Kim, Yong published the artcileCopper-Catalyzed, One-Pot, Three-Component Synthesis of Benzimidazoles by Condensation and C-N Bond Formation, Quality Control of 39856-58-1, the publication is Journal of Organic Chemistry (2011), 76(23), 9577-9583, database is CAplus and MEDLINE.
Benzimidazoles, e.g., I, were synthesized by the copper-catalyzed, one-pot, three-component reaction of 2-haloanilines, aldehydes, and NaN3. The reaction was optimized when 2-iodo- or 2-bromoanilines (1.0 equiv), aldehydes (1.2 equiv), NaN3 (2.0 equiv), 5 mol% of CuCl, and 5 mol % of TMEDA were reacted in DMSO at 120 °C for 12 h. Good yields were obtained and the reaction showed tolerance toward functional groups such as ester, nitro, and chloro. Aliphatic and heteroaromatic aldehydes also afforded the desired products in moderate to good yields.
Journal of Organic Chemistry published new progress about 39856-58-1. 39856-58-1 belongs to pyridine-derivatives, auxiliary class Pyridine,Bromide,Amine, name is 2-Bromopyridin-3-amine, and the molecular formula is C5H5BrN2, Quality Control of 39856-58-1.
Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem