@article { ISI:000229066500020,
	title = {Transesterification of diethyl oxalate with phenol using MoO3/SiO2 catalyst},
	journal = {Applied Catalysis A-General},
	volume = {285},
	number = {1-2},
	year = {2005},
	month = {MAY},
	pages = {190-195},
	publisher = {ELSEVIER SCIENCE BV},
	type = {Article},
	address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS},
	abstract = {<p>Transesterification of diethyl oxalate (DEO) with phenol to form diphenyl oxalate (DPO) has been carried out in liquid phase using MoO3/ SiO2 solid acid catalyst with high conversion and 100\% selectivity. A series Of MoO3/SiO2 catalysts with different Mo loadings (1-20 wt\%) were prepared using sol-gel technique and characterized using X-ray diffraction analysis (XRD), BET specific surface area, temperature-programmed desorption (TPD) of ammonia, and FTIR spectroscopic analysis of adsorbed pyridine. XRD analysis revealed the amorphous nature of the catalyst up to 10 wt\% MoO3 loading and the formation of crystalline α-MoO3 phase on amorphous silica support with higher MoO3 loading. BET surface area showed high surface area for catalysts prepared by sol-gel technique with lower MoO3 content; the surface area decreases with increasing MoO3 loading. Ammonia TPD shows much higher acid strength compared to the catalysts prepared by impregnation technique. Among the series of catalysts prepared, MoO3/SiO2 containing 1 wt\% MoO3 was found to be the most active catalyst for transesterification reaction, with a maximum DEO conversion of 80.9 and 100\% selectivity for DPO. The effects of reaction temperature and catalyst concentration on conversion and product selectivity have been investigated. {\textcopyright} 2005 Elsevier B.V. All rights reserved.</p>},
	keywords = {diethyl oxalate, diphenyl oxalate, MoO3/SiO2, sol-gel technique, transesterification},
	issn = {0926-860X},
	doi = {10.1016/j.apcata.2005.02.028},
	author = {Biradar, Ankush V. and Shubhangi B. Umbarkar and Dongare, Mohan K.}
}
@article { ISI:000307308000020,
	title = {Transesterification of diethyl oxalate with phenol over sol-gel MoO3/TiO2 catalysts},
	journal = {Chemsuschem},
	volume = {5},
	number = {8},
	year = {2012},
	month = {JUL},
	pages = {1467-1473},
	publisher = {WILEY-V C H VERLAG GMBH},
	type = {Article},
	address = {BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY},
	abstract = {<p>The transesterification of diethyl oxalate (DEO) with phenol to form diphenyl oxalate (DPO) has been carried out in the liquid phase over very efficient MoO3/TiO2 solid-acid solgel 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 (NH3 and pyridine desorption, methanol oxidation as a probe reaction) allowed us to identify the catalytic sites as Lewis acid sites.</p>},
	keywords = {heterogeneous catalysis, Lewis acids, Oxidation, sol-gel processes, transesterification},
	issn = {1864-5631},
	doi = {10.1002/cssc.201100802},
	author = {Kotbagi, Trupti and Duy Luan Nguyen and Lancelot, Christine and Lamonier, Carole and Thavornprasert, Kaew-Arpha and Zhu Wenli and Capron, Mickael and Jalowiecki-Duhamel, Louise and Shubhangi B. Umbarkar and Dongare, Mohan K. and Dumeignil, Franck}
}
