methyl 3,4,6-tri-O-benzyl-α-D-glucopyranosyl-(1->4)-2,3,6-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-α-D-glucopyranosyl-(1->4)-2,3,6-tri-O-benzyl-α-D-glucopyranoside
• 英文别名: Bn(-3)[Bn(-4)][Bn(-6)]Glc(a1-4)[Bn(-2)][Bn(-3)][Bn(-6)]a-Glc1Me；(2R,3R,4R,5R,6R)-2-[(2R,3R,4S,5R,6S)-6-methoxy-4,5-bis(phenylmethoxy)-2-(phenylmethoxymethyl)oxan-3-yl]oxy-4,5-bis(phenylmethoxy)-6-(phenylmethoxymethyl)oxan-3-ol
• 化学式: C₅₅H₆₀O₁₁
• 分子量: 897.075
• InChiKey: RKVLLPBYSUJMLO-TTWHMWBKSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  7.4
• 重原子数：
  66
• 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：
  113
• 氢给体数：
  1
• 氢受体数：
  11

反应信息

• 作为产物：
  描述：

  2-O-(2-iodo-1-(methyl-2,3,6-tri-O-benzyl-α-D-glucopyranosid-4-O-yl)-propyl)-3,4,6-tri-O-benzyl-β-D-glucopyranosyl fluoride 在 2,6-二叔丁基-4-甲基吡啶 、 silver trifluoromethanesulfonate 、 tin(ll) chloride 、 三氟乙酸 作用下， 以 1,2-二氯乙烷 、 水 为溶剂， 反应 0.5h， 以45%的产率得到methyl 3,4,6-tri-O-benzyl-α-D-glucopyranosyl-(1->4)-2,3,6-tri-O-benzyl-α-D-glucopyranoside
  参考文献：
  名称：

  烯丙基保护基介导的糖基氟化物的分子内糖苷配基传递（IAD）

  摘要：

  2-O-烯丙基保护的葡萄糖基和甘露糖基氟化物的 立体特异性1,2- 顺式 糖基化可以 通过 一系列烯丙基异构化，N-碘代琥珀酰亚胺介导的束缚和分子内糖苷配基递送（IAD）实现。氟化物作为异头离去基团是有利的，因为延长的反应时间可用于束缚受阻的糖苷配基醇而没有竞争性的异头活化。氯化锡（II）介导的分子内糖基化反应以完全立体选择性的方式提供了所需的α-葡萄糖苷和β-甘露糖苷。

  DOI：

  10.1007/s007060200020

文献信息

• Stereospecific Synthesis of 1,2-<i>cis</i> Glycosides by Allyl-Mediated Intramolecular Aglycon Delivery. 2. The Use of Glycosyl Fluorides
  作者：Ian Cumpstey、Antony J. Fairbanks、Alison J. Redgrave

  DOI：10.1021/ol016175a

  日期：2001.7.1

  [reaction: see text] Stereospecific 1,2-cis glycosylation of 2-O-allyl-protected glucosyl and mannosyl fluorides via a sequence of allyl isomerization, N-iodosuccinimide-mediated tethering, and intramolecular aglycon delivery (IAD) is reported. The use of fluoride as anomeric leaving group is advantageous in that tethering efficiencies can be increased for hindered aglycon alcohols by the use of extended reaction

  [反应：见正文]据报道，通过烯丙基异构化，N-碘代琥珀酰亚胺介导的束缚和分子内糖苷配基递送（IAD）的序列，2-O-烯丙基保护的葡萄糖基和甘露糖基氟化物的立体特异性1,2-顺式糖基化。使用氟化物作为端基异构离去基团是有利的，因为通过使用延长的反应时间而没有竞争性端基异构活化，可以提高对受阻糖苷醇的束缚效率。分子内糖基化以完全立体选择性的方式提供所需的α-葡萄糖苷和β-甘露糖苷。
• Ni(II)-Catalyzed Regio- and Stereoselective O-Alkylation for the Construction of 1,2-<i>cis</i>-Glycosidic Linkages
  作者：Yingle Feng、Tiantian Guo、Han Yang、Guoqiang Liu、Qi Zhang、Shengyong Zhang、Yonghai Chai

  DOI：10.1021/acs.orglett.2c02419

  日期：2022.9.2

  A transition-metal-catalyzed O-alkylation for the regio- and stereoselective construction of 1,2-cis-glycosidic linkages is presented. With nonprecious and readily available Ni(II) as a catalyst, 1,2-cis-glycosides were obtained via O-alkylation of 1,2-carbohydrate diols that can be accessed in a small number of steps. The tedious design of protecting groups or anomeric leaving groups could be avoided

  提出了一种用于区域选择性和立体选择性构建 1,2-顺式-糖苷键的过渡金属催化的O-烷基化。使用非贵重且易于获得的 Ni(II) 作为催化剂，通过 1,2-碳水化合物二醇的O-烷基化可通过少量步骤获得1,2-顺式糖苷。这种方法可以避免繁琐的保护基团或异头离去基团的设计。该策略用于有效制备重要的商业化糖苷相容性溶质 GG、其衍生物 MGG 和支链 α-葡聚糖。
• Stereospecific Synthesis of 1,2-<i>cis</i> Glycosides by Vinyl-Mediated IAD
  作者：Kampanart Chayajarus、David J. Chambers、Majid J. Chughtai、Antony J. Fairbanks

  DOI：10.1021/ol048427o

  日期：2004.10.1

  (GRAPHICS)Stereospecific 1,2-cis glycosylation of 2-O-vinyl thioglycosides, synthesized from the corresponding alcohols by Ir-catalyzed transvinylation with vinyl acetate, is achieved by iodine-mediated tethering of a range of primary and secondary carbohydrate acceptors, followed by intramolecular aglycon delivery (IAD). The use of such an intramolecular glycosylation strategy furnishes the desired alpha-gluco and beta-manno disaccharides in an entirely stereoselective manner.
• Stereoelectronic Effects Determine Oxacarbenium vs β-Sulfonium Ion Mediated Glycosylations
  作者：Thomas J. Boltje、Jin-Hwan Kim、Jin Park、Geert-Jan Boons

  DOI：10.1021/ol1027267

  日期：2011.1.21

  Activation of a glycosyl donor protected with a 2-O-(S)-(phenylthiomethyl)benzyl ether chiral auxiliary results in the formation of an anomeric beta-sulfonium ion, which can be displaced with sugar alcohols to give corresponding a-glycosides. Sufficient deactivation of such glycosyl donors by electron-withdrawing protecting groups is, however, critical to avoid glycosylation of an oxacarbenium ion intermediate. The latter type of glycosylation pathway can also be suppressed by installing additional substituents in the chiral auxiliary.
• Allyl Protecting Group Mediated Intramolecular Aglycon Delivery (IAD) of Glycosyl Fluorides
  作者：Ian Cumpstey、Antony J. Fairbanks、Alison J. Redgrave

  DOI：10.1007/s007060200020

  日期：2002.4.1

  sequence of allyl isomerization, N-iodosuccinimide mediated tethering, and intramolecular aglycon delivery (IAD). Fluoride is advantageous as an anomeric leaving group since extended reaction times can be employed to tether hindered aglycon alcohols without competitive anomeric activation. Tin(II) chloride mediated intramolecular glycosylation furnishes the desired α-glucosides and β-mannosides in an

  2-O-烯丙基保护的葡萄糖基和甘露糖基氟化物的 立体特异性1,2- 顺式 糖基化可以 通过 一系列烯丙基异构化，N-碘代琥珀酰亚胺介导的束缚和分子内糖苷配基递送（IAD）实现。氟化物作为异头离去基团是有利的，因为延长的反应时间可用于束缚受阻的糖苷配基醇而没有竞争性的异头活化。氯化锡（II）介导的分子内糖基化反应以完全立体选择性的方式提供了所需的α-葡萄糖苷和β-甘露糖苷。