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

Table 5

Recovery of catalyst.

Number	Reaction	Yield (%)
1	First	91
2	Second	91
3	Third	90
4	Forth	88