Synthesis of substituted quinolines from N-aryl-N-(2-alkynyl)toluenesulfonamides via FeCl3-mediated intramolecular cyclization and concomitant detosylation
摘要:
A series of substituted quinolines have been synthesized in moderate to good yields (55-81%) from easily available substrates N-aryl-N-(2-alkynyl)toluenesulfonamides via FeCl3-mediated intramolecular cyclization and concomitant detosylation. (C) 2012 Elsevier Ltd. All rights reserved.
Tertiary amines as a C1 synthon: metal-free synthesis of quinolines and 2-substituted quinolines <i>via</i> [3+2+1] aerobic cyclization and C–N bond cleavage
An I2-mediated [3+2+1] aerobic cyclization reaction of anilines with alkynes and tertiaryamines without any peroxides has been reported. This protocol employed tertiaryamines as a C1 building block for the direct synthesis of 2-non, 2-alkyl, and even 2-aryl substituted quinolines via C–N bond cleavage. Differing from the traditional methods, both terminal and internal alkynes were compatible in this
已经报道了在没有任何过氧化物的情况下, I 2介导的苯胺与炔烃和叔胺的 [3+2+1] 有氧环化反应。该方案采用叔胺作为 C1 结构单元,通过C-N 键断裂直接合成 2-非、2-烷基甚至 2-芳基取代的喹啉。与传统方法不同,末端和内部炔烃在这种无金属三组分体系中是相容的。2-乙烯基苯胺可能作为该过程中的一种活性中间体产生。
<i>p</i>-TSA·H<sub>2</sub>O catalyzed metal-free and environmentally benign synthesis of 4-aryl quinolines from arylamine, arylacetylene, and dimethyl sulfoxide
作者:Simra Faraz、Abu Taleb Khan
DOI:10.1039/d3ob00993a
日期:——
An environmentally benign and metal-free synthesis of 4-aryl quinolines is reported by employing readily available arylamine, arylacetylene, and DMSO in the presence of 20 mol% p-TSA·H2O. In the present protocol, the solvent DMSO serves as a reactant cum solvent for providing the C2 carbon atom of the quinoline skeleton. Notably, the reaction proceeds effectively and efficiently without the involvement