An efficient copper-catalyzed method for the synthesis of quinolinones, pyridinones, and heteroannulated pyridinones via cascade reactions of substituted 2-iodo-, 2-bromo-, and 2-chlorobenzocarbonyls with 2-arylacetamides is reported. The protocol works well for the reaction of most of the 2-iodo-, 2-bromo- and 2-chlorobenzocarbonyls with 2-arylacetamides. copper iodide - diamines - cascade reactions
N-Iminopyridinium ylide-directed, cobalt-catalysed coupling of sp<sup>2</sup> C–H bonds with alkynes
作者:Se Hun Kwak、Olafs Daugulis
DOI:10.1039/d0cc05294a
日期:——
N-Iminopyridinium ylides are used as directing groups and internal oxidants for cobalt-catalysed annulation of sp2 C–H bonds with internal alkynes. The reactions possess excellent compatibility with heterocyclic substrates.
Development of a Traceless Directing Group: Cp*-Free Cobalt-Catalyzed C–H Activation/Annulations to Access Isoquinolinones
作者:Minghui Liu、Jun-Long Niu、Dandan Yang、Mao-Ping Song
DOI:10.1021/acs.joc.9b03073
日期:2020.3.20
A new tracelessdirectinggroup, 2-(hydroxymethyl)pyridine, has been reported for the Cp*-free cobalt-catalyzedC-H activation/annulation reaction to synthesize isoquinolinones. The reaction exhibits good functional group tolerance, affording products in good to excellent isolated yields under mild conditions. Notably, the directinggroup can be removed directly in situ along the catalytic process