Table 2. Scope of Oxidation of Benzylic Secondary Amines to Nitrones.

Conditions A: H2O2 30% v/v (4 equiv), MeOH, 50 °C, 12 h.
Conditions B: H2O2 30% v/v (2 equiv), CH3CN, rt.
Yield after chromatographic purification.
Reaction at 50 °C.
4 equiv of H2O2 is used.