pre-catalyst. This nano catalyst was used for the efficient copper-free Sonogashira reaction of aryl halides in PEG-200 as a solvent. The nano Pd(0) that can be used as pre-prepared or as in situ-generated catalyst exhibited excellent reactivity and stability in the Sonogashira cross-coupling reactions with different aryl iodides, bromides, and also chlorides. This heterogeneous catalyst can be easily recovered
二氧化硅二苯基
次膦酸酯(S
DPP)用作固体载体,用于从作为前催化剂的Pd II生成纳米S
DPP / Pd(0)。该纳米催化剂用于在溶剂P
EG-200中有效地进行了芳基卤化物的无
铜Sonogashira反应。可以用作预制催化剂或原位生成的催化剂的纳米Pd(0)在Sonogashira与不同的芳基
碘化物,
溴化物以及
氯化物的交叉偶联反应中表现出出色的反应性和稳定性。这种非均相催化剂可以很容易地回收并在几次运行中重复使用。可以将P
EG用作溶剂和将K 2 CO 3用作
无机碱以及反应的非均质性质视为该反应的绿色条件。