Robust and Continuous Lipase-Catalyzed Reactions in Deep Eutectic Solvents: Low Viscosity and Double CLEA-LentiKats...

Deep Eutectic Solvents (DES) are used as reaction media for lipase-catalyzed esterifications in continuous devices. In particular, DES may be useful for lipophilization-like reactions involving substrates with unpaired solubilities. Aspects to be considered are the viscosity of the solvent, as well as the stability of the enzyme in the non-conventional media. The viscosity can be decreased by adding buffer as cosolvent (up to 20% v/v) and keeping the non-conventional nature. Lipases can be stabilized by following a double immobilization pattern, comprising CLEA formation and entrapment in LentiKats^®. The low viscosity and high stability of the CLEA-LK-lipase enable the use of DES under flow conditions.