Reference of 176969-34-9, 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. 176969-34-9, name is 3-(Difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylic acid belongs to pyrazoles-derivatives compound, it is a common compound, a new synthetic route is introduced below.
In a 50 mL eggplant-shaped bottle, add 3-difluoromethyl-1-methyl-1H-pyrazole-4-carboxylic acid (0.707 g, 4.01 mmol), add dichloromethane (20 mL), and add oxalyl chloride (1.29 g , 9.96mmol), add 1 drop of N, N-dimethylformamide dropwise, stir at reflux at room temperature, you can clearly see that the reaction solution gradually changed from turbid to clear, TLC followed the reaction, and the reaction ended after 1 hour. The solvent was spin-dried to obtain Intermediate 1, which was dissolved again with dichloromethane (10 mL) and set aside.
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, 3-(Difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylic acid, other downstream synthetic routes, hurry up and to see.
Reference:
Patent; East China University of Science and Technology; Shao Xusheng; Li Zhong; Fu Wen; Cheng Jiagao; Xu Xiaoyong; Xu Zhiping; (43 pag.)CN111087345; (2020); A;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics