| Entry | Cat. (mol%) | Solvent | Time (h) | Yieldb |
| 1 | IL1 (20) | EtOH | 1 | 80 |
| 2 | IL2 (20) | EtOH | 1 | 88 |
| 3 | IL3 (20) | EtOH | 1 | 93 |
| 4 | IL3 (10) | EtOH | 1 | 87 |
| 5 | IL3 (30) | EtOH | 1 | 94 |
| 6 | IL3 (20) | EtOH | 0.5 | 89 |
| 7 | IL3 (20) | EtOH | 1.5 | 94 |
| 8 | IL3 (20) | EtOH | 2 | 94 |
| 9c | IL3 (20) | EtOH | 1 | 45 |
| 10 | IL3 (20) | CH3CN | 1 | 70 |
| 11 | IL3 (20) | CH2Cl2 | 1 | 40 |
| 12 | IL3 (20) | EtOAc | 1 | 75 |
| 13 | IL3 (20) | H2O | 1 | 58 |