113577-68-7Relevant articles and documents
NITROGENOUS HETEROCYCLIC AROMATIC COMPOUND, PREPARATION METHOD THEREFOR, PHARMACEUTICAL COMPOSITION THEREOF, AND APPLICATION THEREOF
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Paragraph 0090; 0091, (2019/06/12)
Provided are a nitrogenous heterocyclic aromatic compound, a preparation method therefor, a pharmaceutical composition thereof, and an application thereof. The nitrogenous heterocyclic aromatic compound can be used for treating and/or preventing various diseases mediated by ALK5.
Copper-catalyzed fluorination of 2-pyridyl aryl bromides
Mu, Xin,Zhang, Hao,Chen, Pinhong,Liu, Guosheng
, p. 275 - 280 (2014/01/06)
Copper(i)-catalyzed cross-coupling of aryl halides is the subject of extensive interest in synthetic chemistry, but the related catalytic fluorination is unsuccessful. Herein, we have developed a novel copper-catalyzed fluorination of aryl bromides using AgF as the fluorine source. In this transformation a pyridyl directing group is essential for successful catalytic fluorination. A XANES/EXAFS study indicated that the presence of the pyridyl group is essential to stabilize the Cu(i) species and accelerate oxidative addition of the aryl bromide. Further mechanistic studies implicated a Cu(i/iii) catalytic cycle in this Cu(i)-catalyzed fluorination, and final aryl C-F bond formation possibly proceeds through an irreversible reductive elimination of the ArCu(iii)-F species. This rare report of catalytic fluorination by a copper catalyst provides a valuable foundation for further development of Cu(i)-catalyzed fluorination of aryl halides.
The palladium catalysed Suzuki coupling of 2- and 4-chloropyridines
Lohse, Olivier,Thevenin, Philippe,Waldvogel, Erwin
, p. 45 - 48 (2007/10/03)
The Suzuki coupling of 2- and 4-chloropyridines with arylboronic acids is successfully performed under Pd(PPh3)4 catalysis. Moderate to good yields are obtained with 4-chloropyridines while 2-chloropyridines give excellent yields. The corresponding pyridine N-oxides react in the same manner. An easy and cheap access to arylpyridines, a class of compound with medicinal interest, is thus achieved.