4-pentenyl O-(2-acetamido-3,4,6-tri-O-acetyl-2-deoxy-β-D-glucopyranosyl)-(1->3)-O-(2,4,6-tri-O-acetyl-β-D-galactopyranosyl)-(1->4)-2,3,6-tri-O-acetyl-β-D-glucopyranoside | 928824-09-3

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 4-pentenyl O-(2-acetamido-3,4,6-tri-O-acetyl-2-deoxy-β-D-glucopyranosyl)-(1->3)-O-(2,4,6-tri-O-acetyl-β-D-galactopyranosyl)-(1->4)-2,3,6-tri-O-acetyl-β-D-glucopyranoside
• CAS: 928824-09-3
• 化学式: C₄₃H₆₁NO₂₅
• 分子量: 991.949
• InChiKey: VCPPFFAUUFKCQG-KRTWWSHESA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.3
• 重原子数：
  69.0
• 可旋转键数：
  22.0
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.72
• 拓扑面积：
  321.18
• 氢给体数：
  1.0
• 氢受体数：
  25.0

反应信息

• 作为反应物：
  描述：

  4-pentenyl O-(2-acetamido-3,4,6-tri-O-acetyl-2-deoxy-β-D-glucopyranosyl)-(1->3)-O-(2,4,6-tri-O-acetyl-β-D-galactopyranosyl)-(1->4)-2,3,6-tri-O-acetyl-β-D-glucopyranoside 、 硫代乙酸 在 偶氮二异丁腈 作用下， 以 1,4-二氧六环 为溶剂， 反应 3.0h， 以87%的产率得到5-acetylthiopentyl (2-acetamido-3,4,6-tri-O-acetyl-2-deoxy-β-D-glucopyranosyl)-(1->3)-O-(2,4,6-tri-O-acetyl-β-D-galactopyranosyl)-(1->4)-2,3,6-tri-O-acetyl-β-D-glucopyranoside
  参考文献：
  名称：

  Lactotriaose-containing carbosilane dendrimers: Syntheses and lectin-binding activities

  摘要：

  Carbosilane dendrimers periphery-functionalized with lactotriaose (GlcNAc beta 1-3Gal beta l-4Glc) with valencies of three, four, six, and twelve were prepared for use in a lectin-binding assay. A lactotriaose derivative was prepared from D-glucosamine and D-lactose derivatives. The N-Troc-protected glucosamine glycosyl donor and 3'-O-unprotected lactose glycosyl acceptor were condensed in the presence of silver trifluoromethanesulfonate and methylsulfenyl bromide to provide corresponding trisaccharide with new beta-1-3 linkages in 92% yield. The protection group of the trisaccharide was transformed into an acetyl group. The 4-pentenyl glycoside was prepared from the acetate via glycosyl bromide. The alkene was converted into acetyl sulfide by addition of thioacetic acid under radical conditions. The lactotriaose unit was linked with carbosilane dendrimers to afford acelyl-protected glycodendrimers. De-O-acetylation of the dendrimers was carried out in the presence of sodium methoxide and then aq NaOH to give the desired lactotriaose clusters using a carbosilane dendrimer backbone. Their biological activities toward WGA were evaluated by fluorescence methods. The binding constants of free lactotriaose and trivalent, tetravalent, hexavalent, and dodecavalent glycodendrimers to WGA were determined to be 1.1 x 10(3), 4.4 x 10(4), 5.1 x 10(4), 2.8 x 10(6), and 1.3 x 10(6) M-1, respectively. The hexavalent glycodendrimer showed a 2500-fold larger binding effect than that of free lactotriaose. (c) 2006 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.bmc.2006.12.030
• 作为产物：
  描述：

  O-(2-acetamido-3,4,6-tri-O-acetyl-2-deoxy-β-D-glucopyranosyl)-(1->3)-O-(2,4,6-tri-O-acetyl-β-D-galactopyranosyl)-(1->4)-2,3,6-tri-O-acetyl-β-D-glucopyranosyl acetate 在 4 A molecular sieve 、 氢溴酸 、 碘 、 溶剂黄146 、 silver carbonate 作用下， 以 二氯甲烷 为溶剂， 反应 64.0h， 生成 4-pentenyl O-(2-acetamido-3,4,6-tri-O-acetyl-2-deoxy-β-D-glucopyranosyl)-(1->3)-O-(2,4,6-tri-O-acetyl-β-D-galactopyranosyl)-(1->4)-2,3,6-tri-O-acetyl-β-D-glucopyranoside
  参考文献：
  名称：

  Lactotriaose-containing carbosilane dendrimers: Syntheses and lectin-binding activities

  摘要：

  Carbosilane dendrimers periphery-functionalized with lactotriaose (GlcNAc beta 1-3Gal beta l-4Glc) with valencies of three, four, six, and twelve were prepared for use in a lectin-binding assay. A lactotriaose derivative was prepared from D-glucosamine and D-lactose derivatives. The N-Troc-protected glucosamine glycosyl donor and 3'-O-unprotected lactose glycosyl acceptor were condensed in the presence of silver trifluoromethanesulfonate and methylsulfenyl bromide to provide corresponding trisaccharide with new beta-1-3 linkages in 92% yield. The protection group of the trisaccharide was transformed into an acetyl group. The 4-pentenyl glycoside was prepared from the acetate via glycosyl bromide. The alkene was converted into acetyl sulfide by addition of thioacetic acid under radical conditions. The lactotriaose unit was linked with carbosilane dendrimers to afford acelyl-protected glycodendrimers. De-O-acetylation of the dendrimers was carried out in the presence of sodium methoxide and then aq NaOH to give the desired lactotriaose clusters using a carbosilane dendrimer backbone. Their biological activities toward WGA were evaluated by fluorescence methods. The binding constants of free lactotriaose and trivalent, tetravalent, hexavalent, and dodecavalent glycodendrimers to WGA were determined to be 1.1 x 10(3), 4.4 x 10(4), 5.1 x 10(4), 2.8 x 10(6), and 1.3 x 10(6) M-1, respectively. The hexavalent glycodendrimer showed a 2500-fold larger binding effect than that of free lactotriaose. (c) 2006 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.bmc.2006.12.030