, 166 10 Prague 6, Czechoslovakia


Selected unsaturated, aromatic, and heterocyclic dialdehydes reacted with 1,3-bis(dimethylamino)trimethinium perchlorate in acetic anhydride in the presence of acid. One of the aldehyde group participated in the condensation, whereas the other was transformed into the diacetate. The obtained substituted methylenemalonaldehydes were characterized by their 1H NMR, IR, and mass spectra.