Table 2.
Oxidation recycles of two alcohol substrates with H2O2 over SiliaCat Au
| Entry | Substrate | Au (mol%) | H2O2 (eq.) | Yield | Recycle |
|---|---|---|---|---|---|
| 1 | 4-methoxybenzyl alcohol | 1.0 | 3.2 | 80 % (aldehyde) 6 % (acid) |
1 |
| 2 | 4-methoxybenzyl alcohol | 1.0 | 3.2 | 68.6 % (aldehyde) 10.4 % (acid) |
2 |
| 3 | 4-methoxybenzyl alcohol | 1.0 | 3.2 | 62.5 % (aldehyde) 13.2 % (acid) |
3 |
| 4 | 1-phenylethanol | 0.5 | 1.5 | 69.5 % (ketone only) | 1 |
| 5 | 1-phenylethanol | 0.5 | 1.5 | 70.3 % (ketone only) | 2 |
| 6 | 1-phenylethanol | 0.5 | 1.5 | 68.4 % (ketone only) | 3 |
Reaction conditions: 10 mmol substrate, 10 mL H2O, 90 °C, 5 % H2O2 added dropwise; substrate:H2O2:Au = 100:150:1. The catalyst amount was determined following ICP-MS analysis of the Au load in the catalyst