Magnetic carbon nanotube supported Cu (CoFe2O4/CNT-Cu) catalyst: A sustainable catalyst for the synthesis of 3-nitro-2-arylimidazo[1,2-a]pyridines
作者:Mo Zhang、Jun Lu、Jia-Nan Zhang、Zhan-Hui Zhang
DOI:10.1016/j.catcom.2016.02.004
日期:2016.3
A magnetic carbon nanotube supported Cu catalyst (CoFe2O4/CNT-Cu) was prepared, characterized and evaluated as a recoverable catalyst for synthesis of 3-nitro-2-arylimidazo[1,2-a]pyridines via one-potthree-component reactions of 2-aminopyridines, aldehydes and nitromethane. The reactions proceeded in PEG 400 under aerobic conditions and the products were obtained in good to excellent yields. The catalyst
制备了磁性碳纳米管负载的Cu催化剂(CoFe 2 O 4 / CNT-Cu),表征并评价为可回收的催化剂,可通过一锅三步合成3-硝基-2-芳基咪唑并[1,2- a ]吡啶。 -2-氨基吡啶,醛和硝基甲烷的-组分反应。反应在有氧条件下在PEG 400中进行,并以良好至极好的收率获得产物。该催化剂可以成功地循环使用八次,而不会明显丧失其活性。
Metal-free synthesis of imidazopyridine from nitroalkene and 2-aminopyridine in the presence of a catalytic amount of iodine and aqueous hydrogen peroxide
We have developed a metal-free synthetic method for 3-nitroimidazo[1,2-a]pyridines from nitroalkenes and 2-aminopyridines using catalytic amounts of iodine and aqueous hydrogen peroxide as a terminal oxidant.
NIS‐promoted multicomponent reaction of 2‐aminopyridines with aldehydes and nitromethane for the synthesis of 3‐nitroimidazo[1.2‐
<i>a</i>
]pyridines
作者:Jinwei Sun、Xinrui Yang、Yun Liu、Yi Wang、Yi Pan
DOI:10.1002/jhet.3869
日期:2020.3
An efficient synthesis of 3‐nitroimidazo[1,2‐a]pyridines has been developed via N‐iodosuccinimide (NIS)‐mediated multicomponents reaction of 2‐aminopyridines, aldehydes, and nitromethane under metal‐free conditions. This protocol has many advantages such as broad substituent scope, mild and eco‐friendly conditions, high step economy, and good yields.
通过N-碘代琥珀酰亚胺(NIS)介导的2-氨基吡啶,醛和硝基甲烷在无金属条件下的多组分反应,已开发出3-硝基咪唑并[1,2- a ]吡啶的有效合成方法。该方案具有许多优点,例如取代基范围广,条件温和,环境友好,步骤经济性高,产率高。
Synthesis of 3-Nitro-2-arylimidazo[1,2-a]pyridines Using Sodium Dichloroiodide
作者:Vikas Telvekar、Prashant Jagadhane
DOI:10.1055/s-0034-1379185
日期:——
Moderate to good yields of various 3-nitro-2-arylimidazo[1,2-a]pyridines have been easily achieved in the reaction of 2-aminopyridines and nitrostyrenes in the presence of sodium dichloriodide. The procedure is simple and various functional groups are tolerated in this reaction system.
One-Pot Three-Component Synthesis of 3-nitro-2-arylimidazo[1,2-a]pyridine Derivatives Using Air as an Oxidant