Iodine-mediated one-pot synthesis of indoles and 3-dimethylaminoindoles via annulation of enaminones
作者:Alberto V. Jerezano、Ehecatl M. Labarrios、Fabiola E. Jiménez、María del Carmen Cruz、Diana C. Pazos、Rsuini U. Gutiérrez、Francisco Delgado、Joaquín Tamariz
DOI:10.3998/ark.5550190.p008.138
日期:——
The synthesis of 2-carbonylindoles was achieved via a iodine-mediated cyclization of the corresponding enaminone precursors, which were form ed by reaction of the α-arylaminomethylene carbonyl derivatives with N,N′-dimethylformamide dimethyl acetal (DMFDMA). An alternative and more efficient procedure consisted of a similar cyclization of the enaminones, but under solvent-free and grinding reaction
2-羰基吲哚的合成是通过相应烯胺酮前体的碘介导环化来实现的,该前体是通过α-芳基氨基亚甲基羰基衍生物与N,N'-二甲基甲酰胺二甲基乙缩醛(DMFDMA)反应形成的。另一种更有效的方法包括烯胺酮的类似环化,但在无溶剂和研磨反应条件下。在另一个碘促进的过程中,通过 α-芳基氨基亚甲基羰基衍生物和 DMFDMA 之间的一锅级联反应合成了 2-羰基-3-二甲基氨基吲哚。