Collect. Czech. Chem. Commun. 1984, 49, 2602-2612

Synthesis of benzylidenemalonaldehydes

Zdeněk Arnold, Vladimír Král and Dalimil Dvořák

Institute of Organic Chemistry and Biochemistry, Czechoslovak Academy of Sciences, 166 10 Prague 6


A general two-step synthesis of benzylidenemalonaldehydes (V), based on condensation of substituted benzaldehydes with 1,3-bis(dimethylamino)trimethinium perchlorate, is described. The course of this reaction, character of the intermediate and spectral characteristics of the products are discussed. The obtained dialdehydes are classified as new organic Lewis acids.