Highly Efficient Hydrophosphonylation of Aldehydes and Unactivated Ketones Catalyzed by Methylene-Linked Pyrrolyl Rare Earth Metal Amido Complexes
作者:Shuangliu Zhou、Zhangshuan Wu、Jiewei Rong、Shaowu Wang、Gaosheng Yang、Xiancui Zhu、Lijun Zhang
DOI:10.1002/chem.201102207
日期:2012.2.27
characterized by 1H NMR spectroscopic analyses. The structures of complexes 2, 3, 4, and 6 were determined by single‐crystal X‐ray analyses. Study of the catalytic activities of the complexes showed that these rare earth metal amido complexes were excellent catalysts for hydrophosphonylations of aldehydes and unactivated ketones. The catalyzed reactions between diethyl phosphite and aldehydes in the presence
通过甲硅烷基胺消除反应制备了一系列带有亚甲基连接的吡咯基-酰胺基配体的稀土金属酰胺配合物,在无溶剂条件下,液态底物在醛和未活化酮的氢膦酰化反应中显示出很高的催化活性。的治疗[(ME 3 Si)的2 N] 3 LN(μ-Cl)的锂(THF)3与2-(2,6--ME 2 ç 6 ħ 3 NHCH 2)C 4 H ^ 3 NH(1,1个当量)在甲苯,得到相应的式三价稀土金属酰胺(μ-η 5:η 1):η 1-2-[(2,6-Me 2 C 6 H 3)NCH 2 ](C 4 H 3 N)LnN(SiMe 3)2 } 2 [Ln = Y(2),Nd(3),Sm(4),Dy(5),Yb(6)],产量适中。所有化合物均通过光谱法和元素分析充分表征。钇配合物的特征还在于1 H NMR光谱分析。复合物的结构 2,3,4,和6由单晶X射线分析确定。配合物催化活性的研究表明,这些稀土金属酰胺配合物是醛和未活化