在本文中,据报道,在胺和双氧存在下,铜与8-氨基喹啉作为导向基团形成酰胺的铜催化直接C–C键裂解。与以前的通过C–H活化进行酰胺化的C–H胺相比,该反应提出了催化剂和氧化剂控制的C–C键裂解策略,可通过自由基过程进行酰胺化。CuBr / Ag 2 CO 3 / O 2在150°C下表现出最好的催化效果。一系列的芳基和烷基酰胺与该转化相容。值得注意的是,该方法提供了获得最重要的工业材料之一环己酮的途径。研究了该反应的途径。
Selective C–C bond cleavage of amides fused to 8-aminoquinoline controlled by a catalyst and an oxidant
作者:Sen Li、Kun Jie、Wenjie Yan、Qingjun Pan、Min Zhang、Yufeng Wang、Zhengjiang Fu、Shengmei Guo、Hu Cai
DOI:10.1039/d0cc04960c
日期:——
Herein, copper-catalyzed direct C–C bond cleavage of amides fused to 8-aminoquinoline as a directing group to form urea in the presence of amines and dioxygen is reported. Compared to the previous C–H aminations of amides via C–H activation, this reaction presents a catalyst and oxidant controlled C–C bond cleavage strategy that enables amidation through a radical process. CuBr/Ag2CO3/O2 shows the
在本文中,据报道,在胺和双氧存在下,铜与8-氨基喹啉作为导向基团形成酰胺的铜催化直接C–C键裂解。与以前的通过C–H活化进行酰胺化的C–H胺相比,该反应提出了催化剂和氧化剂控制的C–C键裂解策略,可通过自由基过程进行酰胺化。CuBr / Ag 2 CO 3 / O 2在150°C下表现出最好的催化效果。一系列的芳基和烷基酰胺与该转化相容。值得注意的是,该方法提供了获得最重要的工业材料之一环己酮的途径。研究了该反应的途径。
Understanding Ni(II)-Mediated C(sp<sup>3</sup>)–H Activation: Tertiary Ureas as Model Substrates
作者:D. Dawson Beattie、Anna C. Grunwald、Thibaut Perse、Laurel L. Schafer、Jennifer A. Love
DOI:10.1021/jacs.8b07708
日期:2018.10.3
study of C(sp3)-H bond activation mediated by nickel. Cyclometalated Ni(II) ureate [(PEt3)Ni(κ3- C,N,N-(CH2)N(Cy)(CO)N((N)-quinolin-8-yl))] was synthesized and isolated from the urea precursor, (Me)(Cy)N(CO)N(H)(quinolin-8-yl), via C(sp3)-H activation. We investigated the effects of solvents and base additives on the rate of C-H activation. Kinetic isotope effect experiments showed that C-H activation