Four chiral dinuclear rare-earth metal complexes [REL¹]₂ (RE = Y(1), Eu(2), Nd(3), La (4)) stabilized by Trost proligand H₃L¹ (H₃L¹ = (S,S)-2,6-bis[2-(hydroxydiphenylmethyl)pyrrolidin-1-ylmethyl]-4-methylphenol) were first prepared, and all were characterized by X-ray diffraction. Complex 4 was employed as the catalyst for enantioselective hydroboration reaction of substituted ketones, and the corresponding secondary alcohols with excellent yields and high ee values were obtained using reductant HBpin. The same result was also achieved using the combination of lanthanium amides La[N(SiMe₃)₂]₃ with Trost proligand H₃L¹ in a 1:1 molar ratio. The experimental findings and DFT calculation revealed the possible mechanism of the enantioselective hydroboration reaction and defined the origin of the enantioselectivity in the current system.

中文翻译：

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含Trost配体的稀土金属配合物催化的酮的对映选择性硼氢化。

四个手性双核稀土金属络合物[REL ¹ ] ₂（RE = Y（1），Eu（2），Nd（3），La（4））由Trost proligand H ₃ L ¹（H ₃ L ¹ =首先制备（S，S）-2，6-双[2-（羟基二苯基甲基）吡咯烷-1-基甲基] -4-甲基苯酚，并通过X射线衍射对其进行表征。复杂4将其用作取代酮的对映选择性硼氢化反应的催化剂，使用还原剂HBpin可制得具有优异收率和较高ee值的相应仲醇。同样的结果，使用镧酰胺的La [N（森的组合也实现₃）₂ ] ₃与特罗斯特前配体ħ ₃大号¹ 1的摩尔比：在一个1。实验结果和DFT计算揭示了对映选择性硼氢化反应的可能机理，并确定了当前系统中对映选择性的起源。