((1R,3R,4R,7S)-3-(6-benzamido-9H-purin-9-yl)-7-(benzyloxy)-2,5-dioxabicyclo[2.2.1]heptan-1-yl)methyl methanesulfonate | 293751-32-3

• 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: ((1R,3R,4R,7S)-3-(6-benzamido-9H-purin-9-yl)-7-(benzyloxy)-2,5-dioxabicyclo[2.2.1]heptan-1-yl)methyl methanesulfonate
• 英文别名: (1R,3R,4R,7S)-3-(6-N-benzoyladenine-9-yl)-7-benzyloxy-1-methanesulfonoxymethyl-2,5-dioxabicyclo[2.2.1]heptane；(1R,3R,4R,7S)-7-benzyloxy-1-methanesulfonyloxymethyl-3-(6-N-benzoyl-adenine-9-yl)-2,5-dioxabicyclo[2.2.1]heptane；[(1R,3R,4R,7S)-3-(6-benzamidopurin-9-yl)-7-phenylmethoxy-2,5-dioxabicyclo[2.2.1]heptan-1-yl]methyl methanesulfonate
• CAS: 293751-32-3
• 化学式: C₂₆H₂₅N₅O₇S
• 分子量: 551.58
• InChiKey: YFZXGOBKJUKVJW-WSAILGMDSA-N

物化性质

• 密度：
  1.54±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1.3
• 重原子数：
  39
• 可旋转键数：
  9
• 环数：
  6.0
• sp3杂化的碳原子比例：
  0.31
• 拓扑面积：
  152
• 氢给体数：
  1
• 氢受体数：
  10

反应信息

• 作为反应物：
  描述：

  ((1R,3R,4R,7S)-3-(6-benzamido-9H-purin-9-yl)-7-(benzyloxy)-2,5-dioxabicyclo[2.2.1]heptan-1-yl)methyl methanesulfonate 在 ammonium hydroxide 作用下， 以 甲醇 、 N,N-二甲基甲酰胺 为溶剂， 反应 55.0h， 生成 (1S,3R,4R,7S)-3-(adenine-9-yl)-7-benzyloxy-1-hydroxymethyl-2,5-dioxabicyclo[2.2.1]heptane
  参考文献：
  名称：

  通往2'-O，4'-C-亚甲基连接的双环核糖核苷（锁定核酸）的简便有效途径。

  摘要：

  描述了一种合成锁核酸（LNA）单体的新型有效方法。通过聚合合成制备了含有胸腺嘧啶，4-N-乙酰基和4-N-苯甲酰基胞嘧啶，6-N-苯甲酰腺嘌呤和2-N-异丁酰鸟嘌呤作为核碱基的LNA 5'，3'-二醇。该方法基于使用常见的糖中间体1,2-二-O-乙酰基-3-O-苄基-4-C-甲磺酰氧基甲基-5-O-甲磺酰-D-赤型戊呋喃糖（8）可以从D-葡萄糖以克数制得。使用改良的Vorbrüggen程序将四个不同的核碱基立体选择性地偶联到8个核碱基上，得到相应的4'-C-支链核苷衍生物。随后的闭环提供了受保护的LNA核苷。使用苯甲酸钠通过亲核取代有效地置换了5'-O-甲磺酰基。将5'-苯甲酸酯皂化，然后催化除去3'-O-苄基，得到游离的LNA二醇。腺苷和胞苷的环外氨基被选择性地酰化，得到4-N-乙酰基或4-N-苯甲酰基-LNA-C和6-N-苯甲酰基-LNA-A。在制备2-N-异丁酰基-LNA-G期间，鸟

  DOI：

  10.1021/jo010732p
• 作为产物：
  描述：

  溴甲苯 在 吡啶 、 sodium periodate 、 N,O-双三甲硅基乙酰胺 、 lithium hydroxide monohydrate 、 硫酸 、 sodium hydride 、 溶剂黄146 、 sodium hydroxide 作用下， 以 四氢呋喃 、 1,4-二氧六环 、 水 、 溶剂黄146 、 1,2-二氯乙烷 、 乙腈 、 mineral oil 为溶剂， 反应 249.5h， 生成 ((1R,3R,4R,7S)-3-(6-benzamido-9H-purin-9-yl)-7-(benzyloxy)-2,5-dioxabicyclo[2.2.1]heptan-1-yl)methyl methanesulfonate
  参考文献：
  名称：

  Synthesis of 2′-O,4′-C-alkylene-bridged ribonucleosides and their evaluation as inhibitors of HCV NS5B polymerase

  摘要：

  The synthesis of 2'-O,4'-C-methylene-bridged bicyclic guanine ribonucleosides bearing 2'-C-methyl or 5'C-methyl modifications is described. Key to the successful installation of the methyl functionality in both cases was the use of a one-pot oxidation-Grignard procedure to avoid formation of the respective unreactive hydrates prior to alkylation. The 2'-C-methyl- and 5'-C-methyl-modified bicyclic guanosines were evaluated, along with the known uracil-, cytosine-, adenine-, guanine-LNA and guanine-ENA nucleosides, as potential antiviral agents and found to be inactive in the hepatitis C virus (HCV) cell-based replicon assay. Examination of the corresponding nucleoside triphosphates, however, against the purified HCV NS5B polymerase indicated that LNA-G and 2'-C-methyl-LNA-G are potent inhibitors of both 1b wild type and S282T mutant enzymes in vitro. Activity was further demonstrated for the LNA-G-triphosphate against HCV NS5B polymerase genotypes 1a, 2a, 3a and 4a. A phosphorylation by-pass prodrug strategy may be required to promote anti-HCV activity in the replicon assay. (C) 2014 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.bmcl.2014.04.050

文献信息

• IMPROVED SYNTHESIS OF ¬2.2.1|BICYCLO NUCLEOSIDES
  申请人：Exiqon A/S

  公开号：EP1163250B1

  公开（公告）日：2006-07-12
• Chemoenzymatic Convergent Synthesis of 2′-<i>O</i>,4′-<i>C</i>-Methyleneribonucleosides
  作者：Vivek K. Sharma、Manish Kumar、Carl E. Olsen、Ashok K. Prasad

  DOI：10.1021/jo5008338

  日期：2014.7.3

  Novozyme-435-catalyzed efficient regioselective acetylation of one of the two diastereotopic hydroxymethyl functions in 3-O-benzyl-4-C-hydroxymethyl-1,2-O-isopropylidene-alpha-D-ribofuranose has been achieved. The enzymatic methodology has been successfully utilized for convergent synthesis of bicyclic nucleosides (LNA monomers) T, U, A, and C. Further, it has been demonstrated that Novozyme-435 can be used for 10 cycles of the acylation reaction without losing selectivity and efficiency.