Abstract
The lipase-catalysed kinetic resolution of secondary alcohols was studied using vinyl acetate as acyl donor in propylene carbonate. Propylene carbonate offers an environmentally friendly alternative in contrast to conventional solvents. Several different lipases were investigated, and Candida antarctica lipase B (CALB) exhibited better results for all the substrates. It was shown that the addition of non-reactive base triethylamine and silver oxide to the reaction mixture enhanced the reaction rate and enantioselectivity. With propylene carbonate as solvent, CALB could be recycled without significant activity or enantioselectivity losses.
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