Abstract
Efficient oxidative cleavage of cinnamaldehyde to benzaldehyde by hydrogen peroxide in the presence of β-cyclodextrin (β-CD) and sodium bicarbonate in water has been developed. β-CD showed excellent activity for the oxidation under mild conditions. The effects of different reaction conditions, e.g. reaction temperature, the amount of β-CD, sodium bicarbonate and hydrogen peroxide concentrations, etc. have been investigated. The yield of benzaldehyde could reach 78% under the optimum conditions (333 K, 2 h, molar ratio for cinnamaldehyde:β-CD:sodium bicarbonate = 1:1:12). Moreover, a plausible mechanism including the formation of inclusion complex and the corresponding epoxide was proposed.
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