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Tandem redox isomerization/oxa-Michael addition
 | |||
|---|---|---|---|
| entry | conditions | yield (conversion) |
comments |
| 1 | 30% CSA, 66 °C | 74% (100%) | 1:1 dr |
| 2 | 10% CSA, 66 °C | 70% (100%) | 1:1 dr |
| 3 | 30% CSA, rt | (0%) | SM recovered |
| 4 | 30% CSA, 40 °C | (< 10%) | 1:1 dr |
| 5 | 30% CSA, 20% L-proline, 66 °C | Traces | Catalyst poisoning |
