Tomoda, Haruhiko published the artcileSynthesis and physical properties of pyrido[1′,2′:1,2]imidazo[4,5-b]quinoxalines, Product Details of C8H2Cl4N2, the main research area is pyridoimidazoquinoxaline preparation; fluorescence substituent effect pyridoimidazoquinoxaline preparation.
A series of 2-, 3-, or 4-substituted pyrido[1′,2′:1,2]imidazo[4,5-b]quinoxalines (PIQs) were synthesized in moderate-to-good yields by the reactions of 2-amino-3-chloroquinoxalines (ACQs) with substituted pyridines, and the structures were established. The reactions of ACQs with 3-phenoxycarbonyl and 3-benzoylpyridines gave the corresponding 2-substituted PIQs, while those with 3-Me, 3-Et, 3-benzyl, 3-Ph, 3-ethoxycarbonyl, and 3-acetylpyridines gave the corresponding 4-substituted PIQs. PIQ derivatives having substituents at the 2,4,8- and/or 9-positions were also studied. The spectroscopic and electrochem. properties of a series of PIQs derivatives were studied. PIQ showed a strong green fluorescence at 481.5 and 505 nm (F = 0.40) in ethanol. The introduction of substituents at the 3 position of PIQ altered the color of the fluorescence from blue to green without deteriorating the high quantum yield of PIQ. All of the derivatives showed strong (blue to orange) fluorescence in both solution and the solid state.
Bulletin of the Chemical Society of Japan published new progress about Fluorescence. 25983-14-6 belongs to class quinoxaline, name is 2,3,6,7-Tetrachloroquinoxaline, and the molecular formula is C8H2Cl4N2, Product Details of C8H2Cl4N2.
Referemce:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider