Abstract
Room temperature ionic liquids 1−butyl−3−methylimidazolium bromide, 1−butyl−3−methylimidazolium hexafluorophosphate, 1−butyl−3−methylimidazolium tetrafluoroborate, N−butylpyridinium bromide, N−butylpyridinium hexafluorophosphate, N−butylpyridinium tetrafluoroborate, and sponge ionic liquids N−cetylpyridinium bromide and N−cetylpyridinium tetrafluoroborate have been used as solvents and working catalysts for the synthesis of 2−amino−4−arylthiazole compounds. All the final compounds were characterized using FT−IR, NMR (1H and 13C), and mass spectral studies, while thermal stability and the corrected melting temperature of the synthesized compounds along with sponge ionic liquids was verified by performing thermal gravimetric analysis and differential scanning calorimetric analysis. Special emphasis has been laid to comprehend the mechanism of the catalytic action of ionic liquids alone as well as in the presence of organic solvents such as dimethyl sulfoxide, and ethanol.
Keywords: 2-amino thiazole, ionic liquids, sponge ionic liquids, catalytic cycle, pyridinium, FT−IR.
Graphical Abstract
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