Synthesis of Highly Substituted 3-Formylfurans by a Gold(I)-Catalyzed Oxidation/1,2-Alkynyl Migration/Cyclization Cascade
作者:Tao Wang、Shuai Shi、Max M. Hansmann、Eva Rettenmeier、Matthias Rudolph、A. Stephen K. Hashmi
DOI:10.1002/anie.201310146
日期:2014.4.1
3‐Formylfuran derivatives are core structures of a variety of bioactive natural products. However, procedures for their preparation are still rare and generally inefficient in terms of atom economy: These methods require multiple steps or harsh reaction conditions and show selectivity problems. An efficient gold(I)‐catalyzed cascade reaction that leads to 3‐formylfurans from easily accessible starting
Pd/Cu-catalyzed cascade Sonogashira coupling/cyclization reactions to highly substituted 3-formyl furans
作者:Jingyu Yang、Chengyu Wang、Xin Xie、Hongfeng Li、Ende Li、Yanzhong Li
DOI:10.1039/c0ob00985g
日期:——
An efficient palladium/copper-catalyzed approach to the synthesis of highlysubstituted 3-formyl furans from the reactions of readily available α-bromoenaminones with terminal alkynes has been developed. This methodology was realized by the cascadereactions of Sonogashira coupling and the subsequent intramolecular cyclization.
Recyclable gold(I)-catalyzed oxidative cyclization of 1,4-diyn-3-ols leading to highly substituted 3-formylfurans
作者:Xiaoqiang Xiao、Siqi Liu、Mingzhong Cai
DOI:10.1016/j.jorganchem.2022.122527
日期:2022.12
An efficient heterogeneous gold(I)-catalyzed cascade oxidation/1,2-alkynyl migration/cyclization reaction of 1,4-diyn-3-ols has been developed. The reaction proceeds effectively in toluene at room temperature by using 3 mol% of MCM-41-anchored sterically demanding NHC-gold(I) complex [MCM-41-IPrAuOTf] as catalyst and 3,5-dichloropyridine N-oxide as oxidant and offers a general and practical route for
By the design of suitable starting materials, a silver(I)‐catalyzed epoxide ring‐opening/1,2‐acylmigration/cyclization cascade has been developed, which allowed us to systematically prepare unsymmetrical 3‐formylfurans. Various 3‐formylfurans were prepared in good to excellent yields. In addition, the distinct fluorescence properties of 3‐formylfurans in solution and the solid state are disclosed