o-(Cyclohexyliminoethyl)(arylamido)benzene and related complexes of zirconium and titanium. The non-innocence of the ketimino functionality
作者:Robin M. Porter、Andreas A. Danopoulos
DOI:10.1039/b404173a
日期:——
N-Arylamido complexes of zirconium in which the amido functional group is attached to an o-(alkyliminoethyl) substituted aromatic ring, have been synthesised by salt elimination reactions and characterised by spectroscopic and diffraction methods; they are analogous to the N-silylamido species recently reported (Dalton Trans., 2002, 3290–3299). The ligands 2-[CyNC(CH3)]C6H4N(H)(xyl), LxylH, and 2-[CyNC(CH3)]C6H4N(H)(mes) LmesH, Cy = C6H11, xyl = 3,5-Me2C6H3 mes = 2,4,6-Me3C6H2, were prepared in good yields by Buchwald–Hartwig amination of the arylbromides with 2-[CyNC(CH3)]C6H4NH2. Reaction of LmesLi with Zr(NEt2)2Cl2(thf)2 gave after chloride substitution the arylamido ketimino complex LmesZr(NEt2)2Cl 1; variable amounts of the arylamido vinylamido complex 2 were also obtained. Interaction of LmesLi or LxylLi with Ti(NMe2)2Cl2 gave rise to the tripodal bis-amido amino complexes 5 and 6 possibly formed by ligand rearrangement involving migration of the dimethylamido group to the ketimino carbon.
通过消盐反应合成了锆的 N-芳酰胺配合物,其中的酰胺官能团连接到邻(烷基亚氨基乙基)取代的芳香环上,并通过光谱和衍射方法对其进行了表征;它们类似于最近报道的 N-硅酰胺种类(Dalton Trans.)配体 2-[CyNC(CH3)]C6H4N(H)(xyl)、LxylH 和 2-[CyNC(CH3)]C6H4N(H)(mes) LmesH(Cy = C6H11,xyl = 3,5-Me2C6H3 mes = 2,4,6-Me3C6H2)是通过芳溴化物与 2-[CyNC(CH3)]C6H4NH2 的 Buchwald-Hartwig 酰胺化反应制备的,产率良好。将 LmesLi 与 Zr(NEt2)2Cl2(thf)2 反应,在氯取代后得到芳酰胺基酮亚氨基络合物 LmesZr(NEt2)2Cl 1;还得到了不同数量的芳酰胺基乙烯基氨基络合物 2。LmesLi 或 LxylLi 与 Ti(NMe2)2Cl2 相互作用产生了三元双氨基络合物 5 和 6,这可能是通过配体重排涉及二甲基氨基迁移到酮亚氨基碳而形成的。