phenyl 3,4-O-isopropylidene-2-O-(2-naphthyl)methyl-1-thio-β-L-fucopyranoside | 848416-54-6

• 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-isopropylidene-2-O-(2-naphthyl)methyl-1-thio-β-L-fucopyranoside
• CAS: 848416-54-6
• 化学式: C₂₆H₂₈O₄S
• 分子量: 436.572
• InChiKey: XWJDQFFZIPRDLI-VUSSFZIGSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.78
• 重原子数：
  31.0
• 可旋转键数：
  5.0
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.38
• 拓扑面积：
  36.92
• 氢给体数：
  0.0
• 氢受体数：
  5.0

反应信息

• 作为反应物：
  描述：

  phenyl 3,4-O-isopropylidene-2-O-(2-naphthyl)methyl-1-thio-β-L-fucopyranoside 在 盐酸 作用下， 以 甲醇 、 水 为溶剂， 反应 2.0h， 以91%的产率得到phenyl 2-O-(2-naphthyl)methyl-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
• 作为产物：
  描述：

  phenyl 6-deoxy-1-thio-β-L-galactopyranoside 在 sodium hydride 、 对甲苯磺酸 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 反应 50.0h， 生成 phenyl 3,4-O-isopropylidene-2-O-(2-naphthyl)methyl-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