diynes were cyclized in the presence of a cationic gold catalyst and an external nucleophile leading to 1‐indenones and 1‐iminoindenones. The electron‐donating features of the nitrogen atom enable the formation of a reactive ketene iminium ion, which can be trapped by either diphenyl sulfoxide or anthranil as nucleophiles in a subsequent oxidation step, providing substituted inden‐1‐on‐3‐carboxamides
在阳离子
金催化剂和外部亲核试剂的存在下,将酰胺取代的二炔环化,生成1-
茚满和1-亚
氨基
茚满。氮原子的给电子特征使得能够形成反应性的烯酮
亚胺离子,在随后的氧化步骤中,二烯亚砜或
蒽腈可将其作为亲核试剂捕获,从而提供取代的1对3取代的
茚酰胺。