{"id":10375,"date":"2022-10-20T04:14:44","date_gmt":"2022-10-19T20:14:44","guid":{"rendered":"https:\/\/www.pyrazoles-derivatives.com\/?p=10375"},"modified":"2022-10-20T04:14:44","modified_gmt":"2022-10-19T20:14:44","slug":"shi-xinzhes-team-published-research-in-chemistry-a-european-journal-in-2021-cas-930-36-9","status":"publish","type":"post","link":"https:\/\/www.pyrazoles-derivatives.com\/?p=10375","title":{"rendered":"Shi, Xinzhe’s team published research in Chemistry – A European Journal in 2021 | CAS: 930-36-9"},"content":{"rendered":"

Quality Control of 1-Methylpyrazole<\/a>On March 25, 2021, Shi, Xinzhe; Sosa Carrizo, E. Daiann; Cordier, Marie; Roger, Julien; Pirio, Nadine; Hierso, Jean-Cyrille; Fleurat-Lessard, Paul; Soule, Jean-Francois; Doucet, Henri published an article in Chemistry – A European Journal. The article was \u300aC-H Bond Arylation of Pyrazoles at the \u03b2-Position: General Conditions and Computational Elucidation for a High Regioselectivity\u300b. The article mentions the following:<\/p>\n

Direct arylation of most five-membered ring heterocycles are generally easily accessible and strongly favored at the \u03b1-position using classical palladium-catalysis. Conversely, regioselective functionalization of such heterocycles at the concurrent \u03b2-position remains currently very challenging. Herein, authors report general conditions for regioselective direct arylation at the \u03b2-position of pyrazoles, while C-H \u03b1-position is free. By using aryl bromides as the aryl source and a judicious choice of solvent, the arylation reaction of variously N-substituted pyrazoles simply proceeds via \u03b2-C-H bond functionalization. The \u03b2-regioselectivity is promoted by a ligand-free palladium catalyst and a simple base without oxidant or further additive, and tolerates a variety of substituents on the bromoarene. DFT calculations revealed that a protic solvent such as 2-ethoxyethan-1-ol significantly enhances the acidity of the proton at \u03b2-position of the pyrazoles and thus favors this direct \u03b2-C-H bond arylation. This selective pyrazoles \u03b2-C-H bond arylation was successfully applied for the straightforward building of \u03c0-extended poly(hetero)aromatic structures via further Pd-catalyzed combined \u03b1-C-H intermol. and intramol. C-H bond arylation in an overall highly atom-economical process. The results came from multiple reactions, including the reaction of 1-Methylpyrazole(cas: 930-36-9Quality Control of 1-Methylpyrazole<\/a>)<\/p>\n

1-Methylpyrazole(cas: 930-36-9) belongs to pyrazoles. Pyrazoles and their related multiring analogs are common elements of a wide variety of bioactive compounds. These ring structures are rare in nature. A consequence of this is that they have previously been thought to be poor moieties to include in potential new drugs. Quality Control of 1-Methylpyrazole<\/a><\/p>\n

Referemce:
Pyrazole – Wikipedia<\/a>,
Pyrazoles – an overview | ScienceDirect Topics<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

1-Methylpyrazole(cas: 930-36-9) belongs to pyrazoles. Pyrazoles and their related multiring analogs are common elements of a wide variety of bioactive compounds. These ring structures are rare in nature. A consequence of this is that they have previously been thought to be poor moieties to include in potential new drugs. Quality Control of 1-Methylpyrazole<\/a><\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[245,131],"tags":[743],"class_list":["post-10375","post","type-post","status-publish","format-standard","hentry","category-930-36-9","category-pyrazoles-derivatives","tag-0-100"],"yoast_head":"\nShi, Xinzhe's team published research in Chemistry - A European Journal in 2021 | CAS: 930-36-9 | pyrazoles-derivatives<\/title>\n<meta name=\"description\" content=\"Quality Control of 1-MethylpyrazoleOn March 25, 2021, Shi, Xinzhe; Sosa Carrizo, E. Daiann; Cordier, Marie; Roger, Julien; Pirio, Nadine; Hierso, Jean-Cyrille; Fleurat-Lessard, Paul; Soule, Jean-Francois; Doucet, Henri published an article in Chemistry - A European Journal. The article was \u300aC-H Bond Arylation of Pyrazoles at the \u03b2-Position: General Conditions and Computational Elucidation for a High Regioselectivity\u300b. The article mentions the following:\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.pyrazoles-derivatives.com\/?p=10375\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Shi, Xinzhe's team published research in Chemistry - A European Journal in 2021 | CAS: 930-36-9 | pyrazoles-derivatives\" \/>\n<meta property=\"og:description\" content=\"Quality Control of 1-MethylpyrazoleOn March 25, 2021, Shi, Xinzhe; Sosa Carrizo, E. Daiann; Cordier, Marie; Roger, Julien; Pirio, Nadine; Hierso, Jean-Cyrille; Fleurat-Lessard, Paul; Soule, Jean-Francois; Doucet, Henri published an article in Chemistry - A European Journal. The article was \u300aC-H Bond Arylation of Pyrazoles at the \u03b2-Position: General Conditions and Computational Elucidation for a High Regioselectivity\u300b. 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Daiann; Cordier, Marie; Roger, Julien; Pirio, Nadine; Hierso, Jean-Cyrille; Fleurat-Lessard, Paul; Soule, Jean-Francois; Doucet, Henri published an article in Chemistry - A European Journal. The article was \u300aC-H Bond Arylation of Pyrazoles at the \u03b2-Position: General Conditions and Computational Elucidation for a High Regioselectivity\u300b. 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