Complexes of Pd(Ⅱ)with NHC ligands can suffer facile decomposition in the presence of alkali metal hydroxides,alkoxydes and other strong oxygen-containing bases via the reductive elimination of the NHC and Pd-coordin...Complexes of Pd(Ⅱ)with NHC ligands can suffer facile decomposition in the presence of alkali metal hydroxides,alkoxydes and other strong oxygen-containing bases via the reductive elimination of the NHC and Pd-coordinated base anion,the so-called O-NHC coupling.O-NHC coupling can represent a serious problem for the stability of Pd/NHC catalytic systems in numerous practically important reactions conducted in the presence of bases.In the present study,a new approach to stabilizing the Pd-NHC bond against cleavage by strong bases was developed.展开更多
基金supported by the Russian Science Foundation,RSF grant 19-73-10100(studies of Pd/NHC complex stability and catalytic activity)by the Ministry of Science and Higher Education of the Russian Federation,project 2019-0990(synthesis of Pd/NHC complexes).
文摘Complexes of Pd(Ⅱ)with NHC ligands can suffer facile decomposition in the presence of alkali metal hydroxides,alkoxydes and other strong oxygen-containing bases via the reductive elimination of the NHC and Pd-coordinated base anion,the so-called O-NHC coupling.O-NHC coupling can represent a serious problem for the stability of Pd/NHC catalytic systems in numerous practically important reactions conducted in the presence of bases.In the present study,a new approach to stabilizing the Pd-NHC bond against cleavage by strong bases was developed.
