Table 4.
Effect of Ion-binder Co-catalyst 7 on Radical Cation Diels–Alder reaction.
 | ||||
|---|---|---|---|---|
| entry | [Ru] cat 3d | H-bond cat 7 | time | yield 6 |
| 1 | 1 mol% | 20 mol% | 2 h | 99% |
| 2 | 1 mol% | none | 2 h | 5% |
| 3 | none | 20 mol% | 2 h | 0% |
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