%0 Journal Article
	%A R. Croitoru and  L. A. M. van den Broek and  A. E. Frissen and  C. M. Davidescu and  F. Peter and  C. G. Boeriu
	%D 2011
	%J International Journal of Chemical and Molecular Engineering
	%B World Academy of Science, Engineering and Technology
	%I Open Science Index 52, 2011
	%T Lipase Catalyzed Synthesis of Aromatic Esters of Sugar Alcohols
	%U https://publications.waset.org/pdf/14289
	%V 52
	%X Commercially available lipases (Candida antarctica lipase B, Novozyme 435, Thermomyces lanuginosus lipase, and Lipozyme TL IM), as well as sol-gel immobilized lipases, have been screened for their ability to acylate regioselectively xylitol, sorbitol, and mannitol with a phenolic ester in a binary mixture of t-butanol and dimethylsulfoxide. HPLC and MALDI-TOF MS analysis revealed the exclusive formation of monoesters for all studied sugar alcohols. The lipases immobilized by the sol-gel entrapment method proved to be efficient catalysts, leading to high conversions (up to 60%) in the investigated acylation reactions. From a sequence of silane precursors with different nonhydrolyzable groups in their structure, the presence of octyl and i-butyl group was most beneficial for the catalytic activity of sol-gel entrapped lipases in the studied process.

	%P 332 - 337