Rhodium-Catalyzed Annulation of <i>N</i>-Acetoxyacetanilide with Substituted Alkynes: Conversion of Nitroarenes to Substituted Indoles
作者:Jayanta Ghorai、Kuppan Ramachandran、Pazhamalai Anbarasan
DOI:10.1021/acs.joc.1c01604
日期:2021.11.5
nitroarenes. The important features are the introduction of N-acetoxyacetamide as a new directing group, redox-neutral annulation, an additive-free approach, wide functional group tolerance, an intramolecular version, and a one-pot reaction of nitroarenes. The method was further extended to the synthesis of potent higher analogues of indole, viz., pyrrolo[3,2-f]indoles and dibenzo[a,c]carbazoles. In addition
N-乙酰氧基乙酰苯胺的一般和有效的铑催化氧化还原中性环化,容易从硝基芳烃中获得,与炔烃已经完成,用于合成取代的吲哚衍生物。从各种取代的N-乙酰氧基乙酰苯胺和对称/不对称炔烃中获得了范围广泛的取代 2,3-二芳基吲哚,产率从良好到优异。所开发的方法成功地与N-乙酰氧基乙酰苯胺的合成相结合,用于从硝基芳烃中有效地一锅法合成吲哚。重要的特点是引入了N-乙酰氧基乙酰胺作为新的导向基团,氧化还原中性环化,无添加剂方法,广泛的官能团耐受性,分子内形式和硝基芳烃的一锅反应。该方法进一步扩展到合成有效的高级吲哚类似物,即。、吡咯并[3,2- f ]吲哚和二苯并[ a , c ]咔唑。此外,基于潜在芳基-Rh中间体的分离和化学计量研究,提出了一种合理的机制。