2-azido-3,4,6-tri-O-benzyl-2-deoxy-D-galactopyranose | 79781-69-4

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 2-azido-3,4,6-tri-O-benzyl-2-deoxy-D-galactopyranose
• 英文别名: (3R,4R,5R,6R)-3-azido-4,5-bis(benzyloxy)-6-((benzyloxy)methyl)tetrahydro-2H-pyran-2-ol；(3R,4R,5R,6R)-3-azido-4,5-bis(phenylmethoxy)-6-(phenylmethoxymethyl)oxan-2-ol
• CAS: 79781-69-4
• 化学式: C₂₇H₂₉N₃O₅
• 分子量: 475.544
• InChiKey: HWPBAVIEENPTJY-MZIUKZFCSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.5
• 重原子数：
  35
• 可旋转键数：
  11
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.33
• 拓扑面积：
  71.5
• 氢给体数：
  1
• 氢受体数：
  7

反应信息

• 作为反应物：
  描述：

  2-azido-3,4,6-tri-O-benzyl-2-deoxy-D-galactopyranose 在 palladium on activated charcoal 四氮唑 、 氢气 作用下， 以 甲醇 、 二氯甲烷 、 水 、 乙酸乙酯 为溶剂， 20.0 ℃ 、5.0 MPa 条件下， 反应 66.0h， 生成 α-D-galactosamine 1-phosphate
  参考文献：
  名称：

  Syntheses of unnatural N-substituted UDP-galactosamines as alternative substrates for N-acetylgalactosaminyl transferases

  摘要：

  UDP-GalNAc analogues with slight modifications in the 2-acetamido group of the GalNAc moiety are prepared in order to study their role in the mechanism of the N-acetylgalactosaminyl transferase mediated glycosylation step. The analogues with N-propionyl, N-butyryl- and N-bromoacetyl-groups were synthesized, utilizing Khorana's morpholidate coupling method starting from D-galactosaminyl-l-phosphate after selective N-acylation of its amino group with the appropriate N-acyloxysuccinimides. Furthermore. in addition to UDP-galactosamine its 2-azido analogue has been efficiently prepared involving a metal catalyzed diazo transfer reaction. (C) 2002 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0008-6215(02)00183-0
• 作为产物：
  描述：

  3,4,6-tri-O-acetyl-2-azido-2-deoxy-alpha-D-galactopyranosyl bromide 在 氢氧化钾 、 N-碘代丁二酰亚胺 、 sodium hydride 作用下， 以 乙醇 、 氯仿 、 水 、 N,N-二甲基甲酰胺 、 乙腈 为溶剂， 反应 16.08h， 生成 2-azido-3,4,6-tri-O-benzyl-2-deoxy-D-galactopyranose
  参考文献：
  名称：

  Synthesis of some amino and carboxy analogs of galabiose; evaluation as inhibitors of the pilus protein PapGJ96 from Escherichia coli

  摘要：

  The 2'-amino-2'-deoxy, 6-amino-6-deoxy, and 6-carboxy analogs of the reference inhibitor 2-(trimethylsilyl)ethyl (alpha-D-galactopyranosyl)-(1-->4)-beta-D-galactopyranoside were synthesized and evaluated as inhibitors of the binding of the Escherichia coli-derived pilus protein PapG(J96), using an ELISA assay. The inhibitory efficiencies (K-rel; relative to the reference inhibitor) were: 157, 13, and < 8, respectively. The results support the previously proposed combining site model, where the protein carries a negatively charged amino acid residue near HO-2' and HO-6 of the galabioside. (C) 1998 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0008-6215(98)00020-2

文献信息

• Stereoselective Synthesis of 1,1′‐Disaccharides by Organoboron Catalysis
  作者：Sanae Izumi、Yusuke Kobayashi、Yoshiji Takemoto

  DOI：10.1002/anie.202004476

  日期：2020.8.10

  2‐dihydroxyglycosyl acceptors and glycosyl donors in the presence of a tricyclic borinic acid catalyst. In this reaction, the complexation of the diols and the catalyst is crucial for the activation of glycosyl donors, as well as for the 1,2‐cis‐configuration of the products. The anomeric stereochemistry of the glycosyl donor depends on the employed glycosyl donor. Applications of the produced 1,1′‐disaccharides are

  在三环硼酸催化剂存在下，通过使用1,2-二羟基糖基受体和糖基供体可以实现1,1'-二糖的高度立体选择性合成。在该反应中，二醇和催化剂的络合对于糖基供体的活化以及产物的1,2-顺式构型至关重要。糖基供体的异头立体化学取决于所用的糖基供体。还描述了产生的1,1'-二糖的应用。
• Conversion of glycals into vicinal-1,2-diazides and 1,2-(or 2,1)-azidoacetates using hypervalent iodine reagents and Me₃SiN₃. Application in the synthesis of N-glycopeptides, pseudo-trisaccharides and an iminosugar
  作者：Ande Chennaiah、Srijita Bhowmick、Yashwant D. Vankar

  DOI：10.1039/c7ra08637g

  日期：——

  Glycals were found to react with a reagent system comprising of phenyliodine bis(trifluoroacetate) (PIFA) and Me3SiN3 in the presence of TMSOTf as a catalyst to form the corresponding vicinal 1,2-diazides. On the other hand, they reacted with another reagent system phenyliodine diacetate (PIDA) and Me3SiN3, also in the presence of TMSOTf as a catalyst, to lead to the corresponding vicinal 1,2-azidoacetates

  发现乙二醇在TMSOTf作为催化剂存在下与包含苯基碘双（三氟乙酸盐）（PIFA）和Me 3 SiN 3的试剂系统反应形成相应的邻位1,2-二叠氮化物。另一方面，它们也在TMSOTf作为催化剂的情况下与另一种试剂体系苯乙酸二乙酸苯酯（PIDA）和Me 3 SiN 3反应，生成相应的邻位1,2-叠氮基乙酸酯。这些叠氮基衍生物被转化为许多2-叠氮基-N-糖肽，伪三糖和哌啶三醇衍生物亚氨基糖。
• Total Synthesis of the Congested, Bisphosphorylated <i>Morganella morganii</i> Zwitterionic Trisaccharide Repeating Unit
  作者：D. Jamin Keith、Steven D. Townsend

  DOI：10.1021/jacs.9b06830

  日期：2019.8.14

  Zwitterionic polysaccharides (ZPS) activate T-cell-dependent immune responses by major histocompatibility complex class II presentation. Herein, we report the first synthesis of a Morganella morganii ZPS repeating unit as an enabling tool in the synthesis of novel ZPS materials. The repeating unit incorporates a 1,2-cis--glycosidic bond; the problematic 1,2-trans-galactosidic bond, Gal-β(1→3)-GalNAc;

  两性离子多糖 (ZPS) 通过主要组织相容性复合体 II 类呈递激活 T 细胞依赖性免疫反应。在此，我们报告了摩根氏菌 ZPS 重复单元的首次合成，作为合成新型 ZPS 材料的有利工具。重复单元包含一个 1,2-顺式-α-糖苷键；有问题的 1,2-反式半乳糖苷键，Gal-β(1→3)-GalNAc；和磷酸甘油和磷酸胆碱残基，它们以前没有被观察到作为同一寡糖上的官能团。成功的第三代方法利用了磷酸甘油功能化受体的一流糖基化。为了安装磷酸胆碱单元，合成了一种高效的磷酸胆碱供体。
• An Efficient Glycosylation Reaction of 1-Hydroxy Sugars with Various Nucleophiles Using A Catalytic Amount of Activator and Hexamethyldisiloxane
  作者：Teruaki Mukaiyama、Koki Matsubara、Miyuki Hora

  DOI：10.1055/s-1994-25695

  日期：——

  In the presence of hexamethyldisiloxane and anhydrous calcium sulfate, a catalytic amount of activator such as tin(II) trifluoromethanesulfonate, ytterbium trifluoromethanesulfonate , lanthanum trifluoromethanesulfonate or tin(II) chloride smoothly promotes the glycosylation reactions between 1-hydroxy sugars and free alcohols, electron-rich aromatic compounds or silylated nucleophiles to produce various O -, C - or N - glycosides stereoselectively in high yields. In the case of oxygen or nitrogen nucleophiles, β-ribosides are formed, except that α-ribosides are obtained predominantly in the presence of lithium perchlorate. In the case of carbon nucleophiles such as electron-rich aromatic compounds or silyl enol ethers derived from carbonyl compounds, perfect β-selectivity is shown either in the the presence or absence of lithium perchlorate. Further, pyranosyl substrates such as glucose or galactose afford the corresponding α-anomers, except with electron-rich aromatic compounds.

  在六甲基二硅氧烷和无水硫酸钙的存在下，以催化量的活化剂（如二氟三氟甲磺酸锡、三氟三氟甲磺酸镱、三氟三氟甲磺酸镧或二氯化锡）顺利促进1-羟基糖与自由醇、富电子芳香化合物或硅化亲核试剂之间的糖基化反应，高产率地选择性合成各种O-、C-或N-糖苷。对于氧或氮亲核试剂，主要生成β-核糖苷，但在高氯酸锂存在下主要得到α-核糖苷。对于碳亲核试剂（如富电子芳香化合物或来自羰基化合物的硅基烯醇醚），无论在高氯酸锂存在或不存在下，均表现出完全的β-选择性。此外，吡喃糖基底物（如葡萄糖或半乳糖）主要生成相应的α-异构体，但对于富电子芳香化合物则例外。
• Electrophilic azidation of 2-deoxy-aldono-1,5-lactones: an alternative route to 2-azido-2-deoxy-aldopyranoses
  作者：Fran�ois-Yves Dupradeau、Sen-itiroh Hakomori、Tatsushi Toyokuni

  DOI：10.1039/c39950000221

  日期：——

  Electrophilic azidation of tri-O-benzyl-2-deoxy-D-galactono-1,5-lactone 3 with triisopropylphenylsulfonyl azide, followed by selective reduction with diisobutylaluminium hydride, yielded tri-O-benzyl-2-azido-2-deoxy-D-galactopyranose 5 as the sole product in 80% yield, while the same sequence of reactions with the 2-deoxy-glucono-1,5-lactone derivative 8 afforded only tri-O-benzyl-2-azido-2-deoxy-D-mannopyranose 10 in 65% yield.

  三-O-苄基-2-脱氧-D-半乳糖醛-1,5-内酯3与三异丙基苯磺酰叠氮化物的电亲核叠氮化反应，随后使用二异丁基铝氢化物进行选择性还原，得到了三-O-苄基-2-叠氮-2-脱氧-D-半乳糖吡喃糖5，产率为80%，而对2-脱氧-D-葡萄糖醛-1,5-内酯衍生物8进行相同的反应顺序仅得到三-O-苄基-2-叠氮-2-脱氧-D-甘露糖吡喃糖10，产率为65%。