O²-methyl-D-xylose | 7434-28-8

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: O²-methyl-D-xylose
• 英文别名: 2-O-methyl-xylose；2-o-Methylxylose；(2R,3S,4R)-3,4,5-trihydroxy-2-methoxypentanal
• CAS: 7434-28-8
• 化学式: C₆H₁₂O₅
• 分子量: 164.158
• InChiKey: ALNDFFUAQIVVPG-SRQIZXRXSA-N

物化性质

• 熔点：
  132-133 °C
• 沸点：
  394.2±42.0 °C(Predicted)
• 密度：
  1.314±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  -1.8
• 重原子数：
  11
• 可旋转键数：
  5
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.83
• 拓扑面积：
  87
• 氢给体数：
  3
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  O²-methyl-D-xylose 、 乙硫醇 在 盐酸 作用下， 生成 O²-methyl-D-xylose diethyl dithioacetal
  参考文献：
  名称：

  p-Toluenesulfonylation of O-methyl derivatives of D-xylose dialkyl dithioacetals

  摘要：

  DOI：

  10.1016/s0008-6215(00)82928-6

文献信息

• Analysis of mixtures of some mono-O-methylaldoses with the common aldoses by g.l.c.-m.s. after isopropylidenation
  作者：Kai H. Aamlid、Svein Morgenlie

  DOI：10.1016/0008-6215(83)88350-5

  日期：1983.12

  Abstract The O-isopropylidene derivatives of seven naturally occurring mono-O-methylaldoses have been characterised by g.l.c.-m.s. G.l.c. conditions have been found under which almost complete separation of the O-methyl sugars and the common aldoses as their O-isopropylidene derivatives can be achieved. This analysis procedure has been applied to the hydrolysates of three polysaccharides that contain

  摘要已经通过glc-ms Glc条件表征了七个天然存在的单-O-甲基醛糖的O-异亚丙基衍生物，在该条件下，O-甲基糖和普通醛糖几乎可以完全分离，因为它们的O-异亚丙基衍生物可以被分离。实现。该分析程序已应用于含有O-甲基糖的三种多糖的水解产物。
• METHODS FOR THE ECONOMICAL PRODUCTION OF BIOFUEL FROM BIOMASS
  申请人：Hawkins Andrew C.

  公开号：US20090226990A1

  公开（公告）日：2009-09-10

  Methods for producing a biofuel are provided. Also provided are biocatalysts that convert a feedstock to a biofuel.

  提供生产生物燃料的方法。还提供将原料转化为生物燃料的生物催化剂。
• RENEWABLE COMPOSITIONS
  申请人：GEVO, INC.

  公开号：US20140163267A1

  公开（公告）日：2014-06-12

  The present invention is directed to renewable compositions derived from fermentation of biomass, and integrated methods of preparing such compositions.

  本发明涉及从生物质发酵中获得的可再生组合物，以及制备这种组合物的综合方法。
• [EN] INTEGRATED PROCESS TO SELECTIVELY CONVERT RENEWABLE ISOBUTANOL TO P-XYLENE<br/>[FR] PROCÉDÉ INTÉGRÉ PERMETTANT DE CONVERTIR SÉLECTIVEMENT DE L'ISOBUTANOL RENOUVELABLE EN P-XYLÈNE
  申请人：GEVO INC

  公开号：WO2011044243A1

  公开（公告）日：2011-04-14

  The present invention is directed to a method for preparing renewable and relatively high purity p-xylene from biomass. For example, biomass treated to provide a fermentation feedstock is fermented with a microorganism capable of producing a C4 alcohol such as isobutanol, then sequentially dehydrating the isobutanol in the presence of a dehydration catalyst to provide a C4 alkene such as isobutylene, dimerizing the C4 alkene to a form one or more C8 alkenes such as 2,4,4-trimethylpentenes or 2,5-dimethylhexene, then dehydrocyclizing the C8 alkenes in the presence of a dehydrocyclization catalyst to selectively form renewable p-xylene in high overall yield. The p-xylene can then be oxidized to form terephthalic acid or terephthalate esters.

  本发明涉及一种从生物质制备可再生和相对高纯度对二甲苯的方法。例如，经过处理以提供发酵原料的生物质与能够产生C4醇（如异丁醇）的微生物发酵，然后在脱水催化剂的存在下顺序脱水异丁醇以提供C4烯烃（如异丁烯），将C4烯烃二聚化为一个或多个C8烯烃（如2,4,4-三甲基戊烯或2,5-二甲基己烯），然后在去氢环化催化剂的存在下去氢环化C8烯烃以有选择性地形成高总产率的可再生对二甲苯。然后，对二甲苯可以氧化形成对苯二甲酸或对苯二甲酸酯。
• 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。