Crystal structure of chiral binaphthol lanthanide complexes and their catalysis in asymmetric transfer hydrogenation of acetophenone
Crystal structure of chiral binaphthol lanthanide complexes and their catalysis in asymmetric transfer hydrogenation of acetophenone
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DOI：
10.1002/aoc.1058
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发表时间：
2006-05
影响因子：
3.9
通讯作者：
Pengfei Yan;C. Nie;Guangming Li;Guangfeng Hou;Wenbin Sun;Jin‐Sheng Gao
中科院分区：
文献类型：
--
作者：
Pengfei Yan;C. Nie;Guangming Li;Guangfeng Hou;Wenbin Sun;Jin‐Sheng Gao
异金属 [(THF)2Na]3[Ln(R-Binolate)3(H2O)] [Ln = Sm (1) 和 Gd (2)]是通过 LnCl3 或 LnBr3 与 3 等量的 Na(R-HBinolate)反应合成的，并通过 X 射线晶体分析进行了表征。结构分析表明，1 和 2 是同构复合物，结晶为六方空间群 P63，对称性为 C3。1 和 2 中镧系离子的配位几何最近似于单帽三角反棱柱。当复合物 1 和 2 被用作苯乙酮 Meerwein-Ponndorf-Verley (MPV) 反应的催化剂时，1 和 2 分别以 94% 和 85% 的对映体过量（e.e.）分离出 S-苯乙醇。Copyright © 2005 John Wiley & Sons, Ltd. All Rights Reserved.
Heterometallic [(THF)2Na]3[Ln(R-Binolate)3(H2O)] [Ln = Sm (1) and Gd (2)] has been synthesized by the reactions of either LnCl3 or LnBr3 with 3 equiv. Na(R-HBinolate) and characterized by X-ray crystallographic analysis. Structural analyses proposed that 1 and 2 are isomorphous complexes, crystallizing in the hexagonal space group P63 with C3 symmetry. The coordination geometry of the lanthanide ions in 1 and 2 can be best approximated as a mono-capped triangle antiprism. When complexes 1 and 2 were employed as catalysts in the Meerwein–Ponndorf–Verley (MPV) reactions of acetophenone, the S-phenylethanol was separated in 94 and 85% enantiomeric excess (e.e.) for 1 and 2, respectively. Copyright © 2005 John Wiley & Sons, Ltd.