TAUTOMERISM OF 2-AMINOPERIMIDINES

2-Aminoperimidine and substituted 2-aminoperimidines were synthesized, and their amine-imine tautomerism was studied by IR and UV spectroscopy. It is shown that 2-aminoperimidine exists in virtually only the amine form, whereas its acyl derivatives exist largely in the imine form. A complete shift of the tautomeric equilibrium is observed for the chloroacyl derivatives, which exist in the imide form in both the solid state and in solution.