1-[3,5-O-(1,1,3,3-tetraisopropyldisiloxane-1,3-diyl)-2-deoxy-2-iodo-β-D-ribofuranosyl]thymine | 1235869-72-3

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 1-[3,5-O-(1,1,3,3-tetraisopropyldisiloxane-1,3-diyl)-2-deoxy-2-iodo-β-D-ribofuranosyl]thymine
• CAS: 1235869-72-3
• 化学式: C₂₂H₃₉IN₂O₆Si₂
• 分子量: 610.637
• InChiKey: BJAZBXIUNQJPMS-ANTGDGSKSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.5
• 重原子数：
  33.0
• 可旋转键数：
  5.0
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.82
• 拓扑面积：
  91.78
• 氢给体数：
  1.0
• 氢受体数：
  7.0

反应信息

• 作为产物：
  描述：

  1,4-anhydro-2-deoxy-3,5-O-(1,1,3,3-tetraisopropyldisiloxane-1,3-diyl)-D-erythro-pent-1-entiol 、 O,O-二(三甲基甲硅烷基)胸苷 在 N-碘代丁二酰亚胺 作用下， 以 二氯甲烷 、 乙腈 为溶剂， 反应 12.0h， 以35%的产率得到1-[3,5-O-(1,1,3,3-tetraisopropyldisiloxane-1,3-diyl)-2-deoxy-2-iodo-β-D-ribofuranosyl]thymine
  参考文献：
  名称：

  Electrophilic glycosidation employing 3,5-O-(di-tert-butylsilylene)-erythro-furanoid glycal leads to exclusive formation of the β-anomer: synthesis of 2′-deoxynucleosides and its 1′-branched analogues

  摘要：

  Stereoselectivity in N-iodosuccimide (NIS)-mediated electrophilic glycosidation was examined by employing 2,4-bis-O-(trimethylsilyl)thymine and three different silyl-protected erythro-furanoid glycals 12, 16, and 18. As a result, it was found that 3,5-O-(di-t-butylsilylene)-protected 18 gave only the beta-anomer (21). The remarkable stereoselectivity observed by employing 18 is discussed on the basis of its X-ray crystallographic analysis. 1-Substituted glycals gave the corresponding beta-anomer, again exclusively, to provide access to 1'-branched 2'-deoxynucleosides. (C) 2010 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2010.04.043