Silver‐Catalyzed Nitration/Annulation of α‐Alkynyl Arylols toward 3‐Nitrated Benzofurans
作者:Tian‐Shu Zhang、Lei Yang、Pei‐Jun Cai、Shu‐Jiang Tu、Bo Jiang
DOI:10.1002/asia.201901400
日期:2019.12.2
silver-catalyzed nitration/annulation of α-alkynyl arylols is reported by using tert-butyl nitrite (TBN) as a NO2 radical precursor, from which a set of 3-nitrated benzofurans were synthesized with moderate to good yields. This transformation initiated by an in situ generated NO2 radical proceeds efficiently under mild and neutral redox conditions, which provides a new pathway toward the 3-nitrobenzofuran
据报道,使用亚硝酸叔丁酯(TBN)作为NO2自由基前体,银催化了α-炔基芳醇的硝化/环化反应,从中合成了一组3-硝化的苯并呋喃,收率中等至良好。由原位产生的NO2自由基引发的这种转化在温和和中性的氧化还原条件下有效地进行,这通过内部炔烃的催化双官能化为3-硝基苯并呋喃骨架提供了一条新途径。