有机化学 ›› 2011, Vol. 31 ›› Issue (07): 1032-1042. 上一篇    下一篇

研究论文

PS IM催化核苷类化合物3-酯选择性合成中的底物识别

王朝宇*,1,2,宗敏华2   

  1. (1淮阴工学院生命科学与化学工程学院 淮安 223003)
    (2华南理工大学应用生物催化研究室 广州 510640)
  • 收稿日期:2010-09-02 修回日期:2011-02-11 发布日期:2011-02-23
  • 通讯作者: 王朝宇 E-mail:biowzy@126.com

Substrate Recognition of the PS IM in Regioselective Synthesis of Nucleoside Analogs 3-O-Esters

Wang Zhaoyu*,1,2Zong Minhua2   

  1. (1 School of Life Science and Chemical Engineering, Huaiyin Institute of Technology, Huaian 223003)
    (2 Laboratory of Applied Biocatalysis, South China University of Technology, Guangzhou 510640)
  • Received:2010-09-02 Revised:2011-02-11 Published:2011-02-23
  • Contact: Zhao-Yu WANG E-mail:biowzy@126.com

研究了有机溶剂中酶促核苷类化合物3-酯高区域选择性的合成反应, 探讨了核苷结构中R1位取代基变化对酶促酰化反应的影响. 结果表明: 来源于Burkholderia cepacia的固定化脂肪酶PS IM在有机溶剂THF中的催化效果最佳, 且酰化反应的优势位点均为3-羟基(90%~>99%)|随着核苷中R1位取代基由F变化至CF3或酰基供体链长由C6增加至C14, 该酰化反应的3-区域选择性均呈现逐渐增加的趋势, 构效关系分析表明, 这主要源于PS IM酶特殊的活性中心结构.

关键词: PS IM, 核苷类似物, 选择性酰化, 底物识别

Regioselective enzymatic acylations of nucleosides with vinyl esters in organic solvents were studied for the preparation of 3-O-esters of the nucleosides. The influence of R1 substituent in the nucleosides on 3-OH regioselective acylation catalyzed by Burkholderia cepacia liapse was investigated. The results revealed that the immobilized lipase of PS IM from Burkholderia cepacia showed the highest regioselectivity towards the 3-OH of nucleosides (90%~>99%) among the lipases tested. Moreover, the 3-regioselectivity enhanced not only with the increment of the aliphatic chain of the acyl donors (C6, C10 and C14), but also with the increasing hydrophobicity of R1 group of 2-deoxynucleosides. These observations were mainly attributed to the specific structure feature of the PS IM.

Key words: PS IM, nucleoside analogs, regioselective acylation, substrate recognition

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