tert-butyldimethylsilyl 2-azido-4,6-O-benzylidene-2-deoxy-3-O-(2-naphthyl)methyl-β-D-galactopyranoside | 1218904-41-6

• 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-2-deoxy-3-O-(2-naphthyl)methyl-β-D-galactopyranoside
• CAS: 1218904-41-6
• 化学式: C₃₀H₃₇N₃O₅Si
• 分子量: 547.726
• InChiKey: DGCBSWJWIRBHFI-GLAVCGJZSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  7.26
• 重原子数：
  39.0
• 可旋转键数：
  7.0
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.47
• 拓扑面积：
  94.91
• 氢给体数：
  0.0
• 氢受体数：
  6.0

反应信息

• 作为反应物：
  描述：

  tert-butyldimethylsilyl 2-azido-4,6-O-benzylidene-2-deoxy-3-O-(2-naphthyl)methyl-β-D-galactopyranoside 在 三乙基硅烷 、 三氟乙酸 作用下， 以 二氯甲烷 为溶剂， 以81%的产率得到
  参考文献：
  名称：

  De Novo Synthesis of a 2-Acetamido-4-amino-2,4,6-trideoxy-d-galactose (AAT) Building Block for the Preparation of a Bacteroides fragilis A1 Polysaccharide Fragment

  摘要：

  Zwitterionic polysaccharides (ZPSs) are potent T-cell activators that naturally occur on the cell surface of bacteria and show potential as immunostimulatory agents. An unusual, yet important component of many ZPSs is 2-acetamido-4-amino-2,4,6-trideoxy-D-galactose (AAT). AAT building block 2 was prepared via a de novo synthesis from N-Cbz-L-threonine 5. Furthermore, building block 2 was used to synthesize disaccharide 15 that constitutes a fragment of zwitterionic polysaccharide A1 (PS A1) found in Bacteroides fragilis.

  DOI：

  10.1021/ol1003912
• 作为产物：
  描述：

  (tert-butyldimethyl)silyl 2-azido-4,6-O-benzylidene-2-deoxy-β-D-galactopyranoside 、 2-溴甲基萘 在 sodium hydride 作用下， 以 四氢呋喃 、 mineral oil 为溶剂， 以84%的产率得到tert-butyldimethylsilyl 2-azido-4,6-O-benzylidene-2-deoxy-3-O-(2-naphthyl)methyl-β-D-galactopyranoside
  参考文献：
  名称：

  De Novo Synthesis of a 2-Acetamido-4-amino-2,4,6-trideoxy-d-galactose (AAT) Building Block for the Preparation of a Bacteroides fragilis A1 Polysaccharide Fragment

  摘要：

  Zwitterionic polysaccharides (ZPSs) are potent T-cell activators that naturally occur on the cell surface of bacteria and show potential as immunostimulatory agents. An unusual, yet important component of many ZPSs is 2-acetamido-4-amino-2,4,6-trideoxy-D-galactose (AAT). AAT building block 2 was prepared via a de novo synthesis from N-Cbz-L-threonine 5. Furthermore, building block 2 was used to synthesize disaccharide 15 that constitutes a fragment of zwitterionic polysaccharide A1 (PS A1) found in Bacteroides fragilis.

  DOI：

  10.1021/ol1003912

文献信息

• The application of 2,2,2-trichloroethyl sulfate to the synthesis of chondroitin sulfate C and D
  作者：Kenya Matsushita、Tomomi Nakata、Jun-ichi Tamura

  DOI：10.1016/j.carres.2015.01.007

  日期：2015.4

  Chondroitin sulfates (CSs) have characteristic bioactivities that depend on sulfation patterns. Chemically synthesized CS oligosaccharides are valuable tools for elucidating the relationship between structures and bioactivities. 2,2,2-Trichloroethyl (TCE) sulfated sugars are highly soluble in nonpolar solvents, which is useful for the synthesis of sulfated oligosaccharides. We herein synthesized CS-C [βGalNAc6S(1-4)βGlcA] (1) and CS-D [βGalNAc6S(1-4)βGlcA2S] (2) disaccharides that possessed sulfate groups by TCE sulfation at O-6 of GalNAc and an additional sulfate group at O-2 of GlcA, respectively. We revealed the superior functionalities of TCE sulfates during the synthesis of CS-C and -D, despite the unwanted side reactions in the acetamido-containing substrate.