Rare earth metal bis(trimethylsilyl)amido complexes bearing pyrrolyl-methylamide ligand. Synthesis, structure, and catalytic activity towards guanylation of amines
作者:Chao Liu、Shuangliu Zhou、Shaowu Wang、Lijun Zhang、Gaosheng Yang
DOI:10.1039/c0dt00246a
日期:——
elemental analyses. The structures of complexes 2, 4 and 6 were determined by single-crystal X-ray analyses. X-Ray analyses discovered that two rare-earth metal ions were bridged by dianion ligand with the pyrrolyl ring which coordinated to one rareearth metal in an η5 mode, the tethered nitrogen anion and nitrogen atom of the pyrrolyl ring coordinated to another rareearth metal in η1 modes forming
所述Ñ -arylaminomethyl取代吡咯基通过还原2-[(2,4,6-Me 3 C 6)合成配体2-[(2,4,6-Me 3 C 6 H 2)NHCH 2 ](C 4 H 3 NH)(1)H 2)N CH](C 4 H 3 NH)使用NaBH 4。治疗[(Me 3 Si)2 N] 3 Ln(μ-Cl)Li(THF)31当量 回流中的1甲苯24小时,得到相应的三价稀土金属的酰胺与式(μ-η 5:η 1):η 1 -2 - [(2,4,6--ME 3 c ^ 6 ħ 2)NCH 2 ]Ç 4 H 3 N] LnN(SiMe 3)2 } 2(Ln = Y(2),Nd(3),Sm(4),Dy(5),Er(6))。所有化合物均通过光谱法和元素分析充分表征。复合物的结构2,4和6通过单晶X射线分析确定。X射线分析发现两个稀土类金属离子,通过与配位的一种稀土金属中的η的吡咯环的二价阴离子配体桥