1β-(6-bromopyridin-2-yl)-1,2-dideoxy-3,5-di-O-(t-butyldimethylsilyl)-D-ribofuranose | 912840-17-6

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 1β-(6-bromopyridin-2-yl)-1,2-dideoxy-3,5-di-O-(t-butyldimethylsilyl)-D-ribofuranose
• 英文别名: [(2R,3S,5R)-5-(6-bromopyridin-2-yl)-2-[[tert-butyl(dimethyl)silyl]oxymethyl]oxolan-3-yl]oxy-tert-butyl-dimethylsilane
• CAS: 912840-17-6
• 化学式: C₂₂H₄₀BrNO₃Si₂
• 分子量: 502.639
• InChiKey: WSEHHJWZJKYAED-CEXWTWQISA-N

计算性质

• 辛醇/水分配系数(LogP)：
  7.09
• 重原子数：
  29
• 可旋转键数：
  8
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.77
• 拓扑面积：
  40.6
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  1β-(6-bromopyridin-2-yl)-1,2-dideoxy-3,5-di-O-(t-butyldimethylsilyl)-D-ribofuranose 在 tris(dibenzylideneacetone)dipalladium (0) 、 lithium hexamethyldisilazane 、 tri tert-butylphosphoniumtetrafluoroborate 作用下， 以 四氢呋喃 为溶剂， 反应 2.0h， 以83%的产率得到1β-(6-aminopyridin-2-yl)-1,2-dideoxy-3,5-di-O-(t-butyldimethylsilyl)-D-ribofuranose
  参考文献：
  名称：

  New Modular and Efficient Approach to 6-Substituted Pyridin-2-yl C-Nucleosides

  摘要：

  A novel modular, efficient, and practical methodology of preparation of 6-substituted pyridin-2-yl C-nucleosides was developed. An addition of 2-lithio-6-bromopyridine 2b to TBDMS-protected 2-deoxyribonolactone 5 gave aduct 7 as an equilibrium mixture of anomeric hemiketals 1-(6-bromopyridin-2-yl)-1-hydroxynucleosides 7a, b and its open form 7c. Reduction of the adduct 7 with Et3SiH and BF3 center dot Et2O afforded the desired 6-bromonucleoside 8a as pure beta-anomer in a total yield of 32% over two steps from 5. Intermediate 8a was then subjected to a series of palladium catalyzed cross-coupling reactions and aminations to give a series of protected 1 beta-(6-alkyl-, 6-aryl-, and 6-aminopyridin-2-yl)-2-deoxyribonucleosides 9. Catalytic hydrogenation of 8a gave an unsubstituted pyridine C-nucleoside, and diazotative oxodeamination of 6-aminopyridine nucleoside 9f by isopentyl nitrite in acetic acid gave 6-oxopyridine nucleoside 10i. Deprotection of silylated nucleosides 9 by Et3N center dot 3HF gave a series of free C-nucleosides 10.

  DOI：

  10.1021/jo061080d
• 作为产物：
  描述：

  2-deoxy-D-ribose 在 咪唑 、 正丁基锂 、 溴 作用下， 以 四氢呋喃 、 正己烷 、 水 、 N,N-二甲基甲酰胺 为溶剂， 反应 145.33h， 生成 1β-(6-bromopyridin-2-yl)-1,2-dideoxy-3,5-di-O-(t-butyldimethylsilyl)-D-ribofuranose
  参考文献：
  名称：

  New Modular and Efficient Approach to 6-Substituted Pyridin-2-yl C-Nucleosides

  摘要：

  A novel modular, efficient, and practical methodology of preparation of 6-substituted pyridin-2-yl C-nucleosides was developed. An addition of 2-lithio-6-bromopyridine 2b to TBDMS-protected 2-deoxyribonolactone 5 gave aduct 7 as an equilibrium mixture of anomeric hemiketals 1-(6-bromopyridin-2-yl)-1-hydroxynucleosides 7a, b and its open form 7c. Reduction of the adduct 7 with Et3SiH and BF3 center dot Et2O afforded the desired 6-bromonucleoside 8a as pure beta-anomer in a total yield of 32% over two steps from 5. Intermediate 8a was then subjected to a series of palladium catalyzed cross-coupling reactions and aminations to give a series of protected 1 beta-(6-alkyl-, 6-aryl-, and 6-aminopyridin-2-yl)-2-deoxyribonucleosides 9. Catalytic hydrogenation of 8a gave an unsubstituted pyridine C-nucleoside, and diazotative oxodeamination of 6-aminopyridine nucleoside 9f by isopentyl nitrite in acetic acid gave 6-oxopyridine nucleoside 10i. Deprotection of silylated nucleosides 9 by Et3N center dot 3HF gave a series of free C-nucleosides 10.

  DOI：

  10.1021/jo061080d

文献信息

• Synthesis of Phenol and Pyridone C-Ribo- and 2′-Deoxyribonucleosides by Palladium-Catalyzed Hydroxylations of Haloaryl C-Nucleosides
  作者：Michal Hocek、Martin Štefko

  DOI：10.1055/s-0030-1258318

  日期：2010.12

  Phenol and pyridone C-nucleosides in both ribo- and deoxyribo series were prepared by palladium-catalyzed hydroxylations reactions from the corresponding TBS-protected bromophenyl and bromo- or chloropyridyl C-nucleosides using Buchwald-type ligand under mild conditions. Partial or complete desilylation of 5′-OH was observed in some cases. Free nucleosides (7 examples) were obtained in good overall

  核糖和脱氧核糖系列中的苯酚和吡啶酮C-核苷是由钯催化的羟基化反应，由相应的TBS保护的溴苯基和溴或氯吡啶基C-核苷在温和条件下使用Buchwald型配体制备的。在某些情况下，观察到5'-OH的部分或完全甲硅烷基化。游离核苷（7个实施例）在由TBS保护基团用Et切割好的总产率得到3 N˙3HF。 C-核苷-钯催化-羟基化-苯酚-吡啶酮
• New Modular and Efficient Approach to 6-Substituted Pyridin-2-yl C-Nucleosides
  作者：Milan Urban、Radek Pohl、Blanka Klepetářová、Michal Hocek

  DOI：10.1021/jo061080d

  日期：2006.9.1

  A novel modular, efficient, and practical methodology of preparation of 6-substituted pyridin-2-yl C-nucleosides was developed. An addition of 2-lithio-6-bromopyridine 2b to TBDMS-protected 2-deoxyribonolactone 5 gave aduct 7 as an equilibrium mixture of anomeric hemiketals 1-(6-bromopyridin-2-yl)-1-hydroxynucleosides 7a, b and its open form 7c. Reduction of the adduct 7 with Et3SiH and BF3 center dot Et2O afforded the desired 6-bromonucleoside 8a as pure beta-anomer in a total yield of 32% over two steps from 5. Intermediate 8a was then subjected to a series of palladium catalyzed cross-coupling reactions and aminations to give a series of protected 1 beta-(6-alkyl-, 6-aryl-, and 6-aminopyridin-2-yl)-2-deoxyribonucleosides 9. Catalytic hydrogenation of 8a gave an unsubstituted pyridine C-nucleoside, and diazotative oxodeamination of 6-aminopyridine nucleoside 9f by isopentyl nitrite in acetic acid gave 6-oxopyridine nucleoside 10i. Deprotection of silylated nucleosides 9 by Et3N center dot 3HF gave a series of free C-nucleosides 10.