Iron-Catalyzed Denitrogenative Annulation Reactions between α-Azido Acetamides and Cyclic Ketones
作者:Siyu Liang、Yuxin Zhou、Wei Yu
DOI:10.1021/acs.orglett.3c03883
日期:2024.1.26
FeCl2-catalyzed annulation reaction between α-azido acetamides and cyclic ketones. Two types of α,β-unsaturated γ-lactam products can be obtained, depending on the reaction conditions. When α-azido acetamides were reacted with cyclohexanone, 8-amino-5,6,7,8-tetrahydro-1H-indol-2(4H)-ones were obtained when a primary amine was present in the reaction system; conducting the reaction in the presence of 2-
我们报道了 FeCl 2催化的 α-叠氮基乙酰胺和环酮之间的成环反应。根据反应条件,可以获得两种类型的α,β-不饱和γ-内酰胺产物。 α-叠氮基乙酰胺与环己酮反应,当反应体系中存在伯胺时,得到8-氨基-5,6,7,8-四氢-1H-吲哚-2( 4H )-酮;相反,在2-氨基苯磺酸存在下进行该反应,导致形成5,6-二氢-1H-吲哚-2( 4H )-酮。环庚酮和环辛酮的反应方式与环己酮相同。该反应通过 2-亚氨基乙酰胺中间体进行,2-亚氨基乙酰胺是通过 FeCl 2促进 α-叠氮基乙酰胺的二氮化形成的。这些反应构成了扩大有机叠氮化物合成尺寸的新策略。