1-Butyl-2,3-trimethyleneimidazolium bis(trifluoromethylsulfonyl)imide ([b-3C-im][NTf2]): a new, stable ionic liquid
作者:Jen-Yen Cheng、Yen-Ho Chu
DOI:10.1016/j.tetlet.2005.12.125
日期:2006.3
CD3OD/D2O (1:1) solution), the new ionicliquid was stable to solvent deuterium isotope exchange while the previously reported [bdmim][NTf2] and [bdmim][PF6] ionicliquids were 50% deuterium exchanged at its C-2 methyl in 30 min at ambient temperature. At the same experimental condition, the most commonly employed [bmim][PF6] ionicliquid was deuterium exchanged instantaneously at its C-2 hydrogen
描述了以咪唑为起始原料的新型双环离子液体[b-3C-im] [NTf 2 ]的合成。除了[b-3C-im] [NTf 2 ]四步合成的第二步烷基化反应(40%收率)外,其他均为高收率反应(分离收率为85-94 %)。我们研究了这种和其他咪唑基离子液体的固有反应性,发现在强碱性条件下(CD 3 OD / D 2 O(1:1)溶液中的KOD ),新的离子液体对溶剂氘同位素交换是稳定的而先前报道的[bdmim] [NTf 2 ]和[bdmim] [PF 6在室温下,在30分钟内将50%的氘离子与C-2甲基离子液体交换。在相同的实验条件下,最常用的[bmim] [PF 6 ]离子液体在其C-2氢上瞬间交换了氘。在没有碱的情况下(CD 3 OD / D 2 O = 1:1),只有[bmim] [PF 6 ]被氘交换(1 h内50%),并且其他离子液体甚至在1周后仍未检测到交换。环境温度。因此,可以得出结论,新的[b-3C-im]