Table 3.
Effect of catalyst loading on the Ireland–Claisen rearrangement of 1c.
 | |||
| Entry | C1 (mol %) | Yield of 3c (%) | syn/anti |
| 1 | 0 | 74 | 69:31 |
| 2 | 5 | 37 | 71:29 |
| 3 | 10 | 35 | 63:37 |
| 4 | 20 | 26 | 74:26 |
| 5 | 30 | 21 | 75:25 |
| 6 | 100 | 0 | – |
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