Some common heterocyclic compound, 2849-93-6, name is 1H-Benzimidazole-2-carboxylic acid, molecular formula is C8H6N2O2, traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route. 2849-93-6
A mixture of 3-nitro-N-(piperidin-4-yl)pyridin-2-amine hydrochloride (intermediate 58, 580 mg, 2.3 mmol), 1H-benzo[d]imidazole-2-carboxylic acid (365 mg, 2.3 mmol), 1H-benzo[d][1,2,3]triazol-1-ol (365 mg, 2.7 mmol), 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (516 mg, 2.7 mmol) and N-methylmorpholine (455 mg, 4.6 mmol) in dry dimethylformamide (15 mL) was stirred at room temperature overnight. The mixture was diluted with water (60 mL), and extracted with ethyl acetate (2*50 mL). The organic layer was washed with brine, dried over sodium sulfate and concentrated to give the crude compound which was purified by silica chromatography to afford (1H-benzo[d]imidazol-2-yl)(4-((3-nitro-pyridin-2-yl)amino)piperidin-1-yl)methanone (600 mg, 1.64 mmol, 72.8% yield).
These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 2849-93-6, its application will become more common.
Reference:
Patent; AMGEN INC.; Allen, Jennifer R.; Amegadzie, Albert; Andrews, Kristin L.; Brown, James; Chen, Jian J.; Chen, Ning; Harrington, Essa Hu; Liu, Qingyian; Nguyen, Thomas T.; Pickrell, Alexander J.; Qian, Wenyuan; Rumfelt, Shannon; Rzasa, Robert M.; Yuan, Chester Chenguang; Zhong, Wenge; US2013/225552; (2013); A1;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem