Lipase-catalyzed asymmetric acylation in the chemoenzymatic synthesis of furan-based alcohols
作者:Piia Hara、Mihaela-Claudia Turcu、Riku Sundell、Monica Toşa、Csaba Paizs、Florin-Dan Irimie、Liisa T. Kanerva
DOI:10.1016/j.tetasy.2012.11.016
日期:2013.2
1-(furan-2-yl)ethanols were prepared from the corresponding carbonyl compounds for enantioselective acylation studies, and seven of them were used in preparative-scale kinetic resolutions with Candida antarctica lipase B (Novozym 435) and vinyl acetate in dried diisopropyl ether. Mechanism-based competition between the (R)-acetate (enzymatic acylation product), vinyl acetate (added acylating reagent), and acetic acid
由相应的羰基化合物制备了八种外消旋的1-(呋喃-2-基)乙醇,用于对映选择性酰化研究,其中七种经干燥后与南极假丝酵母脂肪酶B(Novozym 435)和乙酸乙烯酯用于制备规模的动力学拆分。二异丙醚。(R)乙酸盐(酶促酰化产物),乙酸乙烯酯(添加的酰化剂)和乙酸(酶促水解产物)与CAL-B的结合以及脂肪酶的残留水被证明是造成副反应的潜在原因,可能影响副反应1- [5-(2-氯苯基)和(4-溴苯基)呋喃-2-基]乙醇的动力学拆分过程。其他酒精底物未观察到明显的效果。对映体富集(醇解- [R )与在二异丙醚甲醇和CAL-B -acetates被证明是用于(脱保护的潜在方法- [R)-acetates而形成的(- [R )-醇。