Alkyl Grignard cross-coupling of aryl phosphates catalyzed by new, highly active ionic iron(<scp>ii</scp>) complexes containing a phosphine ligand and an imidazolium cation
作者:Zhuang Li、Ling Liu、Hong-mei Sun、Qi Shen、Yong Zhang
DOI:10.1039/c6dt02995g
日期:——
ionic iron(II) complex, [HIPr][Fe(C4H8O)Cl3] (1), has been isolated from the reaction of FeCl2(THF)1.5 with one equiv. of [HIPr]Cl in 90% yield and it can further react with one equiv. of PPh3 or PCy3, affording the corresponding target iron(II) complex 2 or 3, respectively. All these complexes were characterized by elemental analysis, electrospray ionization mass spectrometry (ESI-MS), 1H NMR spectroscopy
一种新型的家庭离子铁(的II通式[HL]的)配合物的[Fe(PR' 3)X 3 ](HL = 1,3-双(2,6-二异丙基)咪唑鎓阳离子,HIPR,R'= Ph,X = Cl,2 ; HL = HIPr,R'= Cy,X = Cl,3 ; HL = HIPr,R'= Ph,X = Br,4 ; HL = HIPr,R'= Cy,X = Br ,5 ; HL = 1,3-双(2,4,6-三甲基苯基)咪唑鎓阳离子,HIMes,R'= Cy,X = Br,6)易于通过分步制备88%–92%的产率。另外,离子铁(II)络合物[HIPr] [Fe(C 4 H 8 O)Cl 3 ](1),已从FeCl 2(THF)1.5与一当量的反应中分离出来。的[HIPr] Cl的收率为90%,并且可以进一步与一个当量反应。PPh 3或PCy 3分别生成相应的目标铁(II)配合物2或3。所有这些配合物均通过元素分析,电喷雾电离质谱(ESI-MS),1