Efficient Palladium(0) supported on reduced graphene oxide for selective oxidation of olefins using graphene oxide as a ‘solid weak acid’
作者:Xi Gao、Jianhao Zhou、Xinhua Peng
DOI:10.1016/j.catcom.2019.01.020
日期:2019.3
Selective oxidation of olefin derivatives to ketones has made innovative development over palladium(0) supported on reduced graphene oxide. Compared to traditional Wacker oxidation, the novel method offers an economical and environment-friendly option by using graphene oxide (GO) as a ‘solid weak acid’ instead of classical homogeneous catalysts like H2SO4 and CF3COOH. X-ray diffraction, X-ray photoelectron
烯烃衍生物选择性氧化为酮的方法已在还原性氧化石墨烯上负载的钯(0)上取得了创新性的发展。与传统的Wacker氧化相比,该新方法通过使用氧化石墨烯(GO)作为“固体弱酸”,而不是像H 2 SO 4和CF 3 COOH这样的经典均相催化剂,提供了一种经济且环保的选择。Pd 0 / RGO的X射线衍射,X射线光电子能谱,扫描电子显微镜和透射电子显微镜图像表明,在还原的氧化石墨烯的薄片结构上产生了纳米级的Pd颗粒。在最佳条件下,最多可以制备44种结构不同的酮,并具有优异的收率。
A new synthesis of functionally, substituted hydroquinones
作者:G.W. Kabalka
DOI:10.1016/0040-4020(73)80094-8
日期:1973.1
Functionallysubstituted organoboranes readily react with p-benzoquinone yielding the corresponding functionallysubstitutedhydroquinones in essentially quantitative yields.
Ni-Catalyzed Carboxylation of Aziridines en Route to β-Amino Acids
作者:Jacob Davies、Daniel Janssen-Müller、Dmitry P. Zimin、Craig S. Day、Tomoyuki Yanagi、Jonas Elfert、Ruben Martin
DOI:10.1021/jacs.1c01916
日期:2021.4.7
pressure is disclosed. The protocol is characterized by its mild conditions, experimental ease, and exquisite chemo- and regioselectivity pattern, thus unlocking a new catalytic blueprint to access β-aminoacids, important building blocks with considerable potential as peptidomimetics.
Synthesis of Isomerically Pure (<i>Z</i>)-Alkenes from Terminal Alkynes and Terminal Alkenes: Silver-Catalyzed Hydroalkylation of Alkynes
作者:Mitchell T. Lee、Madison B. Goodstein、Gojko Lalic
DOI:10.1021/jacs.9b09336
日期:2019.10.30
molecules and often are used as intermediates in organic synthesis. Many alkenes exist in two stereoisomeric forms (E and Z), which have different structures and different properties. The selective formation of the two isomers is an important synthetic goal that has long inspired the development of new synthetic methods. However, the efficient synthesis of diastereopure, thermodynamically less stable, Z-alkenes
The three‐component free‐radical carbo‐alkenylation of electron‐richolefins has been studied, varying the substitution pattern in the alkene, in the radical precursor and in the final acceptor. New vinylsulfones were also prepared and their reactivity investigated. The scope and limitations of the process was established, and the reaction mechanism clarified using selected dienes as radical clocks