ethyl 1-thio-6-O-tert-butyldiphenylsilyl-α-D-mannopyranoside | 316188-11-1

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: ethyl 1-thio-6-O-tert-butyldiphenylsilyl-α-D-mannopyranoside
• 英文别名: ethyl 6-O-[(tert-butyl)diphenylsilyl]-1-thio-α-D-mannopyranoside
• CAS: 316188-11-1
• 化学式: C₂₄H₃₄O₅SSi
• 分子量: 462.682
• InChiKey: UEUCUEWVZYTVGJ-MHMIHQHRSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.12
• 重原子数：
  31.0
• 可旋转键数：
  7.0
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  79.15
• 氢给体数：
  3.0
• 氢受体数：
  6.0

反应信息

• 作为反应物：
  描述：

  ethyl 1-thio-6-O-tert-butyldiphenylsilyl-α-D-mannopyranoside 在 盐酸 、 4-二甲氨基吡啶 、 sodium hydroxide 、 3 Angstroem MS 、 四丁基氟化铵 、 四丁基硫酸氢铵 、 sodium hydride 、 sodium cyanoborohydride 、 1-羟基苯并三唑 、 对甲苯磺酸 、 溶剂黄146 、 N,N'-二环己基碳二亚胺 、 三氟乙酸 作用下， 以 四氢呋喃 、 乙醚 、 二氯甲烷 、 水 、 N,N-二甲基甲酰胺 为溶剂， 反应 128.0h， 生成 benzyl 2-O-benzoyl-6-O-benzyl-3-O-[3-(ethyl 2,4,6-tri-O-benzyl-1-thio-α-D-mannopyranosid-3-O-yl)-1,3-dioxopropyl]-α-D-glucopyranoside
  参考文献：
  名称：

  摘要：

  A series of prearranged glycosides 5, 17, 23, 28, 37 and 41, having a benzyl-protected 1-thiomannosyl donor linked through its positions 2, 3, 4 and 6 via succinate and malonate tethers, respectively, to positions 2, 3, and 6 of a benzyl glucopyranoside acceptor, were prepared by condensation of the respective mannosyl succinates and malonates with suitably protected benzyl glucopyranosides. The prearranged glycosides were intramolecularly coupled under various conditions to give the corresponding, tethered (1 --> 4)-linked disaccharides The yields and anomer ratios of the products of these couplings were interpreted in terms of the thermodynamic stability of the resulting disaccharides. In the case of prearranged glycoside 17, having positions 3 of both the donor and the acceptor linked by a succinate tether, a strong dependence of the diastereoselectivity of the intramolecular glycosylation on the activation procedure was observed. All other cases did not show a significant dependence of the outcome of the anomeric configuration in intramolecular glycosylation on the activation procedure or the solvent.

  DOI：

  10.1002/1522-2675(20001004)83:10<2655::aid-hlca2655>3.0.co;2-u
• 作为产物：
  描述：

  S-ethyl 2,3,4,6-tetra-O-acetyl-1-deoxy-1-thio-α-D-mannopyranoside 在 咪唑 、 甲醇 、 sodium methylate 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 生成 ethyl 1-thio-6-O-tert-butyldiphenylsilyl-α-D-mannopyranoside
  参考文献：
  名称：

  Studies on the substrate specificity of a GDP-mannose pyrophosphorylase from Salmonella enterica

  摘要：

  一系列甲氧基和去氧衍生物的甘霖糖吡喷酸酯（Manp-1P）经化学合成，研究了它们通过一种来自沙门氏菌（Salmonella enterica）的焦磷酸化酶（GDP-ManPP）能否转化为相应的鸟苷二磷酸甘霖糖（GDP-Manp）类似物的能力。对甲氧基类似物的评价表明，GDP-ManPP对C-2、C-3和C-4位置的庞大取代基不耐受，进而暗示这些位置被埋藏在酶活性位点内部。此外，6-甲氧基和6-去氧 Manp-1P 衍生物均是GDP-ManPP的良好或中等底物，因此表明 Manp-1P 底物的C-6 羟基不是与酶结合所必需的。综合考虑先前发表的其他研究成果，这种酶似乎具有潜在的用途，可用于化酶合成 GDP-Manp 类似物，这些类似物是用于研究以这种糖核苷酸为底物的酶的有用探针。

  DOI：

  10.3762/bjoc.8.136

文献信息

• Dispiroketals in synthesis (Part 5): A new opportunity for oligosaccharide synthesis using differentially activated glycosyl donors and acceptors
  作者：Geert-Jan Boons、Peter Grice、Ray Leslie、Steven V Ley、Lam Lung Yeung

  DOI：10.1016/s0040-4039(00)61375-8

  日期：1993.1

  The reactivity of dispiroketal protected thioglycosides makes them useful new precursors for oligossaccharide synthesis as is illustrated by the preparation of a protected pentasaccharide unit common to the variant surface glycoprotein of Trypanosoma brucei.

  双螺酮保护的硫糖苷的反应活性使其成为寡糖合成的有用的新前体，如制备布鲁氏锥虫变体表面糖蛋白共有的受保护的五糖单元所示。
• Baeschlin, Daniel K.; Chaperon, Andre R.; Green, Luke G., Chemistry - A European Journal, 2000, vol. 6, # 1, p. 172 - 186
  作者：Baeschlin, Daniel K.、Chaperon, Andre R.、Green, Luke G.、Hahn, Michael G.、Ince, Stuart J.、Ley, Steven V.

  DOI：——

  日期：——
• An efficient and recyclable catalyst for the cleavage of tert-butyldiphenylsilyl ethers
  作者：Shiqiang Yan、Ning Ding、Wei Zhang、Peng Wang、Yingxia Li、Ming Li

  DOI：10.1016/j.carres.2012.02.021

  日期：2012.6

  An efficient, chemoselective, and environment-friendly method for the deprotection of tert-butyldiphenylsilyl ethers mediated by triflic acid supported on silica gel is reported. A wide range of tert-butyldiphenylsilyl ethers derived from carbohydrate and saponin residues can be smoothly cleaved in the presence of various types of other protecting groups in good to excellent yields in acetonitrile. This heterogeneous reaction does not require aqueous workup, and the supported catalyst can be readily recycled. (C) 2012 Elsevier Ltd. All rights reserved.