甲基-6-脱氧-β-D-半乳糖苷 | 24332-98-7

• 分子结构分类: 有机化合物 - 有机氧化合物
• 中文名称: 甲基-6-脱氧-β-D-半乳糖苷
• 英文名称: methyl β-D-fucopyranoside
• 英文别名: Methyl beta-d-fucopyranoside；(2R,3R,4S,5R,6R)-2-methoxy-6-methyloxane-3,4,5-triol
• CAS: 24332-98-7；1198-82-9
• 化学式: C₇H₁₄O₅
• 分子量: 178.185
• InChiKey: OHWCAVRRXKJCRB-VOQCIKJUSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -1.6
• 重原子数：
  12
• 可旋转键数：
  1
• 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

安全信息

• 海关编码：
  2932999099

反应信息

• 作为反应物：
  描述：

  甲基-6-脱氧-β-D-半乳糖苷 在 palladium on activated charcoal 吡啶 、 氢气 、 sodium methylate 、 二甲基二环氧乙烷 、 叠氮化四丁基铵 、 三氯化硼 作用下， 以 甲醇 、 二氯甲烷 、 丙酮 、 乙腈 为溶剂， 生成 (2R,3S,4S)-2-[(1R)-1-hydroxyethyl]-1-oxido-3,4-dihydro-2H-pyrrol-1-ium-3,4-diol
  参考文献：
  名称：

  esperamicins的立体化学研究：羟氨基糖片段的绝对构型的测定。

  摘要：

  β-D-葡萄糖-己基吡喃糖构型已被分配给埃斯帕米霉素A 1的羟氨基糖片段。该测定结果结束了我们对埃斯帕霉素的碳水化合物部分的绝对构型的研究。

  DOI：

  10.1016/s0040-4039(00)85979-1
• 作为产物：
  描述：

  Methyl 2,3,4-Tri-O-acetyl-6-deoxy-β-D-galactopyranoside 在 甲醇 、 sodium t-butanolate 作用下， 生成 甲基-6-脱氧-β-D-半乳糖苷
  参考文献：
  名称：

  适应 Zemplén 的条件，以一种简单且高度选择性的方法来处理甲基 1,2-反式糖苷

  摘要：

  1,2-反式甲基糖苷可以很容易地从全乙酰化糖中获得，方法是将它们最初转化为糖基碘供体，然后将这些糖基暴露于稍过量的甲醇钠甲醇中。在这些条件下，一组不同的单糖和双糖前体以令人满意的产率（在 59-81% 的范围内）提供相应的 1,2-反式糖苷和伴随的脱-O-乙酰化。当使用 GlcNAc 糖基氯作为供体时，类似的方法也被证明是有效的。

  DOI：

  10.1016/j.carres.2023.108824

文献信息

• Access to Antigens Related to Anthrose Using Pivotal Cyclic Sulfite/Sulfate Intermediates
  作者：Ophélie Milhomme、Cédric John、Florence Djedaïni-Pilard、Cyrille Grandjean

  DOI：10.1021/jo200340q

  日期：2011.8.5

  important antigenic determinants. A novel entry to anthrose-containing antigens and precursors is described. The synthetic route, starting from d(+)-fucose, makes use of intermediates featuring a cyclic sulfite or sulfate function which serves successively as a protecting and a leaving group.

  炭疽是炭疽芽孢杆菌外孢子主要糖蛋白的四糖侧链的上游末端单位，是重要抗原决定簇的一部分。描述了一种新的进入含蔗糖的抗原和前体的方法。从d（+）-岩藻糖开始的合成路线利用了具有环状亚硫酸盐或硫酸盐功能的中间体，这些中间体连续用作保护基和离去基团。
• Regioselective benzoylation of glycopyranosides by benzoic anhydride in the presence of Cu(CF3COO)2
  作者：Evgeny V. Evtushenko

  DOI：10.1016/j.carres.2012.06.020

  日期：2012.10

  Benzoylation of methyl and benzyl glycopyranosides by benzoic anhydride in acetonitrile in the presence of copper(II) trifluoroacetate as a promoter has given monobenzoates with a good yield and high regioselectivity. The composition of monobenzoates depended both on a configuration of hydroxyl groups and on a configuration of aglycone. The simple syntheses of the monobenzoates of some glycosides are

  在三氟乙酸铜（II）作为促进剂的存在下，在乙腈中通过苯甲酸酐在苯甲腈中对甲基和苄基吡喃葡萄糖苷进行苯甲酰化，得到了单苯甲酸酯，具有良好的收率和较高的区域选择性。单苯甲酸酯的组成取决于羟基的构型和糖苷配基的构型。提供了一些糖苷的单苯甲酸酯的简单合成。
• Properties of 13C-N.M.R. spectra of O-(1-carboxyethylidene) derivatives of methyl β-d-galactopyranoside: models for determination of pyruvic acid acetal structures in polysaccharides
  作者：Philip A.J. Gorin、Mytosk Mazurek、Helena S. Duarte、Marcello Iacomini、José H. Duarte

  DOI：10.1016/s0008-6215(00)81021-6

  日期：——

  could be assigned a structure corresponding, in the positions of acetal substitution and acetal configuration, to structure 6 . Compound 6 (barium salt) is of interest as its 13 C-n.m.r. spectrum lacks non-protonated carbonyl and acetal carbon resonances, when obtained by the usual procedures. While this is principally because of long T 1 values, the non-protonated acetal carbon signals are comparatively

  摘要记录了与半乳糖吡喃糖和褐藻糖衍生物连接的O-（1-羧乙叉基）化合物的CN.mr光谱。这些化合物可用作确定多糖中丙酮酸缩醛取代基的位置和构型的辅助剂。非质子化缩醛碳的化学位移取决于缩醛环是5元（δc 107-109.5）还是6元（δc 100.5-102.4）。3,4-（1-羧乙叉基）乙缩醛的C-3信号很典型，在〜δc 81处，对于甲基β-d-吡喃半乳糖苷衍生物的钡盐而言。确切值取决于配置，无论是6（δc 81.1）还是5（δc 80.4）。质子-核磁共振谱的CH 3信号在诊断上也有用，分别位于δ1.97和2.07。（上述移位值是pH依赖性的）。来自蜗牛的丙酮酸半乳聚糖，Pomacea lineata，显示含有一些残基，这些残基可以被分配一个在乙缩醛取代和乙缩醛构型对应于结构6的结构。化合物6（钡盐）是令人感兴趣的，因为当通过常规方法获得时，其13 Cn.mr光谱缺乏非质子化的羰基和乙缩醛碳共振。尽管这主要是由于T
•  -D-Galactosidase from Paenibacillus thiaminolyticus catalyzing transfucosylation reactions
  作者：E. Benesova、P. Lipovova、H. Dvorakova、B. Kralova

  DOI：10.1093/glycob/cwp196

  日期：2010.4.1

  A genomic library of bacterial strain Paenibacillus thiaminolyticus was constructed and the plasmid DNA of the clone, containing the gene encoding β-d-galactosidase with β-d-fucosidase activity, detected by 5-bromo-4-chloro-3-indoxyl β-d-galactopyranoside, was sequenced. Cells of Escherichia coli BL21 (DE3) were used for production of the enzyme in the form of a histidine-tagged protein. This recombinant fusion protein was purified using Ni-NTA agarose affinity chromatography and characterized by using p-nitrophenyl β-d-fucopyranoside (Km value of (1.18 ± 0.06) mmol/L), p-nitrophenyl β-d-galactopyranoside (Km value of (250 ± 40) mmol/L), p-nitrophenyl β-d-glucopyranoside (Km value of (77 ± 6) mmol/L), and lactose (Km value of (206 ± 5) mmol/L) as substrates. Optimal pH and temperature were estimated as 5.5 and 65°C, respectively. According to the amino acid sequence, the molecular weight of the fusion protein was calculated to be 68.6 kDa and gel filtration chromatography confirmed the presence of the enzyme in a monomeric form. In the following step, its ability to catalyze transfucosylation reactions was tested. The enzyme was able to catalyze the transfer of fucosyl moiety to different p-nitrophenyl glycopyranosides (producing p-nitrophenyl β-d-fucopyranosyl-(1,3)-β-d-fucopyranoside, p-nitrophenyl β-d-fucopyranosyl-(1,3)-α-d-glucopyranoside, p-nitrophenyl β-d-fucopyranosyl-(1,3)-α-d-mannopyranoside, and p-nitrophenyl β-d-fucopyranosyl-(1,6)-α-d-galactopyranoside) and alcohols (producing methyl β-d-fucopyranoside, ethyl β-d-fucopyranoside, 1-propyl β-d-fucopyranoside, 2-propyl β-d-fucopyranoside, 1-octyl β-d-fucopyranoside, and 2-octyl β-d-fucopyranoside). These results indicate the possibility of utilizing this enzyme as a promising tool for enzymatic synthesis of β-d-fucosylated molecules.

  构建了细菌株Paenibacillus thiaminolyticus的基因组文库，并对克隆中包含编码具有β-d-岩藻糖苷酶活性的β-d-半乳糖苷酶基因的质粒DNA进行了测序。采用大肠杆菌BL21（DE3）细胞生产该酶，形式为带有组氨酸标签的蛋白质。使用Ni-NTA琼脂糖亲和层析纯化了该重组融合蛋白，并通过使用对硝基苯基β-d-岩藻糖吡喃苷（Km值为(1.18 ± 0.06) mmol/L）、对硝基苯基β-d-半乳糖吡喃苷（Km值为(250 ± 40) mmol/L）、对硝基苯基β-d-葡萄糖吡喃苷（Km值为(77 ± 6) mmol/L）和乳糖（Km值为(206 ± 5) mmol/L）作为底物进行特征分析。最佳pH和温度分别估计为5.5和65°C。根据氨基酸序列计算，该融合蛋白的分子量为68.6 kDa，凝胶过滤层析确认该酶以单体形式存在。在接下来的步骤中，测试其催化转岩藻糖化反应的能力。该酶能够催化将岩藻糖基转移到不同的对硝基苯基糖吡喃苷上（生成对硝基苯基β-d-岩藻糖苷-(1,3)-β-d-岩藻糖苷、对硝基苯基β-d-岩藻糖苷-(1,3)-α-d-葡萄糖苷、对硝基苯基β-d-岩藻糖苷-(1,3)-α-d-甘露糖苷和对硝基苯基β-d-岩藻糖苷-(1,6)-α-d-半乳糖苷）和醇类（生成甲基β-d-岩藻糖苷、乙基β-d-岩藻糖苷、1-丙基β-d-岩藻糖苷、2-丙基β-d-岩藻糖苷、1-辛基β-d-岩藻糖苷和2-辛基β-d-岩藻糖苷）。这些结果表明使用该酶作为酶促合成β-d-岩藻糖化分子的有希望工具的可能性。
• Studies on the constituents of the root of Polygala tenuifolia Willdenow. II. On the structures of onjisaponins A, B and E.
  作者：SEIICHI SAKUMA、JUNZO SHOJI

  DOI：10.1248/cpb.30.810

  日期：——

  The structures of three triterpenoidal saponins, onjisaponins A (1), B (2) and E (3), were determined on the basis of spectral and chemical evidence as presenegenin-(3)-β-D-glucopyranosido-(28)-2-O-[β-D-apio-D-furanosyl (1→3)] [β-D-galactopyranosyl (1→4)-β-D-xylopyranosyl (1→4)]-α-L-rhamnopyranosyl}-3-O-(α-L-rhamnopyranosyl)-4-O-(4'-methoxy-cinnamoyl)-β-D-fucopyranoside, presenegenin-(3)-β-D-glucopyranosido-(28)-2-O-[β-D-galactopyranosyl (1→4)-β-D-xylopyranosyl (1→4)-α-L-rhamnopyranosyl]-3-O-(α-L-rhamnopyranosyl)-4-O-(4'-methoxycinnamoyl)-β-D-fucopyranoside (=senegin III) and presenegenin- (3)-O-β-D-glucopyranosido-(28)-2-O-[β-D-galactopyranosyl (1→4)-β-D-xylopyranosyl (1→4)-α-L-rhamnopyranosyl]-4-O-(3', 4', 5'-trimethoxycinnamoyl)-β-D-fucopyranoside, respectively. The 13C nuclear magnetic resonance spectra of onjisaponins A, B, E and their derivatives were investigated and each carbon signal was assigned as shown in Table I.

  三种三萜皂苷的结构，即翁鸡皂苷A（1）、B（2）和E（3），是基于光谱和化学证据确定的，其结构分别为：presenegenin-(3)-β-D-glucopyranosido-(28)-2-O-[β-D-apio-D-furanosyl (1→3)] [β-D-galactopyranosyl (1→4)-β-D-xylopyranosyl (1→4)]-α-L-rhamnopyranosyl}-3-O-(α-L-rhamnopyranosyl)-4-O-(4'-methoxy-cinnamoyl)-β-D-fucopyranoside，presenegenin-(3)-β-D-glucopyranosido-(28)-2-O-[β-D-galactopyranosyl (1→4)-β-D-xylopyranosyl (1→4)-α-L-rhamnopyranosyl]-3-O-(α-L-rhamnopyranosyl)-4-O-(4'-methoxycinnamoyl)-β-D-fucopyranoside（=senegin III）和presenegenin-(3)-O-β-D-glucopyranosido-(28)-2-O-[β-D-galactopyranosyl (1→4)-β-D-xylopyranosyl (1→4)-α-L-rhamnopyranosyl]-4-O-(3', 4', 5'-trimethoxycinnamoyl)-β-D-fucopyranoside。对翁鸡皂苷A、B、E及其衍生物的13C核磁共振光谱进行了研究，并对每个碳信号进行了如表I所示的赋值。