1-phenoxy-2-pentyl butanoate 在
phosphate buffer 、 immobilized Novozym 525 F Candida antarctica lipase B 作用下,
以19%的产率得到(R)-1-phenoxy-2-pentanol
参考文献:
名称:
Immobilization does not influence the enantioselectivity of CAL-B catalyzed kinetic resolution of secondary alcohols
摘要:
Decreasing enantioselectivity (E-value) by increasing 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 selectivity of the transesterification reaction of 3-chloro-1-phenoxy-2-propanol with vinyl butanoate. The corresponding immobilized lipase B, (Novozym 435) showed a similar relationship between the E-value and degree of conversion. (C) 2004 Elsevier Ltd. All rights reserved.
In esterifications of secondaryalcohols catalyzed by immobilized lipase B from Candida antarctica (Novozym 435) the E-values decreased during the reaction. Hydrolysis of the corresponding butanoates showed the opposite effect. When an enantiopure (R)-alcohol, related but different, was added to the transesterification reaction, the E-value was significantly enhanced.