64992-08-1Relevant academic research and scientific papers
Cross-conjugated Cyanines and Meriocyanines, Obtained from Salts of 1-Substituted 2,3-Dimethylquinoxalines. On the Isolation of the Dye Bases Formed upon a Spontaneous Reaction on upon Oxidation of the Reactants with Copper(II) Acetate or Silver Oxide
Schelz, Dieter
, p. 2665 - 2680 (2007/10/02)
Quaternary salts of 2,3-dimethylquinoxalines 1-in some cases in the presence of the methylidene bases 2-yield, on dissolving in dimethyl sulfoxide or dimethylformamide, the dye bases 3 in a spontaneous reaction.Higher yields of 3 are obtained by oxidation of 1, 2 or 1/2 with copper(II) acetate or silver oxide.VIS. and 1H-NMR. spectra of the dyes are given.Their structural relationship to Huenig's two-step-redox systems is discussed.
