Tetraphosphine/palladium-catalyzed Suzuki-Miyaura coupling of heteroaryl halides with 3-pyridine- and 3-thiopheneboronic acid: an efficient catalyst for the formation of biheteroaryls
作者:Kun Wang、Qi Fu、Rong Zhou、Xueli Zheng、Haiyan Fu、Hua Chen、Ruixiang Li
DOI:10.1002/aoc.2965
日期:2013.4
tetraphosphine N,N,N′,N′‐tetra(diphenylphosphinomethyl)‐1,2‐ethylenediamine (L1) associated with [Pd(η3‐C3H5)Cl]2 affords an efficient catalyst for Suzuki–Miyaura coupling of 3‐pyridineboronic acid with heteroaryl bromides. Reaction could be performed with as little as 0.02 mol% catalyst and a high turnover number of 2500 is obtained. A wide range of substrates is investigated with satisfactory yields, and good
容易制备的tetraphosphine Ñ,Ñ,Ñ ',Ñ ' -四(二苯基膦基)-1,2-乙二胺(L1)与[钯(η相关的3 -C 3 H ^ 5)CL] 2为3-吡啶硼酸与杂芳基溴化物的Suzuki-Miyaura偶联提供了一种有效的催化剂。可以用低至0.02 mol%的催化剂进行反应,并获得2500的高周转率。以令人满意的产率研究了多种底物,并显示了与氨基取代的吡啶和未保护的吲哚的良好相容性。该方案也可以成功地用于杂芳基溴化物与3-噻吩硼酸的反应。这种Pd-四膦催化剂可有效抑制杂芳基的中毒作用,并显示出良好的稳定性和寿命。版权所有©2013 John Wiley&Sons,Ltd.