Engelhart, Jens U. published the artcileSubstituted Tetraaza- and Hexaazahexacenes and their N,N’-Dihydro Derivatives: Synthesis, Properties, and Structures, Related Products of quinoxaline, the main research area is hexaazahexacene preparation optical electronic property; dichloroquinoxaline diaminophenazine coupling palladium catalyst; tetraazahexacene preparation optical electronic property; diaminoanthracene dichloroquinoxaline coupling palladium catalyst; amination; cross-coupling; heteroacenes; oxidation; palladium.
The palladium-catalyzed coupling of a substituted o-diaminoanthracene and a substituted o-diaminophenazine to substituted 2,3-dichloroquinoxalines furnishes 10 differently substituted N,N’-dihydrotetraaza- or -hexaazahexacenes I (X = CH, N; R1 = H, Cl; R2 = H, F, Cl; R3 = H, F, Cl, NO2) with the quinoxaline group of the azaacenes carrying fluorine, chlorine, or nitro groups. The N,N’-dihydrotetraazahexacenes with hydrogen, chlorine, and fluorine substituents were oxidized to azaacenes, whereas only the parent N,N’-dihydrohexaazahexacenes, with hydrogen substituents, were oxidized by MnO2. The resultant azaacenes were characterized by their optical and spectroscopic data. In addition, single-crystal X-ray structures have been obtained for the parent tetraazahexacenes and their difluoro and chloro-substituted derivatives I (X = CH; R1 = H, Cl; R2 = H, F, Cl; R3 = H, F, Cl).
Chemistry – A European Journal published new progress about Coupling reaction. 25983-14-6 belongs to class quinoxaline, name is 2,3,6,7-Tetrachloroquinoxaline, and the molecular formula is C8H2Cl4N2, Related Products of quinoxaline.
Referemce:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider