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p-methoxyphenyl 2-O-benzyl-β-d-galactopyranoside | 1196690-73-9

中文名称
——
中文别名
——
英文名称
p-methoxyphenyl 2-O-benzyl-β-d-galactopyranoside
英文别名
——
p-methoxyphenyl 2-O-benzyl-β-d-galactopyranoside化学式
CAS
1196690-73-9
化学式
C20H24O7
mdl
——
分子量
376.406
InChiKey
BLYKEOLUUOOYOS-LCWAXJCOSA-N
BEILSTEIN
——
EINECS
——
  • 物化性质
  • 计算性质
  • ADMET
  • 安全信息
  • SDS
  • 制备方法与用途
  • 上下游信息
  • 反应信息
  • 文献信息
  • 表征谱图
  • 同类化合物
  • 相关功能分类
  • 相关结构分类

物化性质

  • 沸点:
    583.4±50.0 °C(Predicted)
  • 密度:
    1.33±0.1 g/cm3(Temp: 20 °C; Press: 760 Torr)(Predicted)

计算性质

  • 辛醇/水分配系数(LogP):
    1.1
  • 重原子数:
    27.0
  • 可旋转键数:
    7.0
  • 环数:
    3.0
  • sp3杂化的碳原子比例:
    0.4
  • 拓扑面积:
    97.61
  • 氢给体数:
    3.0
  • 氢受体数:
    7.0

上下游信息

  • 上游原料
    中文名称 英文名称 CAS号 化学式 分子量

反应信息

  • 作为反应物:
    描述:
    p-methoxyphenyl 2-O-benzyl-β-d-galactopyranosideN-碘代丁二酰亚胺silver trifluoromethanesulfonate乙酸肼对甲苯磺酸 作用下, 以 甲醇二氯甲烷N,N-二甲基甲酰胺 为溶剂, 生成 p-methoxyphenyl 2-O-benzoyl-5,6-O-isopropylidene-β-D-galactofuranosyl-(1->3)-2-O-benzyl-4,6-O-benzylidene-β-D-galactopyranoside
    参考文献:
    名称:
    Synthesis of tetra- and hexasaccharide fragments corresponding to the O-antigenic polysaccharide of Klebsiella pneumoniae
    摘要:
    The preparation of linear tetra- (1) and hexasaccharides (2), containing the repeating unit [-> 3)-beta-Galf-(1 -> 3)-alpha-Galp-(1 -> ] present in the O-polysaccharide of the lipopolysaccharide of Klebsiella pneumoniae is described. The key step in their synthesis is the alpha-selective galactopyranosylation of 3-OH di- and tetrasaccharide acceptors (20 and 22) with a disaccharide trichloroacetimidate donor 19 in the presence of trimethylsilyl triflate in a diethyl ether-CH2Cl2 mixture as solvent. (C) 2012 Elsevier Ltd. All rights reserved.
    DOI:
    10.1016/j.tet.2012.03.074
  • 作为产物:
    描述:
    参考文献:
    名称:
    Synthesis of tetra- and hexasaccharide fragments corresponding to the O-antigenic polysaccharide of Klebsiella pneumoniae
    摘要:
    The preparation of linear tetra- (1) and hexasaccharides (2), containing the repeating unit [-> 3)-beta-Galf-(1 -> 3)-alpha-Galp-(1 -> ] present in the O-polysaccharide of the lipopolysaccharide of Klebsiella pneumoniae is described. The key step in their synthesis is the alpha-selective galactopyranosylation of 3-OH di- and tetrasaccharide acceptors (20 and 22) with a disaccharide trichloroacetimidate donor 19 in the presence of trimethylsilyl triflate in a diethyl ether-CH2Cl2 mixture as solvent. (C) 2012 Elsevier Ltd. All rights reserved.
    DOI:
    10.1016/j.tet.2012.03.074
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文献信息

  • β-Rhamnosides from 6-thio mannosides
    作者:Alphert E. Christina、Daan van der Es、Jasper Dinkelaar、Hermen S. Overkleeft、Gijsbert A. van der Marel、Jeroen D. C. Codée
    DOI:10.1039/c2cc17623h
    日期:——
    Upon condensation of 6-thio-6-deoxy-mannosyl donors 1,2-cis products are obtained with a high degree of stereoselectivity. Subsequent reductive removal of the 6-thio functionality gives 1,2-cisrhamnosides. The 1,2-cis-selectivity can be rationalized with a product forming 3H4-oxocarbenium, which is in equilibrium with a bridged sulfonium intermediate.
    当6--6-脱氧甘露糖供体进行缩合时,会高度立体选择性地得到1,2-顺式产物。随后通过还原性移除6-功能基团,生成1,2-顺式鼠李糖苷。1,2-顺式选择性可通过生成产物形式的3H4-氧碳鎓离子来合理化,这一离子与桥连的鎓中间体处于平衡状态。
  • Regioselective Acylation of Diols and Triols: The Cyanide Effect
    作者:Peng Peng、Michael Linseis、Rainer F. Winter、Richard R. Schmidt
    DOI:10.1021/jacs.6b02454
    日期:2016.5.11
    positioned hydroxy groups. As cyanide is capable of various kinds of hydrogen bonding and as it is a quite strong sterically nondemanding base, regioselective O-acylations should be possible at low temperatures even at sterically congested positions, thus permitting formation and also isolation of the kinetic product. Indeed, 1,2-cis-diols, having an equatorial and an axial hydroxy group, benzoyl cyanide
    碳水化合物化学的中心主题包括碳水化合物的结构修饰和寡糖合成。两者都需要受区域选择性保护的构建块,这些构建块主要通过间接多步程序获得。因此,需要针对特定​​羟基的直接保护方法。双氢键最终将区分不同位置的羟基。由于化物能够形成各种氢键,并且它是一种非常强的空间要求不高的碱,因此即使在空间拥挤的位置,也应该可以在低温下进行区域选择性 O-酰化,从而允许形成和分离动力学产物。实际上,具有赤道和轴羟基的 1,2-顺式二醇、苯甲酰或乙酰作为酰化剂,和 DMAP 作为催化剂在 -78°C 下产率热力学上不利的轴向 O-酰化产物;在这些条件下未观察到酰基迁移。这种现象被 3,4-O-未保护的半乳糖喃岩藻糖苷以及 2,3-O-未保护的甘露糖苷证实。即使对于作为三醇的 3,4,6-O-未保护的喃半乳糖苷,轴向 4-O-酰化也明显快于伯 6-羟基的 O-酰化。氢键对这种不寻常的区域选择性的重要性可以通过
  • Convergent Synthesis of the Nonreducing Hexasaccharide Fragment and the Dodecasaccharide Scaffold of Marine Lipopolysaccharide Axinelloside A
    作者:Changgen Zeng、Haoliang Zhang、Dapeng Zhu、Biao Yu
    DOI:10.1002/chem.202400075
    日期:2024.3.25
    Abstract

    A convergent synthesis of the dodecasaccharide scaffold of axinelloside A was achieved through Au(I)‐catalyzed [6+6] glycosylation. The initially devised [3+1+2] assembly of the nonreducing hexasaccharide fragment was low‐yielding, whereas a convergent [3+3] glycosylation under Au(I) catalysis was proven feasible, allowing for a semi‐gram scale preparation of the wanted hexasaccharide. The requisite 1,2‐cis glycosidic bonds were forged in a highly stereoselective fashion by virtue of remote acetyl group participation, and judicious manipulation of protecting groups. The synthetic dodecasaccharide has been properly protected for the downstream elaboration toward its natural form.

    摘要 通过(I)催化的[6+6]糖基化,实现了斧叶皂甙 A 十二糖支架的聚合合成。最初设计的非还原性六糖片段的[3+1+2]组装产量较低,而在 Au(I)催化下的[3+3]聚合糖基化被证明是可行的,从而可以半克规模制备所需的六糖。通过乙酰基的远程参与和保护基团的明智操作,以高度立体选择性的方式形成了所需的 1,2-顺式糖苷键。合成的十二糖得到了适当的保护,以便向其天然形式的下游发展。
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