Photopromoted Entry to Benzothiophenes, Benzoselenophenes, 3<i>H</i>-Indoles, Isocoumarins, Benzosultams, and (Thio)flavones by Gold-Catalyzed Arylative Heterocyclization of Alkynes
作者:Benito Alcaide、Pedro Almendros、Eduardo Busto、Fernando Herrera、Carlos Lázaro-Milla、Amparo Luna
DOI:10.1002/adsc.201700427
日期:2017.8.7
gold‐photoredox‐catalyzed reactions of heteroatom (N, S, Se, O) tethered alkynes with arenediazonium salts selectively proceeded to build vicinal diaryl‐substituted 2H‐benzo[e][1,2]thiazine 1,1‐dioxides (benzosultams), benzoselenophenes, benzothiophenes, 4H‐chromen‐4‐ones (flavones), 3H‐indoles, 1H‐isochromen‐1‐ones (isocoumarins), and 4H‐thiochromen‐4‐ones (thioflavones). Moreover, the utility of functionalized
杂原子(N,S,Se,O)链炔烃与烯二唑鎓盐的可见光促进和金光氧化还原催化反应选择性地进行,以建立邻二芳基取代的2 H苯并[ e ] [1,2]噻嗪1, 1-二氧化物(苯并舒马坦),苯并硒吩,苯并噻吩,4 H-铬4-1-酮(黄酮),3 H-吲哚,1 H-异铬1-1-1(异香豆素)和4 H-硫代色素4–1(硫代黄酮)。此外,功能化的3 H吲哚作为前体进一步加工的实用性已通过1 H吲哚,2-吲哚和3 oxindolines的可切换且简便的制备方法得到了证明。