Abstract:
The direct oxidative esterification reaction of aldehydes is a conceptually and economically
attractive approach and, therefore, has received increasing attention. The improvement of a one pot oxidative esterification of aldehydes under heterogeneous catalytic conditions that reduce
jeopardy wastes is extremely required from both commercial and environmental points of view.
Amongst the reported schemes heterogeneous catalysts are favored due to their simplistic
reclamation, less contagion of the product and effective reusability. Recently, extensive and
intensive studies have been made on the heterogeneously catalyzed oxidative esterification of
aldehydes. Furthermore, V2O5/CBV400 complexes catalyzed esterification of aromatic aldehydes
under heterogeneous conditions with H2O2 has been explored in this study. In this research,
preparation of the catalyst in different weight ratios, screening it, characterized it using XRD,
BET, FT-IR, SEM, TGA techniques, application of the catalyst including optimization, substrate
scope, and reusability of the catalyst have been investigated. Methods used for both catalyst
synthesis and organic transformation were reflux method and the product obtained from the
transformation of aldehyde was 95% at optimized level of reaction condition (at 85℃, 20%
catalyst, 16ml methanol solvent, 0.4ml H2O2 oxidant and 3 & half hours). Also recycled the
catalyst five rounds and the last cycle has produced 84% yield. FT-IR and NMR characterization
of the as synthesized organic compound (methyl benzoate) was investigated.
