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| Runa | Initiator | Catalysts | Loading (equiv.) | [1c] (M) | Time (h) | Conv. (%) |
|---|---|---|---|---|---|---|
| 1 | A3 | DPP | 0.1–1.0b | 0.2 | >99 | |
| 2 | A3 | TU/DBU | 0.2, 0.2 | 0.7 | 3 | >99 |
| 3 | H2O | TU/DBU | 0.1, 0.1 | 0.6 | 24 | 28 |
All reactions were conducted in toluene at 60 °C.
Gradually increased to 1.0 equiv.
