Nickel/N-Heterocyclic Carbene Complex-Catalyzed Enantioselective Redox-Neutral Coupling of Benzyl Alcohols and Alkynes to Allylic Alcohols
作者:Yuan Cai、Jia-Wen Zhang、Feng Li、Jia-Ming Liu、Shi-Liang Shi
DOI:10.1021/acscatal.8b04198
日期:2019.1.4
The nickel-catalyzed enantioselective redox-neutral coupling of alcohols and alkynes to access chiral allylic alcohols is reported. The reaction proceeds via a hydrogen transfer process under ambient temperature, converting abundant feedstock alcohols and alkynes to chiral allylic alcohols with high stereoselectivities in one chemical step. Key to the success of this process was the development of
<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.
Reaction of 3-zircona-1-cyclopentenes and zirconacyclopentanes with aldehydes. A selective and convenient synthesis of 4-penten-1-ols, (Z)-5-iodo-4-penten-1-ols, and related alkanols
3-Zircona-1-cyclopentenes and zirconacyclopentanes react with aldehydes at or below 25 °C to give the corresponding carbonyl addition products, i.e., 7-membered oxazirconacycles, which can be readily converted to the corresponding alcohols via protonolysis and 5-iodoalcohols via iodinolysis; the latter product can be further converted to 7-membered lactones via Pd-catalyzed carbonylation.
Studies on the zirconium-mediated alkyne–aldehyde coupling reactions: a facile synthesis of stereodefined allylic alcohols and (Z)-2-en-4-yn-1-ols
作者:Shenghai Guo、Hao Zhang、Feijie Song、Yuanhong Liu
DOI:10.1016/j.tet.2006.12.051
日期:2007.2
An improved zirconium-mediated alkyne–aldehyde cross-coupling reaction has been achieved to afford the stereodefined (Z)-allylic alcohols or 3-iodinated allylicalcoholsselectively via protonolysis or iodinolysis of the corresponding five-membered oxazirconacycles. This method has also been successfully applied to the synthesis of (Z)-enynols through cross-coupling reactions of three different components
Gold-Catalyzed Direct Amination of Allylic Alcohols
作者:Yuanhong Liu、Shenghai Guo、Feijie Song
DOI:10.1055/s-2007-973865
日期:2007.4
An efficient and direct synthesis of allylic amines from allylic alcohols was developed by utilization of gold complexes as catalysts under mild reaction conditions. AuCl 3 proved to be a better catalyst than a cationic gold(I) complex of AuCl(PPh 3 )/AgOTf.