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首页> 外文期刊>Chirality: The pharmacological, biological, and chemical consequences of molecular asymmetry >Determination of the absolute stereochemistry of chiral biphenanthiryls in solution phase using chiroptical spectroscopic methods: 2,2 '-diphenyl-[3,3 '-biphenanthrene]-4,4 '-diol
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Determination of the absolute stereochemistry of chiral biphenanthiryls in solution phase using chiroptical spectroscopic methods: 2,2 '-diphenyl-[3,3 '-biphenanthrene]-4,4 '-diol

机译:使用手性光谱法测定溶液相中手性联菲的绝对立体化学:2,2'-联苯-[3,3'-联菲] -4,4'-二醇

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摘要

Although the exciton coupling model has been widely used in the literature to suggest the absolute configuration using electronic circular dichroism (ECD) spectra, chiral biphenanthryl systems are one group of molecules where the application of the exciton model yields ambiguous conclusions. The use of 2,2'-diphenyl-[3,3'-biphenanthrene]-4,4'-diol, known as VAPOL, as a chiral ligand for enantioselective catalysis necessitates the reliable determination of its absolute configuration. Based on the X-ray diffraction data of its phosphoric amide derivative, the configuration of VAPOL has been determined in the literature to be (+)-(aS). The experimental vibrational circular dichroism, ECD and optical rotatory dispersion spectra, and corresponding quantum mechanical predictions of VAPOL are used in this manuscript to independently determine its absolute configuration.
机译:尽管激子耦合模型已在文献中广泛使用,以提出使用电子圆二色性(ECD)光谱的绝对构型,但手性联菲基系统是其中激子模型的应用得出模糊结论的一组分子。使用2,2'-二苯基-[3,3'-联菲] -4,4'-二醇(称为VAPOL)作为手性配体进行对映选择性催化,需要可靠地确定其绝对构型。基于其磷酸酰胺衍生物的X射线衍射数据,在文献中已将VAPOL的构型确定为(+)-(aS)。该手稿采用实验振动圆二色性,ECD和旋光色散谱以及相应的VAPOL量子力学预测来独立确定其绝对构型。

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