Metal-free synthesis of imidazopyridine from nitroalkene and 2-aminopyridine in the presence of a catalytic amount of iodine and aqueous hydrogen peroxide
A copper-catalyzed method for the synthesis of imidazo[1,2-a]pyridines with aminopyridines and nitroolefins using air as oxidation agent in a one-pot procedure has been developed. In this process, the reaction appears to be very general and suitable for construction of a variety of imidazo[1,2-a]pyridines.
开发了一种铜催化的一锅法,以空气为氧化剂,与氨基吡啶和硝基烯烃合成咪唑并[1,2- a ]吡啶。在此过程中,反应似乎非常普遍,适合于构建各种咪唑并[1,2- a ]吡啶。
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。
One-Pot Three-Component Synthesis of 3-nitro-2-arylimidazo[1,2-a]pyridine Derivatives Using Air as an Oxidant