Esterification of Carboxylic Acids with Aryl Halides via the Merger of Paired Electrolysis and Nickel Catalysis
作者:Lei Wei、Zhen-Hua Wang、Ke-Jin Jiao、Dong Liu、Cong Ma、Ping Fang、Tian-Sheng Mei
DOI:10.1021/acs.joc.1c00204
日期:2021.11.19
sacrificial reaction occurs at the counter electrode. Pairedelectrolysis merging with metal catalysis is underdeveloped, wherein both anodic and cathodic processes are taking place simultaneously. Herein, we demonstrated that by using esterification of carboxylic acids with arylhalidesviapairedelectrolysis using nickel as the catalyst the respective aryl esters were obtained in good to excellent yields
Coupling of Alternating Current to Transition-Metal Catalysis: Examples of Nickel-Catalyzed Cross-Coupling
作者:Evgeniy O. Bortnikov、Sergey N. Semenov
DOI:10.1021/acs.joc.0c02350
日期:2021.1.1
higher yields and selectivity compared to that observed in the control experiments with direct current. Our mechanistic studies suggested the importance of both reduction and oxidation processes in the maintenance of the AC-assisted catalyticreactions. As described in presented examples, the AC assistance should be well-suited for catalytic cycles involving reductive elimination or oxidative addition
Carbon dots have been immobilized on titanium dioxide to generate photocatalysts for metallaphotocatalytic carbon–heteroatom cross-couplings.
碳点已被固定在二氧化钛上,用于生成用于金属光催化碳-杂原子交叉偶联的光催化剂。
Evidence for Photocatalyst Involvement in Oxidative Additions of Nickel-Catalyzed Carboxylate <i>O</i>-Arylations
作者:Jamal A. Malik、Amiera Madani、Bartholomäus Pieber、Peter H. Seeberger
DOI:10.1021/jacs.0c02848
日期:2020.6.24
Experimental conditions were adjusted such that the nickel catalytic cycle is saturated with excited photocatalyst. This approach was designed to remove the role of the photocatalyst, by which only the intrinsic behaviors of the nickel catalytic cycles are observed. The two reactions did not display identical kinetics. Ir(ppy)3 deactivates the nickel catalytic cycle and creates more dehalogenated side product
Streamlined Synthesis of Aminoacridinium Photocatalysts with Improved Photostability
作者:Markus Jakobi、Christof Sparr
DOI:10.1021/acs.oprd.2c00209
日期:2022.9.16
1,5,5′-trifunctional organometallic reagents enables the coupling and cyclization with simple esters, whereas a third unreacted functionality is hydrolyzed upon acidic quench. This short reaction sequence results in bis(diarylamino)acridiniums with dramatically increased photostability, allowing us to lower the catalyst loading to 0.10 mol % without loss in yield.