Solid supported platinum(0) nanoparticles catalyzed chemo-selective reduction of nitroarenes to N-arylhydroxylamines
作者:Arun K. Shil、Pralay Das
DOI:10.1039/c3gc41179f
日期:——
reducible functional groups such as halides, carboxylic acids, esters, amides, nitriles, keto, alkenes, alkynes and N-benzyl were well tolerated under the reaction conditions. This process was further successfully employed in 10 g scale reactions. N-Arylhydroxylamines were further applied for catalyst free synthesis of azoxybenzenes. Moreover, use of PEG-400 as cheap reaction medium, additive free methodology
固体负载铂(0)(SS-Pt)纳米颗粒通过还原/沉积方法开发为非均相催化剂,并通过SEM,TEM,EDX和XRD分析进行了表征。使用水合肼作为氢源,将SS-Pt催化剂用于将硝基芳烃化学选择性还原为N-芳基羟胺。在反应条件下,对各种可还原的官能团如卤化物,羧酸,酯,酰胺,腈,酮,烯烃,炔烃和N-苄基具有很好的耐受性。该方法进一步成功地用于10 g规模的反应中。ñ进一步将-芳基羟胺用于无催化剂合成a氧基苯。此外,将PEG-400用作廉价的反应介质,无添加剂的方法以及SS-Pt催化剂的可回收性高达十倍,而不会显着降低催化活性,这显然符合绿色化学原理。