Decreasing enantioselectivity (E-value) by conversion has been observed in transesterification reactions of secondary alcohols catalyzed by a pure protein formulation of lipase B from Candida antarctica (Novozym 525 F). Addition of a range of enantiopure alcohols caused a temporary increase in enzyme selectivity in the transesterification reaction of 3-chloro-1-phenoxy-2-propanol with vinyl butanoate
