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。