methyl (benzyl 5-acetamido-4,7,8,9-tetra-O-acetyl-3,5-dideoxy-α-D-glycero-D-galacto-2-nonulopyranosid)onate | 19342-75-7

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: methyl (benzyl 5-acetamido-4,7,8,9-tetra-O-acetyl-3,5-dideoxy-α-D-glycero-D-galacto-2-nonulopyranosid)onate
• 英文别名: methyl (benzyl 5-acetamido-4,7,8,9-tetra-O-acetyl-3,5-dideoxy-D-glycero-α-D-galacto-2-nonulopyranosid)onate；methyl (2R,4S,5R,6R)-5-acetamido-4-acetyloxy-2-phenylmethoxy-6-[(1S,2R)-1,2,3-triacetyloxypropyl]oxane-2-carboxylate
• CAS: 19342-75-7
• 化学式: C₂₇H₃₅NO₁₃
• 分子量: 581.574
• InChiKey: PCDVSOJVTSULHL-XDRRYPFFSA-N

物化性质

• 沸点：
  672.9±55.0 °C(Predicted)
• 密度：
  1.29±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1.7
• 重原子数：
  41
• 可旋转键数：
  17
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.56
• 拓扑面积：
  179
• 氢给体数：
  1
• 氢受体数：
  13

反应信息

• 作为反应物：
  描述：

  methyl (benzyl 5-acetamido-4,7,8,9-tetra-O-acetyl-3,5-dideoxy-α-D-glycero-D-galacto-2-nonulopyranosid)onate 在 10percent Pd/C 吡啶 、 2,6-二叔丁基吡啶 、 三氟甲磺酸酐 、 氢气 、 N,N-二异丙基乙胺 、 三氟乙酸 作用下， 以 甲醇 、 二氯甲烷 、 乙腈 为溶剂， 反应 4.67h， 生成 diethyl [methyl (4,7,8,9-tetra-O-acetyl-3,5-dideoxy-5-ethoxycarbonylamino-D-glycero-β-D-galacto-2-nonulopyranosyl)onate] phosphite
  参考文献：
  名称：

  Base- and Sugar-Modified Cytidine MonophosphateN-Acetylneuraminic Acid (CMP-Neu5Ac) Analogues - Synthesis and Studies with α(2-6)-Sialyltransferase from Rat Liver

  摘要：

  The reaction of sialyl phosphites 1, 22a-d, 28, 39, and 45 with acyl-protected riboside 5-phosphorous acids 2a,b and 23 directly furnished, without addition of a catalyst, under phosphite/phosphate exchange the corresponding beta-configured sialyl riboside monophosphates 3a,b, 24a-d, 29, 46, and 47. The synthesis of the starting materials, formation of the products, and their treatment with sodium methanolate in methanol and subsequent hydrolysis of the sialic acid ester moiety to provide the unprotected target molecules 4a,b, 25a-d, 30, 48, and 49 is described. Investigations with alpha(2-6)-sialyl-transferase from rat Liver showed that base replacement in CMP-Neu5Ac (4a,b) is not tolerated by the enzyme but that modifications of the 5-, 8-, or g-position of the neuraminic acid residue (25a-d, 30, 48, 49) are tolerated.

  DOI：

  10.1002/(sici)1099-0690(200004)2000:8<1467::aid-ejoc1467>3.0.co;2-e
• 作为产物：
  描述：

  methyl 5-acetamido-2,4,7,8,9-penta-O-acetyl-3,5-dideoxy-D-glycero-D-galacto-2-nonulopyranosonate 在 2,4,6-三甲基吡啶 、 甲醇 、 乙酰溴 作用下， 以 二氯甲烷 、 氯仿 为溶剂， 反应 18.5h， 生成 methyl (benzyl 5-acetamido-4,7,8,9-tetra-O-acetyl-3,5-dideoxy-α-D-glycero-D-galacto-2-nonulopyranosid)onate
  参考文献：
  名称：

  合成Neu5Ac和4-epi-Neu5Ac的甲基和苄基糖苷的简单方法。Neu5Ac的苄基和甲基糖苷转化为N-三氟乙酰神经氨酸苄基糖苷

  摘要：

  摘要从Kuhn-Bashang合成Neu5Ac的反应产物中，得到5-乙酰氨基-3,5-二脱氧-α-和-β-d-甘油-d-talo -2-壬基吡喃磺酸（4- Epi -Neu5Ac）。分离为乙酰化甲酯（1和2）。用过量的甲醇处理（5-乙酰氨基-4,7,8,9-四-O-乙酰基-3,5-二脱氧-d-甘油-d-半乳糖-2-壬基吡喃糖基溴化）膦酸酯（5）得到高产率的甲基糖苷（13和14）的9：1α，β-混合物。同样，用苄醇5得到苄基糖苷（17和18）的63∶32的α，β-混合物。过量处理（5-乙酰氨基-4,7,8,9-四-O-乙酰基-3,5-二脱氧-β-d-甘油-pd-talo-2-壬基吡喃糖基溴化）膦酸酯（7）苯甲醇生成3：1的α，β-苄基糖苷（21和22）与甲基5-乙酰氨基-4,7,8的混合物，9-四-O-乙酰基-2,6-脱水-3,5-二脱氧-d-甘油-d-talo-非-2-烯酸酯（9）。在碳酸

  DOI：

  10.1016/s0008-6215(92)84240-s

文献信息

• Enhanced Sialylating Activity of O-Chloroacetylated 2-Thioethyl Sialosides
  作者：Yury E. Tsvetkov、Nikolay E. Nifantiev

  DOI：10.1055/s-2005-868514

  日期：——

  It has been shown that O-chloroacetyl protecting groups enhance significantly sialylating activity of 2-thioethyl sialosides in model reactions of α(2-8)-sialylation. Ethyl 4,7,8,9-tetra-O-chloroacetyl-3,5-dideoxy-2-thio-5-trifluoroacetamido-d-glycero-α-d-galacto-non-2-ulopyranoside that combines electron-withdrawing O-chloroacetyl and N-trifluoroacetyl protecting groups displayed the best reactivity and enabled the most efficient synthesis of the Neu5Acα(2-8)Neu5Ac dimer. The GD3 tetrasaccharide was synthesized in stepwise manner using this sialyl donor in the key (2-8)-coupling, albeit the yield was noticeably lower than in the model sialylation of monosaccharide acceptors.

  研究表明，O-氯乙酰保护基团显著提高了2-巯乙基唾液酸苷在α(2-8)-唾液酸化模型反应中的活性。乙基4,7,8,9-四-O-氯乙酰-3,5-二脱氧-2-硫-5-三氟乙酰胺基-d-甘油-α-d-半乳糖-壬-2-烯呋喃糖苷结合了吸电子的O-氯乙酰和N-三氟乙酰保护基团，展现出最佳的反应活性，并实现了Neu5Acα(2-8)Neu5Ac二聚体的最高效合成。通过使用这种唾液酸供体，以分步方式合成了GD3四糖，尽管其产率明显低于单糖受体的模型唾液酸化反应。
• Synthesis of N-Glycolyl-8-O-sulfoneuraminic Acid.
  作者：Makoto TANAKA、Toshitsugu KAI、Xue-Long SUN、Hiroaki TAKAYANAGI、Kimio FURUHATA

  DOI：10.1248/cpb.43.2095

  日期：——

  N-Glycolyl-8-O-sulfoneuraminic acid (1) was synthesized for the first time in good yield. The key intermediates for synthesis of 1, neuraminic acid O-benzyl α-glycoside (3) and neuraminic acid S-methyl α-glycoside (10) were prepared from readily available N-acetylneuraminic acid. The structures of these compounds were confirmed by analysis of their NMR spectra.

  首次合成了 N-乙酰基-8-O-砜基神经氨酸（1），收率良好。合成 1 的关键中间体神经氨酸 O-苄基 α-糖苷（3）和神经氨酸 S-甲基 α-糖苷（10）是用容易获得的 N-乙酰神经氨酸制备的。通过分析这些化合物的核磁共振光谱，确认了它们的结构。
• Lipid A and Related Compounds. XXVI. Syntheses of Biologically Active Penta-O-acetyl-N-glycoloylneuraminyl- and Penta-O-acetyl-3-deoxy-D-glycero-D-galcto-2-nonulopyranosonic Acid-(.ALPHA. 2.RAR.6)-D-glucosamine-4-phosphate Analogs of Lipid A.
  作者：Kiyoshi IKEDA、Kouki KAWAI、Kazuo ACHIWA

  DOI：10.1248/cpb.39.1305

  日期：——

  The syntheses of novel penta-O-acetyl-N-glycoloylneuraminyl- and penta-O-acetyl-3-deoxy-D-glycero-D-galacto-2-nonulopyranosonic acid-(alpha 2----6)-D-glucosamine-4-phosphate analogues of lipid A containing sialic acid in place of 3-deoxy-D-manno-2-octulosonic acid are described. Preliminary examination of the biological activity revealed that two synthetic disaccharides showed mitogenic activities

  新型五-O-乙酰基-N-糖酰基神经氨酸基和五-O-乙酰基-3-脱氧-D-甘油-D-半乳糖-2-壬基吡喃磺酸-（α2 ---- 6）-D-的合成描述了含有唾液酸代替3-脱氧-D-甘露糖-2-辛磺酸的脂质A的氨基葡萄糖-4-磷酸类似物。生物学活性的初步检查表明，两种合成的二糖显示有丝分裂活性和弱的抗肿瘤活性。
• Chemoenzymatic Synthesis of GAA-7 Glycan Analogues and Evaluation of Their Neuritogenic Activities
  作者：Hsin-Kai Tseng、Yung-Yu Su、Po-Jen Lai、Shao-Lun Lo、Hsien-Chein Liu、Sabbasani Rajasekhara Reddy、Linyi Chen、Chun-Cheng Lin

  DOI：10.1021/acschemneuro.3c00732

  日期：2024.2.7

  containing an uncommon sialic acid (8-O-methyl-N-glycolylneuraminic acid) and sialic acid-α-2,3-GalNAc linkage, makes it challenging to synthesize. We recently developed a streamlined method to chemoenzymatically synthesize GAA-7 glycan and employed this modular strategy to efficiently prepare a library of GAA-7 glycan analogues incorporating N-modified or 8-methoxyl sialic acids. Most of these synthetic

  在神经生长因子 (NGF) 存在下对神经元样大鼠肾上腺嗜铬细胞瘤 (PC12) 细胞进行测试时，神经节苷脂 GAA-7 表现出比神经节苷脂 GM1a 和大多数棘皮神经节苷脂 (EG) 更高的神经突生长。 GAA-7 聚糖的独特结构，含有罕见的唾液酸（8- O-甲基-N-乙醇酰神经氨酸）和唾液酸-α-2,3-GalNAc 连接，使其合成具有挑战性。我们最近开发了一种化学酶法合成 GAA-7 聚糖的简化方法，并采用这种模块化策略有效地制备了包含 N-修饰或 8-甲氧基唾液酸的 GAA-7 聚糖类似物文库。大多数这些合成聚糖在促进 PC12 细胞的神经元分化方面表现出中等功效。其中，含有普通唾液酸的类似物显示出比GAA-7聚糖本身更大的潜力。该结果表明甲氧基修饰对于神经突生长并不是必需的。因此，容易获得的类似物为进一步的生物学研究提供了一个有前途的模型。
• Accessibility of N-acyl-d-mannosamines to N-acetyl-d-neuraminic acid aldolase
  作者：Yanbin Pan、Tiffany Ayani、Janos Nadas、Shouming Wen、Zhongwu Guo

  DOI：10.1016/j.carres.2004.05.028

  日期：2004.8

  N-Acetyl-D-neuraminic acid (NeuNAc) aldolase is an important enzyme for the metabolic engineering of cell-surface NeuNAc using chemically modified D-mannosamines. To explore the optimal substrates for this application, eight N-acyl derivatives Of D-mannosamine were prepared, and their accessibility to NcuNAc aldolase was quantitatively investigated. The N-propionyl-, N-butanoyl-, N-iso-butanoyl-, N-pivaloyl-, and N-phenylacetyl-D-mannosamines proved to be as good substrates as, or even better than, the natural N-acetyl-D-mannosamine, while the N-trifluoropropionyl and benzoyl derivatives were poor. It was proposed that the electronic effects might have a significant influence on the enzymatic aldol condensation reaction Of D-mannosamine derivatives, with electron-deficient acyl groups having a negative impact. The results suggest that N-propionyl-, N-butanoyl-, N-isobutanoyl-, and N-phenylacetyl-D-mannosamines may be employed to bioengineer NeuNAc on cells. (C) 2004 Elsevier Ltd. All rights reserved.