Bunz, Uwe H. F. published the artcileThe Palladium Way to N-Heteroacenes, Application In Synthesis of 25983-14-6, the main research area is heteroacene preparation palladium catalyst; review heteroacene acene preparation; N-heterocycles; acenes; electron transport materials; homogeneous catalysis; palladium.
A review with new data. Novel synthetic methodologies allow increasingly efficient access to known organic materials, as well as the preparation of otherwise inaccessible species. Pd-catalyzed coupling of aromatic dihalides to ortho-diaminoarenes furnishes embedded stable N,N’-dihydropyrazines expediently and in often excellent yields. The embedded N,N’-dihydropyrazines can then be oxidized by MnO2 to give substituted azatetracenes, azapentacenes, azahexacenes, and azaheptacenes, which are soluble, processable, and stable. This powerful Pd-catalyzed methodol. allows the preparation of azaacenes, including diaza-, tetraaza- and hexaazaacenes. In combination with ahsuitable Pd precursor, Buchwald-type biarylphosphines have been shown to give excellent results. Activated dihalides such as 2,3-dihaloquinoxalines are coupled easily under simplified conditions, whereas 2,3-dibromoacenes require more stringent conditions and advanced catalyst precursors. Pd catalysts effect the assembly of azaacenes with otherwise difficult to obtain substitution patterns. High yields and flexibility make this method most attractive.
Chemistry – A European Journal published new progress about Aryl halides Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation) (aryl dihalides). 25983-14-6 belongs to class quinoxaline, name is 2,3,6,7-Tetrachloroquinoxaline, and the molecular formula is C8H2Cl4N2, Application In Synthesis of 25983-14-6.
Referemce:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider