4105-21-9Relevant articles and documents
Synthesis and Optical Properties of Push–Push–Pull Chromophores Based on Imidazo[5,1,2-cd]indolizines and Naphtho[1′,2′:4,5]imidazo[1,2-a]pyridines
Maitra, Ratnava,Chen, Jie-Hong,Hu, Ching-Han,Lee, Hon Man
, p. 5975 - 5985 (2017)
Four series of new push–push–pull chromophores based on two types of heterocyclic cores, namely imidazo[5,1,2-cd]indolizines and naphtho[1′,2′:4,5]imidazo[1,2-a]pyridines, and two types of linear π spacers, namely diphenylacetylene and biphenyl, were prep
Hetarenes with a bridge nitrogen atom. 6. Ambident properties of the oxazolo[3,2-a]pyridinium nucleus in reactions with nucleophiles: Prediction and experiment
Babaev,Pasichnichenko,Maiboroda
, p. 338 - 342 (1997)
We have studied the problem of ambident opening of five-membered and six-membered rings of the heteroaromatic oxazolo[3,2-a]pyridinium cation. A quantum chemical SINDO1 calculation of the energies of isomeric adducts of this cation with nucleophiles predi
Diversity-oriented synthesis toward aryl- And phosphoryl-functionalized imidazo[1,2-a]pyridines
Gernet, Aurelie,Sevrain, Nicolas,Volle, Jean-Noel,Ayad, Tahar,Pirat, Jean-Luc,Virieux, David
, p. 14730 - 14743 (2020)
We report herein an efficient synthesis of diversely polysubstituted imidazo[1,2-a]pyridines, a family of aza-heterocycles endowed with numerous biological properties, through a sequence involving two consecutive palladium-catalyzed cross-coupling reactions. First, we demonstrated that a Hirao coupling occurred straightforwardly in high yields at positions 3, 5, and 6 of imidazopyridine derivatives, giving access to a wide variety of substituted phosphonates, phosphinates, and phosphine oxides. In a second step, direct CH-arylation of phosphorylimidazopyridines with aryl halides was found to be effective and fully selective, leading to 3-aryl-substituted imidazopyridines in moderate to high yields depending on steric hindrance.
Solvent and catalyst-free synthesis of imidazo[1,2-a]pyridines by grindstone chemistry
Godugu, Kumar,Nallagondu, Chinna Gangi Reddy
, p. 250 - 259 (2020/10/23)
The present work describes the solvent and catalyst-free synthesis of imidazo[1,2-a]pyridines in excellent to nearly quantitative yields from 2-aminopyridines and a wide variety of ω-bromomethylketones using a grindstone procedure at 25°C to 30°C for 3 to
Palladium(ii) catalyzed site-selective C-H olefination of imidazo[1,2-: A] pyridines
Tali, Javeed Ahmad,Kumar, Gulshan,Singh, Davinder,Shankar, Ravi
supporting information, p. 9401 - 9406 (2021/11/17)
Herein, we disclose an efficient Pd(ii)-catalyzed site selective C8 alkenylation of imidazo[1,2-a]pyridines with electronically biased olefinic substrates. Notably, besides the presence of four C-H sites available, selective mono-alkenylation was achieved