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 class="table-group" id="tab4"><tr><td><table class="table"><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr class="thead"><td align="left" colspan="5"><img alt="834656.tab.004" src="https://static.hindawi.com/articles/jchem/volume-2013/834656/figures/834656.tab.004.jpg"/></td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td align="left">Entry</td><td align="center">Solvent</td><td align="center">Time (h)</td><td align="center">Temperature (°C)</td><td align="center">Yield (%)</td></tr><tr><td align="left" colspan="5"><hr/></td></tr><tr><td align="left">1</td><td align="center">Ethanol</td><td align="center">4</td><td align="center">Refluxing</td><td align="center">81</td></tr><tr><td align="left">2</td><td align="center">H<sub>2</sub>O</td><td align="center">4</td><td align="center">Refluxing</td><td align="center"><svg height="8.9125004" id="M4" style="vertical-align:-0.04095pt" version="1.1" viewbox="0 0 10.1 8.9125004" width="10.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,8.8)"><path d="M512 -3l-437 233v51l437 233v-58l-378 -200v-2l378 -199v-58z" id="x3C"></path></g>
</svg>20</td></tr><tr><td align="left">3</td><td align="center">MeCN</td><td align="center">4</td><td align="center">Refluxing</td><td align="center">70</td></tr><tr><td align="left">4</td><td align="center">CH<sub>2</sub>Cl<sub>2</sub></td><td align="center">8</td><td align="center">Refluxing</td><td align="center">38</td></tr><tr><td align="left">5</td><td align="center">Solvent-free</td><td align="center">0.5</td><td align="center">80</td><td align="center">93</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Formation of DHMP in different solvents and comparison with solvent-free condition.

Journal of Chemistry

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Table 4

Table 4: 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 4 | 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 