1338469-65-0Relevant academic research and scientific papers
Synthesis of Imidazo[1,2- a]pyridines via Near UV Light-Induced Cyclization of Azirinylpyridinium Salts
Agafonova, Anastasiya V.,Filippov, Ilya P.,Khlebnikov, Alexander F.,Novikov, Mikhail S.,Rostovskii, Nikolai V.,Smetanin, Ilia A.,Titov, Gleb D.
supporting information, p. 6514 - 6519 (2022/05/04)
An efficient one-pot synthesis of imidazo[1,2-a]pyridines from 2-bromoazirines and pyridines has been developed. The construction of the bicyclic framework of imidazo[1,2-a]pyridines occurs in two steps through the formation of (2H-azirin-2-yl)pyridinium bromides followed by dehydrobrominative UV light-induced cyclization. The method can also be applied for the synthesis of imidazo[2,1-a]isoquinolines. Unstable in solution, (2H-azirin-2-yl)pyridinium/isoquinolinium bromides were quantitatively converted to stable tetrafluoroborates, which can be cyclized to imidazo[1,2-a]pyridines under UV irradiation in the presence of bromide ions.
Cu(I)-catalysed oxidative coupling of 2-aminopyridines with β-keto esters: Synthesis of imidazo[1,2-a]pyridine-3-carboxylates
Li, Xiaoqing
, p. 525 - 527 (2012/10/30)
A simple, economical, and environmentally friendly copper-catalysed direct oxidative C-N coupling of 2-aminopyridines with β-keto esters using air as oxidation agent for the creation of imidazo[1,2-a]pyridine-3-carboxylates is demonstrated. Imidazo[1,2-a]pyridine is the basic skeleton for a wide range of biological and pharmacological compounds.
Synthesis of imidazo[1,2-a]pyridines by the bis(acetyloxy)(phenyl)- λ3-iodane-Mediated oxidative coupling of 2-aminopyridines with β-keto esters and 1,3-diones
Wang, Xianpei,Ma, Lijuan,Yu, Wei
supporting information; experimental part, p. 2445 - 2453 (2011/09/15)
Imidazo[1,2-a]pyridine-3-carboxylates can be prepared directly from 2-aminopyridines and β-keto esters by using bis(acetyloxy)(phenyl)- λ3-iodane as an oxidant and boron trifluoride etherate as a catalyst. The amount of catalyst plays a key rol
TBAI-catalyzed oxidative coupling of aminopyridines with β-keto esters and 1,3-diones - Synthesis of imidazo[1,2-a]pyridines
Ma, Lijuan,Wang, Xianpei,Yu, Wei,Han, Bing
supporting information; experimental part, p. 11333 - 11335 (2011/11/29)
TBAI could catalyze the direct oxidative C-N coupling of 2-aminopyridines with β-keto esters and 1,3-diones, which affords imidazo[1,2-a]pyridines as the products. The reaction was realized under metal-free conditions by using tert-butyl hydroperoxide (TB
