| Catalyst | Solvent | Temp. (˚C) | Yield (%) |
| Without | Ethanol | 55 | 32 |
| AlCl3 | Ethanol | 55 | Traces |
| LiCl | Ethanol | 55 | 45 |
| InCl3 | Ethanol | 55 | 41 |
| LiCl | Water | 70 | 78 |
| NaCl | Water | 70 | 42 |
| HCl | Water | 70 | Traces |
| FeCl3 | Water | 70 | 40 |
| P-toluenesulfonic acid | Water | 70 | Traces |
| KCl | Water | 70 | 58 |
| AlCl3 | Water | 85 | Traces |
| InCl3 | Water | 85 | 76 |