α‐Diimine–Palladium Complexes Incorporated in Vinylic‐Addition Polynorbornenes: Synthesis and Catalytic Activity
作者:Jesús A. Molina de la Torre、Ana C. Albéniz
DOI:10.1002/ejic.201700323
日期:2017.6.16
polymeric ligands have been synthesized using the bicyclic norbornane structure, present in vinylic-addition polynorbornene (VA-PNB). The VA-PNB–diimine ligands have been prepared by functionalization of the copolymer obtained by Ni-catalyzed polymerization of norbornene and norbornenylcarbonate. Immobilized palladium complexes of the type VA-PNB–diimine–PdX2 have been prepared, and their catalytic activity
已经使用存在于乙烯基加成聚降冰片烯(VA-PNB)中的双环降冰片烷结构合成了α-二胺聚合物配体。VA-PNB-二亚胺配体是通过镍催化降冰片烯和降冰片烯基碳酸酯的聚合反应制得的共聚物官能化而制备的。制备了VA-PNB–diimine–PdX 2型固定化钯配合物,并测试了其催化活性。三氟乙酰基络合物(X = CF 3可以用作铃木反应中的可循环使用的预催化剂。它是微量的均相钯活性物质的来源,它们以高周转数进行催化。回收的聚合物配合物可以重复使用几次,而活性没有明显损失。布鲁克哈特催化剂的聚合物类似物VA-PNB-二亚胺-PdMeCl也可以聚合乙烯,尽管它的活性不如单体。