Zwitterionic Palladium Complexes: Room-Temperature Suzuki–Miyaura Cross-Coupling of Sterically Hindered Substrates in an Aqueous Medium
作者:Jhen-Yi Lee、Dabalina Ghosh、Jing-Yi Lee、Shih-Sheng Wu、Ching-Han Hu、Shuang-De Liu、Hon Man Lee
DOI:10.1021/om500834y
日期:2014.11.24
charge on the ligand ancillary. The pyridine ligand in the zwitterionic complexes can be facilely replaced by phosphine ligands. Seven of these newcomplexes were successfully characterized by X-ray crystallography. The zwitterionic phosphine complexes were highly efficient in catalyzing room-temperature Suzuki–Miyaura reactions between sterically hindered aryl chlorides and arylboronic acids in an aqueous
Regiocontroled Palladium-Catalysed Direct Arylation at Carbon C2 of Benzofurans using Benzenesulfonyl Chlorides as the Coupling Partners
作者:Lenka Loukotova、Kedong Yuan、Henri Doucet
DOI:10.1002/cctc.201301077
日期:2014.3.10
products together with C2,C3 diarylation products. We found that the use of benzenesulfonylchlorides instead of aryl halides as the coupling partner allows for controlling the regioselectivity of the palladium‐catalysed arylation of benzofurans in favour of carbon C2. This method tolerates a variety of substituents on the benzenesulfonyl derivative.
Visible light mediated desilylative C(sp<sup>2</sup>)–C(sp<sup>2</sup>) cross-coupling reactions of arylsilanes with aryldiazonium salts under Au(<scp>i</scp>)/Au(<scp>iii</scp>) catalysis
作者:Indradweep Chakrabarty、Manjur O. Akram、Suprakash Biswas、Nitin T. Patil
DOI:10.1039/c8cc03925a
日期:——
Desilylative C(sp2)–C(sp2) cross-coupling reactions of arylsilanes with aryldiazonium salts under Au(I)/photoredox catalysis have been reported. The addition of Cu-salts as catalysts was found to be crucial for the success of this transformation.
A new, <i>substituted</i> palladacycle for ppm level Pd-catalyzed Suzuki–Miyaura cross couplings in water
作者:Balaram S. Takale、Ruchita R. Thakore、Sachin Handa、Fabrice Gallou、John Reilly、Bruce H. Lipshutz
DOI:10.1039/c9sc02528f
日期:——
an aqueous micellar medium, enabling valued Suzuki–Miyaura couplings to be run not only in water under mild conditions, but at 300 ppm of Pd catalyst. This general methodology has been applied to several targets in the pharmaceutical area. Multiple recyclings of the aqueous reaction mixture involving both the same as well as different coupling partners is demonstrated. Low temperature microscopy (cryo-TEM)
A rhodium(iii)-catalyzed oxidative C–H/C–H cross-coupling of benzimidates with various heteroarenes has been devloped to directly furnish biheteroaryl-2-carbonitriles.