| Entry | Solvent | Catalyst loading (%) | Yield* (%) |
| 1 | DMF | 10 | 42 |
| 2 | CH3CN | 5 | 72 |
| 3 | CH3CN | 10 | 90 |
| 4 | CH3CN | 15 | 90 |
| 5 | EtOH | 10 | 50 |
| 6 | 1,4-dioxane | 10 | 45 |
| 7 | DCM | 10 | - |
| 8 | EtOAc | 10 | 25 |
| 9 | H2O | 10 | - |
| 10 | THF | 10 | - |
| 11 | DMSO | 10 | 30 |
| 12 | Toluene | 10 | - |