{"id":6412,"date":"2021-09-18T05:53:13","date_gmt":"2021-09-17T21:53:13","guid":{"rendered":"https:\/\/www.pyrazoles-derivatives.com\/?p=6412"},"modified":"2021-09-18T05:53:13","modified_gmt":"2021-09-17T21:53:13","slug":"sep-21-news-extended-knowledge-of-15802-80-9","status":"publish","type":"post","link":"https:\/\/www.pyrazoles-derivatives.com\/?p=6412","title":{"rendered":"Sep-21 News Extended knowledge of 15802-80-9"},"content":{"rendered":"

Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps, and cheap raw materials. 15802-80-9, name is 3-(tert-Butyl)pyrazole, A new synthetic method of this compound is introduced below., Product Details of 15802-80-9<\/a><\/p>\n

Sodium hydride (60% suspension in oil, 0.12 g, 3.0 mmol) was washed with hexane, dried under nitrogen and resuspended in dry dimethylformamide (10 mL). 3-tert-butylpyrazole (0.20 g, 1.6 mmol) was added in one portion at ambient temperature, and the stirring was continued until the gas evolution subsided. The (5,11-dihydro-pyrido [2,3-b] [1,5] benzodiazepin-6-yl)- [4-fluoro-2-trifluoromethylphenyl]-methanone of Example 4, Step B (0.50 g, 1.3 mmol) was added in one portion to the clear solution. The mixture was placed in an oil bath (preheated at 130C) for 30 minutes and then heated at reflux for 5 hours. After cooling, the mixture was partitioned between water and ethyl acetate. The organic extracts were dried over sodium sulfate and evaporated to dryness. The crude residue was dissolved in dichloromethane and absorbed onto a silica Merck-60 flash column. Elution with 25% ethyl acetate in hexane provided the title product (0.23 g, 36.0%) as a foam which crystallized by trituration with hexane-ether, m.p. 136-140C. NMR (DMSO-d6, 400 MHz): delta 1.26 (s, 9H, C(CH3)3), 4.17 and 5.45 (dd, 2H, CONCH2), 6.47 (m, 1H, pyrazole CH), 6.54 (m, 1H), 6.68 (m, 1H), 6.80 (m, 1H), 7.00 (m, 1H), 7.28 (m, 1H), 7.60 (m, 1H), 7.87 (m, 1H), 8.04 (m, 1H), 8.13 (m, 1H), 8.47 (m, 1H, pyrazole CH), 9.62 (s, 1H, NH) MS (EI, m\/z): 491 [M]+ Anal. Calc’d for C27H24F3N5O: C 65.98, H 4.92, N 14.25. Found: C 65.75, H 4.92, N 13.95<\/p>\n

The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.<\/p>\n

Reference:
Patent; Wyeth; EP1000059; (2004); B1;<\/a>,
Pyrazole – Wikipedia<\/a>,
Pyrazoles – an overview | ScienceDirect Topics<\/p>\n","protected":false},"excerpt":{"rendered":"

The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[398,131],"tags":[126],"class_list":["post-6412","post","type-post","status-publish","format-standard","hentry","category-15802-80-9","category-pyrazoles-derivatives","tag-m-w100-200"],"yoast_head":"\nExtended knowledge of<\/title>\n<meta name=\"description\" content=\"Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. 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