Phosphine-Free Palladium-Catalyzed Direct Arylation of Imidazo[1,2-a]pyridines with Aryl Bromides at Low Catalyst Loading
作者:Hai Yan Fu、Lu Chen、Henri Doucet
DOI:10.1021/jo300528b
日期:2012.5.4
Ligand-free Pd(OAc)2 was found to catalyze very efficiently the directarylation of imidazo[1,2-a]pyridines at C3 under very low catalyst concentration. The reaction can be performed employing as little as 0.1–0.01 mol % catalyst with electron-deficient and some electron-excessive aryl bromides.
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。
Facile synthesis of 3-substituted imidazo[1,2-<i>a</i>]pyridines through formimidamide chemistry
作者:Rasapalli Sivappa、Vamshikrishna Reddy Sammeta、Yanchang Huang、James A. Golen、Sergey N. Savinov
DOI:10.1039/c9ra05841a
日期:——
A facile entry to 3-aryl/alkenyl/alkynyl substituted imidazo[1,2-a]pyridines (3a–p, 6a–d & 9a–9e) has been developed from readily available benzyl/allyl/propargyl halides and 2-amino pyridines as substrates via formimidamide chemistry that is devoid of caustic or expensive reagents, such as transition metal complexes. Quantum chemical calculations performed to understand the underlying mechanism of