Synthesis of 3-hydroxyoxindoles by Pd-catalysed intramolecular nucleophilic addition of aryl halides to α-ketoamides
作者:Yi-Xia Jia、Dmitry Katayev、E. Peter Kündig
DOI:10.1039/b917958e
日期:——
Pd/PtBu(3)-catalysed intramolecularnucleophilic addition of arylhalides to alpha-ketoamides in the presence of nBuOH and base has been realized with high yields, providing a new, direct, and efficient synthetic strategy to obtain 3-hydroxyoxindoles.
A nickel-catalyzed intramolecularaddition of vinyl or aryl bromides to ketoamides has been developed. The reactions proceeded efficiently with Ni(bpy)Br2 as a catalyst and zinc powder as reducing agent, affording 3-hydroxypyrrolidinones, 3-hydroxyoxindoles, and dihydroquinolinones as important heterocyclic compounds in good to excellent yields.
Electrochemical low valent cobalt-catalyzed addition of aryl and vinyl chlorides to α-ketoamides via C–Cl bond activation
作者:Prashant S. Shinde、Valmik S. Shinde、Magnus Rueping
DOI:10.1039/d4cc00309h
日期:——
The development of an electrochemical cobaltcatalyzed C–Cl bond activation at room temperature for the nucleophilic addition of aryl and vinyl chlorides to α-ketoamides is described. The overall method operates through an electrochemically induced lowvalentcobalt catalyst that oxidatively adds to aryl or vinyl chlorides affording medicinally important 3-hydroxy oxindole and 3-hydroxypyrrolidinone