1-[(2R,3R,4S,5R)-3-azido-5-[[tert-butyl(dimethyl)silyl]oxymethyl]-4-hydroxyoxolan-2-yl]pyrimidine-2,4-dione | 184296-84-2

• 分子结构分类: 有机化合物 - 核苷、核苷酸和类似物 - 嘧啶核苷
• 英文名称: 1-[(2R,3R,4S,5R)-3-azido-5-[[tert-butyl(dimethyl)silyl]oxymethyl]-4-hydroxyoxolan-2-yl]pyrimidine-2,4-dione
• CAS: 184296-84-2
• 化学式: C₁₅H₂₅N₅O₅Si
• 分子量: 383.48
• InChiKey: ULLZWQFRCGUQCU-OJAKKHQRSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.5
• 重原子数：
  26
• 可旋转键数：
  6
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.73
• 拓扑面积：
  103
• 氢给体数：
  2
• 氢受体数：
  7

反应信息

• 作为反应物：
  描述：

  1-[(2R,3R,4S,5R)-3-azido-5-[[tert-butyl(dimethyl)silyl]oxymethyl]-4-hydroxyoxolan-2-yl]pyrimidine-2,4-dione 在 三苯基硅烷 、 过氧化苯甲酰 作用下， 以 甲苯 为溶剂， 反应 7.0h， 以7%的产率得到5'-O-(tert-butyldimethylsilyl)-2'-deoxyuridine
  参考文献：
  名称：

  Nucleic Acid Related Compounds. 91. Biomimetic Reactions Are in Harmony with Loss of 2‘-Substituents as Free Radicals (Not Anions) during Mechanism-Based Inactivation of Ribonucleotide Reductases. Differential Interactions of Azide, Halogen, and Alkylthio Groups with Tributylstannane and Triphenylsilane¹

  摘要：

  The initial step in the mechanism-based inactivation of ribonucleotide reductases by 2'-chloro-2'-deoxynucleotides is abstraction of H3' by a proximal free radical on the enzyme. The C3' radical is postulated to undergo spontaneous loss of chloride, and the resulting cationic radical loses a proton to give a 3'-keto intermediate. Successive beta-eliminations produce a Michael acceptor which causes inactivation. This hypothesis would predict rapid loss of mesylate or tosylate anions from C2', but sluggish loss of azide or thiomethoxide. in contrast, loss of azido and methylthio radicals from C2' should occur readily whereas homolysis to give (methyl or tolylsulfonyl)oxy and fluoro radicals should be energetically prohibitive. Protected 3'-O-(phenoxythiocarbonyl)-2'-substitute nucleosides were treated with tributylstannane/AIBN or triphenylsilane/dibenzoyl peroxide in refluxing toluene. The 2'-O-(mesyl and tosyl) and 2'-fluoro compounds underwent direct radical-mediated hydrogenolysis of the thionocarbonate group to give 3'-deoxy-2'-substituted products, whereas 2'-(azido, bromo, chloro, iodo, and methylthio)-3'-thionocarbonates gave 2',3'-didehydro-2',3'-dideoxy derivatives via loss of 2'-substituents from an incipient C3' radical. These results are in harmony with loss of radicals, but not anions, from C2'. The well-known radical-mediated hydrogenolytic cleavage of halogen and methylthio (slow) groups from C2' of the S'-hydroxy (unprotected) precursors and reduction of 2'-azides to amines occurred with tributylstannane/AIBN. Triphenylsilane/dibenzoyl peroxide gave parallel (but slower) hydrogenolysis with the 2'-(iodo, bromo, and methylthio) compounds, but cleavage of the 2'-chloro group was very slow and no reduction of 2'-azides to amines was detected. Rather, the latter system effected slow hydrogenolytic removal of the 2'-azido group. Thus, chemoselective differentiation of certain functional groups is possible with triphenylsilane and tributylstannane. Reduction of azides to amines with tributylstannane is known, but hydrogenolytic deazidation (slow) with triphenylsilane in the absence of amine formation appears to be novel.

  DOI：

  10.1021/ja962117m
• 作为产物：
  描述：

  叔丁基二甲基氯硅烷 、 2'-叠氮-2'-脱氧尿苷 在 咪唑 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 以94%的产率得到1-[(2R,3R,4S,5R)-3-azido-5-[[tert-butyl(dimethyl)silyl]oxymethyl]-4-hydroxyoxolan-2-yl]pyrimidine-2,4-dione
  参考文献：
  名称：

  Nucleic Acid Related Compounds. 91. Biomimetic Reactions Are in Harmony with Loss of 2‘-Substituents as Free Radicals (Not Anions) during Mechanism-Based Inactivation of Ribonucleotide Reductases. Differential Interactions of Azide, Halogen, and Alkylthio Groups with Tributylstannane and Triphenylsilane¹

  摘要：

  The initial step in the mechanism-based inactivation of ribonucleotide reductases by 2'-chloro-2'-deoxynucleotides is abstraction of H3' by a proximal free radical on the enzyme. The C3' radical is postulated to undergo spontaneous loss of chloride, and the resulting cationic radical loses a proton to give a 3'-keto intermediate. Successive beta-eliminations produce a Michael acceptor which causes inactivation. This hypothesis would predict rapid loss of mesylate or tosylate anions from C2', but sluggish loss of azide or thiomethoxide. in contrast, loss of azido and methylthio radicals from C2' should occur readily whereas homolysis to give (methyl or tolylsulfonyl)oxy and fluoro radicals should be energetically prohibitive. Protected 3'-O-(phenoxythiocarbonyl)-2'-substitute nucleosides were treated with tributylstannane/AIBN or triphenylsilane/dibenzoyl peroxide in refluxing toluene. The 2'-O-(mesyl and tosyl) and 2'-fluoro compounds underwent direct radical-mediated hydrogenolysis of the thionocarbonate group to give 3'-deoxy-2'-substituted products, whereas 2'-(azido, bromo, chloro, iodo, and methylthio)-3'-thionocarbonates gave 2',3'-didehydro-2',3'-dideoxy derivatives via loss of 2'-substituents from an incipient C3' radical. These results are in harmony with loss of radicals, but not anions, from C2'. The well-known radical-mediated hydrogenolytic cleavage of halogen and methylthio (slow) groups from C2' of the S'-hydroxy (unprotected) precursors and reduction of 2'-azides to amines occurred with tributylstannane/AIBN. Triphenylsilane/dibenzoyl peroxide gave parallel (but slower) hydrogenolysis with the 2'-(iodo, bromo, and methylthio) compounds, but cleavage of the 2'-chloro group was very slow and no reduction of 2'-azides to amines was detected. Rather, the latter system effected slow hydrogenolytic removal of the 2'-azido group. Thus, chemoselective differentiation of certain functional groups is possible with triphenylsilane and tributylstannane. Reduction of azides to amines with tributylstannane is known, but hydrogenolytic deazidation (slow) with triphenylsilane in the absence of amine formation appears to be novel.

  DOI：

  10.1021/ja962117m

文献信息

• Novel bicyclic sugar modified nucleosides: synthesis, conformational analysis and antiviral evaluation
  作者：Nurolaini Kifli、Thet Thet Htar、Erik De Clercq、Jan Balzarini、Claire Simons

  DOI：10.1016/j.bmc.2004.03.072

  日期：2004.6

  Methodology previously described by us was applied to the formation of novel conformationally restrained bicyclic sugar modified nucleosides, with introduction of an oxazole and a thiocarbamate ring at the 2('),3(')-positions of the ribonucleosides. Two novel alkyl derivatives of 2('),3(')-dideoxy-2('),3(')-oxazole-beta-d-uridine and a novel uridine 2('),3(')-thiocarbamate were successfully synthesised. Conformational

  我们先前描述的方法学被应用于形成新的构象上受约束的双环糖修饰的核苷，并在核糖核苷的2（'），3（'）-位引入了恶唑和硫代氨基甲酸酯环。两个新的2（'），3（'）-dideoxy-2（'），3（'）-恶唑-β-d-尿苷的烷基衍生物和一个新的尿苷2（'），3（'）-硫代氨基甲酸酯成功合成。通过宏模型v.6.0分子建模程序使用理论势能计算对所有合成的化合物进行构象评估。针对各种DNA和RNA病毒评估了上述构象受限的核苷。在亚毒性浓度下，没有一种化合物显示出特定的抗病毒作用。