Alkyl Complexes of Lanthanum and Samarium Supported by a Chiral Binaphthylamido Ligand. Syntheses, Structures, and Catalytic Activity in Hydroamination of Amino-1,3-dienes
作者:Isabelle Aillaud、Clarisse Olier、Yulia Chapurina、Jacqueline Collin、Emmanuelle Schulz、Régis Guillot、Jérôme Hannedouche、Alexander Trifonov
DOI:10.1021/om2002624
日期:2011.6.27
F)2(μ-Me)Li(THF)] (1) or tetranuclear [(R)-C20H12(NC5H9)2]La(μ-Me)2Li(THF)[(μ-Me)Li(THF)]2} (2) complexes with methyl ligands μ-bridging lanthanide and lithium atoms. The structures of complexes 1 and 2 were established by single-crystal X-ray diffraction and solution NMR studies. These new complexes were evaluated as catalysts to promote the enantioselective hydroamination of amino-1,3-dienes.
(R)-(+)-2,2'-双(环戊基氨基)-1,1'-联萘二胺与[Li(THF)n ] 3 [LnMe 6 ](Ln = La,Sm)在THF中的反应0°C取决于金属离子的大小,导致形成三核[(R)-C 20 H 12(NC 5 H 9)2 ] Sm [(μ-Me)2 Li(THF)2(μ-Me) Li(THF)](1)或四核[(R)-C 20 H 12(NC 5 H 9)2 ] La (μ-Me)2 Li(THF)[(μ-Me)Li(THF)]2 }(2)与甲基配体μ桥接镧系元素和锂原子的配合物。配合物1和2的结构是通过单晶X射线衍射和溶液NMR研究确定的。这些新的配合物被评估为催化剂,以促进对氨基-1,3-二烯的对映选择性加氢胺化。