通过分子内Vilsmeier-Haack反应合成了一系列4-取代的5,6,7,9-四氢吡咯并[2,3- f ]吲哚并9-ones,它们代表ugibohlin,isophakellin和styloguanidine的三环核心骨架。 。该反应使N -[(吡咯-2-基)羰基]脯氨酰胺的吡咯C3和脯氨酸C5之间形成化学选择性C–C键,从而在没有保护吡咯氮的情况下构建B环。观察到三环核心骨架的意外的氧化性质,这可能有助于理解这些海洋次级代谢产物的生物学形成。
Copper-Catalyzed Amidation of Acids Using Formamides as the Amine Source
作者:Ye-Xiang Xie、Ren-Jie Song、Xu-Heng Yang、Jian-Nan Xiang、Jin-Heng Li
DOI:10.1002/ejoc.201300543
日期:2013.9
Copper-catalyzedamidation of acids with formamides or acetamide for the selective synthesis of amides with the aid of 1,4-diazabicyclo[2.2.2]octane as the ligand and tert-butyl hydroperoxide as the oxidant is presented. This method is highly compatible with a wide range of acids, including alkyl acids, aryl acids, α,β-unsaturated acids, and amino acids.