A Facile Two-Step Synthesis of 2-Arylbenzofurans Based on the Selective Cross McMurry Couplings
作者:Xin-Fang Duan、Jing Zeng、Zhan-Bin Zhang、Guo-Fu Zi
DOI:10.1021/jo7019652
日期:2007.12.1
[GRAPHICS]A novel two-step synthesis of 2-arylbenzofurans has been developed. It involves a selective cross McMurry coupling of a salicylaldehyde or substituted salicylaldehyde with an aromatic aldehyde and a sequential oxidative cyclization of the resulting ortho-vinylphenols. Utilizing this synthetic protocol, a variety of 2-arylbenzofurans including cicerfuran (5) have been efficiently synthesized.
One-Step Synthesis of Substituted Benzofurans from <i>ortho</i>
- Alkenylphenols <i>via</i>
Palladium-Catalyzed CH Functionalization
作者:Dejun Yang、Yifei Zhu、Na Yang、Qiangqiang Jiang、Renhua Liu
DOI:10.1002/adsc.201600082
日期:2016.6.2
A dehydrogenative oxygenation of C(sp2)H bonds with intramolecular phenolic hydroxy groups has been developed, which provides a straightforward and concise access to structurally diversely benzofuransfrom ortho‐alkenylphenols. The reaction is catalyzed by palladium on carbon (Pd/C) without any oxidants and sacrificing hydrogen acceptors.