<scp>Nickel‐Catalyzed</scp>Reductive Coupling of Aldehydes with Alkynes Mediated by Alcohol<sup>†</sup>
作者:Yan‐Long Zheng、Mengchun Ye
DOI:10.1002/cjoc.201900543
日期:2020.5
A nickel‐catalyzed reductive coupling of aldehydes with alkynes using 1‐phenylethanol as reducing agent has been developed. The key achievement of this work is that we demonstrate environmentally benign 1‐phenylethanol can serve as a viable alternative reducing agent to Et3B, ZnEt2 and R3SiH for the nickel‐catalyzed reductive coupling reaction of aldehyde and alkynes.
We have developed a redox-economical coupling reaction of alcohols and alkynes to form allylic alcohols under mild conditions. The reaction is redox-neutral as well as redox-economical and thus free from any additives such as a reductant or an oxidant. This atom-economical coupling can be applied for the conversion of both aliphatic and benzylic alcohols to the corresponding substituted allylic alcohols in a single synthetic operation.
Reactive Dicarbon as a Flexible Ligand for Transition-Metal Coordination and Catalysis
作者:Ming-Chun Wu、Yu-Fu Liang、Titel Jurca、Glenn P. A. Yap、Tsz-Fai Leung、Tiow-Gan Ong
DOI:10.1021/jacs.2c05486
日期:2022.7.20
these molecules as a new complementary class of carbene-like ligands featuring strong σ-donor (>NHCs and CAAcs) but weak π-acceptor properties. Steric map analysis of PDC based on Cavallo’s SambVca program reveals comparable steric volume bulk of 32.5%, similar to the conventional IMes carbene. However, our PDCs exhibit dynamic steric flexibility modulated by the nature of the metal complexes and catalytic