Table 3. Control Reactions and Mechanistic Experiments.
entry | deviation from standard conditions | % yield 3a |
---|---|---|
1 | none | 90 |
2 | 0.4 equiv (NH4)2S2O8 | 90 |
3 | 0.4 equiv (NH4)2S2O8, reaction in darkb | 32 |
4 | 0.4 equiv (NH4)2S2O8, no erythrosine B | 56 |
5 | no erythrosine B, no (NH4)2S2O8 | 14 |
6 | anaerobic conditionsc | 68 |
7 | anaerobic conditionsc, no (NH4)2S2O8 | 7 |
8 | no (NH4)2S2O8, 1 equiv BHT added | 0 |
9 | no (NH4)2S2O8, 1 equiv TEMPO added | 0 |
GC yields calculated using adamantane as the internal standard.
Reaction vessel was covered in an aluminum foil, and the reaction was carried out in a laboratory with the lights turned off.
Solvent was degassed, and the reaction was conducted under argon.