2233-88-7

Upstream product

• 10273-79-7 9,10-bis-(α-bromo-benzyl)-anthracene 
• 62-53-3 aniline 
• 10303-96-5 9,10-bis(formamido)anthracene 
• 598-30-1 sec.-butyllithium 
• 32347-03-8 N-(2-bromobenzylidene)aniline 
• 594-19-4 tert.-butyl lithium 
• 13460-50-9 metaboric acid 
• 84-65-1 9,10-phenanthrenequinone 
• 34863-09-7 N,N'-diphenylanthroquinonediimine 

Downstream Products

• 103281-00-1 N,N'-bis-(2-methoxy-phenyl)-anthracene-9,10-diyldiamine 
• 115388-35-7 N,N'-bis-(3-chloro-phenyl)-anthracene-9,10-diyldiamine 
• 720669-49-8 N,N'-di-o-tolyl-anthracene-9,10-diyldiamine 

Relevant academic research and scientific papers

Lithium–Bromide Exchange versus Nucleophilic Addition of Schiff's base: Unprecedented Tandem Cyclisation Pathways

By exploring lithium–bromide exchange reactivity of aromatic Schiff's bases with tert-butyllithium (tBuLi), we have revealed unprecedented competitive intermolecular and intramolecular cascade annulation pathways, leading to valuable compounds, such as iso-indolinones and N-substituted anthracene derivatives. A series of reaction parameters were probed, including solvent, stoichiometry, sterics and organolithium reagent choice, in order to understand the influences that limit such ring-closing pathways. With two viable reactivity options for the organolithium on the imine; namely, nucleophilic addition or lithium–bromide exchange, a surprising competitive nature was observed, where nucleophilic addition dominated, even under cryogenic conditions. Considering the most commonly used solvents for lithium–bromide exchange, tetrahydrofuran (THF) and diethyl ether (Et2O), contrasting reactivity outcomes were revealed with nucleophilic addition promoted in THF, while Et2O yielded almost double the conversion of cyclic products than in THF.

Dopant material and organic electroluminescent device using said dopant material

The present invention relates to an organic electroluminescent device consisting of a substrate, an anode, a hole-injecting layer, a hole-transporting layer, at least one light-emitting layer, an electron-transporting layer, an electron-injecting layer and a cathode. Said at least one light-emitting layer contains a compound of formula (1) represented by: wherein R1, R2 and R3 are an alkyl group containing 1 to 4 carbon atoms; a, b and c are integers ranging from 0 to 3.