Kinetic resolution of a dihydrobenzofuran-type neolignan by lipase-catalysed acetylation
作者:Stefaan M.O. Van Dyck、Guy L.F. Lemière、Tim H.M. Jonckers、Roger Dommisse、Luc Pieters、Volker Buss
DOI:10.1016/s0957-4166(01)00135-5
日期:2001.4
The kinetic resolution of 3,5′-dimethoxy-4′,7-epoxy-8,3′-neolignane-4,9,9′-triol 1 by lipase-catalysed acetylation in an organic solvent was investigated. Ten different lipases were screened for enantioselectivity in the reaction. The enantiomeric excess (e.e.) of the products was strongly dependent on the type of lipase used. After optimisation of the reaction conditions for Candida cylindracea lipase
研究了在有机溶剂中通过脂肪酶催化的乙酰化反应3,5'-二甲氧基-4',7-环氧-8,3'-新戊烷-4,9,9'-三醇1的动力学拆分。筛选了十种不同的脂肪酶以进行反应中的对映选择性。产品的对映体过量(ee)在很大程度上取决于所用脂肪酶的类型。优化了念珠菌脂肪酶的反应条件后,反应的ee和收率大大提高,在某些情况下,尽管对映体纯度很低,但仍可以分离出对映体纯的起始原料1(主要是乙酰化(2 R,3 S)-1和(2 S,3 R)-酯。