已成功开发出一种有效的多相钯-多金属氧酸盐钯-H 6 PV 3 Mo 9 O 40 / C催化剂,用于通过碳-氢(CH)活化和碳-氮(CN)形成碳-碳(CC)键通过使用氧作为末端氧化剂的氧化胺化形成键。偶联过程很简单,并且使用相对温和的条件来形成所需的产物。此外,由于不需要其他试剂(例如有机/无机氧化剂),因此产生的废物更少,并且水是唯一产生的副产物。
CC Bond Formation via CH Activation and CN Bond Formation via Oxidative Amination Catalyzed by Palladium- Polyoxometalate Nanomaterials Using Dioxygen as the Terminal Oxidant
作者:Leng Leng Chng、Jie Zhang、Jinhua Yang、Makhlouf Amoura、Jackie Y. Ying
DOI:10.1002/adsc.201100362
日期:2011.11
An efficient heterogeneous palladium-polyoxometalate catalyst with the formula Pd-H6PV3Mo9O40/C has been successfully developed for carbon-carbon (CC) bond formation via carbon-hydrogen (CH) activation and carbon-nitrogen (CN) bond formation viaoxidative amination using oxygen as the terminal oxidant. The coupling processes are simple, and use relatively mild conditions to form the desired products
已成功开发出一种有效的多相钯-多金属氧酸盐钯-H 6 PV 3 Mo 9 O 40 / C催化剂,用于通过碳-氢(CH)活化和碳-氮(CN)形成碳-碳(CC)键通过使用氧作为末端氧化剂的氧化胺化形成键。偶联过程很简单,并且使用相对温和的条件来形成所需的产物。此外,由于不需要其他试剂(例如有机/无机氧化剂),因此产生的废物更少,并且水是唯一产生的副产物。
Pd-catalyzed aerobic oxidative coupling of anilides with olefins through regioselective C–H bond activation
Pd-catalyzed aerobic oxidative coupling of anilides with olefins was achieved through selective C–H bond activation. Compared to the previous studies, not only did we successfully use molecular oxygen to replace the chemical oxidant, but we also obtained improved yields for a number of substrates. The reaction tended to give high yields for electron-rich anilides and electron-deficient olefins, with
Selective Pd-Catalyzed Oxidative Coupling of Anilides with Olefins through C−H Bond Activation at Room Temperature
作者:Maarten D. K. Boele、Gino P. F. van Strijdonck、André H. M. de Vries、Paul C. J. Kamer、Johannes G. de Vries、Piet W. N. M. van Leeuwen
DOI:10.1021/ja0176907
日期:2002.2.1
Using a high-throughput experimentation approach we found a selective and mild Pd-catalyzed oxidative coupling reaction between anilide derivatives and acrylates that occurs through ortho C-H bond activation. The reaction is carried out in an acidic environment and occurs even at room temperature with use of a cheap oxidant (benzoquinone) in yields up to 91%. The benzoquinone possibly also functions as a ligand, stabilizing the catalyst. From the electronic dependence of the reaction and the observed kinetic isotope effect (kH/kD = 3) the key step of the catalytic cycle is believed to be electrophilic attack by a [PdOAc]+ complex on the pi-system of the arene.
Selectfluor-mediated mono-C–H activation: The syntheses of mono-ortho-substituted anilides
The C-H activation of aryl amide using readily available Pd(OAc)(2) in the presence of selectfluor is reported. The highly mono-selective introduction of sp(2) hybridized functional groups have been realized. A broad range of aryl-, alkenyl- and keto-aryl amides were prepared using unactivated coupling partners under mild conditions. (C) 2018 Elsevier Ltd. All rights reserved.