Analyzing the synthesis route of 871836-51-0

At the same time, in my other blogs, there are other synthetic methods of this type of compound,871836-51-0, 4-Chloro-1H-pyrazolo[4,3-c]pyridine, and friends who are interested can also refer to it.

With the rapid development and complex challenges of chemical substances, the synthesis of new drugs is usually one of the most effective ways to increase yield.871836-51-0, name is 4-Chloro-1H-pyrazolo[4,3-c]pyridine, molecular formula is C6H4ClN3, molecular weight is 153.5691, as common compound, the synthetic route is as follows.Formula: C6H4ClN3

To a solution of 4-chloro-1H-pyrazolo[4,3-c]pyridine (3.7 g) in THF (40 mL) was added NaH (1.93 g, 60% purity) at 0C. After stirring for 1 hour, benzyl bromide (3.15 mL) was added, and the mixture was stirred at 15C for 15 hours. The reaction mixture was quenched with water and extracted ethyl acetate. The organic layers were washed with brine, dried over Na2SO4, concentrated, and purified by silica gel chromatography (petroleum ether : ethyl acetate = 50 : 1 to 20 : 1) to give the target compound (3.1 g) as a solid. (2045) [00999] MS: (M+H+): 244.0

At the same time, in my other blogs, there are other synthetic methods of this type of compound,871836-51-0, 4-Chloro-1H-pyrazolo[4,3-c]pyridine, and friends who are interested can also refer to it.

Reference:
Patent; HLA, Timothy; JILISHITZ, Irina; MEINKE, Peter; STAMFORD, Andrew; FOLEY, Michael; SATO, Ayumu; WADA, Yasufimi; FUKASE, Yoshiyuki; KINA, Asato; TAKAHAGI, Hiroki; IGAWA, Hideyuki; POLVINO, William J.; (0 pag.)WO2019/173790; (2019); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem