A series of Pd(II)‐enaminone complexes, termed Pd(eao)₂, have been synthesized and characterized. The investigation on the catalytic activities of these new Pd(II)‐reagents has proved that the Pd(eao)₂‐1 possesses excellent catalytic activity for the Suzuki‐ Miyaura cross coupling reactions of aryl bromides/chlorides with aryl/vinyl boronic acids in the environmentally benign media of aqueous PEG400 at low loading (5 mol‰). The superiority of this Pd(II)‐reagent to those commercial Pd(II) and Pd(0) catalysts in catalyzing the reactions has been confirmed by parallel experiments. What's more, Pd(eao)₂‐2 has been found as a practical catalyst for the homo‐coupling reactions of aryl boronic acids.

中文翻译：

---

Enaminone-Pd（II）配合物的合成及其在Suzuki-Miyaura水溶液交叉偶联反应中的应用

已合成并表征了一系列称为Pd（eao）₂的Pd（II）-烯胺酮络合物。对这些新的Pd的催化活性的调查（II）-reagents证明，加入Pd（EAO）₂ - 1具有优异的催化活性的为芳基溴化物/氯化物与芳基/乙烯基硼酸在Suzuki- Miyaura交叉偶联反应低载量（5 mol‰）下水性PEG400的环境友好介质。平行实验证实了该Pd（II）试剂在催化反应中优于商用Pd（II）和Pd（0）催化剂。更重要的是，将Pd（EAO）₂ - 2已发现作为用于芳基硼酸均聚偶联反应一实用的催化剂。