Visible light induced tandem reactions: An efficient one pot strategy for constructing quinazolinones using in-situ formed aldehydes under photocatalyst-free and room-temperature conditions
作者:Zongbo Xie、Jin Lan、Haibo Zhu、Gaoyi Lei、Guofang Jiang、Zhanggao Le
DOI:10.1016/j.cclet.2020.09.059
日期:2021.4
aminobenzamides and in-situ generated aldehydes. Visible light was found to play a dual role: first oxidizes the alcohol to the aldehyde and then facilitates its cyclization with o-substituted aniline. Furthermore, alcohols are perfect alternatives to aldehydes because they are greener, more available, more economical, more stable, and less toxic than aldehydes. The first reaction step continuously
已经开发了一种从各种氨基苯甲酰胺和原位生成的醛构建喹唑啉酮的简便串联途径。发现可见光起着双重作用:首先将醇氧化成醛,然后促进其与邻苯二甲酸的环化。取代的苯胺。此外,醇是醛的完美替代品,因为它们比醛更绿色,更易得,更经济,更稳定且毒性更低。第一反应步骤连续地为第二步骤提供材料,该材料有效地减少了由于醛的挥发,氧化和聚合而造成的损失,同时避免了其毒性。可以在可见光存在下制备各种喹唑啉酮,而无需任何其他光催化剂。发达的合成方案具有温和条件,广泛的底物范围,操作简便和高原子效率的优点,并在无金属,无光催化剂和环境条件下具有生态能源。