作者:Damianni Sebrão、Marcus M. Sá、Maria da Graça Nascimento
DOI:10.1016/j.procbio.2010.10.007
日期:2011.2
Abstract Lipases from ten different sources and two mycelium-bound lipases isolated from Amazonian fungi were screened as biocatalysts in the acylation reaction of d -ribono-1,4-lactone with a variety of acyl donors in non-aqueous media. Several reaction parameters were evaluated including the type and amount of enzyme, acyl donor, and organic solvent, as well as the influence of water and the recyclability
摘要 筛选了 10 种不同来源的脂肪酶和从亚马逊真菌中分离的两种菌丝结合脂肪酶,作为 d-ribono-1,4-内酯与多种酰基供体在非水介质中进行酰化反应的生物催化剂。评估了几个反应参数,包括酶、酰基供体和有机溶剂的类型和用量,以及水的影响和催化剂的可回收性。当使用南极念珠菌脂肪酶 (CAL-B) 时,酰化具有高度区域选择性,并且观察到相应的 5-酰基-d-核糖-1,4-内酯作为唯一产物。将乙酸乙烯酯作为乙酰基供体与 10 mg (100 U) CAL-B 在干燥乙腈中混合 24 小时后,获得最佳转化率 (>99%) 为 5-乙酰基-d-核糖基-1,4-内酯H。然而,来自洋葱伯克霍尔德菌(PSL-C 和 PSL-D)、荧光假单胞菌 (AK) 和嗜热丝孢菌 (Lipozyme TL-IM) 的脂肪酶以较低的转化率产生单乙酰化、二乙酰化和三乙酰化产物的混合物。当癸酸和十二烷酸用作 d-ribono-1