Photoredox-Catalyzed Decarboxylative Alkylation of Silyl Enol Ethers To Synthesize Functionalized Aryl Alkyl Ketones
作者:Weiguang Kong、Changjiang Yu、Hejun An、Qiuling Song
DOI:10.1021/acs.orglett.7b03587
日期:2018.1.19
Photoredox-catalyzed decarboxylative alkylation of silylenolethers has been developed. Diverse functionalized arylalkylketones were afforded in modest to good yields using N-(acyloxy)phthalimide as an easy access alkyl radical source under mild and operationally simple conditions. The excellent performance of drug molecules such as fenbufen and indomethacin and naturally occurring carboxylic acids
The oxidative coupling of photogenerated alkyl radicals with readily available styrenes is disclosed. This visible-light-mediated method allows rapid access to a wide range of α-alkyl-acetophenones in good yields and with high functional group tolerance. In addition, the developed protocol features room temperature conditions, low photocatalyst loadings, and the use of dimethyl sulfoxide as nontoxic
Metal–Organic Framework with Dual Active Sites in Engineered Mesopores for Bioinspired Synergistic Catalysis
作者:Yangjian Quan、Yang Song、Wenjie Shi、Ziwan Xu、Justin S. Chen、Xiaomin Jiang、Cheng Wang、Wenbin Lin
DOI:10.1021/jacs.0c02966
日期:2020.5.13
strong Lewis acid and photoredox sites in engineered mesopores. Al-MOF (1) with mixed 2,2'-bipyridyl-5,5-dicarboxylate (dcbpy) and 1,4-benzenediacrylate ligands was oxidized with ozone and then tiflated to generate strongly Lewis acidic Al-OTf sites in the mesopores, followed by the installation of [Ir(ppy)2(dcbpy)]+ (ppy = 2-phenylpyridine) sites to afford 1-OTf-Ir with both Lewis acid and photoredox
Nickel‐Mediated Photoreductive Cross Coupling of Carboxylic Acid Derivatives for Ketone Synthesis**
作者:Jan Brauer、Elisabeth Quraishi、Lisa Marie Kammer、Till Opatz
DOI:10.1002/chem.202103486
日期:2021.12.23
Mediated synthesis: A strategy for the nickel-catalyzed synthesis of ketones using visible light and two carboxylic acid-derived substrates is presented. No expensive iridium catalysts are required, with eco-friendly Hantzsch ester acting as both the photosensitizer and photoreductant. A broad scope of synthesized ketones is presented along with spectroscopical and computational studies of the role