Enamines undergo α-indolization with ammonium salts in the presence of Et3N to form α-indolylketones. This is the first example of transition metal-, oxidant-, and fluorous solvent-free α-indolization of ketones. Key to the success of this convenient protocol was the use of in situ generated electrophilic indole species, as well as the use of enamines as a ketone enolate equivalent.
烯胺在Et 3 N存在下与
铵盐进行α-
吲哚化反应以形成α-
吲哚基酮。这是酮的无过渡
金属,无氧化剂和无
氟溶剂的α-
吲哚化的第一个例子。成功实现此便捷协议的关键是使用原位生成的亲电子
吲哚物种,以及使用烯胺作为酮烯醇酸酯等效物。