C-H Bond Functionalization of Arylpyrimidines Catalyzed by an in situ Generated Ruthenium(II) Carboxylate System and the Construction of Tris(heteroaryl)-Substituted Benzenes
作者:Bogdan Štefane、Jan Fabris、Franc Požgan
DOI:10.1002/ejoc.201100238
日期:2011.7
A ruthenium(II) carboxylate catalyst, generated in situ from [RuCl 2 (p-cymene)] 2 and 1-phenyl-1-cyclopentanecarboxylic acid (PCCA) in the presence of K 2 CO 3 , allowed activation of the C―H bond in phenyl-substituted pyrimidines and their direct functionalization with both electron-deficient and electron-rich aryl halides. The scope of this process can be extended to the use of heteroaryl bromides
在 K 2 CO 3 存在下,由 [RuCl 2 (p-cymene)] 2 和 1-苯基-1-环戊烷甲酸 (PCCA) 原位生成的羧酸钌 (II) 催化剂可以活化 C-H苯基取代的嘧啶中的键和它们与缺电子和富电子芳基卤化物的直接官能化。该方法的范围可以扩展到使用杂芳基溴化物和反应性较低的芳基氯化物。与其他羧酸盐相比,这种 Ru II -PCCA 复合物构成了更好的催化体系。
Skeletal Editing of Pyrimidines to Pyrazoles by Formal Carbon Deletion
method for the conversion of pyrimidines into pyrazoles by a formal carbon deletion has been achieved guided by computational analysis. The pyrimidine heterocycle is the most common diazine in FDA-approved drugs, and pyrazoles are the most common diazole. An efficient method to convert pyrimidines into pyrazoles would therefore be valuable by leveraging the chemistries unique to pyrimidines to access diversified
An iron-catalyzed C-C bond formation reaction of a nitrogen-containing aromatic compound with an arylzinc reagent takes place at 0 degrees C in a good to quantitative yield. The reaction involves a C-Hbondactivationdirected by a neighboring nitrogen atom. The important additives in this reaction are 1,10-phenanthroline, tetramethylethylenediamine, and 1,2-dichloro-2-methylpropane, in the absence
含氮芳族化合物与芳基锌试剂的铁催化 CC 键形成反应在 0 摄氏度下以良好的定量产率发生。该反应涉及由相邻氮原子引导的 CH 键活化。该反应中的重要添加剂是 1,10-菲咯啉、四甲基乙二胺和 1,2-二氯-2-甲基丙烷,在没有它们的情况下观察到非常低的产物收率。
Correction to “Skeletal Editing of Pyrimidines to Pyrazoles by Formal Carbon Deletion”
requests via the RightsLink permission system: http://pubs.acs.org/page/copyright/permissions.html. This article has not yet been cited by other publications. The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/jacs.2c13180. Experimental procedures, characterization data, spectra for all new compounds, crystallographicdata and Cartesian coordinates of DFT-optimized