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Asymmetric Hydrogenation of phenanthridines with Chiral Boranes

Chinese Journal of Chemistry 2024年第6期42卷 631-635页

作者： Guangyu Cui Xiangqing Feng Haifeng Du Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Molecular Recognition and FunctionInstitute of ChemistryChinese Academy of SciencesBeijing100190 China University of Chinese Academy of Sciences Beijing100049 China

The asymmetric hydrogenation of N-heteroarenes provides an efficient method for the synthesis of optically active cyclic secondary *** this paper,we described an asymmetric hydrogenation of phenanthridines using a chiral mono-alkene-derived borane.A variety of dihydrophenanthridines were furnished in high yields with up to 93%*** current catalytic system was very sensitive for the steric hindrance of *** substituents at one phenyl group of phenanthridines were required to obtain the high *** large substituents on the carbon of the C=N bonds would diminish the reactivity sharply.

关键词： Asymmetric catalysis Hydrogenation Nitrogen heterocycles phenanthridines Frustrated Lewis pairs Chiral boranes

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Covalent Organic Frameworks:A Promising Photocatalyst for Visible-Light-Driven Organic Transformations

Covalent Organic Frameworks:A Promising Photocatalyst for Vi...

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中国化学会·第十六届全国有机合成化学学术研讨会

作者：刘书扬 Wenna Pan Songxiao Wu Xiubin Bu Shigang Xin Jipan Yu Hao Xu Xiaobo Yang 河南大学 Institute of Catalysis for Energy and Environment College of Chemistry & Chemical EngineeringShenyang Normal University Laboratory of Nuclear Energy Chemistry Institute of High Energy PhysicsChinese Academy of Sciences College of Chemistry and Chemical Engineering Henan University

Covalent organic frameworks(COFs),due to its high stability,large surface areas,good molecular tenability and excellent optical properties,has become a promising heterogenous photocatalyst for visible-light-driven organic transformations. Benefited from its inherent heterogenous nature,it can be readily removed from the organic reaction system,which is suited for the industrial application. In this context,a visible-light-driven protocol for the syntiesis of diverse 6-substituted-phenanthridines from 2-aryl phenyl isocyanides has been developed, in which the hydrazonc-based two-dimensional covalent organic frameworks(2 D-COF-1) was used as the heterogeneous *** protocol features excellent catalyst recyclability and high ***,it opens up doors to uncover more new photocatalytic organic approaches catalysed by covalent organic frameworks.

关键词： covalent organic frameworks visible-light-driven photocatalyst phenanthridines isocyanides

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