Gryko, Daniel T. published the artcileFluorescent dyes with 2-amino-4,7-diazaindole skeleton: synthesis and spectroscopy, Computed Properties of 25983-14-6, the main research area is fluorescence dye amino diazaindole skeleton synthesis spectroscopy nucleophilic substitution; Stokes shift quantum yield.
The reaction of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) with compounds possessing two vicinal chlorine atoms activated toward nucleophilic substitution has been studied. All derivatives bearing a 2,3-dichloropyrazine moiety react with DBU leading to fluorescent dyes. Among others, only 2,3-dichloro-1,4-naphthoquinone reacts giving the expected pentacyclic product albeit in a very low yield and accompanied by the product of hydrolysis. Spectroscopic properties of the synthesized compounds were studied. The dye formed from 5,6-dichloro-2,3-dicyanopyrazine exhibits a very high Stokes shift and strong dependence of the fluorescence quantum yield on solvent polarity.
Bulletin of the Chemical Society of Japan published new progress about Crystal structure. 25983-14-6 belongs to class quinoxaline, name is 2,3,6,7-Tetrachloroquinoxaline, and the molecular formula is C8H2Cl4N2, Computed Properties of 25983-14-6.
Referemce:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider