Oxidation of N-AcPheOMe (7) by H2O2 in CH3CN at room temperature catalyzed by complex 1a.
| Entry | Cat. (mol%) | H2O2 (eq) | Cosolv H2O | Conv. (%) | Yields of hydroxyphenylalanines | |||
|---|---|---|---|---|---|---|---|---|
| o | m | p | ||||||
| 1 | 1 | 2.5 | — | 35 | 11 | 3 | 13 | |
| 2 | 3 | 2.5 | — | 47 | 13 | 9 | 24 | |
| 3 | 5 | 2.5 | — | 36 | 9 | 6 | 16 | |
| 4 | 3 | 3.5 | — | 45 | 11 | 9 | 24 | |
| 5 | 3 | 5 | — | 37 | 4 | 6 | 9 | |
| 6b | 1 | 2.5 | — | 69 | 9 | 2 | 20 | |
| 7 | 3 | 2.5 | 7% | 45 | 6 | 10 | 24 | |
| 8 | 3 | 2.5 | 14% | 42 | 6 | 10 | 20 | |
| 9 | 3 | 2.5 | 21% | 40 | 7 | 10 | 20 | |
Yields (%) are referred to the initial amount of substrate. Reaction time 75 minutes.
Reaction time 120 min.