The Aminocyclodextrin/Pd(OAc)<sub>2</sub>Complex as an Efficient Catalyst for the Mizoroki-Heck Cross-Coupling Reaction
作者:Kuppusamy Kanagaraj、Kasi Pitchumani
DOI:10.1002/chem.201301863
日期:2013.10.18
An aminocyclodextrin/Pd(OAc)2 complex is used as an efficient, reusable catalyst in the Mizoroki–Heck reaction of aryl halides/triflates with olefins to give carbon–carbon‐coupled products in good to excellent yields. This simple, efficient catalytic system is applicable to a wide range of aryl and heteroaryl halides/triflates and olefins. This environmentally benign procedure is less hazardous, milder
Transforming Suzuki–Miyaura Cross-Couplings of MIDA Boronates into a Green Technology: No Organic Solvents
作者:Nicholas A. Isley、Fabrice Gallou、Bruce H. Lipshutz
DOI:10.1021/ja409663q
日期:2013.11.27
New technology has been developed that enables Suzuki-Miyaura couplings involving widely utilized MIDAboronates to be run in water as the only medium, mainly at room temperature. The protocol is such that no organic solvent is involved at any stage; from the reaction through to product isolation. Hence, using the E factor scale as a measure of greenness, the values for these cross-couplings approach
已经开发出的新技术使 Suzuki-Miyaura 联轴器包括广泛使用的 MIDA 硼酸盐,可以在作为唯一介质的水中运行,主要是在室温下。该协议在任何阶段都不涉及有机溶剂;从反应到产物分离。因此,使用 E 因子尺度作为绿色度的度量,这些交叉耦合的值接近于零。
Methanol as the Hydrogen Source in the Selective Transfer Hydrogenation of Alkynes Enabled by a Manganese Pincer Complex
作者:Jan Sklyaruk、Viktoriia Zubar、Jannik C. Borghs、Magnus Rueping
DOI:10.1021/acs.orglett.0c02151
日期:2020.8.7
The first base metal-catalyzed transfer hydrogenation of alkynes with methanol is described. An air and moisture stablemanganesepincer complex catalyzes the reduction of a variety of different alkynes to the corresponding (Z)-olefins in high yields. The reaction is stereo- and chemoselective and scalable.
and selective Pd‐catalyzed cross‐coupling of aromatic boronic acids with vinyl‐imidazoles is disclosed. Unlike most cross‐coupling reactions, this method operates well in absence of bases avoiding the formation of by‐products. The reactivity is highly enhanced by the presence of nitrogen‐based ligands, in particular bathocuproine. The method involves MnO2 as oxidant for the oxidation Pd (0)→Pd (II), a
2-Aminophenyl diphenylphosphinite as a new ligand for heterogeneous palladium-catalyzed Heck–Mizoroki reactions in water in the absence of any organic co-solvent
introduced as a new ligand for the Heck–Mizoroki reactions of aryl halides with styrene and n-butylacrylate in water in the presence of palladium acetate. This ligand is easily prepared from the reaction of chlorodiphenyl phosphine with 2-aminophenol in high yield. Pre-catalyst [Pd(OAc)2] in the presence of the ligand produces a black solid mass. The solid catalyst has been recycled for the reaction of bromobenzene