Table 11.
Optimization of the reaction time with alkene 4a.
|   | ||
|---|---|---|
| Entry | Xhrs | Yield % (5a/5a”/4a) | 
| 1 | 6 | 22/2/61 | 
| 2 | 18 | 42/3/33 | 
| 3 | 24 | 48/5/25 | 
| 4 | 42 | 59/5/7 | 
Optimization of the reaction time with alkene 4a.
|   | ||
|---|---|---|
| Entry | Xhrs | Yield % (5a/5a”/4a) | 
| 1 | 6 | 22/2/61 | 
| 2 | 18 | 42/3/33 | 
| 3 | 24 | 48/5/25 | 
| 4 | 42 | 59/5/7 |