N²-isobutyryl-2'-deoxyguanosine

• 分子结构分类: 有机化合物 - 核苷、核苷酸和类似物 - 嘌呤核苷
• 英文名称: N²-isobutyryl-2'-deoxyguanosine
• 英文别名: N-isobutyryl-5'-O-levulinyl-2'-deoxyguanosine；((2R,3S,5R)-3-Hydroxy-5-(2-isobutyramido-6-oxo-3H-purin-9(6H)-yl)tetrahydrofuran-2-yl)methyl 4-oxopentanoate；[(2R,3S,5R)-3-hydroxy-5-[2-(2-methylpropanoylamino)-6-oxo-1H-purin-9-yl]oxolan-2-yl]methyl 4-oxopentanoate
• 化学式: C₁₉H₂₅N₅O₇
• 分子量: 435.437
• InChiKey: XBNNUTLRSIKLMD-YNEHKIRRSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.9
• 重原子数：
  31
• 可旋转键数：
  9
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.58
• 拓扑面积：
  161
• 氢给体数：
  3
• 氢受体数：
  9

反应信息

• 作为反应物：
  描述：

  N²-isobutyryl-2'-deoxyguanosine 在 吡啶 、 溶剂黄146 、 三乙胺 、 肼 作用下， 以 1,4-二氧六环 、 水 为溶剂， 反应 14.5h， 生成 N-(9-((2R,4S,5R)-4-(bis(4-methoxyphenyl)(phenyl)methoxy)-5-(hydroxymethyl)tetrahydrofuran-2-yl)-6-oxo-6,9-dihydro-1H-purin-2-yl)isobutyramide
  参考文献：
  名称：

  合成3' - O-二甲氧基三苯甲基-2'-脱氧核苷衍生物作为寡核苷酸合成基础的新型化学酶学方案

  摘要：

  已经开发了用于合成3' - O-二甲氧基三苯甲基-2'-脱氧核苷的简单，有效且可扩展的化学酶策略。该方法的关键特征是在南极假丝酵母脂肪酶B存在下，通过酶促酰化反应进行5'- O-乙酰丙氨酰-2'-脱氧核苷的区域选择性合成。此外，还观察到乙酰丙氨酰基从5'解封位置与常规的碱保护基完全相容。为了证明该方法的可扩展性，以25 g规模合成了3'- O-二甲氧基三苯甲基胸苷（4a）。这些单体（4 a - d）是合成寡核苷酸的有用组成部分。

  DOI：

  10.1021/op050253i
• 作为产物：
  描述：

  N2-异丁酰基-2′-脱氧鸟苷 在 4-二甲氨基吡啶 、 phosphate buffer 、 Pseudomonas cepacia lipase 、 三乙胺 、 N,N'-二环己基碳二亚胺 作用下， 以 1,4-二氧六环 为溶剂， 反应 30.0h， 生成 N²-isobutyryl-2'-deoxyguanosine
  参考文献：
  名称：

  寡核苷酸溶液相合成的基本组成部分：使用酶促方法对3'，5'-Di-O-乙酰丙氨酰核苷进行区域选择性水解。

  摘要：

  通过区域选择性酶水解反应，由相应的3'，5'-二-O-乙酰丙酰衍生物开发了一种简便的3'-和5'-O-乙酰丙酰-2'-脱氧核苷合成方法，避免了一些繁琐的化学保护/脱保护步骤。因此，发现南极假丝酵母脂肪酶B（CAL-B）选择性地水解5'-乙酰丙酸酯，以> 80％的分离产率提供3'-O-乙酰丙酰-2'-脱氧核苷3。另一方面，固定化的假单胞菌洋葱脂肪酶（PSL-C）和南极假丝酵母脂肪酶A（CAL-A）在3'-位置对水解表现出相反的选择性，从而在> 70的情况下提供5'-O-乙酰丙酰衍生物4 ％产率。相似的水解过程已成功扩展到3'-和5'-O-乙酰丙氨酰保护的2'的合成 -O-烷基核糖核苷7和8。这项工作首次证明了商业CAL-B和PSL-C在乙酰丙酸酯的区域选择性水解方面具有优异的选择性和产率。值得注意的是，受保护的胞苷和腺苷碱衍生物不足以用作用CAL-B进行酶促水解的底物，而PSL-C能够在选择

  DOI：

  10.1021/jo020080k

文献信息

• CAL-B-Catalyzed Acylation of Nucleosides and Role of the Sugar Conformation: An Improved Understanding of the Enzyme-Substrate Recognition
  作者：Saúl Martínez-Montero、Susana Fernández、Yogesh S. Sanghvi、Vicente Gotor、Miguel Ferrero

  DOI：10.1002/ejoc.201200609

  日期：2012.10

  that the sugar ring conformation of nucleosides plays a critical role during Candida antarctica lipase B (CAL-B) catalyzed acylation. Specifically, the North (N), but not the South (S) nucleoside sugar ring conformation is preferred for efficient binding at the catalytic site. In this study, we used nuclear magnetic resonance (NMR) spectroscopy experiments to establish the sugar ring conformation of nucleosides

  我们证明核苷的糖环构象在南极念珠菌脂肪酶 B (CAL-B) 催化酰化过程中起着关键作用。具体而言，北 (N) 而非南 (S) 核苷糖环构象对于在催化位点的有效结合是优选的。在这项研究中，我们使用核磁共振 (NMR) 光谱实验来建立核苷的糖环构象，并进行分子建模研究以支持观察结果。与具有 S 构象的 2'-脱氧核苷相比，具有 N-构象的核糖和 2'-取代的 (OMe, F) 核苷经历快速而容易的酰化。这项研究提高了我们对糖构象在使用 CAL-B 进行生物转化过程中酶-底物识别中所起关键作用的理解。
• Building blocks for the solution phase synthesis of oligonucleotides
  申请人：——

  公开号：US20020142307A1

  公开（公告）日：2002-10-03

  The present invention is directed to methods for the preparation of 3′—O and 5′—O—levulinyl nucleosides from common precursors using an enzymatic approach.

  本发明涉及用酶法从普通前体制备 3′-O 和 5′-O-levulinyl 核苷的方法。
• Enzymatic Parallel Kinetic Resolution of Mixtures of <scp>d</scp>/<scp>l</scp> 2′-Deoxy and Ribonucleosides: An Approach for the Isolation of β-<scp>l</scp>-Nucleosides
  作者：Saúl Martínez-Montero、Susana Fernández、Yogesh S. Sanghvi、Vicente Gotor、Miguel Ferrero

  DOI：10.1021/jo101368z

  日期：2010.10.1

  We have developed a lipase-catalyzed parallel kinetic resolution of mixtures of beta-D/L-nucleosides. The opposite selectivity during acylation exhibited by Pseudomonas cepacia lipase (PSL-C) with beta-D- and beta-L-nucleosides furnished acylated compounds that have different R-f values. As a consequence, isolation of both products was achieved by simple column chromatography. Computer modeling of the transition-state analogues during acylation of beta-D- and beta-L-2'-deoxycytidine with PSL-C was carried out to explain the high selectivity. PSL-C favored the 3'-O-levulination of the beta-D enantiomer, whereas the 5'-OH group was acylated in 2'-deoxy-beta-L-cytidine. In both cases, the cytosine base was placed in the alternate hydrophobic pocket of PSL's substrate-binding site, where it can form extra hydrogen bonds (in addition to the five essential catalytically relevant hydrogen bonds) that stabilize these intermediates catalyzing the selective acylation of beta-D/L-nucleosides.
• Direct Regioselective Enzymatic Acylation of Nucleosides: Building-Blocks for the Solution Phase Synthesis of Oligonucleotides
  作者：Javier García、Susana Fernández、Miguel Ferrero、Yogesh S. Sanghvi、Vicente Gotor

  DOI：10.1081/ncn-120023009

  日期：2003.10

  The synthesis of 3'- and 5'-O-levulinyl nucleosidic monomers through enzymatic acylation with acetonoxime levulinate is demonstrated. The acylation process takes place in one-step and use of expensive reagents, such as DMTrCl is avoided. The regioselectivity of the procedure makes it very convenient for acylated monomers required for solution phase synthesis of oligonucleotides.
• Process Development of Biocatalytic Regioselective 5′-<i>O</i>-Levulinylation of 2′-Deoxynucleosides
  作者：Alejandro Carnero、Yogesh S. Sanghvi、Vicente Gotor、Susana Fernández、Miguel Ferrero

  DOI：10.1021/acs.oprd.5b00152

  日期：2015.7.17

  An enzymatic process was optimized for regioselective levulinylation of the S'-hydroxyl group in 2'-deoxynucleosides. The results revealed that the nucleobase protecting group influenced the successful outcome of the enzymatic reaction. The enhanced solubility of 4-tert-butylphenoxyacetyl protected 2'-deoxynucleoside played a major role during acylation reaction enabling the starting nucleosides to be the best substrates for Candida antarctica lipase B. Furthermore, we have developed a packed column protocol as a superior alternative to batch process carried-out in a flask, particularly when scale-up is required. The industrial application of this method was demonstrated via the synthesis of 5'-O-levulinylthymidine on a 25 g scale.