38224-37-2Relevant academic research and scientific papers
A simple and efficient route to 2-arylimidazo[1,2-a]pyridines and zolimidine using automated grindstone chemistry
Das, Dharmendra,Bhutia, Zigmee T.,Panjikar, Padmini C.,Chatterjee, Amrita,Banerjee, Mainak
supporting information, p. 4099 - 4107 (2020/09/09)
A green and efficient mechanochemical method for the synthesis of a series of 2-arylimidazo[1,2-a]pyridines was developed using an electrical grinder. I2 catalyzed mechanochemical grinding facilitates the cyclocondensation reaction between various aryl methyl ketones and 2-aminopyridines to afford 2-arylimidazo[1,2-a]pyridines in good yields at ambient temperature. The method was successfully used for the gram-scale synthesis of a marketed drug, zolimidine. The noticeable advantages of this environmentally sustainable protocol include mild conditions, simple instrumentation, inexpensive catalyst, atom economy, short reaction time etc.
Oxidative Cross-Coupling of sp3- and sp2-Hybridized C-H Bonds: Vanadium-Catalyzed Aminomethylation of Imidazo[1,2-a]pyridines
Kaswan, Pinku,Porter, Ashley,Pericherla, Kasiviswanadharaju,Simone, Marissa,Peters, Sean,Kumar, Anil,Deboef, Brenton
supporting information, p. 5208 - 5211 (2015/11/18)
The vanadium-catalyzed oxidative coupling of substituted 2-arylimidiazo[1,2-a]pyridines to N-methylmorpholine oxide, which acts as both a coupling partner and an oxidant, has been achieved. This reaction was applied to various substituted imidiazo[1,2-a]pyridine and indole substrates, resulting in yields as high as 90%. Mechanistic investigations indicate that the reaction may proceed via a Mannich-type process. This work demonstrates how oxidative aminomethylation can be used as a useful method to introduce tertiary amines into heterocycles, thus providing an alternative method for conventional Mannich-type reactions.
Bis-cationic heteroaromatics as macrofilaricides: Synthesis of Bis- amidine and bis-guanylhydrazone derivatives of substituted imidazol[1,2- a]pyridines
Sundberg, Richard J.,Biswas, Sujay,Murthi, Krishna Kumar,Rowe, Donna,McCall, John W.,Dzimianski, Michael T.
, p. 4317 - 4328 (2007/10/03)
A series of guanylhydrazone, amidine, and hydrazone derivatives of 2- phenylimidazo[1,2-a]-pyridine have been prepared and evaluated for macrofilarial activity against Acanthocheilonema viteae and Brugia pahangi in jirds. Compounds with 4',6-bis-substitut
