Mild Liquid Phase Oxidation of Benzyl Alcohol in the Presence of Microporous Framework Copper Silicates

Abstract

The microporous framework copper silicates CuSH‐1NaK (1) and SGU‐29 (2) – prepared using hydrothermal conditions – are effective heterogeneous oxidation catalysts for producing benzaldehyde (BzAld) and benzoic acid (BzAcid) from benzyl alcohol (BzOH), under mild reaction conditions (approximately atmospheric pressure, 70 °C). The copper silicate heterogeneous catalysts triggered a radical reaction mechanism leading to the target products; in particular, BzAcid was formed in up to 94 % yield and 100 % selectivity from BzAld. The type of oxidant and solvent influenced the catalytic performances.

Transforming Waste Clamshell into Highly Selective Nanostructured Catalysts for Solvent Free Liquid Phase Oxidation of Benzyl Alcohol

“…A topic of new interest in this context is the design of environmentally friendly, recyclable, active and extremely selective heterogeneous nanocatalysts. In a comparative study, Pd nanoparticles appear as a new category of useful catalysts for the oxidation of benzyl alcohol with several benefits [13][14][15][16][17]. Unfortunately, high costs usually limit the large-scale use of noble metal-based catalysts such as Pd [16,17].…”

Bio‐derived nanosilica‐anchored Cu(II)‐organoselenium complex as an efficient retrievable catalyst for alcohol oxidation

“…[27,28] Very recently, a microporous framework copper silicate and Cu(II)-MOF catalyst have been reported for mild liquid-phase and base-free aerobic oxidation of benzylic alcohols using H 2 O 2 as the oxidant, respectively. [29,30] Significant advancements had been made to synthesize immobilized copper nanoparticles and complexes with various ligands such as Schiff bases and N-heterocyclic carbene using silica, zeolite, clay, charcoal, nanocellulose, etc. as solid support, and their catalytic activity was investigated for alcohol oxidation and other transformations as well.…”