Unexpected and Divergent Reactions of N-Formyl-1,2-dihydroquinolines with Sodium Azide: Highly Chemoselective Formation of 2-Substituted Quinolines and Isoxazolo[4,3-c]quinolines
The Vilsmeier cyclization of 2′-azido and 2′-aminochalcones—a mild one pot synthesis of 2-aryl-4-chloroquinoline and its N -formyl-1,2-dihydro derivatives
摘要:
The Vilsmeier cyclization of 2'-aminochalcones provides a mild one pot synthesis of 2-aryl-4-chloro-N-formyl-1,2-dihydroquinolines. The scope of the reaction has been extended for the synthesis of quinolines themselves, by replacing 2'-aminochalcones with 2'-azidochalcones as the starting material. The yields are reasonably good and a plausible mechanism for the formation of the products in each case has been discussed. (C) 2001 Elsevier Science Ltd. All rights reserved.
Synthesis of 2,4-Diarylquinolines: Nickel-Catalysed Ligand-Free Cross-Couplings of 4-Chloro-2-Arylquinolines with Arylmagnesium Halides in 2-Methyltetrahydrofuran
作者:Zhenhua Li、Lingmin Xu、Weike Su
DOI:10.3184/174751911x13026226423986
日期:2011.4
A ligand-free and room temperature protocol for the synthesis of 2,4-diarylquinolines is described. Treatment of 4-chloro-2-arylquinolines with arylmagnesiumhalides in the presence of a catalytic amount of nickel(II) chloride without ligands in 2-methyltetrahydrofuran (2-MeTHF) afforded the corresponding cross-coupling products in good yields.
描述了用于合成 2,4-二芳基喹啉的无配体和室温协议。在催化量的氯化镍 (II) 存在下,在 2-甲基四氢呋喃 (2-MeTHF) 中没有配体的情况下,用芳基卤化镁处理 4-氯-2-芳基喹啉,以良好的产率得到相应的交叉偶联产物。
A novel one‐pot oxidative deformylation of
<i>N</i>
‐formyldihydroquinolines employing ferric chloride hexahydrate. Synthesis of 4‐chloro‐2‐phenylquinolines and 4‐chloro‐2‐(1,3‐diphenyl‐1
<i>H</i>
‐pyrazol‐4‐yl)quinolines
作者:Kalvi. Hemanth Kumar、Paramasivan. T. Perumal
DOI:10.1002/jhet.5570450248
日期:2008.3
Abstractmagnified imageA novel versatile one‐pot oxidative deformylation approach has been developed to synthesize 4‐chloro‐2‐phenylquinolines and 4‐chloro‐2‐(1,3‐diphenyl‐1H‐pyrazol‐4‐yl)quinolines from the corresponding N‐formyldihydroquinolines.
Intramolecular Cyclization of 2′-Aminochalcones by Halomethyleniminium Salts Derived from BTC/DMF