1-[5-(4,4'-dimethoxytrityl)-3-(t-butyldimethylsilyl)-4-thio-beta-D-ribofuranosyl]uracil | 149359-06-8

• 分子结构分类: 有机化合物 - 苯类化合物 - 三苯基化合物
• 英文名称: 1-[5-(4,4'-dimethoxytrityl)-3-(t-butyldimethylsilyl)-4-thio-beta-D-ribofuranosyl]uracil
• CAS: 149359-06-8
• 化学式: C₃₆H₄₄N₂O₇SSi
• 分子量: 676.906
• InChiKey: PZBWUNLEGWWZPY-WXQJYUTRSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.93
• 重原子数：
  47.0
• 可旋转键数：
  11.0
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.39
• 拓扑面积：
  112.01
• 氢给体数：
  2.0
• 氢受体数：
  9.0

反应信息

• 作为反应物：
  描述：

  1-[5-(4,4'-dimethoxytrityl)-3-(t-butyldimethylsilyl)-4-thio-beta-D-ribofuranosyl]uracil 在 吡啶 、 咪唑 、 1H-1,2,4-三唑 、 triethylamine trihydrofluoride 、 三乙胺 、 三氯氧磷 作用下， 以 四氢呋喃 、 乙腈 为溶剂， 反应 24.0h， 生成 N⁴-benzoyl-1-[5-O-(4,4'-dimethoxytrityl)-4-thio-β-D-ribofuranosyl]cytosine
  参考文献：
  名称：

  Improving RNA Interference in Mammalian Cells by 4‘-Thio-Modified Small Interfering RNA (siRNA):  Effect on siRNA Activity and Nuclease Stability When Used in Combination with 2‘-O-Alkyl Modifications

  摘要：

  A systematic structure-activity relationship study of 4'-thioribose containing small interfering RNAs (siRNAs) has led to the identification of highly potent and stable antisense constructs. To enable this optimization effort for both in vitro and in vivo applications, we have significantly improved the yields of 4'-thioribonucleosides by using a chirally pure (R)-sulfoxide precursor. siRNA duplexes containing strategically placed regions of 4'-thio-RNA were synthesized and evaluated for RNA interference activity and plasma stability. Stretches of 4'-thio-RNA were well tolerated in both the antisense and sense strands. However, optimization of both the number and placement of X-thioribonucleosides was necessary for maximal potency. These optimized siRNAs were generally equipotent or superior to native siRNAs and exhibited increased thermal and plasma stability. Furthermore, significant improvements in siRNA activity and plasma stability were achieved by judicious combination of 4'-thioribose with 2'-O-methyl and 2'-O-methoxyethyl modifications. These optimized 4'-thio-siRNAs may be valuable for developing stable siRNAs for therapeutic applications.

  DOI：

  10.1021/jm050822c
• 作为产物：
  描述：

  叔丁基二甲基氯硅烷 、 1-[5-(4,4-dimethoxytrityl)-4-thio-β-D-ribofuranosyl]uracil 在 silver nitrate 作用下， 以 四氢呋喃 、 吡啶 为溶剂， 以63%的产率得到1-[5-(4,4'-dimethoxytrityl)-2-(t-butyldimethylsilyl)-4-thio-beta-D-ribofuranosyl]uracil
  参考文献：
  名称：

  [EN] 4'-THIONUCLEOSIDES AND OLIGOMERIC COMPOUNDS
  [FR] 4'-THIONUCLEOSIDES ET COMPOSES D'OLIGOMERES

  摘要：

  公开号：

  WO2005027962A3