Research Article

1-Methyl-3-(2-(sulfooxy)ethyl)-1H-imidazol-3-ium Chloride as a New and Green Ionic Liquid Catalyst for One-Pot Synthesis of Dihydropyrimidinones under Solvent-Free Condition

Figure 2

Comparison IR spectrum of ionic liquid 3, bronsted acidic ionic liquid 4.
834656.fig.002