A Superior New Route to Methyl Phosphonate-based Ionic Liquids
作者:Carmen Froschauer、Herbert Sixta、Hedda K. Weber、Gerhard Laus、Volker Kahlenberg、Herwig Schottenberger
DOI:10.1246/cl.2012.945
日期:2012.9.5
In the search for new ionic liquids (ILs) for biomass processing, analytical chemistry, or modern nonvolatile fire retarding agents, alkyl phosphonate-based ILs represent very promising candidates. A very practical synthesis of such ILs, which is superior to the conventional quaternization of 1-alkylimidazoles by dimethyl phosphite (DMP), was developed. 1,3-Dialkylimidazolium halide salts serve as convenient starting materials, and various 1,3-dialkylimidazolium methyl phosphonates are thus accessible by simple, fast, and solvent-free procedures with DMP, where the anion is methylated.
Recyclable and reusable ionic liquid-supported azo precursors in Mitsunobu reactions
作者:Cheng-Kun Lin、Wei Lee、Chun-Fu Wu、Fang-Yi Shih
DOI:10.1039/d2ob00039c
日期:——
A new type of azo precursor, ionic liquid-supported hydrazidecarboxylate, was synthesized and applied in Mitsunobu reactions. The developed reagent is recyclable during the reaction and reusable after recovery by the ionic liquids. The ionicliquid-based azo precursor in conjugation with PhI(OAc)2 has been proved to be useful in the formation of carbon–oxygen, carbon–nitrogen, and carbon–sulfur bonds