80827-24-3

Upstream product

• 94-41-7 benzalacetophenone 
• 615-43-0 2-iodophenylamine 
• 62940-90-3 2-(3-oxo-1,3-diphenylpropyl)malononitrile 
• 4414-88-4 1H-benzimidazol-2-acetonitrile 
• 1484-88-4 2,4,6-triphenylpyrilium perchlorate 

Downstream Products

• 64646-75-9 1,3-Diphenylpyrido<1,2-a>benzimidazole 
• 64674-49-3 5-Methyl-1,3-diphenyl-benzo[4,5]imidazo[1,2-a]pyridin-5-ium; iodide 
• 80827-25-4 1,3-Diphenyl-4-carboxypyrido<1,2-a>benzimidazole 

Relevant academic research and scientific papers

Cu(II)-Promoted Cascade Synthesis of Fused Imidazo-Pyridine-Carbonitriles

A Cu(II)-promoted synthesis of an aza-fused N-heterocycle having a benz-imidazopyridine scaffold is developed via an addition-cyclization reaction followed by an Ullmann-type C-N coupling between o-iodoanilines and γ-ketodinitriles. This protocol features a broad substrate scope, giving products in 32-84% yields. The compounds show excellent photoluminescence properties having two absorption maxima in the region between 270-280 and 338-350 nm and emission maxima in the range of 502-533 nm. The HOMO-LUMO energy gap of 3.49-3.57 eV was determined using Gaussian 09 at the B3LYP/6-31G (d, p) basis set level. We also demonstrated a few postsynthetic modifications.