Rhodium-Catalyzed Azine-Directed C–H Amidation with <i>N</i>-Methoxyamides
作者:Tao Ban、Huu-Manh Vu、Jing Zhang、Jia-Yuan Yong、Qiong Liu、Xu-Qin Li
DOI:10.1021/acs.joc.1c02868
日期:2022.5.6
N-methoxyamide reagents as an amide source, C–H amidation was realized at the ortho position of azine under the action of rhodium and boric acid. The method has mild reaction conditions, high atomic utilization, excellent yield, and wide adaptability to amidation reagents (both aromatic amides and fatty amides are applicable). Amide-substituted ketones can be obtained by a simple treatment and can be further transformed
Rhodium(III)-catalyzed coupling of aromatic ketazines or oximes with 2-vinyloxirane via C–H activation
作者:Jing Wen、An Wu、Yuqin Miao、Jin Zhu
DOI:10.1016/j.tetlet.2015.08.025
日期:2015.10
Described herein is a rhodium(III)-catalyzed coupling of aromatic ketazines or oximes with 2-vinyloxirane via directed C-H activation. This reaction proceeds efficiently under mild conditions with a low catalyst loading, especially in conditions with room temperature in the absence of additives for aromatic ketazines. A wide range of substituted substrates is supported and a possible mechanism is proposed according to the experimental results of kinetic isotopic effect, reversibility studies, and catalysis with rhodacycle intermediate c1. (C) 2015 Elsevier Ltd. All rights reserved.
Rhodium(III)-Catalyzed Directed <i>ortho</i>-C–H Bond Functionalization of Aromatic Ketazines via C–S and C–C Coupling
作者:Jing Wen、An Wu、Mingyang Wang、Jin Zhu
DOI:10.1021/acs.joc.5b01154
日期:2015.11.6
Described herein is a convenient and efficient method for sulfuration and olefination of aromatic ketazines via rhodium-catalyzed oxidative C-H bond activation. A range of substituted substrates are supported, and a possible mechanism is proposed according to experimental results of kinetic isotopic effect, reversibility studies, and catalysis of rhodacycle intermediate c1.