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.
Pd(DIPHOS)<sub>2</sub>-Catalyzed Cross-Coupling Reactions of Organoborons with Free or Polymer-Bound Aryl Halides
作者:Dibyendu De、Donald J. Krogstad
DOI:10.1021/ol991356m
日期:2000.4.1
Bis[1,2-bis(diphenylphosphino)ethane]palladium(0) [Pd(DIPHOS)2] catalyzes cross-coupling reactions of free or polymer-bound aryl halides with organoboron compounds to produce biaryls in overall yields of 60-96%.
Development of C–N coupling processes is fundamentally important and challenging for the synthesis of biologically active molecules and drugs. Herein, we report a highly atom efficient green process for the synthesis of α-ketoamides via visible-light induced copper(I) chloride catalysed direct oxidative Csp–N coupling reactions using commercially available alkynes and anilines at room temperature without
Switchable multipath cascade cyclization to synthesize bicyclic lactams and succinimides <i>via</i> chemodivergent reaction
作者:Yimei Song、Chaofei Wu、Jinhai Zhang、Wenhai Zhang、Xin Qin、Yixiao Yang、Guowei Kang、Jun Jiang、Hongxin Liu
DOI:10.1039/d2cc06841a
日期:——
Herein, a novel switchable multipath cascade cyclizationvia chemodivergent reaction between readily available ketoamides and deconjugated butenolides was developed to efficiently synthesize γ-lactone fused γ-lactams and succinimide fused hemiketals. The Aldol/aza-Michael reaction and Aldol/imidation/hemiketalization reaction were enabled by catalytic amounts of two bases, namely tetramethyl guanidine
Base-Promoted Tandem Pathway for Keto-Amides: Visible Light-Mediated Room-Temperature Amidation Using Molecular Oxygen as an Oxidant
作者:Suman Das、Soumya Mondal、Siba P. Midya、Subal Mondal、Eliza Ghosh、Pradyut Ghosh
DOI:10.1021/acs.joc.3c00686
日期:2023.11.3
electron-rich aromatic amines, aliphatic amines, and phenacyl bromide derivatives proceeded the present transformation with marginally superior reactivity in comparison to electron-deficient aromatic amines and phenacyl bromide derivatives. Moreover, several control experiments, in situ isolation of secondary amine and imine as key intermediates, and 18O-labeling experiments provide complete insight into the mechanism