23085-25-8

Upstream product

• 70-11-1 α-bromoacetophenone 
• 1228647-51-5 1-(2-oxo-2-phenylethyl)benzimidazole-2-sulfonic acid 
• 40828-54-4 1H-benzimidazole-2-sulfonic acid 
• 29540-87-2 1,2-diaminobenzimidazole 
• 133638-48-9 1-(p-nitrobenzylidene)amino-3-phenacylbenzimidazolin-2-imine 
• 133638-37-6 1-amino-3-phenacylbenzimidazolin-2-imine 
• 133638-43-4 9-amino-2-phenylimidazo<1,2-a>benzimidazole 
• 133638-50-3 9-(p-nitrobenzylidene)amino-2-phenylimidazo<1,2-a>benzimidazole 

Relevant academic research and scientific papers

MATERIALS FOR ORGANIC ELECTROLUMINESCENT DEVICES

The present invention relates to compounds of the formula (1 ) which are suitable for use in electronic devices, in particular organic electroluminescent devices, and to electronic devices which comprise these compounds.

1-Acylmethylbenzimidazole-2-sulfonic acids and their cyclization by N-nucleophiles

New preparation method was developed for derivatives of 1,4-dihydro-1,2,4-triazino[4,3-a]-, 2-aryl-1(9)H-, and 1-R-imidazo[1,2-a] benzimidazole underlain by newly synthesized 1-acylmethylbenzimidazole-2- sulfonic acids. The latter react with 2-aminoethanol affording along with the previously described compounds of the 1-(2-hydroxyethyl)imidazobenzimidazole series also compounds of formerly unknown polycyclic system, 2,3,11,12-tetrahydro-1,3-oxazolo[2,3-a]imidazo[1,2-a]benzimidazole.

SYNTHESIS AND DEAMINATION OF 9-AMINOIMIDAZOBENZIMIDAZOLES

The reaction between 1,2-diaminobenzimidazole and α-halocarbonyl compounds has given some novel 9-aminoimidazobenzimidazoles.On treatment with nitrous acid or potassium hydroxide in DMSO, these compounds give, in addition to the deaminated compound