甲基 alpha-D-呋喃木糖苷 | 1824-96-0

• 分子结构分类: 有机化合物 - 有机氧化合物
• 中文名称: 甲基 alpha-D-呋喃木糖苷
• 中文别名: 甲基alpha-D-呋喃木糖苷
• 英文名称: methyl α-D-xylofuranoside
• 英文别名: α-methyl-D-xylofuranoside；methyl-α-D-xylofuranoside；Methyl-α-D-xylofuranosid；Methyl alpha-D-xylofuranoside；(2R,3R,4R,5S)-2-(hydroxymethyl)-5-methoxyoxolane-3,4-diol
• CAS: 1824-96-0
• 化学式: C₆H₁₂O₅
• 分子量: 164.158
• InChiKey: NALRCAPFICWVAQ-MOJAZDJTSA-N

物化性质

• 密度：
  1.40

计算性质

• 辛醇/水分配系数(LogP)：
  -1.6
• 重原子数：
  11
• 可旋转键数：
  2
• 环数：
  1.0
• sp3杂化的碳原子比例：
  1.0
• 拓扑面积：
  79.2
• 氢给体数：
  3
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  甲基 alpha-D-呋喃木糖苷 在 sodium tetrahydroborate 、 三氟乙酸 、 silver(l) oxide 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 反应 25.25h， 生成 2,3,5-tri-O-benzyl-D-xylitol
  参考文献：
  名称：

  由d-木糖合成有效的和特定的对映体葡糖苷酶抑制剂，1,4-dideoxy-1,4-imino-d-arabinitol和1,4-dideoxy-1,4-imin

  摘要：

  1，4-二脱氧-1，4-亚氨基阿拉伯糖醇的两种对映体都是葡糖苷酶的特异性抑制剂。1,4-二脱氧-1,4-亚氨基-D-阿拉伯糖醇的合成涉及将木糖的C2和C5与氮连接在一起，而1,4-二脱氧-1.4-亚氨基-L-阿拉伯糖醇的合成需要C1和C4木糖通过氮连接在一起。1,4-Dideoxy-1,4-imino-D-arabinitol是天然存在的吡咯烷生物碱，存在于Standachii蜘蛛和Angylocalyx Boutiqueanus蜘蛛中。

  DOI：

  10.1016/s0040-4020(01)88174-6
• 作为产物：
  描述：

  Methyl 3,5-O-Isopropylidene-α-D-xylofuranoside 在 水 、 溶剂黄146 作用下， 反应 12.0h， 以85%的产率得到甲基 alpha-D-呋喃木糖苷
  参考文献：
  名称：

  由d-木糖合成有效的和特定的对映体葡糖苷酶抑制剂，1,4-dideoxy-1,4-imino-d-arabinitol和1,4-dideoxy-1,4-imin

  摘要：

  1，4-二脱氧-1，4-亚氨基阿拉伯糖醇的两种对映体都是葡糖苷酶的特异性抑制剂。1,4-二脱氧-1,4-亚氨基-D-阿拉伯糖醇的合成涉及将木糖的C2和C5与氮连接在一起，而1,4-二脱氧-1.4-亚氨基-L-阿拉伯糖醇的合成需要C1和C4木糖通过氮连接在一起。1,4-Dideoxy-1,4-imino-D-arabinitol是天然存在的吡咯烷生物碱，存在于Standachii蜘蛛和Angylocalyx Boutiqueanus蜘蛛中。

  DOI：

  10.1016/s0040-4020(01)88174-6

文献信息

• GLYCOSIDATION OF SUGARS: II. METHANOLYSIS OF D-XYLOSE, D-ARABINOSE, D-LYXOSE, AND D-RIBOSE
  作者：C. T. Bishop、F. P. Cooper

  DOI：10.1139/v63-405

  日期：1963.11.1

  Rates of methanolysis reactions of D-xylose, D-arabinose, D-lyxose, and D-ribose have been determined. It was found that methanolysis of a pentose proceeds to equilibrium through four distinguishable, competing reactions: (1) pentose → furanosides; (2) anomerization of furanosides; (3) furanosides → pyranosides; (4) anomerization of pyranosides. The glycoside compositions at equilibrium are interpreted in terms of stabilities of each of the four glycosides from each sugar as influenced by steric and ionic effects; a system of conformational analysis of furanoside rings is presented. The free energies of reaction in anomerization of pyranosides were in excellent agreement with values calculated from previously reported interaction energies in the pyranoid ring. The relative rates of the reactions were consistent with the view that non-bonded interactions in the methyl glycosides are relieved in the transition states for their interconversions.

  甲醇解反应的速率确定了D-木糖、D-阿拉伯糖、D-来苏糖和D-核糖的速率。发现戊糖的甲醇解反应通过四个可区分的、竞争性反应达到平衡：(1)戊糖→呋喃糖苷；(2)呋喃糖苷的异构化；(3)呋喃糖苷→吡喃糖苷；(4)吡喃糖苷的异构化。平衡时的糖苷组成是根据每种糖的四种糖苷的稳定性来解释的，这种稳定性受到立体和离子效应的影响；提出了呋喃糖苷环的构象分析方法。吡喃糖苷异构化反应的自由能变化与先前报道的吡喃环相互作用能计算出的值非常一致。这些反应的相对速率与这种观点相符，即在甲基糖苷的过渡态中，非键合相互作用得到了缓解。
• A Direct Method for the Efficient Synthesis of Benzylidene Acetal at Room Temperature
  作者：Narra Rajashekar Reddy、Rashmi Kumar、Sundarababu Baskaran

  DOI：10.1002/ejoc.201801731

  日期：2019.2.21

  developed for the efficient synthesis of benzylidene acetal from aldehyde at room temperature. In this metal‐free method, Cl3CCN serves as a water scavenger as well as reaction medium and the acid catalyst is readily recovered and recycled. At room temperature, a wide variety of aryl and α,β‐unsaturated aldehydes react readily with functionalized diols and optically active diols to furnish the corresponding

  已经开发出一种简单而直接的方法，用于在室温下从醛中高效合成亚苄基乙缩醛。在这种无金属方法中，Cl 3 CCN可用作除水剂和反应介质，并且酸催化剂易于回收和再循环。在室温下，各种各样的芳基和α，β-不饱和醛容易与官能化的二醇和旋光性二醇反应，以很高的收率提供相应的缩醛。几个敏感的官能团在反应条件下是稳定的。
• IMMUNOMODULATORY SACCHARIDE COMPOUNDS
  申请人：Lowary L. Todd

  公开号：US20070219144A1

  公开（公告）日：2007-09-20

  Compounds comprising a saccharide molecule and a 5-deoxy-5-methylthio-xylofuranose (MTX) moiety or a 5-deoxy-5-methylsulfoxy-xylofuranose (MSX) moiety, and use of such compounds in methods for modulating inflammation and immune responses.

  包含糖分子和5-去氧-5-甲硫氧基-木糖呋喃糖（MTX）基团或5-去氧-5-甲基磺氧基-木糖呋喃糖（MSX）基团的化合物，以及在调节炎症和免疫反应方法中使用这些化合物。
• Preparation of Methyl 2,3-Anhydro- and 2,3-O-Sulfinylfuranosides from Unprotected Furanosides Using the Mitsunobu Reaction
  作者：Oliver Schulze、Jürgen Voss、Gunadi Adiwidjaja

  DOI：10.1055/s-2001-10806

  日期：——

  A new two step procedure for the synthesis of methyl 2,3-anhydro-α-d-lyxofuranoside and methyl 2,3-anhydro-β-d-ribofuranoside from d-xylose involving the intramolecular Mitsunobu reaction is presented. Likewise, methyl 2,3-anhydro-α-l-lyxofuranoside is obtained from l-arabinose. Cyclic sulfites with d-ribo configuration, synthetic equivalents of the corresponding anhydrosugars, are prepared in three steps from d-ribose.

  本研究提出了一种新的两步法，通过分子内 Mitsunobu 反应从 d-xylose 合成甲基 2,3-anhydro-δ-d-lyxofuranoside 和甲基 2,3-anhydro-δ-d-ribofuranoside。同样，从 l-arabinose 中也得到了甲基 2,3-anhydro-δ-l-lyxofuranoside。以 d- 核糖为原料，通过三个步骤制备出具有 d-ribo 构型的环状亚硫酸盐，即相应无水糖的合成等价物。
• Separation process
  申请人：Heikkila Heikki

  公开号：US20050096464A1

  公开（公告）日：2005-05-05

  The invention relates to a process of recovering arabinose and optionally other monosaccharides from vegetable fiber rich in heteropolymeric arabinose, such as gum arabic. Said other monosaccharides are typically selected from galactose and rhamnose. The process of the invention comprises controlled hydrolysis of the arabinose-rich vegetable fiber and fractionation of the hydrolysis product to obtain a fraction enriched in arabinose and optionally other product fractions followed by crystallization of arabinose. The invention also relates to a novel method of crystallizing arabinose from biomass-derived material. Furthermore, the invention relates to novel crystalline L-arabinose.

  本发明涉及一种从富含异聚糖阿拉伯糖的植物纤维中回收阿拉伯糖和可选的其他单糖的过程，例如阿拉伯胶。所述其他单糖通常选自半乳糖和鼠李糖。本发明的过程包括对富含阿拉伯糖的植物纤维进行控制水解，分馏水解产物以获得富含阿拉伯糖和可选的其他产物分馏，然后结晶阿拉伯糖。本发明还涉及一种从生物质衍生材料中结晶阿拉伯糖的新方法。此外，本发明还涉及新颖的结晶L-阿拉伯糖。