galactose

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: galactose
• 英文别名: (2R,3S,4S)-2,3,4,5,6-pentahydroxyhexanal
• 化学式: C₆H₁₂O₆
• 分子量: 180.158
• InChiKey: GZCGUPFRVQAUEE-CEZCPVKQSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -2.9
• 重原子数：
  12
• 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：
  118
• 氢给体数：
  5
• 氢受体数：
  6

反应信息

• 作为产物：
  描述：

  galactitol 在 manganese(III) pyrophosphate 、 硫酸 作用下， 以 水 为溶剂， 生成 galactose
  参考文献：
  名称：

  Kinetics of reactions of manganese(III) pyrophosphate with some hexitols

  摘要：

  DOI：

  10.1016/0008-6215(83)88273-1

文献信息

• The formoin reaction
  作者：Josep Castells、Francisco López-Calahorra、Fernando Geijo

  DOI：10.1016/0008-6215(83)88109-9

  日期：1983.6

  Abstract The formoin reaction, i.e. , the autocondensation of formaldehyde in an aprotic solvent catalysed by the conjugate base of a thiazolium ion, has been studied in detail. Glucose, galactose, dihydroxyacetone dimer, xylose, and arabinose have been identified as products. The influence of catalysts, temperature, basicity, and reaction time is documented. N , N -Dimethylformamide is a more convenient

  摘要详细研究了甲醛化反应，即噻唑鎓离子的共轭碱在非质子传递溶剂中甲醛的自缩合反应。葡萄糖，半乳糖，二羟基丙酮二聚体，木糖和阿拉伯糖已被鉴定为产品。记录了催化剂，温度，碱度和反应时间的影响。N，N-二甲基甲酰胺是比醚，苯或二甘醇二甲醚更方便的溶剂。乙二异丙基胺提供的碳水化合物原料比三乙胺更好。在≤60°时，醛醇缩合降至最低。反应1-2小时后（取决于条件），产量开始下降并在约24小时后变为零。
• Beta-xylosidase for conversion of plant cell wall carbohydrates to simple sugars
  申请人：Jordan Douglas B.

  公开号：US20090280541A1

  公开（公告）日：2009-11-12

  Xylose-containing plant material may be hydrolyzed to xylose using a β-D-xylosidase which exhibits unexpectedly high activity. The enzyme has a k cat value for catalysis of approximately 185 sec −1 for 1,4-β-D-xylobiose (X2) when measured at a pH of 5.3 and a temperature of 25° C.; this is at least 10-fold greater than reported for other xylosidases at 25° C. and their optimal pH. The enzyme also has an isoelectric point of approximately 4.4. When reacted at a pH between about 4.5 and about 7.7, the β-D-xylosidase exhibits surprisingly high activity for hydrolyzing xylose-containing plant materials to xylose. The xylose released from plant materials may then be converted to other secondary products such as ethanol by fermentation or other reaction. This β-D-xylosidase may be used alone or in combination with other hydrolytic or xylanolytic enzymes for treatment of lignocellulosic or hemicellulosic plant materials or plant material hydrolysates or xylooligosaccharides.
• US7993884B2
  申请人：——

  公开号：US7993884B2

  公开（公告）日：2011-08-09