{"id":4661,"date":"2021-06-10T03:45:23","date_gmt":"2021-06-09T19:45:23","guid":{"rendered":"https:\/\/www.pyrazoles-derivatives.com\/?p=4661"},"modified":"2021-06-10T03:45:23","modified_gmt":"2021-06-09T19:45:23","slug":"brief-introduction-of-5334-40-7","status":"publish","type":"post","link":"https:\/\/www.pyrazoles-derivatives.com\/?p=4661","title":{"rendered":"Brief introduction of 5334-40-7"},"content":{"rendered":"

Electric Literature of 5334-40-7<\/a>, Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 5334-40-7, name is 4-Nitro-1H-pyrazole-3-carboxylic acid, This compound has unique chemical properties. The synthetic route is as follows.<\/p>\n

Step 1: Into a 100 mL round bottom flask containing a solution of methyl 4-nitro-1H-pyrazole- 3-carboxylate (5.0 g, 29 mmol) in dimethylformamide (50 mL) were added anhydrous potassium carbonate (8.0 g, 58 mmol) and 2-iodopropane (5.8 mL, 58 mmol) at 0 oC and the mixture was stirred at room temperature for 16 h. The reaction mixture was filtered through celite and washed with ethyl acetate. The filtrate was washed with water and brine, dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure. The residue was purified flash chromatography eluting with ethyl acetate in petroleum ether (10-20percent) to afford a mixture of regioisomers, methyl 1-isopropyl-4-nitro-1H-pyrazole-5-carboxylate (2.2 g, 35percent yield) as a colorless oil and methyl 1-isopropyl-4-nitro-1H-pyrazole-3-carboxylate as an oil. For methyl 1- isopropyl-4-nitro-1H-pyrazole-5-carboxylate; 1H NMR (CD3OD, 400 MHz): delta 8.16 (s, 1H), 4.75-4.71 (m, 1H), 4.04 (s, 3H), 1.52 (d, J = 6.6 Hz, 6H). For methyl 1-isopropyl-4-nitro-1H- pyrazole-3-carboxylate; 1H NMR (CD3OD, 400 MHz): delta 8.68 (s, 1H), 4.66-4.59 (m, 1H), 3.95 (s, 3H), 1.55 (d, J = 6.7 Hz, 6H).<\/p>\n

The chemical industry reduces the impact on the environment during synthesis 4-Nitro-1H-pyrazole-3-carboxylic acid. I believe this compound will play a more active role in future production and life.<\/p>\n

Reference:
Patent; MERCK SHARP & DOHME CORP.; LIM, Jongwon; ALTMAN, Michael, D.; BRUBAKER, Jason, D.; GIBEAU, Craig, R.; (94 pag.)WO2016\/144847; (2016); A1;<\/a>,
Pyrazole – Wikipedia<\/a>,
Pyrazoles – an overview | ScienceDirect Topics<\/p>\n","protected":false},"excerpt":{"rendered":"

The chemical industry reduces the impact on the environment during synthesis 4-Nitro-1H-pyrazole-3-carboxylic acid. I believe this compound will play a more active role in future production and life.<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[153,131],"tags":[126],"class_list":["post-4661","post","type-post","status-publish","format-standard","hentry","category-5334-40-7","category-pyrazoles-derivatives","tag-m-w100-200"],"yoast_head":"\nBrief introduction of<\/title>\n<meta name=\"description\" content=\"Electric Literature of 5334-40-7, Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 5334-40-7, name is 4-Nitro-1H-pyrazole-3-carboxylic acid, This compound has unique chemical properties. 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