p-methoxyphenyl 3-O-allyl-2,4,6-tri-O-benzoyl-β-D-galactopyranoside | 488092-50-8

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: p-methoxyphenyl 3-O-allyl-2,4,6-tri-O-benzoyl-β-D-galactopyranoside
• 英文别名: [(2R,3S,4S,5R,6S)-3,5-dibenzoyloxy-6-(4-methoxyphenoxy)-4-prop-2-enoxyoxan-2-yl]methyl benzoate
• CAS: 488092-50-8
• 化学式: C₃₇H₃₄O₁₀
• 分子量: 638.671
• InChiKey: QSOLMPZSRPCZGD-FUOAFCACSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  7.1
• 重原子数：
  47
• 可旋转键数：
  16
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.22
• 拓扑面积：
  116
• 氢给体数：
  0
• 氢受体数：
  10

反应信息

• 作为反应物：
  描述：

  p-methoxyphenyl 3-O-allyl-2,4,6-tri-O-benzoyl-β-D-galactopyranoside 在 ammonium cerium(IV) nitrate 、 三氟甲磺酸 、 4 A molecular sieve 、 1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下， 以 二氯甲烷 、 水 、 1,2-二氯乙烷 、 甲苯 、 乙腈 为溶剂， 反应 1.5h， 生成 (2R,3R,4S,5S,6R)-2-(((2S,4aR,6S,7R,8R,8aR)-7-acetamido-6-(octyloxy)-2-phenylhexahydropyrano[3,2-d][1,3]dioxin-8-yl)oxy)-4-(allyloxy)-6-((benzoyloxy)methyl)tetrahydro-2H-pyran-3,5-diyl dibenzoate
  参考文献：
  名称：

  Chemoenzymatic synthesis of sulfated O-linked oligosaccharides: epitopes for MECA-79

  摘要：

  Sulfated oligosaccharides I,II and III, representatives of those found on L-selectin counterreceptors, have been efficiently prepared employing a combination of chemical and enzymatic synthetic methods. (C) 2002 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0040-4039(02)01795-1
• 作为产物：
  描述：

  4-methoxyphenyl 2,3,4,6-tetra-O-acetyl-β-D-galactopyranoside 在 sodium methylate 、 二正丁基氧化锡 作用下， 以 吡啶 、 甲醇 为溶剂， 反应 31.0h， 生成 p-methoxyphenyl 3-O-allyl-2,4,6-tri-O-benzoyl-β-D-galactopyranoside
  参考文献：
  名称：

  A practical synthesis of β-d-GlcA-(1→3)-β-d-Gal-(1→3)-β-d-Gal-(1→4)-d-Xyl, a part of the common linkage region of a glycosaminoglycan

  摘要：

  A practical synthesis of beta-D-GlcA-(1 --> 3)-beta-D-Gal-(1 --> 3)-beta-D-Gal-(1 -->4)-beta-D-Xyl-(1 --> OMe) was achieved by coupling of methyl 2,3,4-tri-O-acetyl-alpha-D-glucopyranosyluronate trichloroacetimidate with a trisaccharide acceptor. The trisaccharide acceptor was obtained by condensation of 3-O-allyl-2,4,6-tri-O-benzoyl-beta-D-galactopyranosyl-(1 --> 3)-2,4,6-tri-O-benzoyl-alpha-D-galactopyranosyl trichloroacetimidate with methyl 2,3-di-O-benzoyl-beta-D-xylopyranoside, followed by deallylation. The beta-(1 --> 3)-linked disaccharide was prepared readily with p-methoxyphenyl 3-O-allyl-2,4,6-tri-O-benzoyl-beta-D-galactopyranoside as the key synthon. The alpha-(1--> 3)-linkage was formed in considerable amount with galactose mono- and disaccharide trichloroacetimidate donors with C-2 neighboring group participation. CO 2002 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0008-6215(02)00169-6

文献信息

• A concise and practical synthesis of antigenic globotriose, α-d-Gal-(1→4)-β-d-Gal-(1→4)-β-d-Glc
  作者：Langqiu Chen、Xing-E. Zhao、Duan Lai、Zhiwei Song、Fanzuo Kong

  DOI：10.1016/j.carres.2006.03.029

  日期：2006.7

  A concise and practical synthesis of the antigenic globotriose, alpha-D-Gal-(1 -> 4)-beta-D-Gal-(1 -> 4)-beta-D-Glc (13), was achieved by coupling of a monosaccharide donor, 3-O-allyl-2-O-benzoyl-4,6-O-benzylidene-alpha-D-galactopyranosyl trichloroacetimidate (4) with a disaccharide acceptor, p-methoxyphenyl 2,3,6-tri-O-benzoyl-beta-D-galactopyranosyl-(1 -> 4)-2,3,6-tri-O-benzoyl-beta-D-glucopyranoside (8), followed by deprotection. In spite of the existence of a C-2-ester substituent capable of neighboring-group participation in the donor, the coupling gave exclusively the alpha-linkage in satisfactory yield. The acceptor 8 was readily obtained from selective 3-O-benzoylation of the galactosyl. ring of p-methoxyphenyl 2,6-di-O-benzoyl-beta-D-galactopyranosyl-(1 -> 4)-2,3,6-tri-O-benzoyl-beta-D-glucopyranoside (7), which was prepared from p-methoxyphenyl beta-D-lactoside (5) via isopropylidenation, benzoylation, and deisopropylidenation. Donor 4 was obtained from p-methoxylphenyl 3-O-allyl-2,4,6-tri-O-benzoyl-beta-D-galactopyranoside (1) via selective 4,6-di-O-debenzoylation, oxidative removal of 1-O-MP, benzylidenation, and trichloroacetimidate formation. (c) 2006 Elsevier Ltd. All rights reserved.