“…Indeed, during the last years, several ILs have been applied for biotransformation processes and advantages such as improvement of enzyme stability, substrate and/or product selectivity and suppression of side reactions could be observed (Klembt et al, 2007;Kragl et al, 2002;Park and Kazlauskas, 2003;van Rantwijk and Sheldon, 2007;van Rantwijk et al, 2003;Welton, 1999). The use of ILs as solvents for chemical reactions also revealed their excellent physicochemical properties: they dissolve both polar and non-polar organic, inorganic and polymeric materials (Dupont et al, 2002;Earle and Seddon, 2000;Holbrey and Seddon, 1999;OlivierBourbigou and Magna, 2002;Sheldon, 2001;Wasserscheid and Keim, 2000;Welton, 1999 6 ] have successfully been applied to increase the low solubility of sugars and to maintain the enzymatic activity in lipase-catalyzed synthesis of fatty acid sugar esters (Ganske and Bornscheuer, 2005a,b).…”