Iron(II) Complexes Containing Chiral Unsymmetrical PNP′ Pincer Ligands: Synthesis and Application in Asymmetric Hydrogenations
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https://figshare.com/articles/dataset/Iron_II_Complexes_Containing_Chiral_Unsymmetrical_PNP_Pincer_Ligands_Synthesis_and_Application_in_Asymmetric_Hydrogenations/4206486
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资源简介：
Four new chiral PNP′
pincer ligands with a scaffold consisting
of a planar chiral ferrocene and a centro chiral aliphatic unit were
synthesized and characterized. Treatment of anhydrous FeBr2(THF)2 with 1 equiv of the unsymmetrical chiral PNP′
pincer ligands afforded complexes of the general formula [Fe(PNP′)Br2]. In the solid state these complexes adopt a tetrahedral
geometry with the PNP′ ligands coordinated in a κ2P,N-fashion, as shown by
X-ray crystallography. These complexes react with CO in the presence
of NaBH4 to yield hydride complexes of the type [Fe(PNP′)(H)(Br)(CO)],
which were isolated and tested as catalysts in the asymmetric hydrogenation
of ketones. Enantioselectivities of up to 81% ee were obtained.
创建时间：
2016-11-08
