A Highly Efficient, Practical, and General Route for the Synthesis of (R<sub>3</sub>P)<sub>2</sub>Pd(0): Structural Evidence on the Reduction Mechanism of Pd(II) to Pd(0)
作者:Hongbo Li、Gabriela A. Grasa、Thomas J. Colacot
DOI:10.1021/ol101106z
日期:2010.8.6
A highly efficient, practical, and general method was developed to synthesize a family of (R3P)2Pd(0) complexes, using a stoichiometric amount of phosphine ligands and readily available Pd(II) precursors. The stepwise pathway of reducing Pd(II) to Pd(0) was established by isolating two key intermediates. Both [t-Bu2(4-Me2NC6H4)P]2Pd and (t-Bu2NpP)2Pd are new compounds. Preliminary studies on [t-Bu2(4-Me2NC6H4)P]2Pd
开发了一种高效,实用且通用的方法,使用化学计量的膦配体和易于获得的Pd(II)前体合成(R 3 P)2 Pd(0)配合物家族。通过分离两个关键中间体,建立了将Pd(II)还原为Pd(0)的逐步途径。[ t - Bu 2(4-Me 2 NC 6 H 4)P] 2 Pd和(t- Bu 2 NpP)2 Pd均为新化合物。[ t - Bu 2(4-Me 2 NC 6 H 4)P] 2的初步研究钯已表明,在无铜的Sonogashira偶联中,它是一种非常活泼的催化剂(分离产率为84-95%),其中涉及0.5 mol%催化剂负载量的芳基和杂芳基氯化物。