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
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