A Versatile Synthesis of 5′-Functionalized Nucleosides Through Regioselective Enzymatic Hydrolysis of Their Peracetylated Precursors
作者:Teodora Bavaro、Silvia Rocchietti、Daniela Ubiali、Marco Filice、Marco Terreni、Massimo Pregnolato
DOI:10.1002/ejoc.200801096
日期:——
describe a chemo-enzymatic synthesis of modified nucleosides through lipase-catalyzed hydrolysis of their peracetylated precursors. It was found from screening of a large number of substrates that these enzymes' regioselectivities were affected by the sugar and the nucleobase structures. By selecting the best enzyme for each substrate in terms of activity and regioselectivity, we prepared a small library
我们描述了通过脂肪酶催化水解其全乙酰化前体来化学酶促合成修饰核苷。通过对大量底物的筛选发现,这些酶的区域选择性受糖和核碱基结构的影响。通过在活性和区域选择性方面为每种底物选择最佳酶,我们制备了一个小型的不同单脱保护的嘌呤和嘧啶核苷库,可用作合成高价值核苷和单核苷酸的中间体。通过这种方法,从全乙酰化尿苷 1 化学酶法制备多西氟尿苷 (14) 和尿苷 5'-单磷酸酯 (5'-UMP, 15)。消除了与现有方法相关的许多处理阶段,并且产生了更高的产量和更高纯度的产品。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)