Table 2.
Entry | Variation from Standard Conditions | Yield 2de (%) 1 |
---|---|---|
1 | NONE | 72 |
2 | 0 equiv. I2 | 40 |
3 | 0.2 equiv. I2 | 66 |
4 | 4A Molecular sieves | 8 |
5 | Reaction in dark 2 | 74 |
6 | 1 equiv. TEMPO | 19 |
1 Yields are based upon 1H-NMR integration with internal standard. 2 Reaction vessel was wrapped in aluminum foil and the experiment was performed in a laboratory with all lights turned off.