Palladium-Catalyzed Dual Ligand-Enabled Alkylation of Silyl Enol Ether and Enamide under Irradiation: Scope, Mechanism, and Theoretical Elucidation of Hybrid Alkyl Pd(I)-Radical Species
作者:Bin Zhao、Rui Shang、Guang-Zu Wang、Shaohong Wang、Hui Chen、Yao Fu
DOI:10.1021/acscatal.9b04699
日期:2020.1.17
dual ligand effect and the irradiation effect in the catalytic cycle. The reaction is suggested to proceed via a hybrid alkyl Pd(I)-radical species generated by inner-sphere electron transfer of phosphine-coordinated Pd(0) species with alkyl bromide. This intriguing hybrid alkyl Pd(I)-radical species is elucidated by theoretical calculation to be a triplet species coordinated by three phosphine atoms
Nickel-catalyzed three-component olefin reductive dicarbofunctionalization to access alkylborates
作者:Xiao-Xu Wang、Xi Lu、Shi-Jiang He、Yao Fu
DOI:10.1039/d0sc02054k
日期:——
We report a three-component olefin reductive dicarbofunctionalization for constructing alkylborates, specifically, nickel-catalyzed reductive dialkylation and alkylarylation of vinyl boronates with a variety of alkyl bromides and aryl iodides. This reaction exhibits good coupling efficiency and excellent functional group compatibility, providing convenient access to the late-stage modification of complex
A Copper(I)-Catalyzed Radical-Relay Reaction Enabling the Intermolecular 1,2-Alkylborylation of Unactivated Olefins
作者:Sota Akiyama、Natsuki Oyama、Tsubura Endo、Koji Kubota、Hajime Ito
DOI:10.1021/jacs.1c02050
日期:2021.4.7
2-alkylborylation reaction via a radical-relay mechanism between unactivated olefins, bis(pinacolato)diboron, and an alkyl electrophile is reported. Successful implementation of this method requires that the competing boryl substitution of the alkyl electrophile is retarded to facilitate the radical relay. This challenge was overcome using electronically or sterically demanding alkyl electrophiles, which results