Table 1.
Oxidation of alcohols with H2O2 over SiliaCat Au
| Entry | Substrate | Au (mol%) | H2O2 (eq.) | Yield | Time (h) |
|---|---|---|---|---|---|
| 1 | Cinnamyl alcohol | 0.5 | 3.2 | 53.6 % (aldehyde only) | 3 |
| 2 | 1-phenylethanol | 0.5 | 3.2 | 94.2 % (ketone only) | 3 |
| 3 | 1-phenylethanol | 0.5 | 1.5 | 69.5 % (ketone only) | 3 |
| 4 | 4-methylbenzyl alcohol | 1.0 | 3.2 | 31 % (aldehyde) 6 % (acid) |
3 |
| 5 | 4-methoxybenzylalcohol | 1.0 | 3.2 | 80 % (aldehyde) 6 % (acid) |
3 |
| 6 | 1-nonanol | 1.0 | 3.2 | 13 % (aldehyde) 4 % (acid) |
3 |
| 7 | Cyclohexanol | 1.0 | 3.2 | 10 % (ketone) | 3 |
Reaction conditions: 10 mmol substrate, 10 mL H2O, 90 °C, 5 % H2O2 added dropwise during 30 min; the catalyst amount was determined following ICP-MS analysis of the Au load in the catalyst