| Cat | Additive | Yield (%) | ee (%) |
| 3.4 | AgOTf | 83 | 35 |
| 3.5 |
| 85 | 28 |
| 3.6 | AgOTf | nd |
|
| 3.7 | AgOTf | 9 | 8 |
| 3.8 | AgOTf | 11 | 11 |