Operationally Simple and Highly (<i>E</i>)-Styrenyl-Selective Heck Reactions of Electronically Nonbiased Olefins
作者:Erik W. Werner、Matthew S. Sigman
DOI:10.1021/ja203164p
日期:2011.6.29
Simple, mild, and efficient conditions are reported for a Pd(0)-catalyzed Heck reaction that delivers high yields and selectivity for (E)-styrenyl products using electronically nonbiased olefin substrates bearing a range of useful functionality. Preliminary mechanistic studies demonstrate that the σ-donating DMA solvent is crucial for high selectivity. Further studies suggest that the catalyst distinguishes
据报道,Pd(0) 催化的 Heck 反应采用简单、温和且有效的条件,该反应使用带有一系列有用功能的电子无偏烯烃底物,为 (E)-苯乙烯基产物提供高产率和选择性。初步机理研究表明,σ 供体 DMA 溶剂对于高选择性至关重要。进一步的研究表明,与之前报道的 Pd(II) 催化氧化反应条件相比,该催化剂根据它们的相对氢化特性来区分 β-氢。