Well-Defined Air-Stable Palladium HASPO Complexes for Efficient Kumada-Corriu Cross-Couplings of (Hetero)Aryl or Alkenyl Tosylates
作者:Lutz Ackermann、Anant R. Kapdi、Sabine Fenner、Christoph Kornhaaß、Carola Schulzke
DOI:10.1002/chem.201002386
日期:2011.3.1
Palladium complexes of representative heteroatom‐substituted secondary phosphine oxide (HASPO) preligands were synthesized and fully characterized, including X‐ray crystal structure analysis. Importantly, these well‐defined complexes served as highly efficientcatalysts for Kumada–Corriu cross‐couplingreactions of aryl, alkenyl, and even heteroaryl tosylates. Particularly, an air‐stable catalyst derived
代表的钯络合物ħ etero一汤姆取代小号econdary p hosphine ø西德(HASPO)preligands合成并充分表征,包括X射线晶体结构分析。重要的是,这些定义明确的络合物可作为Kumada-Corriu芳基,烯基乃至杂芳基甲苯磺酸酯交叉偶联反应的高效催化剂。特别是,由廉价的PinP(O)H衍生的空气稳定型催化剂显示出极高的催化效力,这导致在极低的反应条件下,在足够宽泛的反应条件下,低催化剂负载下的交叉偶联。
Palladium-Catalyzed Aryl−Aryl Cross-Coupling Reaction Using <i>ortho</i>-Substituted Arylindium Reagents<sup>†</sup>
作者:Miguel A. Pena、José Pérez Sestelo、Luis A. Sarandeses
DOI:10.1021/jo062148s
日期:2007.2.1
A range of biaryl compounds (aryl−aryl, aryl−heteroaryl, and heteroaryl−heteroaryl) can be efficiently prepared by a palladium-catalyzed cross-coupling reaction between ortho-substituted triarylindium reagents and aryl halides. The triarylindium reagents are prepared by directed ortho-lithiation and transmetallation to indium from the corresponding benzene derivatives using various directed metallation