Synthesis of Imidazo[1,2-<i>a</i>]pyridines Using Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>as an Efficient Nanomagnetic Catalyst<i>via</i>a One-Pot Multicomponent Reaction
作者:Ali Maleki
DOI:10.1002/hlca.201300244
日期:2014.4
A one‐pot multicomponent synthesis of imidazo[1,2‐a]pyridine derivatives by using pyridin‐2‐amines, aldehydes, and terminalalkynes in the presence of a catalytic amount of silica‐supported iron oxide (Fe3O4@SiO2) nanoparticles in refluxing EtOH in good‐to‐excellent yields is reported.
咪唑并[1,2的一锅合成的多组分一]吡啶用吡啶-2-胺,醛,和末端炔烃在二氧化硅负载氧化铁的催化量存在衍生物(铁3 Ò 4 @SiO 2)报道了回流EtOH中的纳米颗粒,收率良好。
Synthesis of imidazo[1,2-a]pyridine in the presence of iodine–water catalytic system
We have devised an expedient, cleaner, and environmentally friendly approach for 'on water' mediated synthesis of imidazo[1,2-a]pyridine derivatives. The synthesis involves in situ formation of imines followed by addition of alkyne to give the desired products in excellent yield. (C) 2014 Elsevier Ltd. All rights reserved.