首页> 外文期刊>Chemistry: A European journal >Simultaneous Induction of Axial and Planar Chirality in Arene-Chromium Complexes by Molybdenum-Catalyzed Enantioselective Ring-Closing Metathesis
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Simultaneous Induction of Axial and Planar Chirality in Arene-Chromium Complexes by Molybdenum-Catalyzed Enantioselective Ring-Closing Metathesis

机译:钼催化的对映选择性环封闭复分解同时诱导芳烃-铬络合物的轴向和平面手性

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摘要

The molybdenum-catalyzed asymmetric ring-closing metathesis of the various C-s-symmetric (pi-arene)-chromium substrates provides the corresponding bridged planar-chiral (pi-arene) chromium complexes in excellent yields with up to > 99% ee. With a bulky and unsymmetrical substituent, such as N-indolyl or 1-naphthyl, at the 2-positions of the eta(6)-1,3-diisopropenylbenzene ligands, both biaryl-based axial chirality and pi-arene-based planar chirality are simultaneously induced in the products. The axial chirality is retained even after the removal of the dicarbonylchromium fragment, and the chiral biaryl/heterobiaryl compounds are obtained with complete retention of the enantiopurity.
机译:各种Cs对称(π芳烃)-铬底物的钼催化不对称闭环复分解反应提供了相应的桥联平面手性(pi-arene)铬络合物,且收率高达99%ee以上。在eta(6)-1,3-二异丙烯基苯配体的2位上具有庞大且不对称的取代基,例如N-吲哚基或1-萘基,基于联芳基的轴向手性和基于pi-芳烃的平面手性在产品中同时被诱导。甚至在除去二羰基铬片段后,仍保留了轴向手性,并且在完全保留对映体纯度的情况下获得了手性联芳基/杂联芳基化合物。

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