Lewis Acid Catalyzed C-N Bond Formation: Synthesis of Quinoxalines via CuX (X = Cl, Br, I) Catalyzed Cyclotrimerization of Alkynes with o-Phenylendiamines
作者:Ying Liang、Pei-Zhen Liu、Chan-Cui Wu、Qian Zhang
DOI:10.14233/ajchem.2015.18532
日期:——
An efficient one-pot cycloisomerization reaction has been developed for the synthesis of quinoxaline derivatives from alkynes and o-phenylendiamines using CuX (X = Cl, Br, I) as a catalyst. This method provides a flexible and rapid route to synthesize quinoxaline derivatives.
Coordinated assembly of a new 3D mesoporous Fe<sub>3</sub>O<sub>4</sub>@Cu<sub>2</sub>O–graphene oxide framework as a highly efficient and reusable catalyst for the synthesis of quinoxalines
作者:Zhiyi Wang、Guowen Hu、Jian Liu、Weisheng Liu、Haoli Zhang、Baodui Wang
DOI:10.1039/c5cc00250h
日期:——
A novel 3D mesoporous Fe3O4@Cu2O–graphene oxide framework as a highly efficient and reusable catalyst was synthesized.
一种新型的3D介孔Fe3O4@Cu2O-氧化石墨烯框架作为高效可重复使用的催化剂被合成。
Copper-Catalyzed Synthesis of Quinoxalines with <i>o-</i>Phenylenediamine and Terminal Alkyne in the Presence of Bases
A novel way of synthesizing quinoxalines efficiently through cyclization of o-phenylenediamine and terminal alkyne by Cu(II) and bases is developed. This reaction proceeds smoothly to give the products in moderate to good yields.
Cu–N‐heterocyclic carbene‐catalysed synthesis of 2‐aryl‐3‐(arylethynyl)quinoxalines from one‐pot tandem coupling of
<i>o</i>
‐phenylenediamines and terminal alkynes
A series of new benzimidazolium chlorides bearing N,N′‐benzyl, 2,4,6‐trimethylbenzyl and 2,4,6‐triisopropylbenzyl substituents have been designed and synthesized from various o‐phenylenediamines. Subsequently, corresponding Cu‐based N‐heterocyclic carbenes (NHCs) were generated in situ in the reaction medium which represents a new application of NHCs exploiting distinct catalytic property towards intermolecular