Abstract

In this research, synthesis of (1E)-N'-((Z)-2-amino-1,2-dicyanovinyl)-N-(4-ethoxyphenyl)formamidine from imidate was investigated in the
presence of different catalysts such as sulfonic acid (-SO3H), P-Toluene sulfonic acid (PTSA), aluminium chloride (AlCl3), ceric
ammonium nitrate (CAN), anilinium chloride (C6H5NH3
+Cl-
), Montmorillonite (K10), silica sulfuric acid (SiO2-OSO3H), silica-supported
perchloric acid (HClO4-SiO2). Silica sulfuric acid exhibited high catalytic activity for this reaction and afforded excellent yields within a
lesser time. Other formamidine derivatives were prepared from the reaction of imidate with amines in the presence of silica sulfuric acid
under argon at room temperature.

Key words: formamidine, imidate, sulfonic acid, aluminium chloride, anilinium chloride, silica sulfuric acid.