ethyl 2,6-di-O-benzoyl-1-thio-β-D-galactopyranoside | 194858-02-1

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: ethyl 2,6-di-O-benzoyl-1-thio-β-D-galactopyranoside
• 英文别名: 2,6-di-O-benzoyl-1-thio-β-D-galactopyranoside；[(2R,3R,4S,5R,6S)-5-benzoyloxy-6-ethylsulfanyl-3,4-dihydroxyoxan-2-yl]methyl benzoate
• CAS: 194858-02-1
• 化学式: C₂₂H₂₄O₇S
• 分子量: 432.494
• InChiKey: BTHPKSOPYUOXRK-IHZGOTPNSA-N

物化性质

• 沸点：
  608.8±55.0 °C(Predicted)
• 密度：
  1.35±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3
• 重原子数：
  30
• 可旋转键数：
  9
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.36
• 拓扑面积：
  128
• 氢给体数：
  2
• 氢受体数：
  8

反应信息

• 作为反应物：
  描述：

  ethyl 2,6-di-O-benzoyl-1-thio-β-D-galactopyranoside 在 2,4,6-三甲基吡啶 、 4 A molecular sieve 、 silver trifluoromethanesulfonate 、 二正丁基氧化锡 、 DMTST 作用下， 以 甲醇 、 二氯甲烷 为溶剂， 反应 21.5h， 生成 hexadecyl (3,4,6-tri-O-acetyl-2-azido-2-deoxy-α-D-glucopyranosyl)-(1-4)-2,3,6-tri-O-benzoyl-D-galactopyranoside
  参考文献：
  名称：

  Synthesis of Oligosaccharides Designed to form Micelles, Corresponding to Structures Found in Ovarian Cyst Fluid

  摘要：

  The syntheses of alpha-D-GlcpNAc-(1-->4)-beta-D-Galp-(1-->4)-beta-D-GlcNAc-(1-->O)-(CH2)(15)CH3 (1) and fragments thereof, corresponding to structures found in human ovarian cyst fluid, are described. Silver triflate promoted coupling of 3.4,6-tri-O-acetyl-2-azido-2-deoxy-beta-D-glucopyranosyl bromide (12) and galactose acceptor (11) gave a disaccharide donor (13), which was readily transformed into the corresponding bromo-derivative 18. For the synthesis of disaccharide beta-D-Galp-(1-->4)-D-GlcNAc, several differently protected glucosamine accepters were prepared. It was found that cetyl alcohol needed to be introduced after the formation of the P-galactoside bond. Glycosylation of pent-4-enyl 3,6-di-O-benzyl-2-deoxy-2-tetrachlorophthalimido-beta-D-glucopyranoside (30) with (3,4,6-tri-O-acetyl-2-azido-2-deoxy-alpha-D-glucopyranosyl)-(1-->4)-2,3,6-tri-O-benzoyl-alpha-D-galactopyranosyl bromide (18) by use of silver triflate as promoter gave the desired trisaccharide 31. Finally 31 was transformed via coupling to the long alkyl chain aglycon and deprotection into the title compound 1.

  DOI：

  10.1080/07328300008544063
• 作为产物：
  描述：

  1-硫代-Β-D-乙基半乳糖苷 在 对甲苯磺酸 、 三氟乙酸 作用下， 反应 5.25h， 生成 ethyl 2,6-di-O-benzoyl-1-thio-β-D-galactopyranoside
  参考文献：
  名称：

  Synthesis of Oligosaccharides Designed to form Micelles, Corresponding to Structures Found in Ovarian Cyst Fluid

  摘要：

  The syntheses of alpha-D-GlcpNAc-(1-->4)-beta-D-Galp-(1-->4)-beta-D-GlcNAc-(1-->O)-(CH2)(15)CH3 (1) and fragments thereof, corresponding to structures found in human ovarian cyst fluid, are described. Silver triflate promoted coupling of 3.4,6-tri-O-acetyl-2-azido-2-deoxy-beta-D-glucopyranosyl bromide (12) and galactose acceptor (11) gave a disaccharide donor (13), which was readily transformed into the corresponding bromo-derivative 18. For the synthesis of disaccharide beta-D-Galp-(1-->4)-D-GlcNAc, several differently protected glucosamine accepters were prepared. It was found that cetyl alcohol needed to be introduced after the formation of the P-galactoside bond. Glycosylation of pent-4-enyl 3,6-di-O-benzyl-2-deoxy-2-tetrachlorophthalimido-beta-D-glucopyranoside (30) with (3,4,6-tri-O-acetyl-2-azido-2-deoxy-alpha-D-glucopyranosyl)-(1-->4)-2,3,6-tri-O-benzoyl-alpha-D-galactopyranosyl bromide (18) by use of silver triflate as promoter gave the desired trisaccharide 31. Finally 31 was transformed via coupling to the long alkyl chain aglycon and deprotection into the title compound 1.

  DOI：

  10.1080/07328300008544063

文献信息

• Synthesis of a hexasaccharide corresponding to a porcine zona pellucida fragment that inhibits porcine sperm-oocyte interaction in vitro
  作者：Nynke M. Spijker、Cor A. Keuning、Mariska Hooglugt、Gerrit H. Veeneman、Constant A.A. van Boeckel

  DOI：10.1016/0040-4020(96)00225-6

  日期：1996.4

  The synthesis of hexasaccharide1, [Galβ(1-4)GlcNAc[6OSO3]β(1-3)Galβ(1-4)GlcNAcβ(1-3)Galβ(1-3)GalNAcα-O(CH2)3NH2], which corresponds to a porcine zona pellucida fragment that inhibits porcine sperm-oocyte interaction, is described. Compound1 was obtained from fully protected hexasaccharide2, which was in turn constructed from protected Galβ(1-3)GalNAc disaccharide5, containing an α-linked 3-azidopropyl

  六糖1，[Galβ（1-4）GlcNAc [6OSO 3 ]β（1-3）Galβ（1-4）GlcNAcβ（1-3）Galβ（1-3）GalNAcα-O（CH 2）3的合成描述了NH 2 ]，其对应于抑制猪精子-卵母细胞相互作用的猪透明带片段。化合物1是从完全保护的六糖2中获得的，而六糖2依次由保护的Galβ（1-3）GalNAc二糖5（包含一个与α连接的3-叠氮丙基间隔基）以及乳糖胺衍生物3和4构成。通过将硒代苯基糖苷偶联制备二糖3和46具有含有异头硫代乙基的糖基受体。NIS / TfOH促进了二糖4与5的偶联，得到29，通过选择性除去乙酰丙酰基将其转化为四糖受体30。用3的30进行糖基化，得到保护的六糖2。去除邻苯二甲酰亚胺基，乙酰化，然后选择性去除烯丙基和硫酸化，最后完全脱保护，得到六糖1。
• Polymer-Supported Synthesis of a Branched Trisaccharide of the Type IA Group B Streptococcus Capsular Polysaccharide: 3-Iodo-4-methoxybenzyl as a New O-Protecting Group
  作者：Seema Mehta、Dennis M. Whitfield

  DOI：10.1016/s0040-4020(00)00612-8

  日期：2000.8

  independently synthesized and used to introduce this new protecting group. The levulinoyl and the IPMB protecting groups have been used in an orthogonal manner to create 3,4-branching on a galactopyranosyl residue. Due to the enhanced acid stability of the IPMB group over the PMB group, the former group was critical to the success of the synthesis. The final trisaccharide and its intermediates were cleaved

  描述了IA型B族链球菌荚膜多糖的关键分支三糖（1）的合成。使用了聚乙二醇（MeO–（CH 2 CH 2 O）n –H，MPEG）和二氧二甲苯[ p-（O）CH 2 –C 6 H 4 –CH 2（O）–，DOX]的单甲醚作为聚合物-载体/接头的组合。尝试在涉及N的糖基化条件下使用对甲氧基苄基（PMB）保护基-碘代琥珀酰亚胺/三氟甲磺酸银的促进作用导致碘化反应，形成了3-碘-4-甲氧基苄基（IPMB）衍生物。随后，独立地合成了IPMB氯化物，并用于引入该新的保护基。乙酰丙酰基和IPMB保护基已经以正交方式用于在半乳糖吡喃糖基残基上产生3，4-支链。由于IPMB组的酸稳定性高于PMB组，因此前一组对于合成成功至关重要。通过三氟甲磺酸scan（III）和乙酸酐从MPEG聚合物载体上裂解最终的三糖及其中间体。
• 1-Methyl 1′-cyclopropylmethyl: an acid labile O-protecting group for polymer-supported oligosaccharide synthesis
  作者：Eva Eichler、Fengyang Yan、Jennifer Sealy、Dennis M Whitfield

  DOI：10.1016/s0040-4020(01)00582-8

  日期：2001.7

  6-tri-O-benzoyl-3-O-(R,S-1-methyl 1′-cyclopropylmethyl)-1-thio-β-d-galactopyranoside. Through a similar sequence of glycosylation of (MPEG)(DOX)OH, MCPM deprotection, glycosylation, functional group manipulation and cleavage the peracylated disaccharide GlcNAc(β1→3)Gal(β1→)DOXOAc was prepared. Finally, the donor 2,6-di-O-benzoyl-4-O-levulinoyl-3-O-(R,S-1-methyl 1′-cyclopropylmethyl)-1-thio-β-d-galactopyranoside

  R，S -1-甲基1'-环丙基甲醇可被转化为其三氯乙酰亚胺酸酯衍生物。然后可将路易斯酸催化的醚化反应用于制备甲基环丙基甲基（MCPM）醚。因此，制备了乙基2,3,4-三-O-苄基-6- O-（R，S -1-甲基1'-环丙基甲基）-1-硫代-α/β-d-吡喃葡萄糖苷，并形成了连接基聚合物组合（MPEG）（DOX）OH糖基化。将MCPM基团用CH 2 Cl 2中的10％三氟乙酸裂解，并将得到的醇糖基化。在保护基团操纵并裂解后，分离出过乙酰化的二糖GlcNAc（β1→6）GlcOAc。同样是4,6- O将乙基1-硫代-β-d-吡喃半乳糖苷的-苯基硼酸酯二酯在O-3区域选择性醚化，并在硼酸酯裂解后将糖苯甲酰化，得到2,4,6-三-O-苯甲酰基-3 - O-（R，S -1-甲基1'-环丙基甲基）-1-硫代-β-d-吡喃半乳糖苷。通过相似的（MPEG）（DOX）OH糖基化序列，制备了MCPM脱保护，糖
• Novel Regioselective Glycosylations for the Convergent and Chemoselective Assembly of Oligosaccharides
  作者：Geert-Jan Boons、Tong Zhu

  DOI：10.1055/s-1997-5767

  日期：1997.7

  A novel convergent chemoselective glycosylation methodology based on differences in reactivity between hydroxyl groups of a glycosyl donor and an acceptor was established. A series of di- and trisaccharides were synthesized in good to excellent yields which can be employed as acceptors in a subsequent glycosylation without the need to perform protecting group interconversions. The effectiveness of this methodology has been demonstrated in a highly convergent one-pot multi-step glycosylation yielding 1-4 and 1-6 linked tetra- and hexasaccharide.

  根据糖基供体和受体羟基之间反应性的差异，建立了一种新的聚合化学选择糖基化方法。该方法合成了一系列二糖和三糖，产量从良好到极佳，在随后的糖基化过程中可用作受体，而无需进行保护基相互转化。这种方法的有效性已在高度收敛的单锅多步糖基化过程中得到证实，并产生了 1-4 和 1-6 连接的四糖和六糖。
• Simplifying Oligosaccharide Synthesis:  Efficient Synthesis of Lactosamine and Siaylated Lactosamine Oligosaccharide Donors
  作者：Fengyang Yan、Seema Mehta、Eva Eichler、Warren W. Wakarchuk、Michel Gilbert、Melissa J. Schur、Dennis M. Whitfield

  DOI：10.1021/jo026569v

  日期：2003.3.1

  A practical sequence is described for converting D-glucosamine into peracetylated Gal(beta-1,4)-GlcNTroc(beta1-S)Ph and Neu5Ac(alpha-2,3)Gal(beta-1,4)GlcNTroc(beta1-S)Ph building blocks using a synthetic strategy based on chemoenzymatic oligosaccharide synthesis. The known trichloroethoxycarbonyl, N-Troc, protecting group was selected as a suitable protecting group for both enzymatic and chemical reaction conditions. These oligosaccharide building blocks proved effective donors for the,beta-selective glycosylation of the unreactive OH-3 of a polymeric PEG-bound acceptor and for the axial OH-2 of a mannose acceptor in good yields. The resulting complex oligosaccharides are useful for vaccine and pharmaceutical applications.