2,3,4,6-tetra-O-benzyl-β-D-galactopyranosyl-(1->4)-2,3,6-tri-O-benzyl-β-D-glucopyranose | 115988-74-4

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 2,3,4,6-tetra-O-benzyl-β-D-galactopyranosyl-(1->4)-2,3,6-tri-O-benzyl-β-D-glucopyranose
• 英文别名: 2,3,6-tri-O-benzyl-4-O-(2,3,4,6-tetra-O-benzyl-β-D-galactopyranosyl)-β-D-glucopyranose；2,3,6-tri-O-benzyl-4-O-(2′,3′,4′,6′-tetra-O-benzyl-β-D-galactopyranosyl)-D-glucopyranose；2,3,6-tri-O-benzyl-4-(2′,3′,4′,6′-tetra-O-benzyl-β-D-galactopyranosyl)-β-D-glucopyranose；Bn(-2)[Bn(-3)][Bn(-4)][Bn(-6)]Gal(b1-4)[Bn(-2)][Bn(-3)][Bn(-6)]b-Glc；(2R,3R,4S,5R,6R)-3,4-bis(phenylmethoxy)-6-(phenylmethoxymethyl)-5-[(2S,3R,4S,5S,6R)-3,4,5-tris(phenylmethoxy)-6-(phenylmethoxymethyl)oxan-2-yl]oxyoxan-2-ol
• CAS: 115988-74-4
• 化学式: C₆₁H₆₄O₁₁
• 分子量: 973.173
• InChiKey: XOACCKXXDCYYAW-IMBADGMBSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  8.9
• 重原子数：
  72
• 可旋转键数：
  25
• 环数：
  9.0
• sp3杂化的碳原子比例：
  0.31
• 拓扑面积：
  113
• 氢给体数：
  1
• 氢受体数：
  11

反应信息

• 作为产物：
  描述：

  2-(trimethylsilyl)ethyl 2,3,6-tri-O-benzyl-4-O-(2,3,4,6-tetra-O-benzyl-β-D-galactopyranosyl)-β-D-glucopyranoside 在 三氟乙酸 作用下， 以 二氯甲烷 为溶剂， 反应 0.5h， 以90%的产率得到2,3,4,6-tetra-O-benzyl-β-D-galactopyranosyl-(1->4)-2,3,6-tri-O-benzyl-β-D-glucopyranose
  参考文献：
  名称：

  2-trimethylsilylethyl glycosides. Anomeric deblocking of mono- and disaccharides.

  摘要：

  DOI：

  10.1016/s0040-4039(00)80096-9

文献信息

• Preparation of partially benzylated mono-, di-, and trisaccharides by selective cleavage of the β-fructofuranosidic linkage in fully benzylated sucrose and sucrose-related oligosaccharides under acidic conditions
  作者：Takashi Yamanoi、Noriko Misawa、Sho Matsuda、Mikio Watanabe

  DOI：10.1016/j.carres.2008.03.024

  日期：2008.6

  Several partially benzylated mono-, di-, and trisaccharides having an anomeric hydroxyl group were successfully prepared by selective cleavage of the beta-fructofuranosidic linkage in fully benzylated sucrose and sucrose-related oligosaccharides derived from lactosucrose, raffinose, melezitose, stachyose, and nystose under acidic conditions using 1:10 75% aqueous sulfuric acid-dioxane at room temperature

  通过选择性地在完全苄基化的蔗糖和衍生自乳糖蔗糖，棉子糖，松三糖，水苏糖和核糖的蔗糖相关的低聚糖中，β-果糖呋喃糖苷键的选择性裂解，成功制备了具有异头羟基的部分部分苄基化的单糖，二糖和三糖在酸性条件下，使用1:10 75％硫酸-二恶烷水溶液在室温下放置1h。
• Straightforward synthesis of protected 2-hydroxyglycals by chlorination-dehydrochlorination of carbohydrate hemiacetals
  作者：Jan Choutka、Michal Kratochvíl、Jakub Zýka、Radek Pohl、Kamil Parkan

  DOI：10.1016/j.carres.2020.108086

  日期：2020.10

  A straightforward and scalable method for the synthesis of protected 2-hydroxyglycals is described. The approach is based on the chlorination of carbohydrate-derived hemiacetals, followed by an elimination reaction to establish the glycal moiety. 1,2-dehydrochlorination reactions were studied on a range of glycosyl chlorides to provide suitable reaction conditions for this transformation. Benzyl ether

  描述了一种用于合成受保护的 2-hydroxyglycals 的简单且可扩展的方法。该方法基于碳水化合物衍生的半缩醛的氯化，然后是消除反应以建立糖基部分。研究了一系列糖基氯的 1,2- 脱氯化氢反应，以为这种转化提供合适的反应条件。发现苄基醚、异亚丙基和亚苄基保护基团以及糖苷间连接与该协议兼容。所描述的方法操作简单，可以快速制备具有除酯保护基团以外的 2-羟基糖醛，为现有方法提供了可行的替代方案。
• Regioselective Anomeric <i>O</i> ‐Benzyl Deprotection in Carbohydrates
  作者：Perali Ramu Sridhar、Bandi Anjaneyulu、Boddu Umamaheswara Rao

  DOI：10.1002/ejoc.202101033

  日期：2021.11.8

  A simple and highly regioselective hydrogenolysis of the anomeric benzyl group is reported. The generality and the scope of the reaction were evaluated by applying it to a number of diversly protected benzyl monosaccharides and disaccharides that lead to the formation of the corresponding hemiacetals in good yield.

  报道了异头苄基的简单且高度区域选择性的氢解。反应的一般性和范围是通过将其应用于许多不同保护的苄基单糖和二糖来评估的，这些苄基单糖和二糖导致以良好的产率形成相应的半缩醛。
• Study of metal and acid catalysed deprotection of propargyl ethers of alcohols via their allenyl ethers
  作者：Hari Babu Mereyala、Srinivas Reddy Gurrala、S Krishna Mohan

  DOI：10.1016/s0040-4020(99)00631-6

  日期：1999.9

  A new method for the deprotection of prop-2-ynyl ethers 1b-9b is described. Isomerisation of 1b-9b to O-allenyl ethers 1d-9d and deprotection by reaction with Hg(OCOCF3)(2), aq.HCl, aq.CF3CO2H and best by use of a catalytic amount of OsO4 is described to obtain the alcohols 1a-9a in good yield. Application of this method for the deprotection of prop-2-enyl ethers 7c,8c,10c-13c via their corresponding prop-1-enyl ethers 7e,8e,10e-13e to obtain the corresponding alcohols 7a,8a,10a-13a is also described, (C) 1999 Elsevier Science Ltd. All rights reserved.
• Synthesis of α-lactosyl-(1→3)-l-glycero-α-d-manno-heptopyranoside, a partial oligosaccharide structure expressed within the lipooligosaccharide produced by Neisseria gonorrhoeae strain 15253
  作者：Kazuyuku Ishii、Hiroyuki Kubo、Ryohei Yamasaki

  DOI：10.1016/s0008-6215(01)00282-8

  日期：2002.1

  The glycosyl donor, hepta-O-benzyl-beta-lactosyl trichloroacetimidate (4) was prepared by treating hepta-O-benzyl-lactose with trichloroacetonitrile in the presence of potassium carbonate. The acceptor, methyl 2-O-benzyl-4,6-O-benzylidene-7,8-dideoxy-alpha-D-manno-oct-7-enopyranoside (8) was synthesized by hydrolysis of a 3,4-butane diacetal of methyl L-glycero-alpha-D-manno-oct-enopyranoside and subsequent benzylidenation, Glycosidation of the donor 4 with the acceptor 8 in 1,4-dioxane using Me3SiOTf as a promoter for I h at room temperature gave methyl (2,3,4,6-tetra-O-benzyl-beta-D-galactopyranosyl)-(1-->4)-(2,3,6-tri-O-benzyl-alpha-D-glucopyranosyl)-(1-->3)-2-O-benzyl-4,6-O-benzylidene-7,8-dideoxy-alpha-D-manno-oct-7-enopyranoside (9) as a major product (59%). The oct-enopyranoside moiety of the trisaccharide 9 was converted to a heptopyranoside (80%) by oxidative cleavage with OsO4-NaIO4 and subsequent reduction. Hydrogenolysis of the resulting trisaccharide and subsequent acetylation gave the peracetate of alpha-lactosyl-(1-->3)-Hep. Deacetylation of the peracetate afforded the title trisaccharide. (C) 2002 Elsevier Science Ltd. All rights reserved.