Synthesis of 4-sulfonatooxy-2,2,6,6-tetramethylpiperidine-1-yloxyl derivatives for investigation of ionic liquids
作者:Veronika Strehmel、Hans Rexhausen、Peter Strauch
DOI:10.1016/j.tetlet.2007.11.150
日期:2008.1
Direct sulfonation of 4-hydroxy-2,2,6,6-tetramethylpiperidine-1-yloxyl using chlorosulfuric acid trimethylsilylester results in 4-sulfonatooxy-2,2,6,6-tetramethylpiperidine-1-yloxyl in 94% yield that is the basis for the synthesis of potassium 4-sulfonatooxy-2,2,6,6-tetramethylpiperidine-1-yloxyl and sodium 4-sulfonatooxy-2,2,6,6-tetramethylpiperidine-1-yloxyl. These nitroxides can be employed as spin
使用氯硫酸三甲基甲硅烷基酯直接磺化4-羟基-2,2,6,6-四甲基哌啶-1-基氧基可产生4-磺酰氧基-2,2,6,6-四甲基哌啶-1-基氧基,产率为94%,即4-磺基磺酰氧基-2,2,6,6-四甲基哌啶-1-基氧基和4-磺基磺酰氧基-2,2,6,6-四甲基哌啶-1-基氧基钠的合成基础。这些氮氧化物可以用作自旋探针,以研究离子液体在分子域中的性质。