commercial Pd/C catalyst. The good reactivity in the biomass-derived solvent (GVL) confirms that the Pd/PiNe heterogeneouscatalyst is a valid system that can be integrated into a waste valorization chain within a circular economy approach. In addition, the efficiency of the catalyst has also been extended to perform the challenging consecutive Hiyama–Heck reaction to afford differently substituted (E)-1
A highly active catalytic system for Suzuki–Miyaura cross-coupling reactions of aryl and heteroaryl chlorides in water
作者:Shu-Lan Mao、Yue Sun、Guang-Ao Yu、Cui Zhao、Zhi-Jun Han、Jia Yuan、Xiaolei Zhu、Qihua Yang、Sheng-Hua Liu
DOI:10.1039/c2ob26463c
日期:——
An easily available Pd(OAc)2/(2-mesitylindenyl)dicyclohexylphosphine/Me(octyl)3N+Cl−/K3PO4·3H2O catalytic system was developed and it shows high catalytic activity in the Suzuki–Miyaura cross-coupling reaction of a diverse array of aryl and heteroaryl chlorides in water. Notably, this catalytic system also works with ultra-low loading of the catalyst with high turnover numbers.
容易获得的Pd(OAc)2 /(2-异丁烯基)二环己基膦/ Me的(辛基)3 Ñ +氯- / K 3 PO 4 ·3H 2 ö催化体系被开发,它示出了在芳基和杂芳基氯化物的多样性阵列的Suzuki-Miyaura交叉偶联反应的高催化活性水。值得注意的是,该催化系统还可以在超低负荷下以高周转数运行。
Sustainable Ligand‐Free, Palladium‐Catalyzed Suzuki–Miyaura Reactions in Water: Insights into the Role of Base
to acting as a base during the catalytic process. In the catalyticsystem with a strong base, the soluble active PdII ion exhibited anti-reduction properties, which prevented aggregation and deactivation of Pd species. The entire catalyticsystem could be recycled after separating the product by simple filtration. The water-compatible and air-stable effective catalytic protocol described herein represents
Ligand-free palladium acetate and palladium chloride have been evaluated as catalysts in the Suzukicross-coupling of aryl boronic acid with aryl and vinyl bromide in ethanol at room temperature and with exposure to air. The substrates with a wide variety of functional groups, including base-sensitive ones are tolerated.
Cross-Coupling of Aryllithiums with Aryl and Vinyl Halides in Flow Microreactors
作者:Aiichiro Nagaki、Yuya Moriwaki、Suguru Haraki、Akira Kenmoku、Naofumi Takabayashi、Atsushi Hayashi、Jun-Ichi Yoshida
DOI:10.1002/asia.201101019
日期:2012.5
speeded up the Murahashicoupling of ArLi with ArBr, by enabling its integration with the Br/Li exchange of ArBr with BuLi in flow. Spaceintegration realized the rapid cross‐coupling of two different ArBr substrates. However, the cross‐coupling reaction with vinyl halides could not be achieved under similar conditions. Pd(OAc)2 was an effective catalyst, and the spaceintegration of the Br/Li exchange