| Entry | Substrate | Time (min) | Yield (%) |
| 1 | 3 | 3 | 4, 82 |
| 2 | 3a | 5 | 4a, 95 |
| 3 | 3b | 10 | 4b, 91 |
| 4 | 3c | 3 | 4c, 97 |
| 5 | 3d | 10 | 4d, 95 |