| Weight of catalyst (g) | Catalyst Yield (%) [time (min)] | |
| ZnBr2/HAP | ZnBr2/FAP | |
| 0.05 | 53 (75) | 56 (105) |
| 0.1 | 94 (75) | 93 (105) |
| 0.2 | 95 (75) | 96 (105) |
| 0.5 | 95 (75) | 96 (105) |