Palladacycles of unsymmetrical (N,C<sup>−</sup>,E) (E = S/Se) pincers based on indole: their synthesis, structure and application in the catalysis of Heck coupling and allylation of aldehydes
作者:Mahabir P. Singh、Fariha Saleem、Gyandshwar K. Rao、S. Kumar、Hemant Joshi、Ajai K. Singh
DOI:10.1039/c6dt00060f
日期:——
[Pd(L1/L2–H)Cl] (1/2), where they bind in a tridentate (N,C−,E) mode. L1 and L2, their aldehyde precursors and Pd(II)-complexes, 1 and 2, have been characterized by 1H, 13C1H} and 77Se1H} NMR and HR-MS. Palladium(II) complexes 1 and 2 and precursor aldehydes of L1 and L2 were verified using single crystal X-ray diffraction. The catalytic activities of complexes 1 and 2 were investigated for Heck coupling
通过1-(2-苯基硫烷基/硒代乙基)-1 H的缩合反应,首次合成具有吲哚核的不对称(N,C,E)型钳位配体前体[ L1和L2:E = S / Se] -吲哚-3-甲醛与苄胺。合成规程很容易,并且收率很高(> 85%)。L1和L2与四氯钯钠(反应II在CH存在下)3 COONa结果在配合物[钯(L1 / L2 -H)CL](1 / 2),在那里它们结合在三齿(N,C - ,E)模式。L1和L2,其醛前体和Pd(II)配合物1和2的特征在于1 H,13 C 1 H}和77 Se 1 H} NMR和HR-MS。使用单晶X射线衍射验证了钯(II)配合物1和2以及L1和L2的前体醛。研究了配合物1和2的催化活性,以进行醛的Heck偶联和烯丙基化。这两个反应分别需要配合物负载量为0.1–0.3和1 mol%。