bis-quinoline-2-carboxylic acid copper salt as a single crystal was prepared and characterized by X-ray single crystal analysis. The crystal as a catalyst was applied to the Mizoroki–Heck coupling reaction between arylboronic acids and α-olefins. A series of diarylethenes and aryl olefins were synthesized with good to excellent yields at room temperature. The catalytic system exhibited good functional group tolerance
3-pyridyl, 1-naphenyl, and 2-naphenyl) for the synthesis of (2-hydroxyphenyl)(fused phenyl)methanones in EtOH under an Ar atmosphere at roomtemperature has been developed. The described method proceeded smoothly without requiring any transition metalcatalyst, oxidant, or additives. Moreover, using ethanol as the solvent is not only cost efficient but also environmentally friendly. Further treatment
The Catellani reaction provides a facile and efficient method for the synthesis of multifunctionalized arenes. However, the use of Pd(0) catalysts restricts the scope of accessible products. We have developed a Pd(II)-catalyzed, Catellani-type reaction utilizing arylboronic acids as the substrates for the first time. The arylboronic acids can be mono- or dialkylated at the ortho positions with alkyl
Palladium supported on aminopropyl-functionalized polymethylsiloxane microspheres: Simple and effective catalyst for the Suzuki–Miyaura C–C coupling
作者:Wojciech Zawartka、Piotr Pośpiech、Marek Cypryk、Anna M. Trzeciak
DOI:10.1016/j.molcata.2015.07.002
日期:2015.10
A palladium catalyst, obtained in the reaction of PdCl2(MeCN)(2) with microspheric aminopropyl polymethylsiloxane, was used in the Suzuki Miyaura cross-coupling of various aryl bromides with phenylboronic acids. Catalytic reactions, performed at 80 degrees C in a 2-propanol/water mixture, led to high yields of non-symmetric biphenyls. In recycling experiments, excellent results (up to 100%) were obtained in ten subsequent runs. Efficient separation of the catalyst from organic products was achieved by simple filtration due to the properties of microspheres. (C) 2015 Elsevier B.V. All rights reserved.