Table 4.
Entry | Solventb | Yield 16 (%)c | Yield 17 (%)c |
1 | DMSOd | 0 | 87 |
2 | anisolee | 0 | 85 |
3 | n-BuOAce | 0 | 89 |
4 | 1,4-dioxanef | 2 | 85 |
5 | toluened | 18 | 67 |
6 | CPMEd | 5 | 80 |
7 | n-BuOHe | 5 | 73 |
aReactions were performed on a 5 mmol scale in 10 mL of solvent using 1 atmosphere of O2 (balloon). bClassification of solvents as provided in [44]. cIsolated yields. dProblematic. eRecommended. fHazardous.