PEG-400 as a carbon synthon: highly selective synthesis of quinolines and methylquinolines under metal-free conditions
作者:Chengcheng Ding、Shichen Li、Kaili Feng、Chen Ma
DOI:10.1039/d1gc01617b
日期:——
The remarkable feature of this work was using green, non-toxic PEG-400 as a carbon synthon for highly selective synthesis of quinolines (quinoxalines) and methylquinolines (methylquinoxalines) under metal-free conditions.
A silver-catalyzed formation of C-C bond for the construction of a series of polysubstituted quinolines from arylamines, aldehydes, and ketones or arylamines and 1,3-diketones has been developed. The transformation is effective for a broad range of substrates, thus enabling the expansion of constituent architectures on the heterocyclic framework. This use of a single catalytic system to mediate chemical transformations in a synthetic operation is important for the development of new atom-economic strategies and this strategy is efficient in building complex structures from simple starting materials in an environmentally benign fashion. (C) 2015 Elsevier Ltd. All rights reserved.
Metal-Free One-Pot Synthesis of (Tetrahydro)Quinolines through Three-Component Assembly of Arenediazonium Salts, Nitriles, and Styrenes
作者:So Won Youn、Huen Ji Yoo、Eun Mi Lee、Seo Young Lee
DOI:10.1002/adsc.201701451
日期:2018.1.17
achieved through a three‐component assembly reaction of arenediazonium salts, nitriles, and styrenes. In sharp contrast to the prior works with the same reagent blend, the formation of N‐arylnitrilium intermediates from arenediazonium salts and nitriles was followed by reaction with styrenes, leading to 3,4‐dihydroquinolinium salts as a common intermediate. These could be further transformed to quinolines