首页> 外文期刊>RSC Advances >Indium-based metal–organic frameworks as catalysts: synthesis of 2-nitro-3-arylimidazo[1,2-a]pyridines via oxidative amination under air using MIL-68(In) as an effective heterogeneous catalyst
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Indium-based metal–organic frameworks as catalysts: synthesis of 2-nitro-3-arylimidazo[1,2-a]pyridines via oxidative amination under air using MIL-68(In) as an effective heterogeneous catalyst

机译:铟基金属有机框架作为催化剂:MIL-68在空气中通过氧化胺化合成2-硝基-3-芳基咪唑并[1,2- a ]吡啶 (In)作为有效的多相催化剂

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The metal–organic framework MIL-68(In) has emerged as a productive heterogeneous catalyst for the synthesis of 2-nitro-3-arylimidazo[1,2-a]pyridines via oxidative amination between 2-aminopyridines and nitroalkenes using air as an oxidation agent. The catalyst displayed impressively higher efficiency for the generation of 2-nitro-3-arylimidazo[1,2-a]pyridines than various other MOFs and several common homogeneous catalysts. Heterogeneous catalysis was verified for the reaction of 2-aminopyridines with nitroalkenes employing the framework-based catalyst. It was possible to collect and reuse the catalyst for the production of 2-nitro-3-arylimidazo[1,2-a]pyridines without a pronounced deterioration in catalytic efficiency. To the best of our knowledge, the preparation of 2-nitro-3-arylimidazo[1,2-a]pyridines has not been formerly conducted utilizing heterogeneous catalysts. Furthermore, indium-based catalysts were not previously employed for this transformation.
机译:金属-有机骨架MIL-68(In)已成为一种生产多相催化剂,可用于合成2-硝基-3-芳基咪唑并[1,2- a ]吡啶 。使用空气作为氧化剂,在2-氨基吡啶和硝基烯烃之间进行氧化胺化。与其他各种MOF和几种常见的均相催化剂相比,该催化剂显示出2-硝基-3-芳基咪唑并[1,2- a ]吡啶的惊人高效率。使用基于骨架的催化剂,对2-氨基吡啶与硝基烯烃的反应进行了非均相催化。可以收集并再利用催化剂生产2-硝基-3-芳基咪唑并[1,2- a ]吡啶,而不会明显降低催化效率。据我们所知,2-硝基-3-芳基咪唑并[1,2- a ]吡啶的制备以前并未使用非均相催化剂进行。此外,以前没有将铟基催化剂用于该转化。

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