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| entry | deviations from the standard conditions | 3 (% yield) |
|---|---|---|
| 1 | none | 88 |
| 2 | 4CzIPN (10 mol %), N2 atmosphere | 34 |
| 3 | DCM as the solvent | 52 |
| 4 | MeOH as the solvent | 5 |
| 5 | N2 atmosphere | 71 |
| 6 | no light | 0 |
See Table S1 in the Supporting Information for a detailed optimization of the standard conditions.
