Highly Diastereo- and Enantioselective Synthesis of Tetrahydrobenzo[b]azocines via Palladium-Catalyzed [4 + 4] Cycloaddition
作者:Can Gao、Xunhua Wang、Jitian Liu、Xiaoxun Li
DOI:10.1021/acscatal.0c05515
日期:2021.3.5
The construction of N-heterocyclic eight-membered rings with good regio-, stereo-, and enantioselective control remains a formidable challenge in asymmetric catalysis. Herein, we report a palladium-catalyzed asymmetric [4 + 4] cycloaddition of anthranils with γ-methylidene-δ-valerolactones in the presence of Et3B, delivering highly functionalized tetrahydrobenzo[b]azocine derivatives in high efficiency
α,β-Functionalization of saturated ketones with anthranils via Cu-catalyzed sequential dehydrogenation/aza-Michael addition/annulation cascade reactions in one-pot
An efficient method to access functionalized quinolines from the readily available saturatedketones and anthranils have been explored. This one-pot cascade reaction involves the in situ generation of α,β-unsaturated ketones by the copper catalysed dehydrogenation of saturatedketones followed by the aza-Michael addition of anthranils and subsequent annulation.
amination/annulation strategy was developed for the synthesis of benzophenanthroline derivativesusing quinoline N‐oxides and anthranils. The method was further extended to the synthesis of nitrogen‐containing extended π‐conjugated benzophenanthrolinone derivatives. Late‐stage functionalizations of cinchonidine and cinchophen derivatives and synthesis of a bioactive quinolino‐indole were achieved.
Rh(<scp>iii</scp>)-Catalyzed tandem indole C4-arylamination/annulation with anthranils: access to indoloquinolines and their application in photophysical studies
the tandem C4 arylamination/annulation of indole derivatives with anthranil to provide indoloquinoline moieties. This method is simple and regioselective with a wide scope and functional group tolerance. Mechanistic studies revealed the important role of the newly installed azacycle in the conversion of O-protected aldoximes to their cyano derivatives. Studies were carried out to explore the promising