tert-butyldimethylsilyl 2-azido-4,6-O-benzylidene-3-O-(2-chloroacetyl)-2-deoxy-β-D-galactopyranoside | 1381864-48-7

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡喃二恶英
• 英文名称: tert-butyldimethylsilyl 2-azido-4,6-O-benzylidene-3-O-(2-chloroacetyl)-2-deoxy-β-D-galactopyranoside
• CAS: 1381864-48-7
• 化学式: C₂₁H₃₀ClN₃O₆Si
• 分子量: 484.024
• InChiKey: XIDOJAJTGPEODK-AZQPHWPRSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.68
• 重原子数：
  32.0
• 可旋转键数：
  6.0
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.67
• 拓扑面积：
  111.98
• 氢给体数：
  0.0
• 氢受体数：
  7.0

反应信息

• 作为反应物：
  描述：

  tert-butyldimethylsilyl 2-azido-4,6-O-benzylidene-3-O-(2-chloroacetyl)-2-deoxy-β-D-galactopyranoside 在 四丁基氟化铵 、 溶剂黄146 作用下， 以 四氢呋喃 为溶剂， 反应 2.0h， 生成 2-azido-4,6-O-benzylidene-3-O-chloroacetyl-2-deoxy-β-D-galactopyranoside 、 2-azido-4,6-O-benzylidene-3-O-(2-chloroacetyl)-2-deoxy-α-D-galactopyranose
  参考文献：
  名称：

  A stereocontrolled construction of 2-azido-2-deoxy-1,2-cis-α-galactosidic linkages utilizing 2-azido-4,6-O-benzylidene-2-deoxygalactopyranosyl diphenyl phosphates: stereoselective synthesis of mucin core 5 and core 7 structures

  摘要：

  TMSOTf-promoted glycosidation of 2-azido-4,6-O-benzylidene-2-deoxygalactosyl diphenyl phosphates with fluorenylmethoxycarbonyl (Fmoc)-protected serine and threonine derivatives in THF/Et2O (1:1) gave glycosyl amino acids in high yields and with excellent levels of alpha-selectivity (alpha/beta=94:6-95:5). The synthetic utility of the present glycosidation method was demonstrated by a stereoselective synthesis of mucin-type glycopeptide core 5 and core 7 building blocks, which are suitable for Fmoc-based solid-phase synthesis of O-glycopeptides. (C) 2012 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2012.04.059
• 作为产物：
  描述：

  (tert-butyldimethyl)silyl 2-azido-4,6-O-benzylidene-2-deoxy-β-D-galactopyranoside 、 氯乙酰氯 在 吡啶 作用下， 以 二氯甲烷 为溶剂， 反应 0.25h， 以99%的产率得到tert-butyldimethylsilyl 2-azido-4,6-O-benzylidene-3-O-(2-chloroacetyl)-2-deoxy-β-D-galactopyranoside
  参考文献：
  名称：

  A stereocontrolled construction of 2-azido-2-deoxy-1,2-cis-α-galactosidic linkages utilizing 2-azido-4,6-O-benzylidene-2-deoxygalactopyranosyl diphenyl phosphates: stereoselective synthesis of mucin core 5 and core 7 structures

  摘要：

  TMSOTf-promoted glycosidation of 2-azido-4,6-O-benzylidene-2-deoxygalactosyl diphenyl phosphates with fluorenylmethoxycarbonyl (Fmoc)-protected serine and threonine derivatives in THF/Et2O (1:1) gave glycosyl amino acids in high yields and with excellent levels of alpha-selectivity (alpha/beta=94:6-95:5). The synthetic utility of the present glycosidation method was demonstrated by a stereoselective synthesis of mucin-type glycopeptide core 5 and core 7 building blocks, which are suitable for Fmoc-based solid-phase synthesis of O-glycopeptides. (C) 2012 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2012.04.059