| No | Cu(OTf)2 mol% | Solvent | Compound 17% RCY | Compound 18% RCY |
| 1a | 0 | 0.4 ml | 0.0 | 0.0 |
| 2 | 50 | 0.4 ml | 2.5 | 2.0 |
| 3 | 100 | 0.4 ml | 2.5 | 3.0 |
| 4 | 0 | 1.0 ml | 0.0 | 0.0 |
| 5 | 10 | 1.0 ml | 12.0 | 11.5 |
| 6 | 25 | 1.0 ml | 15.0 | 12.8 |
| 7 | 50 | 1.0 ml | 21.0 | 25.0 |
| 8 | 75 | 1.0 ml | 28.0 | 30.5 |
| 9 | 100 | 1.0 ml | 48.0 | 41.0 |