Expanding the Range of “Daniphos”‐Type P∩P‐ and P∩N‐Ligands: Synthesis and Structural Characterisation of New [(η
<sup>6</sup>
‐arene)Cr(CO)
<sub>3</sub>
] Complexes
作者:Elisabetta Alberico、Wolfgang Braun、Beatrice Calmuschi‐Cula、Ulli Englert、Albrecht Salzer、Daniel Totev
DOI:10.1002/ejic.200700568
日期:2007.11
benzylamine are diastereotopic, which means that diastereomeric complexes arise upon coordination of theCr(CO)3 fragment to either of these two faces, the synthetic plan has been adjusted by exploiting the trimethylsilyl group as a temporary steric modulator in order to access both complexes with high diastereoselectivity. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
合成了新的 P∩P- 和 P∩N- 配体,其核心结构是 [(η6-芳烃)Cr(CO)3] 单元。这些新的配体扩展了“Daniphos”配体的范围,具有中心和平面手性,并且是通过立体选择性合成策略从光学纯的苄胺中制备的,这些苄胺在芳烃上带有除苄基二甲氨基以外的第二个取代基。由于不对称的 1,2- 和 1,3-二取代苄胺的两个面是非对映异构的,这意味着在 Cr(CO)3 片段与这两个面中的任何一个配位时会产生非对映复合物,因此合成计划已通过利用三甲基甲硅烷基作为临时空间调节剂,以便以高非对映选择性获得两种复合物。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)