PEG-N<sub>2</sub>O<sub>4</sub>System as an Efficient Reagent both for the Rapid Oxidation of Urazoles and 1,4-Dihydropyridines under Nonaqueous Conditions
作者:Mohammad Ali Zolfigol、Ezat Ghaemi、Elaheh Madrakian、Khodabakhsh Niknam
DOI:10.1002/jccs.200800106
日期:2008.6
impregnated on polyethyleneglycol to give a stable reagent. Polyethyleneglycol-N2O4 (PEG-N2O4) system was used as an effective oxidizing agent for the oxidation of urazoles and bis-urazoles to their corresponding triazolinediones and also for the aromatization of 1,4-dihydropyridines into the corresponding pyridine derivatives under mild conditions at room temperature with good to excellent yields.
N2O4 很容易浸渍在聚乙二醇上,得到稳定的试剂。聚乙二醇-N2O4 (PEG-N2O4) 体系被用作有效的氧化剂,用于在温和的室温条件下将 urazoles 和 bi-urazoles 氧化为其相应的三唑啉二酮,也用于将 1,4-二氢吡啶芳构化为相应的吡啶衍生物具有良好至极好的产量的温度。