Acyl Radicals from α-Keto Acids Using a Carbonyl Photocatalyst: Photoredox-Catalyzed Synthesis of Ketones
作者:Da-Liang Zhu、Qi Wu、David James Young、Hao Wang、Zhi-Gang Ren、Hong-Xi Li
DOI:10.1021/acs.orglett.0c02351
日期:2020.9.4
Acylradicals have been generated from α-keto acids using inexpensive and commercially available 2-chloro-thioxanthen-9-one as the photoredox catalyst under visible light illumination. These reactive species added to olefins or coupled with aryl halides via a bipyridyl-stabilized Ni(II) catalyst, enabling easy access to a diverse range of ketones. This reliable, atom-economical, and eco-friendly protocol
KCC-1 supported palladium nanoparticles as an efficient and sustainable nanocatalyst for carbonylative Suzuki–Miyaura cross-coupling
作者:Prashant Gautam、Mahak Dhiman、Vivek Polshettiwar、Bhalchandra M. Bhanage
DOI:10.1039/c6gc02012g
日期:——
This work reports a cost-effective and sustainable protocol for the carbonylative Suzuki-Miyauracross-coupling reaction catalyzed by palladium nanoparticles (Pd NPs) supported on fibrous nanosilica (KCC-1) with very high turnover number.
New Synthesis of Biaryls<i>via</i>Rh-Catalyzed Decarbonylative Suzuki-Coupling of Carboxylic Anhydrides with Arylboroxines
作者:L. J. Gooßen、J. Paetzold
DOI:10.1002/adsc.200404190
日期:2004.12
cross-coupling of aromatic carboxylicanhydrides or acid chlorides with triarylboroxines has been achieved for the first time under decarbonylation, giving rise to the unsymmetrical biaryls rather than the expected diaryl ketones. This newdecarbonylative Suzuki coupling, catalyzed by a [Rh(ethylene)2Cl]2/KF system, can be applied to aromatic, heteroaromatic and vinylic carboxylicanhydrides, potentially opening
Palladacycle-Catalyzed Carbonylative Suzuki–Miyaura Coupling with High Turnover Number and Turnover Frequency
作者:Prashant Gautam、Bhalchandra M. Bhanage
DOI:10.1021/acs.joc.5b01160
日期:2015.8.7
This work reports the carbonylative Suzuki Miyaura coupling of aryl iodides catalyzed by- palladacydes. More importantly, the palladacydes have been used to generate high turnover numbers (TON's) and turnover frequencies (TOF's). A range of aryl iodides can be coupled with arylboronic acids, generating TON's in the range of 106 to 10 and TOF's in the range of 10(5) to 10(6) Comparison of the palladacydes with a conventional palladium source shows their superiority in generating high TON's and TOF's.