Application of 4857-06-1, In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact. 4857-06-1, name is 2-Chloro-1H-benzo[d]imidazole belongs to imidazoles-derivatives compound, it is a common compound, a new synthetic route is introduced below.
Step 1 60% Sodium hydride (1.42 g, 35.4 mmol) was added to mixture of 2-chlorobenzimidazole (5 g, 32.8 mmol) and DMF (50 mL) under ice-cooling, stirred at room temperature for 30 minutes, then added to 4-chlorobenzyl bromide (7.61 g, 37 mmol), and then stirred overnight at room temperature. The reaction mixture was added to saturated chloride ammonium aqueous solution (200 mL), and extracted with ethyl acetate (30 mL*3). The organic phase was washed by 1 mol/L hydrochloride (30 mL), saturated sodium hydrogen carbonate aqueous solution (30 mL), and saturated saline (30 mL), dried over anhydrous magnesium sulfate, and then concentrated in vacuo. The residue was purified by silica-gel column chromatography (ethyl acetate/hexane) to give 1-(4-chlorobenzyl)-2-chlorobenzimidazole (7.45 g, yield: 82%) as pale yellow solid. 1H-NMR (delta ppm TMS/CDCl3): 5.36 (2H, s), 7.11 (2H, d, J=8.2 Hz), 7.20-7.31 (5H, m), 7.72 (1H, d, J=7.8 Hz).
In the field of chemistry, the synthetic routes of compounds are constantly being developed and updated. I will also mention this compound in other articles, 2-Chloro-1H-benzo[d]imidazole, other downstream synthetic routes, hurry up and to see.
Reference:
Patent; Shionogi & Co., Ltd.; KAI, Hiroyuki; TANAKA, Satoru; HIRAMATSU, Yoshiharu; NOZU, Azusa; NAKAMURA, Ken’ichioh; (260 pag.)US2016/24072; (2016); A1;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem