The Copper-Catalyzed Reaction of 2-(1-Hydroxyprop-2-yn-1-yl)phenols with Sulfonyl Azides Leading to C3-Unsubstituted <i>N</i>-Sulfonyl-2-iminocoumarins
作者:Yu Zhao、Zitong Zhou、Lvling Liu、Man Chen、Weiguang Yang、Qi Chen、Michael G. Gardiner、Martin G. Banwell
DOI:10.1021/acs.joc.1c00331
日期:2021.7.2
achieved by reacting 2-(1-hydroxyprop-2-yn-1-yl)phenols (e.g., 6a) with sulfonyl azides (e.g., 7a). The cascade process involved likely starts with a copper-catalyzed alkyne–azide cycloaddition (CuAAC) reaction. This is followed by ring-opening of the resulting metalated triazole (with accompanying loss of nitrogen), reaction of the ensuing ketenimine with the pendant phenolic hydroxyl group, and finally
Z-构型和 C3-未取代的N-磺酰基-2-亚氨基香豆素(例如,8a)的操作简单合成,在温和条件下进行,是通过 2-(1-羟基丙基-2-yn-1-基)苯酚反应实现的(例如,6a )与磺酰叠氮化物(例如,7a )。所涉及的级联过程可能始于铜催化的炔烃-叠氮化物环加成 (CuAAC) 反应。随后是所得金属化三唑的开环(伴随着氮的损失),随后的烯酮亚胺与酚羟基侧基反应,最后(Z)-N-(4-羟基色满-2- )脱水亚基)磺酰胺如此形成。