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Chelation-Assisted Nickel-Catalyzed Oxidative Annulation via Double C-H Activation/Alkyne Insertion Reaction

机译:通过双C-H活化/炔烃插入反应的螯合辅助镍催化的氧化环化

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摘要

A nickel/NHC system for regioselective oxidative annulation by double C-H bond activation and concomitant alkyne insertion is described. The catalytic reaction requires a bidentate directing group, such as an 8-aminoquinoline, embedded in the substrate. Various 5,6,7,8-tetrasubstituted-N-(quinolin-8-yl)-1-naphthamides can be prepared as well as phenanthrene and benzo[h]quinoline amide derivatives. Diarylalkynes, dialkylalkynes, and arylalkylalkynes can be used in the system. A Ni-0/Ni-II catalytic cycle is proposed as the main catalytic cycle. The alkyne plays a double role as a two-component coupling partner and as a hydrogen acceptor.
机译:本发明描述了一种镍/ NHC系统,该系统通过双C-H键活化和伴随的炔烃插入来进行区域选择性的氧化环化。催化反应需要嵌入基质中的双齿引导基团,例如8-氨基喹啉。可以制备各种5,6,7,8-四取代-N-(喹啉-8-基)-1-萘酰胺,以及菲和苯并[h]喹啉酰胺衍生物。该系统中可以使用二芳基炔,二烷基炔和芳烷基炔。提出了Ni-0 / Ni-II催化循环作为主要催化循环。炔烃作为两组分偶联伙伴和氢受体起着双重作用。

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