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Table 2 Oxidation recycles of two alcohol substrates with H2O2 over SiliaCat Au

From: Sol–gel encapsulation of Au nanoparticles in hybrid silica improves gold oxidation catalysis

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
  1. 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