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)
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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 have indicated that it is a very active catalyst (84−95% isolated yield) in the Cu-free Sonogashira coupling involving aryl and heteroaryl chlorides at 0.5 mol % catalyst loading.
创建时间：
2010-08-06
