methyl 3,4,6-tri-O-benzyl-2-O-(2-naphthylmethyl)-1-thio-α-D-mannopyranoside | 1350309-46-4

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: methyl 3,4,6-tri-O-benzyl-2-O-(2-naphthylmethyl)-1-thio-α-D-mannopyranoside
• 英文别名: (2R,3S,4S,5R,6R)-2-methylsulfanyl-3-(naphthalen-2-ylmethoxy)-4,5-bis(phenylmethoxy)-6-(phenylmethoxymethyl)oxane
• CAS: 1350309-46-4
• 化学式: C₃₉H₄₀O₅S
• 分子量: 620.81
• InChiKey: QDLPEULJYVMLCM-WEMFOFRKSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  7.6
• 重原子数：
  45
• 可旋转键数：
  14
• 环数：
  6.0
• sp3杂化的碳原子比例：
  0.28
• 拓扑面积：
  71.4
• 氢给体数：
  0
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  methyl 3,4,6-tri-O-benzyl-2-O-(2-naphthylmethyl)-1-thio-α-D-mannopyranoside 、 4-甲氧苯基-3,6-二-O-苄基-2-脱氧-2-苯二甲酰亚氨基-β-D-吡喃葡萄糖苷 在 2,3-二氯-5,6-二氰基-1,4-苯醌 作用下， 以 二氯甲烷 为溶剂， 反应 4.0h， 以92%的产率得到
  参考文献：
  名称：

  Synthetic Study and Structural Analysis of the Antifreeze Agent Xylomannan from Upis ceramboides

  摘要：

  The novel antifreeze factor, xylomannan, first isolated from the freeze-tolerant Alaskan beetle Upis ceramboides, demonstrates a high degree of thermal hysteresis, comparable to that of the most active insect antifreeze proteins. Although the presence of a lipid component in this factor has not yet been verified, it has been proposed that the glycan backbone consists of a beta-D-mannopyranosyl-(1 -> 4)-beta-D-xylopyranose-disaccharide-repeating structure according to MS and NMR analyses. In this contribution, we report the stereoselective synthesis of the tetrasaccharide beta-D-mannopyranosyl-(1 -> 4)-beta-D-xylopyranosyl-(1 -> 4)-beta-D-mannopyranosyl-(1 -> 4)-D-xylopyranoside, a structural component of xylomannan. Our synthesis features the use of 2-naphthylmethyl (NAP)-ether-mediated intramolecular aglycon delivery (IAD) as the key reaction in obtaining beta-mannopyranoside stereoselectively. Various donors for NAP-IAD were tested to determine the most suitable for the purposes of this synthesis. Fragment coupling between a disaccharyl fluoride and a disaccharide acceptor obtained from a common beta-D-mannopyranosyl-(1 -> 4)-beta-D-xylopyranoside derivative was successfully carried out to afford the desired tetrasaccharide in the presence of Cp2HfCl2-AgClO4. Structural analysis of the resulting synthetic tetrasaccharide using NMR techniques and molecular modeling was performed in order to demonstrate the presence of the proposed xylomannan linkages in this molecule.

  DOI：

  10.1021/ja208528c
• 作为产物：
  描述：

  methyl 4,6-O-benzylidene-1-thio-α-D-mannopyranoside 在 咪唑 、 三乙基硅烷 、 四丁基氟化铵 、 sodium hydride 、 三氟乙酸 作用下， 以 四氢呋喃 、 二氯甲烷 、 N,N-二甲基甲酰胺 为溶剂， 反应 62.0h， 生成 methyl 3,4,6-tri-O-benzyl-2-O-(2-naphthylmethyl)-1-thio-α-D-mannopyranoside
  参考文献：
  名称：

  Synthetic Study and Structural Analysis of the Antifreeze Agent Xylomannan from Upis ceramboides

  摘要：

  The novel antifreeze factor, xylomannan, first isolated from the freeze-tolerant Alaskan beetle Upis ceramboides, demonstrates a high degree of thermal hysteresis, comparable to that of the most active insect antifreeze proteins. Although the presence of a lipid component in this factor has not yet been verified, it has been proposed that the glycan backbone consists of a beta-D-mannopyranosyl-(1 -> 4)-beta-D-xylopyranose-disaccharide-repeating structure according to MS and NMR analyses. In this contribution, we report the stereoselective synthesis of the tetrasaccharide beta-D-mannopyranosyl-(1 -> 4)-beta-D-xylopyranosyl-(1 -> 4)-beta-D-mannopyranosyl-(1 -> 4)-D-xylopyranoside, a structural component of xylomannan. Our synthesis features the use of 2-naphthylmethyl (NAP)-ether-mediated intramolecular aglycon delivery (IAD) as the key reaction in obtaining beta-mannopyranoside stereoselectively. Various donors for NAP-IAD were tested to determine the most suitable for the purposes of this synthesis. Fragment coupling between a disaccharyl fluoride and a disaccharide acceptor obtained from a common beta-D-mannopyranosyl-(1 -> 4)-beta-D-xylopyranoside derivative was successfully carried out to afford the desired tetrasaccharide in the presence of Cp2HfCl2-AgClO4. Structural analysis of the resulting synthetic tetrasaccharide using NMR techniques and molecular modeling was performed in order to demonstrate the presence of the proposed xylomannan linkages in this molecule.

  DOI：

  10.1021/ja208528c

文献信息

• Binding Evaluation of Pradimicins for Oligomannose Motifs from Fungal Mannans
  作者：Yu Nakagawa、Fumiya Yamaji、Wataru Miyanishi、Makoto Ojika、Yasuhiro Igarashi、Yukishige Ito

  DOI：10.1246/bcsj.20200305

  日期：2021.3.15

  Pradimicins (PRMs) are a unique family of natural products that exhibit antifungal activity via binding to cell wall mannans of fungi. Although their mannan-targeted antifungal action has attracted considerable interest, there is still only limited knowledge as to how PRMs bind to mannans. In this study, we evaluated the relative binding affinity of PRMs for synthetic oligomannoses, which reflect the

  Pradimicins（PRMs）是独特的天然产物家族，通过与真菌的细胞壁甘露聚糖结合，具有抗真菌活性。尽管以甘露聚糖为目标的抗真菌作用引起了极大的兴趣，但关于PRM如何与甘露聚糖结合的知识仍然有限。在这项研究中，我们评估了PRM对合成寡甘露糖的相对结合亲和力，反映了白色念珠菌细胞壁甘露聚糖的结构基序特征。。两种互补结合测定法显示，PRM对于非还原端带有多个甘露糖残基的分支寡甘露糖基序具有强烈的偏好。另外，发现低聚甘露糖模拟物（其中两个甘露糖被聚乙二醇间隔基桥接）在两种测定法中的行为类似于两分支的低聚甘露糖。这些结果表明，通过同时识别多个末端甘露糖残基，PRMs优先结合真菌甘露聚糖的高度分支区域。
• Synthetic Study and Structural Analysis of the Antifreeze Agent Xylomannan from Upis ceramboides
  作者：Akihiro Ishiwata、Ayaka Sakurai、Yoshiyuki Nishimiya、Sakae Tsuda、Yukishige Ito

  DOI：10.1021/ja208528c

  日期：2011.12.7

  The novel antifreeze factor, xylomannan, first isolated from the freeze-tolerant Alaskan beetle Upis ceramboides, demonstrates a high degree of thermal hysteresis, comparable to that of the most active insect antifreeze proteins. Although the presence of a lipid component in this factor has not yet been verified, it has been proposed that the glycan backbone consists of a beta-D-mannopyranosyl-(1 -> 4)-beta-D-xylopyranose-disaccharide-repeating structure according to MS and NMR analyses. In this contribution, we report the stereoselective synthesis of the tetrasaccharide beta-D-mannopyranosyl-(1 -> 4)-beta-D-xylopyranosyl-(1 -> 4)-beta-D-mannopyranosyl-(1 -> 4)-D-xylopyranoside, a structural component of xylomannan. Our synthesis features the use of 2-naphthylmethyl (NAP)-ether-mediated intramolecular aglycon delivery (IAD) as the key reaction in obtaining beta-mannopyranoside stereoselectively. Various donors for NAP-IAD were tested to determine the most suitable for the purposes of this synthesis. Fragment coupling between a disaccharyl fluoride and a disaccharide acceptor obtained from a common beta-D-mannopyranosyl-(1 -> 4)-beta-D-xylopyranoside derivative was successfully carried out to afford the desired tetrasaccharide in the presence of Cp2HfCl2-AgClO4. Structural analysis of the resulting synthetic tetrasaccharide using NMR techniques and molecular modeling was performed in order to demonstrate the presence of the proposed xylomannan linkages in this molecule.