Efficient Access to 2,3-Diarylimidazo[1,2-<i>a</i>]pyridines via a One-Pot, Ligand-Free, Palladium-Catalyzed Three-Component Reaction under Microwave Irradiation
作者:Yuanxiang Wang、Brendan Frett、Hong-yu Li
DOI:10.1021/ol501136e
日期:2014.6.6
ligand-free, Pd(OAc)2-catalyzed, three-component reaction for the synthesis of 2,3-diarylimidazo[1,2-a]pyridines was developed under microwave irradiation. With the high availability of commercial reagents and great efficiency in expanding molecule diversity, this methodology is superior to the existing procedures for the synthesis of 2,3-diarylimidazo[1,2-a]pyridines analogues.
在微波辐射下,开发了一种快速的单锅、无配体、Pd(OAc) 2催化的三组分反应,用于合成 2,3-二芳基咪唑并[1,2- a ]吡啶。由于商业试剂的高可用性和扩展分子多样性的高效率,该方法优于现有的合成 2,3-二芳基咪唑并[1,2- a ]吡啶类似物的方法。
[EN] SYNTHESES OF METAL HETEROCYCLIC CARBENE ENOLATES AS COUPLING REACTIONS CATALYSTS<br/>[FR] SYNTHÈSES D'ÉNOLATES ET DE CARBÈNES HÉTÉROCYCLIQUES MÉTALLIQUES COMME CATALYSEURS DE RÉACTIONS DE COUPLAGE
申请人:COSKUN NEJDET
公开号:WO2017099693A1
公开(公告)日:2017-06-15
The invention relates to the synthesis methods of N-heterocyclic carbene NHCE metal complexes and their catalytic activities in carbon-carbon coupling reactions.
Straightforward Synthesis of Various 2,3-Diarylimidazo[1,2-<i>a</i>]pyridines in PEG<sub>400</sub>Medium through One-Pot Condensation and C-H Arylation
PEG400 is described herein as a suitable medium for the condensation of various 2-amino pyridines with α-bromo ketones. 2-Arylimidazo[1,2-a]pyridines were synthetized in a short time through microwave irradiation in moderate to excellent yields. After optimization, a convenient one-pot process enabled access to 2,3-diarylimidazo[1,2-a]pyridines by using a reduced amount of palladium catalyst without
AbstractAn efficient and economic Ag-catalyzed method for the direct cross-coupling of unactivated imidazo[1,2-a]pyridines with arylboronic acids has been developed. This approach leads to the formation of corresponding 2,3-diarylimidazo[1,2-a]pyridine derivatives as biological and pharmaceutical materials of interest in good yields under mild reaction conditions. Graphical abstract
摘要已开发出一种有效且经济的Ag催化方法,用于将未活化的咪唑并[1,2- a ]吡啶与芳基硼酸直接交叉偶联。该方法导致在温和的反应条件下以高收率形成相应的2,3-二芳基咪唑并[1,2- a ]吡啶衍生物,作为感兴趣的生物和制药材料。 图形概要
Cobalt-Catalyzed Direct Arylation of Imidazo[1,2-<i>a</i>
]pyridine with Aryl Iodides
作者:Dattatraya A. Babar、Haridas B. Rode
DOI:10.1002/ejoc.202000006
日期:2020.3.31
A practical protocol for the C‐3 arylation of imidazo[1,2‐a]pyridines with aryl/heteroaryl iodides using CoIICl2·6H2O is reported. The reaction can be performed in a Screw‐top V‐Vial® to expedite the synthesis.
报道了使用Co II Cl 2 · 6H 2 O将咪唑并[1,2- a ]吡啶与芳基/杂芳基碘化物进行C-3芳基化的实用协议。可以在Screw-topV-Vial®中进行反应,以加快合成速度。