2,4,6-tri-O-methyl-D-galactose | 5856-20-2

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 2,4,6-tri-O-methyl-D-galactose
• 英文别名: 2.4.6-Trimethyl-galactose；2,4,6-Tri-O-methyl-D-galaktose；(2R,3S,4S,5R)-3,5-dihydroxy-2,4,6-trimethoxyhexanal
• CAS: 5856-20-2
• 化学式: C₉H₁₈O₆
• 分子量: 222.238
• InChiKey: LMHKDVPFDHNVFB-XAVMHZPKSA-N

物化性质

• 熔点：
  111 °C
• 沸点：
  356.3±42.0 °C(Predicted)
• 密度：
  1.169±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  -1.8
• 重原子数：
  15
• 可旋转键数：
  8
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.89
• 拓扑面积：
  85.2
• 氢给体数：
  2
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  2,4,6-tri-O-methyl-D-galactose 在 水 、 溴 作用下， 生成 O²,O⁴,O⁶-trimethyl-D-galactonic acid-5-lactone
  参考文献：
  名称：

  100.达姆森口香糖的组成。第三部分 甲基化的达姆森口香糖的水解产物

  摘要：

  DOI：

  10.1039/jr9460000506
• 作为产物：
  描述：

  methyl-[O2,O4,O6-trimethyl-O3-(toluene-4-sulfonyl)-β-D-galactopyranoside] 在 盐酸 、 甲醇 、 sodium methylate 作用下， 生成 2,4,6-tri-O-methyl-D-galactose
  参考文献：
  名称：

  223. 2：4：6-三甲基半乳糖及其α-和β-甲基半乳糖苷

  摘要：

  DOI：

  10.1039/jr9380001196

文献信息

• Synthesis of p-nitrophenyl 3-O-β-d-galactopyranosyl-β-d-galactopyranoside and p-nitrophenyl 3-O-α-d-galactopyranosyl-β-d-galactopyranoside
  作者：Saeed A. Abbas、Joseph J. Barlow、Khushi L. Matta

  DOI：10.1016/s0008-6215(00)81003-4

  日期：1982.3

  3:1. The structures of 4 , 6 , 8 , and 10 were evidenced by their respective 1 H-n.m.r. spectra. O -Deacetylation of 4 and 6 afforded, respectively, p -nitrophenyl 3- O -α- d -galactopyranosyl-β- d -galactopyranoside ( 5 ) and p -nitrophenyl 3- O -β- d -galactopyranosyl-β- d -galactopyranoside ( 7 ). O -Deacylation of 8 and 10 furnished the disaccharide derivatives ( 9 and 11 ). Cleavage of the benzylidene

  摘要对硝基苯基2,4,6-三-O-乙酰基-β-d-吡喃半乳糖苷（2）与2,3,4,6-四-O-乙酰基-α-d的糖基化反应（氰化汞催化）在乙腈中的-半乳糖基吡喃糖基溴化物以几乎相等的比例提供α-（1→3）-和β-（1→3）连接的二糖七乙酸酯（分别为4和6）。对-硝基苯基2-O-苯甲酰基-4,6-O-亚苄基-β-d-吡喃半乳糖苷（3）的类似糖基化反应产生了β-（1→3）-和α-（1→3）-相连，以3：1的比例完全保护的二糖衍生物（分别为8和10）。4，6，8和10的结构由它们各自的1 Hn.mr光谱证明。4和6的O-脱乙酰基分别提供对-硝基苯基3- O-α-d-吡喃半乳糖基-β-d-吡喃半乳糖苷（5）和对-硝基苯基3- O-β-d-吡喃半乳糖基-β-d-半乳糖吡喃糖苷（7）。8和10的O-脱酰作用提供了二糖衍生物（9和11）。9和11的亚苄基的切割分别给出了二糖7和5。5，7，9和11的结构是通过13
• New Constituent from Argemone mexicana Linn.
  作者：Raj N. Yadava、Jay D. Sharma、Anurekha Yadav

  DOI：10.14233/ajchem.2014.15450

  日期：——

  The present paper reports the isolation and structure elucidation of a new compound A identified as 5,7,4-trihydroxy-8-methoxy flavanone-4-a-L-rhamno-pyranosyl-7-O-b-D-xylopyranosyl-(1®3)-O-b-D-galactopyranoside along with two known compounds B and C identified as chrysoeriol and tricin, respectively from the methanolic extract of the defatted seeds of the plant by various colour reactions, chemical degradation and spectral analysis.

  本文报告了通过各种颜色反应、化学降解和光谱分析，从该植物脱脂种子的甲醇提取物中分离并阐明了一种新化合物 A（5,7,4-三羟基-8-甲氧基黄烷酮-4-a-L-鼠李糖基-7-O-b-D-吡喃木糖基-(1®3)-O-b-D-吡喃半乳糖苷）以及两种已知化合物 B 和 C（分别为 Chrysoeriol 和 tricin）的结构。
• Methods and products for the synthesis of oligosaccharide structures on glycoproteins, glycolipids, or as free molecules, and for the isolation of cloned genetic sequences that determine these structures
  申请人：The Regents of the University of Michigan

  公开号：US20020102688A1

  公开（公告）日：2002-08-01

  A method for isolating a gene, comprising: (i) isolating a cell possessing a post-translational characteristic of interest, said post-translational characteristic being the presence of a membrane-bound oligosaccharide or polysaccharide of interest on the surface of said cell, the presence of a soluble oligosaccharide or polysaccharide of interest in an extract of said cell, or the presence of a particularly glycosyltransferase activity in an extract of said cell; (ii) creating a genetic library of either cDNA or genomic DNA from the genetic material of said isolated cell; (iii) transforming host cells with said genetic library; and (iv) screening said transformed host cells for a host cell containing said post-translational characteristic, thereby obtaining a cell containing said gene, is disclosed. The method can be used to obtain genes encoding glycosyltransferases.

  一种分离基因的方法，包括：（i）分离具有感兴趣的后翻译特征的细胞，该后翻译特征是感兴趣的膜结合寡糖或多糖在该细胞表面的存在，感兴趣的寡糖或多糖在该细胞提取物中的存在，或者在该细胞提取物中具有特定的糖基转移酶活性；（ii）从所分离的细胞的遗传物质中创建cDNA或基因组DNA的基因库；（iii）将宿主细胞转化为该基因库；和（iv）筛选所转化的宿主细胞，以获得包含该基因的细胞，从而获得包含该基因的细胞。该方法可用于获得编码糖基转移酶的基因。
• Novel polysaccharides, process for producing polysaccharides, uses of polysaccharides and Azotobacter beijerinckii TNM1
  申请人：TAYCA CORPORATION

  公开号：EP0613951A2

  公开（公告）日：1994-09-07

  Disclosed are novel polysaccharides having the following physicochemical properties: (1) a molecular weight determined by gel filtration chromatography is about 5 × 10³ to 10 × 10⁶, (2) the constituent glycoses are D-galacturonic acid, L-rhamnose and D-glucose, (3) the constituent glycoses are joined substantially by 1,3-linkages, and (4) a configuration of D-galacturonic acid is α, that of L-rhamnose is β and that of D-glucose is α. A process for producing polysaccharides composed of D-galacturonic acid, L-rhamnose and D-glucose, use of the polysaccharides and a strain for producing the polysaccharides are also disclosed.

  所公开的新型多糖具有以下理化特性：(1) 通过凝胶过滤色谱法测定的分子量约为 5 × 10³ 至 10 × 10⁶；(2) 构成糖的成分为 D-半乳糖醛酸、L-鼠李糖和 D-葡萄糖；(3) 构成糖的成分基本上通过 1,3 联结连接；(4) D-半乳糖醛酸的构型为 α，L-鼠李糖的构型为 β，D-葡萄糖的构型为 α。此外，还公开了一种生产由 D-半乳糖醛酸、L-鼠李糖和 D-葡萄糖组成的多糖的工艺、多糖的用途以及生产多糖的菌株。
• Humectant, antistatic agent, dispersant and film-forming agent having polysaccharide as active principle, preparation process of polysaccharides, and Klebsiella strain
  申请人：TAYCA CORPORATION

  公开号：EP0735049A2

  公开（公告）日：1996-10-02

  The disclosure describes a humectant, antistatic agent, film-forming agent or dispersant comprising an effective amount of a polysaccharide composed of D-glucuronic acid, L-rhamnose, D-galactose and D-glucose in a molar ratio of D-glucuronic acid : L-rhamnose :D-galactose : D-glucose = 0.8-1.2 : 2.4-3.6 : 0.8-1.2 : 0.8-1.2.

  本公开描述了一种保湿剂、抗静电剂、成膜剂或分散剂，它包含有效量的由 D-葡萄糖醛酸、L-鼠李糖、D-半乳糖和 D-葡萄糖组成的多糖，其摩尔比为 D-glucuronic acid ：L-鼠李糖:D-半乳糖:D-葡萄糖=0.8-1.2:2.4-3.6:0.8-1.2:0.8-1.2。