methyl 2,3,4-tri-O-benzyl-6-O-(methyl 5-acetamido-4,7,8,9-tetra-O-acetyl-3,5-dideoxy-α-D-glycero-D-galacto-2-nonulopyranosylonate)-α-D-glucopyranoside | 109681-25-6

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: methyl 2,3,4-tri-O-benzyl-6-O-(methyl 5-acetamido-4,7,8,9-tetra-O-acetyl-3,5-dideoxy-α-D-glycero-D-galacto-2-nonulopyranosylonate)-α-D-glucopyranoside
• 英文别名: methyl O--(2->6)-2,3,4-tri-O-benzyl-α-D-glucopyranoside；[methyl 5-acetamido-4,7,8,9-tetra-O-acetyl-3,5-dideoxy-D-glycero-α-D-galacto-2-nonulopyranosonate]-(2->6)-methyl 2,3,4-tri-O-benzyl-α-D-glucopyranoside；methyl (2R,4S,5R,6R)-5-acetamido-4-acetyloxy-2-[[(2R,3R,4S,5R,6S)-6-methoxy-3,4,5-tris(phenylmethoxy)oxan-2-yl]methoxy]-6-[(1S,2R)-1,2,3-triacetyloxypropyl]oxane-2-carboxylate
• CAS: 109681-25-6
• 化学式: C₄₈H₅₉NO₁₈
• 分子量: 937.992
• InChiKey: BOUWOVPSJSQLNM-XHYGFDHHSA-N

物化性质

• 沸点：
  912.6±65.0 °C(Predicted)
• 密度：
  1.30±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.1
• 重原子数：
  67
• 可旋转键数：
  27
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  225
• 氢给体数：
  1
• 氢受体数：
  18

反应信息

• 作为反应物：
  描述：

  methyl 2,3,4-tri-O-benzyl-6-O-(methyl 5-acetamido-4,7,8,9-tetra-O-acetyl-3,5-dideoxy-α-D-glycero-D-galacto-2-nonulopyranosylonate)-α-D-glucopyranoside 在 potassium tert-butylate 作用下， 以 甲醇 为溶剂， 反应 1.0h， 生成 methyl 5-acetamido-3,5-dideoxy-D-glycero-α-D-galactonon-2-ulopyranosylonate-(2->6)-methyl 2,3,4-tri-O-benzyl-α-D-glucopyranoside
  参考文献：
  名称：

  3β-羟基唾液酸糖苷。I.钙结合能力以及化学和酶稳定性。

  摘要：

  制备了N-乙酰神经氨酸（Neu5Ac）和N-乙酰基-3β-羟基神经氨酸（Neu5Acβ3OH）（1-4）的甲基α-和β-糖苷，以评估它们的钙结合能力。还分别合成了Neu5Ac和Neu5Ac beta 3OH（5-10）的（甲基α-葡萄糖基吡喃糖苷基）α-和β-和4-甲基伞形基α-糖苷，分别用于化学和酶稳定性的比较。Neu5Ac和Neu5Ac beta 3OH的甲基β-糖苷3和4，分别显示出强烈的钙结合能力，而在相应的α-糖苷1和2中未观察到这种能力.Neu5Ac beta 3OH糖苷6,8和10相比，相应的Neu5Ac糖苷5、7和9对酸性水解和唾液酸酶消化的抵抗力强得多。

  DOI：

  10.1248/cpb.40.2728
• 作为产物：
  描述：

  甲基2,3,4-三-O-苄基-α-D-吡喃葡萄糖苷 在 disodium hydrogenphosphate 、 偶氮二异丁腈 、 三正丁基氢锡 、 silver trifluoromethanesulfonate 作用下， 以 1,2-二氯乙烷 、 甲苯 为溶剂， 反应 18.33h， 生成 methyl 2,3,4-tri-O-benzyl-6-O-(methyl 5-acetamido-4,7,8,9-tetra-O-acetyl-3,5-dideoxy-α-D-glycero-D-galacto-2-nonulopyranosylonate)-α-D-glucopyranoside
  参考文献：
  名称：

  Efficient Synthesis of 2α-Glycoside ofN-Acetylneuraminic Acid via Phenylsulfenyl Chloride Adduct of 2-Deoxy-2,3-dehydro-N-acetylneuraminic Acid Methyl Ester Tetra-O-acetate

  摘要：

  苯硫氯代物与2-脱氧-2,3-脱氢-N-乙酰神经氨酸衍生物结合，主要生成相应的2-氯-3β-苯硫基衍生物，后者是制备唾液酸α-糖苷的极佳糖基供体。

  DOI：

  10.1246/cl.1988.1657

文献信息

• Benzeneselenenyl triflate as an activator of thioglycosides for glycosylation reactions
  作者：Yukishige Ito、Tomoya Ogawa、Masaaki Numata、Mamoru Sugimoto

  DOI：10.1016/0008-6215(90)84078-9

  日期：1990.7

  A new method for the activation of thioglycosides was developed by use of benzeneselenenyl triflate (PhSeOTf), which, upon reaction with either a primary or secondary sugar HO-group, afforded O-glycosides under extremely mild reaction conditions. The reaction was applicable to various l-thiohexosides 2-6 as well as to a 2-thioglycoside 20 derived from N-acetylneuraminic acid (NeuAc).

  通过使用苯硒烯基三氟甲磺酸酯（PhSeOTf），开发了一种活化硫代糖苷的新方法，该方法与伯或仲糖HO-基团反应后，在极其温和的反应条件下提供了O-糖苷。该反应适用于各种1-硫代己糖苷2-6以及衍生自N-乙酰神经氨酸（NeuAc）的2-硫代糖苷20。
• One-Pot Synthesis of Sialo-Containing Glycosyl Amino Acids by Use of anN-Trichloroethoxycarbonyl-?-thiophenyl Sialoside
  作者：Hiroshi Tanaka、Masaatsu Adachi、Takashi Takahashi

  DOI：10.1002/chem.200400840

  日期：2005.1.21

  We describe an efficient synthesis of 2,6- and 2,3-sialyl T antigens linked to serine in a one-pot glycosylation. We first investigated the glycosidation of thiosialosides by varying the N-protecting group. Modification of the C-5 amino group of beta-thiosialosides into the N-9-fluorenylmethoxycarbonyl, N-2,2,2-trichloroethoxycarbonyl (N-Troc), and N-trichloroacetyl derivatives enhanced the reactivity

  我们描述了一个锅糖基化中的丝氨酸连接的2,6-和2,3-唾液酸T抗原的有效合成。我们首先通过改变N保护基研究了硫代唾液酸苷的糖基化。将β-硫代唾液酸的C-5氨基修饰为N-9-芴基甲氧基羰基，N-2,2,2-三氯乙氧基羰基（N-Troc）和N-三氯乙酰基衍生物可增强这些化合物对糖基化的反应性。最少加入3 A分子筛也可有效提高α-连接的唾液酸苷的收率。接下来，我们使用N-Troc唾液酸供体一锅合成糖基氨基酸。N-Troc衍生物可以被转化为N-乙酰基衍生物而无需氨基酸的外消旋化。分支型一锅糖基化，通过3，6-二羟基半乳糖苷与N-Troc-β-硫代苯基唾液酸的区域选择性糖基化作用引发的β-环糊精以良好的产率提供了被保护的2，6-唾液酸T抗原。由半乳糖基氟化物与N-Troc-β-硫代苯基唾液酸苷的化学选择性糖基化作用引发的线性型一锅糖基化，以优异的产率提供了受保护的2，3-唾液酸T抗原。将两个受保护
• Sim, Mui Mui; Kondo, Hirosato; Wong, Chi-Huey, Journal of the American Chemical Society, 1993, vol. 115, # 6, p. 2260 - 2267
  作者：Sim, Mui Mui、Kondo, Hirosato、Wong, Chi-Huey

  DOI：——

  日期：——
• Donor‐Reactivity‐Controlled Sialylation Reactions
  作者：Kesatebrhan Haile Asressu、Chun‐Wei Chang、Sarah Lam、Cheng‐Chung Wang

  DOI：10.1002/ejoc.202100718

  日期：2021.8.26

  AbstractAlthough tremendous efforts have been made for the efficient preparation of sialosides, controlling the stereochemical outcome of sialylation reaction still remains one of the most challenging tasks due to the unique chemical structure of sialic acid. We developed a new strategy to statistically analyze the stereoselectivity of sialylation reactions on six types of p‐tolyl thiosialosides in NIS/TfOH system using Relative Reactivity Value (RRV) as the indicator. Analysis of the reaction mechanism showed the formation of the relatively stable glycosyl bromide and glycosyl chloride intermediates from halide‐ and triflate‐containing promotors in the absence of an acceptor. We found that the α/β‐stereoselectivity, yields, and intermediate changes were associated with their donor reactivity. These findings enable to tailor the most suitable building blocks for stereo‐controlled sialylation reactions.
• A stereospecific β-glycosylation of 2β,3α-dibromo-n-acetylneuraminic acid
  作者：Kaoru Okamoto、Tadao Kondo、Toshio Goto

  DOI：10.1016/s0040-4020(01)87796-6

  日期：——