A simple and efficient method for the allylation of heteroarenes catalyzed by PdCl2
作者:Feng-Quan Yuan、Feng-Yi Sun、Fu-She Han
DOI:10.1016/j.tet.2012.06.038
日期:2012.8
produced was non-toxic acetic acid. Thus, the method presented in this work provides a general, clean, and operationally simple approach for the functionalization of heteroarenes. Finally, a preliminary mechanistic study suggested that the Pd(II) may be reduced in situ by the heteroarenes to Pd(0), which serves as the active metal center to catalyze the following allylations of heteroarenes via a Tsuji–Trost
提出了杂芳烃的PdCl 2催化的烯丙基化。在仅2 mol%PdCl 2的存在下,无需使用碱/酸,添加剂和外部支持配体,即可将各种杂芳烃(包括O-,N-和S-基杂芳烃)与多种烯丙基乙酸酯有效地烯丙基化。另外,仅在CH 2 Cl 2中搅拌两种反应物和催化剂,即可在温和且简单的条件下进行反应。在60°C下。此外,产生的副产物是无毒的乙酸。因此,这项工作中提出的方法为杂芳烃的功能化提供了一种通用,清洁和操作简单的方法。最后,一项初步的机理研究表明,杂芳烃可将Pd(II)原位还原为Pd(0),Pd(0)可作为活性金属中心,通过Tsuji-Trost途径催化以下杂芳烃的烯丙基化。