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Effect of Radical Scavenger and Electron Transfer Inhibitors as Additives.
| Entry | Additive | % yield 2a | % yield 3a |
|---|---|---|---|
| 1 | None | 70 | 11 |
| 2 | TEMPO | 52 | 23 |
| 3 | galvinoxyl | 45 | 18 |
| 4 | 1,4-dinitrobenzene | 9 | 0 |
Reaction between 1a and PhI under standard conditions. Isolated yields.
