Metal-free oxidation of aldehydes to acids using the 4Na2SO4·2H2O2·NaCl adduct

Metal-free oxidation of aldehydes to acids using the 4Na2SO4·2H2O2·NaCl adduct Oxidation of aldehydes to carboxylic acids is a major reaction. Conventionally, this reaction is carried out with oxidants and metal catalysts, thus producing unwanted metal waste. Recently, aqueous media have been used as an alternative for toxic organic solvents. Here, we tested the clathrate-structured, neutral hydrogen peroxide adduct 4Na2SO4·2H2O2·NaCl for the oxidation of aldehydes to acids in aqueous solution. We found that various aromatic, heteroaromatic and aliphatic aldehydes were selectively oxidized to corresponding acids in 70–98% yields. This simple acid–base treatment allows to separate easily the acid product in high purity without any organic solvent. Moreover, the adduct is produced using 25% H2O2, with inexpensive sodium sulphate, Na2SO4, and sodium chloride, NaCl. The adduct is a non-toxic white crystalline solid, readily soluble in water, and easy to handle. Environmental Chemistry Letters Springer Journals

Metal-free oxidation of aldehydes to acids using the 4Na2SO4·2H2O2·NaCl adduct

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Springer International Publishing
Copyright © 2017 by Springer International Publishing Switzerland
Environment; Environmental Chemistry; Ecotoxicology; Pollution, general; Analytical Chemistry; Geochemistry
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