Synthetic applications of a polymer supported air-stable palladium NHC complex with a spacer (catalyst 6, Pd–NHC@SP–PS) and without a spacer (catalyst 7, Pd–NHC@PS) have been studied for the Sonogashira cross-coupling reaction. The catalysts were prepared by immobilizing pre-formed IL on the polymer and reacting the resultant modified polymer with Pd(OAc)2 in THF at 60 °C. Both the catalysts were characterized
对于Sonogashira交叉偶联,已经研究了具有间隔基(催化剂6,Pd–NHC @
SP–PS)和没有间隔基(催化剂7,Pd–NHC @ PS)的聚合物负载的空气稳定
钯NHC复合物的合成应用。反应。通过将预先形成的IL固定在聚合物上并使所得的改性聚合物与Pd(OAc)2在THF中在60°C下反应来制备催化剂。两种催化剂都使用IR,
SEM,EDS,ICP,XPS和TGA / DTA进行了表征。已发现催化剂6比催化剂7更具活性由于活性催化位点的可及性较高,因此在好氧条件下,溶剂和无
铜Sonogashira交叉偶联反应中的各种芳基
溴化物和末端
炔烃都可以进行交联反应。还研究了间隔物,碱的性质,反应温度,催化剂负载量和可重复使用性的影响。