تحضير منتجات جديدة و توصيفها بتكاثف كنوفيناغل لإيزوفتال ألدهيد و ترفتال ألدهيد مع بعض المركبات المتيلنية الفعالة

الملخص EN

six new products using Knoevenagel condensation of isophthalaldehyde and terephthalaldehyde have been prepared with the following active methylene compounds: malononitrile, methyl cyano acetate, ethyl cyano acetate, dimethyl malonate and diethyl malonate.

We determined the optimum conditions of the reaction by studying the effect of solvent and catalyst nature and reaction conditions on the condensation.

The products were purified by recrystallization from ethanol.

The structures of the obtained compounds were established by IR, U.V, 1H- NMR, 13C –NMR -spectroscopies and elemental analysis.