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Abstract
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In this study, eight new zwitterionic derivatives were synthesized using a simple design method from the
reaction of various 2-substituted 1,3-bis(dimethylamino)-trimethinium salts with malononitrile or ethyl 2-
cyanoacetate in excellent yields in the presence of triethylamine in ethanol at reflux. The molecular
structures of the new compounds were confirmed by IR, UV/vis, mass, 1H, and 13C NMR spectra as well
as by elemental analyses.
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