Loucif Seiad, LindaVillemin, D.Bar, N.Hachemi, M.2015-04-232015-04-232012https://dspace.univ-boumerdes.dz/handle/123456789/574Methylpyridinium and methylquinolinium salts were condensed under solvent-free conditions with aromatic aldehydes in the presence of 1,8-diazabicyclo[5.4.]undec-7-ene (DBU) as catalyst, by grinding at room temperature. The products are dyes or useful intermediates. The DBU can be easily recycled and reusedenGreen chemistryKnoevenagel condensationStyryl dyesSolvent-Free condensation of methyl pyridinium and quinolinium salts with aldehydes catalyzed by DBUArticle