| Entry | Catalyst (wt.%) | Solvent | Temp ˚C | Time (h) | Yield (%)a |
| 1 | 5 | Neat | RT | 24 | 35 |
| 2 | 5 | MeOH | RT | 24 | 25 |
| 3 | 5 | EtOH | RT | 24 | 30 |
| 4 | 5 | THF | RT | 4 | 10 |
| 5 | 5 | Neat | 50 | 1.5 | 95 |
| 6 | 0 | Neat | 50 | 6.5 | 70 |
| 7 | 10 | Neat | 50 | 1.5 | 83 |
| 8 | 15 | Neat | 50 | 1.5 | 70 |
| 9 | 5 | MeOH | 50 | 4.0 | 75 |
| 10 | 5 | EtOH | 50 | 4.5 | 69 |
| 11 | 5 | IPA | 50 | 6 | 70 |