methyl (3,4,6-tri-O-benzyl-2-deoxy-β-D-arabino-hexopyranosyl)-(1->6)-2,3,4-tri-O-benzyl-α-D-glucopyranoside

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: methyl (3,4,6-tri-O-benzyl-2-deoxy-β-D-arabino-hexopyranosyl)-(1->6)-2,3,4-tri-O-benzyl-α-D-glucopyranoside
• 英文别名: methyl (3,4,6-tri-O-benzyl-2-deoxy-β-D-glucopyranosyl)-(1→6)-2,3,4-tri-O-benzyl-α-D-glucopyranoside；methyl 2,3,4-tri-O-benzyl-6-O-(3,4,6-tri-O-benzyl-2-deoxy-β-D-arabino-hexopyranosyl)-α-D-glucopyranoside；methyl 2,3,4-tri-O-benzyl-6-O-(3,4,6-tri-O-benzyl-2-deoxy-D-glucopyranosyl)-α-D-glucopyranoside；methyl 2,3,4-tri-O-benzyl-6-O-(3,4,6-tri-O-benzyl-2-deoxy-β-D-glucopyranosyl)-α-D-glucopyranoside；Bn(-3)[Bn(-4)][Bn(-6)]2-deoxy-D-araHex(b1-6)[Bn(-2)][Bn(-3)][Bn(-4)]a-Glc1Me；(2R,3R,4S,5R,6S)-2-[[(2R,4R,5S,6R)-4,5-bis(phenylmethoxy)-6-(phenylmethoxymethyl)oxan-2-yl]oxymethyl]-6-methoxy-3,4,5-tris(phenylmethoxy)oxane
• 化学式: C₅₅H₆₀O₁₀
• 分子量: 881.075
• InChiKey: SPRFHHRASDESNT-XZRFZYPZSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  8.4
• 重原子数：
  65
• 可旋转键数：
  23
• 环数：
  8.0
• sp3杂化的碳原子比例：
  0.35
• 拓扑面积：
  92.3
• 氢给体数：
  0
• 氢受体数：
  10

反应信息

• 作为产物：
  描述：

  2-O-acetyl-3,4,6-tri-O-benzyl-D-glucopyranose 在 吡啶 、 咪唑 、 甲醇 、 偶氮二异丁腈 、 三氟甲磺酸三甲基硅酯 、 3 A molecular sieve 、 硫化氢 、 四丁基氟化铵 、 三正丁基氢锡 、 sodium methylate 、 1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下， 以 四氢呋喃 、 二氯甲烷 、 甲苯 为溶剂， 反应 5.0h， 生成 methyl (3,4,6-tri-O-benzyl-2-deoxy-β-D-arabino-hexopyranosyl)-(1->6)-2,3,4-tri-O-benzyl-α-D-glucopyranoside
  参考文献：
  名称：

  Convenient Synthesis of α- and β-2-Deoxyglycosides

  摘要：

  现成的 O-(2-O-硫代苯甲酰基-吡喃甘露糖基)三氯乙酰亚氨酸 4a 与葡萄糖苷 7 和 8 一起作为糖基接受体，只能得到δ-连接二糖 9 δ 和 10 δ。相应地，从 O-(2-O-硫代苯甲酰基-吡喃葡萄糖基)三氯乙酰亚氨酸 4b 中，只能得到δ-连接二糖 9 δ²和 10 δ²。用 Bu3SnH/AIBN 进行自由基引发的脱氧反应直接生成了 2-脱氧糖苷 11 δ,δ和 12 δ,δ。

  DOI：

  10.1055/s-1998-1689

文献信息

• An Air- and Water-Stable Iodonium Salt Promoter for Facile Thioglycoside Activation
  作者：An-Hsiang Adam Chu、Andrei Minciunescu、Vittorio Montanari、Krishna Kumar、Clay S. Bennett

  DOI：10.1021/ol5004059

  日期：2014.3.21

  iodonium salt phenyl(trifluoroethyl)iodonium triflimide is shown to activate thioglycosides for glycosylation at room temperature. Both armed and disarmed thioglycosides rapidly undergo glycosylation in 68–97% yield. The reaction conditions are mild and do not require strict exclusion of air and moisture. The operational simplicity of the method should allow experimentalists with a limited synthetic background

  空气和水稳定的碘鎓盐苯基（三氟乙基）碘鎓三氟甲磺酰亚胺在室温下可激活硫代糖苷以进行糖基化。武装和解除武装的硫糖苷都以 68-97% 的产率迅速进行糖基化。反应条件温和，不需要严格排除空气和水分。该方法的操作简单性应该允许具有有限合成背景的实验者构建糖苷键。
• TMSBr-mediated solvent- and work-up-free synthesis of α-2-deoxyglycosides from glycals
  作者：Mei-Yuan Hsu、Yi-Pei Liu、Sarah Lam、Su-Ching Lin、Cheng-Chung Wang

  DOI：10.3762/bjoc.12.164

  日期：——

  The thio-additions of glycals were efficiently promoted by a stoichiometric amount of trimethylsilyl bromide (TMSBr) to produce S-2-deoxyglycosides under solvent-free conditions in good to excellent yields. In addition, with triphenylphosphine oxide as an additive, the TMSBr-mediated direct glycosylations of glycals with a large range of alcohols were highly α-selective.

  甘露糖醛酸盐的硫加成反应可以在无溶剂条件下高效地通过等物量的溴化三甲基硅(TMSBr)催化产生良好至优异收率的S-2-脱氧糖苷。此外，加入三苯基膦氧化物作为添加剂，TMSBr介导的甘露糖醛酸盐与多种醇类的直接糖基化反应具有高度α-选择性。
• A 3,4-<i>trans</i>-Fused Cyclic Protecting Group Facilitates α-Selective Catalytic Synthesis of 2-Deoxyglycosides
  作者：Edward I. Balmond、David Benito-Alifonso、Diane M. Coe、Roger W. Alder、Eoghan M. McGarrigle、M. Carmen Galan

  DOI：10.1002/anie.201403543

  日期：2014.7.28

  disaccharides or glycoconjugates with high α‐selectivity and yields (77–97 %) using a trans‐fused cyclic 3,4‐O‐disiloxane protecting group and TsOH⋅H2O (1 mol %) as a catalyst. Control of the anomeric selectivity arises from conformational locking of the intermediate oxacarbenium cation. Glucals outperform rhamnals because the C6 side‐chain conformation augments the selectivity.

  已经开发出一种实用的方法，使用反式稠合环状 3,4-O-二硅氧烷保护基团和 TsOH⋅H 2 O ，将葡糖和鼠李糖转化为具有高α-选择性和产率（77-97%）的二糖或糖缀合物（ 1 mol%) 作为催化剂。异头选择性的控制来自中间氧杂碳鎓阳离子的构象锁定。Glucals 优于鼠李糖醇，因为 C6 侧链构象增强了选择性。
• Glycosylation Reactions Using Phenyl(trifluoroethyl)iodonium Salts
  申请人：Trustees of Tufts College

  公开号：US20150099870A1

  公开（公告）日：2015-04-09

  Provided are methods for the preparation of glycosylation products, including those represented by formula I: Sugar-O—R′  I comprising the step of combining R′—OH, a glycosyl sulfide glycosyl donor (“thioglycoside donor”), a hypervalent iodine alkyl-transfer activating reagent, and a base. In an embodiment, the hypervalent iodine alkyl-transfer activating reagent is (phenyl(trifluoroethyl)iodonium triflimide).

  提供了制备糖基化产物的方法，包括由式I表示的那些： 糖-O—R′  I 包括将R′—OH、糖基硫醚糖基供体（“硫代糖苷供体”）、高价碘烷基转移活化试剂和碱结合的步骤。在一种实施例中，高价碘烷基转移活化试剂为（苯基(三氟乙基)碘三氟甲磺酰胺）。
• A Stereocontrolled Construction of 2-Deoxy-β-glycosidic Linkages<i>via</i>1,2-<i>trans</i>-β-Glycosidation of 2-Deoxy-2-[(<i>p</i>-methoxyphenyl)thio] glycopyranosyl<i>N</i>,<i>N</i>,<i>N</i>′,<i>N</i>′-Tetramethylphosphoroamidates
  作者：Shun-ichi Hashimoto、Yuki Yanagiya、Takeshi Honda、Shiro Ikegami

  DOI：10.1246/cl.1992.1511

  日期：1992.8

  A stereocontrolled synthesis of 2-deoxy-β-glycosides has been achieved by developing a salient 1,2-trans-glycosidation method with 2-deoxy-2-[(p-methoxyphenyl)thio]glycopyranosyl N,N,N′,N′-tetramethylphosphoroamidates as glycosyl donors followed by a reductive removal of the p-methoxyphenylthio group with Raney nickel. The p-methoxyphenylthio group equatorially disposed at C-2 has proven to be an excellent stereodirecting auxiliary.

  通过开发一种显著的1,2-反式糖基化方法，使用2-脱氧-2-[(对甲氧基苯基)硫]吡喃糖基N,N,N',N'-四甲基膦酰胺作为糖基供体，随后用Raney镍还原去除对甲氧基苯硫基团，实现了2-脱氧-β-糖苷的立体控制合成。位于C-2位的对甲氧基苯硫基团在赤道位置上被证明是一个极佳的立体导向辅助基团。