phenyl 3,4-O-endo-(2-naphthyl)methylene-1-thio-β-L-fucopyranoside | 848416-58-0

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: phenyl 3,4-O-endo-(2-naphthyl)methylene-1-thio-β-L-fucopyranoside
• CAS: 848416-58-0
• 化学式: C₂₃H₂₂O₄S
• 分子量: 394.491
• InChiKey: BBKHXZOPGXAYRI-DWGZIRAKSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.52
• 重原子数：
  28.0
• 可旋转键数：
  3.0
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.3
• 拓扑面积：
  47.92
• 氢给体数：
  1.0
• 氢受体数：
  5.0

反应信息

• 作为反应物：
  描述：

  phenyl 3,4-O-endo-(2-naphthyl)methylene-1-thio-β-L-fucopyranoside 在 lithium aluminium tetrahydride 、 三氯化铝 、 4 A molecular sieve 、 sodium hydride 、 2,3-二氯-5,6-二氰基-1,4-苯醌 作用下， 以 甲醇 、 乙醚 、 二氯甲烷 、 N,N-二甲基甲酰胺 为溶剂， 反应 7.58h， 生成 methyl 2,3-di-O-benzyl-α-L-fucopyranosyl-(1->2)-3,4,6-tri-O-benzyl-β-D-galactopyranoside
  参考文献：
  名称：

  Synthesis of fully protected α-l-fucopyranosyl-(1→2)-β-d-galactopyranosides with a single free hydroxy group at position 2′, 3′ or 4′ using O-(2-naphthyl)methyl (NAP) ether as a temporary protecting group

  摘要：

  Perbenzylated methyl alpha-L-fucopyranosyl-(1-->2)-beta-D-galactopyranosides having a single free OH group at position C-2'. C-3' or C-4' have been synthesized. Methyl 3,4,6-tri-O-benzyl-beta-D-galactopyranoside was glyco-sylated either with phenyl 3,4-di-O-benzyl-2-O-(2-naphthyl)-methyl-, phenyl 2,4-di-O-benzyl-3-O-(2-naphthyl)methyl- or phenyl 2,3-di-O-benzyl-4-O-(2-naphthyl)methyl-1-thio-beta-L-fucopyranoside. The 2-ONAP ether functioned well as a non-participating group. The yields of the glycosylation reactions, promoted by NIS/TfOH, were above 80% and the stereoselectivity was 8:1 to 10:1 in favour of the alpha-anomers. The 2-ONAP ether was obtained by (2-naphthyl)methylation, the 3-ONAP and the 4-ONAP ethers were prepared either by hydrogenolysis of the 3,4-O-(2-naphthyl)methylene acetals of beta-L-fucopyranoside or by tin acetal-mediated alkylations. The latter procedure afforded higher yields. The ONAP ethers from the disaccharides were removed by oxidative cleavage with DDQ. (C) 2004 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetasy.2004.11.056
• 作为产物：
  描述：

  phenyl 2,3,4-tri-O-acetyl-1-thio-L-fucopyranoside 在 D(+)-10-樟脑磺酸 、 sodium methylate 作用下， 以 甲醇 、 N,N-二甲基甲酰胺 为溶剂， 反应 168.0h， 生成 phenyl 3,4-O-endo-(2-naphthyl)methylene-1-thio-β-L-fucopyranoside
  参考文献：
  名称：

  Synthesis of fully protected α-l-fucopyranosyl-(1→2)-β-d-galactopyranosides with a single free hydroxy group at position 2′, 3′ or 4′ using O-(2-naphthyl)methyl (NAP) ether as a temporary protecting group

  摘要：

  Perbenzylated methyl alpha-L-fucopyranosyl-(1-->2)-beta-D-galactopyranosides having a single free OH group at position C-2'. C-3' or C-4' have been synthesized. Methyl 3,4,6-tri-O-benzyl-beta-D-galactopyranoside was glyco-sylated either with phenyl 3,4-di-O-benzyl-2-O-(2-naphthyl)-methyl-, phenyl 2,4-di-O-benzyl-3-O-(2-naphthyl)methyl- or phenyl 2,3-di-O-benzyl-4-O-(2-naphthyl)methyl-1-thio-beta-L-fucopyranoside. The 2-ONAP ether functioned well as a non-participating group. The yields of the glycosylation reactions, promoted by NIS/TfOH, were above 80% and the stereoselectivity was 8:1 to 10:1 in favour of the alpha-anomers. The 2-ONAP ether was obtained by (2-naphthyl)methylation, the 3-ONAP and the 4-ONAP ethers were prepared either by hydrogenolysis of the 3,4-O-(2-naphthyl)methylene acetals of beta-L-fucopyranoside or by tin acetal-mediated alkylations. The latter procedure afforded higher yields. The ONAP ethers from the disaccharides were removed by oxidative cleavage with DDQ. (C) 2004 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetasy.2004.11.056