Visible-Light-Promoted Oxidative Amidation of Bromoalkynes with Anilines: An Approach to α-Ketoamides
作者:Ke Ni、Ling-Guo Meng、Kuai Wang、Lei Wang
DOI:10.1021/acs.orglett.8b00586
日期:2018.4.20
A convenient and practical synthetic route to α-ketoamides from bromoalkynes and anilines through phototriggered organic transformations via a C–N cross-coupling and an oxidation of C≡C was developed. The reaction could be furnished without an external photocatalyst at ambient conditions, and a wide range of α-ketoamides were obtained in good yields.
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.
Nickeleophilic addition! The first example of a nickel‐catalyzed direct intramolecular nucleophilic addition of aryl or vinyl chlorides to α‐ketoamides throughCCl bondactivation is reported, which takes place under mild reaction conditions (see scheme).
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.