Entry | Catalyst | Time (h) | Yield (h) | dea (%) |
1 | 1 | 1 | 87 | 67 (syn) |
2 | 2 | 1 | 94 | 76 (anti) |
3 | 3 | 24 | 21 | 38 (syn) |
4 | 4 | 24 | 27 | 49 (anti) |