| Catalyst (mg) | Temperature (˚C) | Time (h) | Solvent | Yield (%) |
| 90 | 50 | 6 |
| 33 |
| 120 | 50 | 6 |
| 36 |
| 150 | 50 | 6 |
| 42 |
| 180 | 50 | 6 |
| 39 |