Table 3.
entry | N2/air | treatment with PPh3 | A/K b |
---|---|---|---|
1 | N2 | yes | 4.6 ± 0.1 |
2 | no | 4.5 ± 0.0 | |
3 | air | yes | 6.1 ± 0.8 |
4 | no | 4.2 ± 0.7 |
Conditions: 0.125 mmol mCPBA, 7.5 equiv 2, 0.1 mol % 1a, DCM/MeCN (3:1, 0.125 M), 50 °C, 5 min.
Arithmetic mean of three repeated experiments.