Synthesis of aromatic polyamidines in Eaton’s reagent

Abstract

Aromatic polyamidines are prepared via the polycondensation of dicarboxamides and diamines in Eaton's reagent. The polymers are investigated by elemental analysis and IR and NMR spectroscopy. Polya midines are well soluble in concentrated sulfuric acid and concentrated formic acid and in polar organic sol vents, and temperatures corresponding to their 10% weight losses are in the range 245-280°C.

Achievements in polycondensation and condensation polymers

“…In addition to the mentioned traditional condensa tion polymers, there is scarce information about the synthesis and properties of other types of polymers that have rapidly developed in recent years [301][302][303][304][305][306][307][308][309][310][311][312][313][314]: poly(arylene ether sulfide sulfones), polyphenylquin olines, polyphenylquinones, polybenzotriazoleim ides, polyamidines, poly[bis(itaconimides)], and poly(arylene)thiophenones. …”

Eaton’s Reagent Catalyzed Synthesis, Invitro α-Amylase Inhibitory Activity and Molecular Docking Study of some Schiff’s Bases as Diabetic-II Inhibitors

“…Philip Eaton firstly synthesized it in 1973. Eaton's reagent has been used for the synthesis of phenanthrolines, 20 tetrahydroisoquinoline-2ones, 21 quinolones, 22 3,4-dihydropyrimidin-2(1H)-ones, 23 polyamidines 24 and chalcones. 25 Thus, considering the widespread applications, biological significance of Schiff's bases in various fields and in continuation of our successful attempts in the development of bioactive heterocyclic compounds, [26][27] in the present article we report the synthesis of some Schiff's bases from p-tolyl sulphonyl hydrazide and various aldehydes using Eaton's reagent under solvent-free conditions (Scheme 1).…”