Transesterification of Diethyl Oxalate with Phenol over Sol–Gel MoO3/TiO2 Catalysts
ChemSusChem2012Vol. 5(8), pp. 1467–1473
Citations Over TimeTop 22% of 2012 papers
Trupti V. Kotbagi, Duy Luan Nguyen, Christine Lancelot, Carole Lamonier, Kaew-arpha Thavornprasert, Wenli Zhu, Mickaël Capron, Louise Jalowiecki‐Duhamel, Shubhangi B. Umbarkar, Mohan K. Dongare, Franck Dumeignil
Abstract
The transesterification of diethyl oxalate (DEO) with phenol to form diphenyl oxalate (DPO) has been carried out in the liquid phase over very efficient MoO(3)/TiO(2) solid-acid sol-gel catalysts. A selectivity of 100 % with a remarkable maximum yield of 88 % were obtained, which opens the route to downstream phosgene-free processes for the synthesis of polycarbonates. Interpretation of the results of various acidity measurements (NH(3) and pyridine desorption, methanol oxidation as a probe reaction) allowed us to identify the catalytic sites as Lewis acid sites.
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