EvanPhos: a ligand for ppm level Pd-catalyzed Suzuki–Miyaura couplings in either organic solvent or water
作者:Evan B. Landstrom、Sachin Handa、Donald H. Aue、Fabrice Gallou、Bruce H. Lipshutz
DOI:10.1039/c8gc01356j
日期:——
be constructed in only two steps. It complexes Pd(OAc)2 forming a precursor of a very active catalyst useful for Suzuki–Miyaura cross-couplings of functionalized substrates. By a combination of pre-activation, used together with the uncommon solvent EtOAc, the resulting catalyst system is effective at loadings in the ppm (0.1–0.5 mol%) range with highly functionalized reaction partners. Similar reactions
只需两个步骤即可构建一个新的含联芳基膦的平台。它与Pd(OAc)2形成络合物,形成非常活跃的催化剂的前体,可用于功能化基材的Suzuki-Miyaura交叉偶联。通过与不常见的溶剂EtOAc一起使用的预活化的组合,所得到的催化剂体系在具有高官能化反应伙伴的ppm(0.1-0.5 mol%)范围内的装载量方面是有效的。在含有纳米胶束的水中进行的类似反应快或快。衍生的钯络合物预催化剂具有扩展的工作台稳定性。由此产生的技术代表了高价值的Suzuki-Miyaura联轴器在绿色合成方面的引人注目的进步。