{"id":3827,"date":"2021-05-06T04:36:13","date_gmt":"2021-05-05T20:36:13","guid":{"rendered":"https:\/\/www.pyrazoles-derivatives.com\/?p=3827"},"modified":"2021-05-06T04:36:13","modified_gmt":"2021-05-05T20:36:13","slug":"the-origin-of-a-common-compound-about-3-difluoromethyl-1-methyl-1h-pyrazole-4-carboxylic-acid","status":"publish","type":"post","link":"https:\/\/www.pyrazoles-derivatives.com\/?p=3827","title":{"rendered":"The origin of a common compound about 3-(Difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylic acid"},"content":{"rendered":"

Adding a certain compound to certain chemical reactions, such as: 176969-34-9, name is 3-(Difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylic acid, belongs to pyrazoles-derivatives compound, can increase the reaction rate and produce products with better performance than those obtained under traditional synthetic methods. Here is a downstream synthesis route of the compound 176969-34-9, COA of Formula: C6H6F2N2O2<\/a><\/p>\n

To 176 mg of 3-difluoromethyl-1-methyl-1 H-pyrazole-4-carboxylic acid in 1 ml of dichloromethane, 10 mg of N,N-dimethylformamide and 381 mg of oxalyl chloride were added, and the mixture was stirred at room temperature for 1 hour. After completion of the reaction, the solvent was evaporated under reduced pressure, and the resulting residue was dissolved in 2 ml of dichloromethane, and to the solution, 190 mg of the 2-amino-1-(3,5-dichloropyridin-2-yl)ethanone-O-ethyloxime prepared in Step 5 in Synthetic Example 2 in 2 ml of dichloromethane and then 91 mg of pyridine were added dropwise with stirring under cooling with ice, and after the addition, the mixture was stirred at room temperature for another 2 hours. After completion of the reaction, the reaction mixture was mixed with 10 ml of water and extracted with chloroform (20 ml*1), the resulting organic layer was washed with water (10 ml*1) and dried over saturated aqueous sodium chloride and then anhydrous sodium sulfate, and the solvent was evaporated under reduced pressure. The resulting residue was purified by silica gel column chromatography using ethyl acetate-hexane (with a gradient of from 1:4 to 1:1) as the eluent to obtain 165.3 mg of a pale yellow resinous substance. The resinous substance was dissolved in 5 ml of acetic acid and stirred at 70C for 2 hours, the solvent was evaporated under reduced pressure, and the resulting residue was purified by silica gel column chromatography using ethyl acetate-hexane (with a gradient of from 1:4 to 1:1) as the eluent to obtain 130.6 mg of the desired product as a colorless resinous substance (E\/Z=1\/1). 1H NMR (CDCl3, Me4Si, 300MHz) delta8.50 and 8.47 (d, J=2.1 Hz, 1 H), 7.90 and 7.86 (s, 1H), 7.76 and 7.75 (d, J=2.1Hz, 1H), 6.9-7.1 (m, 1H), 6.84 and 6.73 (t, J=54.3Hz, 1H), 4.71 and 4.49 (d, J=6.0Hz, 2H), 4.31 and 4.14 (q, J=7.2Hz, 2H), 3.92 and 3.89 (s, 3H), 1.36 and 1.23 (t, J=7.2Hz, 3H).<\/p>\n

If you are interested in these compounds, you can also browse my other articles.Thank you for taking the time to read this article. I hope you enjoyed it.<\/p>\n","protected":false},"excerpt":{"rendered":"

If you are interested in these compounds, you can also browse my other articles.Thank you for taking the time to read this article. I hope you enjoyed it.<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[173,131],"tags":[126],"class_list":["post-3827","post","type-post","status-publish","format-standard","hentry","category-176969-34-9","category-pyrazoles-derivatives","tag-m-w100-200"],"yoast_head":"\nThe origin of a common compound about 3-(Difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylic acid<\/title>\n<meta name=\"description\" content=\"Adding a certain compound to certain chemical reactions, such as: 176969-34-9, name is 3-(Difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylic acid, belongs to pyrazoles-derivatives compound, can increase the reaction rate and produce products with better performance than those obtained under traditional synthetic methods. 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