ethyl 2-[2-O-(t-butyldimethylsilyl)-3,5-O-(di-t-butylsilylene)-β-D-4-thioribofuranosyl]thiazole-4-carboxylate | 1132807-47-6

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑类
• 英文名称: ethyl 2-[2-O-(t-butyldimethylsilyl)-3,5-O-(di-t-butylsilylene)-β-D-4-thioribofuranosyl]thiazole-4-carboxylate
• 英文别名: ethyl 2-[(4aR,6R,7R,7aS)-2,2-ditert-butyl-7-[tert-butyl(dimethyl)silyl]oxy-4a,6,7,7a-tetrahydro-4H-thieno[3,2-d][1,3,2]dioxasilin-6-yl]-1,3-thiazole-4-carboxylate
• CAS: 1132807-47-6
• 化学式: C₂₅H₄₅NO₅S₂Si₂
• 分子量: 559.939
• InChiKey: UTTLCQFEAPPXLG-UAFMIMERSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  7.32
• 重原子数：
  35
• 可旋转键数：
  9
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.84
• 拓扑面积：
  120
• 氢给体数：
  0
• 氢受体数：
  8

反应信息

• 作为反应物：
  描述：

  ethyl 2-[2-O-(t-butyldimethylsilyl)-3,5-O-(di-t-butylsilylene)-β-D-4-thioribofuranosyl]thiazole-4-carboxylate 在 氨 作用下， 以 甲醇 为溶剂， 反应 9.0h， 以99%的产率得到2-[2-O-(t-butyldimethylsilyl)-3,5-O-(di-t-butylsilylene)-β-D-4-thioribofuranosyl]thiazole-4-carboxamide
  参考文献：
  名称：

  Additive Pummerer Reaction of 3,5-O-(Di-tert-butyl)silylene-4-thiofuranoid Glycal: A High-Yield and β-Selective Entry to 4′-Thioribonucleosides

  摘要：

  Upon reacting 3,5-O-(di-tert-butyl)silylene-4-thiofuranoid glycal S-oxide (6) with Ac2O/TMSOAc/BF3 center dot OEt2 in CH2Cl2, the additive Pummerer reaction proceeded to furnish the corresponding 1,2-di-O-acetyl-4-thioribofuranose 7. Compound 7 serves as a highly beta-selective glycosyl donor in the Vorbruggen condensation carried out in the presence of TMSOTf. Thus, the 4-thio-beta-D-ribofuranosyl derivatives of uracil, thymine, N-4-acetylcytosine, 6-chloropurine, and 2-amino-6-chloropurine were synthesized. The use of 7 can be extended to the beta-selective synthesis of 4'-thio-C-ribonucleosides.

  DOI：

  10.1021/jo802615h
• 作为产物：
  描述：

  ethyl 2-[(4aR,6R,7R,7aS)-2,2-ditert-butyl-7-[tert-butyl(dimethyl)silyl]oxy-4a,6,7,7a-tetrahydro-4H-thieno[3,2-d][1,3,2]dioxasilin-6-yl]-4,5-dihydro-1,3-thiazole-4-carboxylate 在 三氯溴甲烷 、 1,5-二氮杂双环[4.3.0]壬-5-烯 作用下， 以 二氯甲烷 为溶剂， 以88%的产率得到ethyl 2-[2-O-(t-butyldimethylsilyl)-3,5-O-(di-t-butylsilylene)-β-D-4-thioribofuranosyl]thiazole-4-carboxylate
  参考文献：
  名称：

  Additive Pummerer Reaction of 3,5-O-(Di-tert-butyl)silylene-4-thiofuranoid Glycal: A High-Yield and β-Selective Entry to 4′-Thioribonucleosides

  摘要：

  Upon reacting 3,5-O-(di-tert-butyl)silylene-4-thiofuranoid glycal S-oxide (6) with Ac2O/TMSOAc/BF3 center dot OEt2 in CH2Cl2, the additive Pummerer reaction proceeded to furnish the corresponding 1,2-di-O-acetyl-4-thioribofuranose 7. Compound 7 serves as a highly beta-selective glycosyl donor in the Vorbruggen condensation carried out in the presence of TMSOTf. Thus, the 4-thio-beta-D-ribofuranosyl derivatives of uracil, thymine, N-4-acetylcytosine, 6-chloropurine, and 2-amino-6-chloropurine were synthesized. The use of 7 can be extended to the beta-selective synthesis of 4'-thio-C-ribonucleosides.

  DOI：

  10.1021/jo802615h