Preparation, characterization and catalytic activity of MMT-clay exchanged sulphonic acid functionalized ionic liquid for transesterification of β-ketoesters
A novel solid acid catalyst 2 was prepared by ion exchange of sulphonic acid functionalized ionic liquid into clay interlayers as a new organic–inorganic hybrid catalytic system. The ionic tag of the imidazolium supported sulphonic acid 1 assists in the pillaring process and enhances the organophilicity of catalyst 2 in the interlayers of clay. The catalytic activity of catalyst 2 as a recyclable solid Bronsted acid has been tested for the chemoselective ...
[Doyle, Michael P.; Westrum, Larry J.; Wolthuis, Wendelmoed N. E.; See, Marjorie M.; Boone, William P.; Bagheri, Vahid; Pearson, Matthew M. Journal of the American Chemical Society, 1993 , vol. 115, # 3 p. 958 - 964]
