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| ||
|---|---|---|
| Radical scavenger | Yield of 3a | |
| 1a (R = Dipp) | THF (25 vol%) | 73% |
| 1a (R = Dipp) | Ph3SnH (2 equiv.) | 42% |
| 1b (R = tBu) | THF (25 vol%) | 79% |
| 1b (R = tBu) | Ph3SnH (2 equiv.) | 87% |
| 1c (R = Mes) | THF (25 vol%) | 63% |
Yields were determined by 1H NMR spectroscopy.
