O-(3,4,6-tri-O-benzyl-2-deoxy-β-D-glucopyranosyl)-(1[*]6)-1,2:3,4-di-O-isopropylidene-α-D-galactopyranose | 79384-22-8

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: O-(3,4,6-tri-O-benzyl-2-deoxy-β-D-glucopyranosyl)-(1[*]6)-1,2:3,4-di-O-isopropylidene-α-D-galactopyranose
• 英文别名: (3,4,6-tri-O-benzyl-2-deoxy-β-D-glucopyranosyl)-(1→6)-1,2:3,4-di-O-isopropylidene-α-D-galactopyranoside；(1S,2R,6R,8R,9S)-8-[[(2R,4R,5S,6R)-4,5-bis(phenylmethoxy)-6-(phenylmethoxymethyl)oxan-2-yl]oxymethyl]-4,4,11,11-tetramethyl-3,5,7,10,12-pentaoxatricyclo[7.3.0.02,6]dodecane
• CAS: 79384-22-8
• 化学式: C₃₉H₄₈O₁₀
• 分子量: 676.804
• InChiKey: TWFSCQZMGKLJLJ-CLMAEEBMSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.9
• 重原子数：
  49
• 可旋转键数：
  13
• 环数：
  7.0
• sp3杂化的碳原子比例：
  0.54
• 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：

  3,4,6-Tri-O-benzyl-β-D-glucopyranosyl-(1->6)-1,2:3,4-diisopropylidene-α-D-galactopyranoside 在 2,2'-azobisbutyronitrile 、 三正丁基氢锡 、 sodium hydride 作用下， 以 甲苯 为溶剂， 反应 18.0h， 生成 O-(3,4,6-tri-O-benzyl-2-deoxy-β-D-glucopyranosyl)-(1[*]6)-1,2:3,4-di-O-isopropylidene-α-D-galactopyranose
  参考文献：
  名称：

  Gurjar, M. K.; Ghosh, P. K., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1988, vol. 27, # 1-12, p. 1063 - 1064

  摘要：

  DOI：

文献信息

• 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。
• Stereoselective organocatalyzed glycosylations – thiouracil, thioureas and monothiophthalimide act as Brønsted acid catalysts at low loadings
  作者：G. A. Bradshaw、A. C. Colgan、N. P. Allen、I. Pongener、M. B. Boland、Y. Ortin、E. M. McGarrigle

  DOI：10.1039/c8sc02788a

  日期：——

  Thiouracil catalyzes stereoselective glycosylations with galactals in loadings as low as 0.1 mol%.

  硫尿嘧啶在载体负载量低至0.1 mol％时，催化与半乳糖醛糖苷的立体选择性糖基化。
• Stereoselective Synthesis of 2‐Deoxyglycosides from Glycals by Visible‐Light‐Induced Photoacid Catalysis
  作者：Gaoyuan Zhao、Ting Wang

  DOI：10.1002/anie.201800909

  日期：2018.5.22

  The direct, photoacid‐catalyzed synthesis of 2‐deoxyglycosides from glycals is reported. A series of phenol‐conjugated acridinium‐based organic photoacids were rationally designed, synthesized, and studied alongside the commercially available phenolic catalyst eosin Y. In the presence of such a photoacid catalyst and light, synthetic glycals were activated and coupled with a range of alcohols to afford

  据报道，由糖类直接，光酸催化合成了2-脱氧糖苷。与市售的酚催化剂曙红Y一起，合理设计，合成和研究了一系列基于酚共轭啶基的有机光酸。在这种光酸催化剂和光的存在下，合成糖被活化并与多种醇偶联以高收率和优异的α-选择性提供2-脱氧糖苷。
• 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。
• Sterically Hindered 2,4,6-Tri-<i>tert</i>-butylpyridinium Salts as Single Hydrogen Bond Donors for Highly Stereoselective Glycosylation Reactions of Glycals
  作者：Titli Ghosh、Ananya Mukherji、Pavan K. Kancharla

  DOI：10.1021/acs.orglett.9b00626

  日期：2019.5.17

  We demonstrate here that the strained and bulky protonated 2,4,6-tri-tert-butylpyridine salts serve as efficient catalysts for highly stereoselective glycosylations of various glycals. Moreover, the mechanism of action involves an interesting single hydrogen bond mediated protonation of glycals and not via the generally conceived Brønsted acid pathway. The counteranions also play a role in the outcome

  我们在这里证明，应变和庞大的质子化的2,4,6-三叔丁基吡啶盐可作为各种糖类的高度立体选择性糖基化的有效催化剂。此外，作用机理涉及有趣的单个氢键介导的糖基质子化，而不是通过通常构想的布朗斯台德酸途径。抗衡阴离子在反应结果中也起作用。