摩熵化学
数据库官网
小程序
打开微信扫一扫
首页 分子通 化学资讯 化学百科 反应查询 关于我们
请输入关键词

4-O-methyl-D-glucopyranose

中文名称
——
中文别名
——
英文名称
4-O-methyl-D-glucopyranose
英文别名
4-O-methyl-glucopyranose;(3R,4R,5S,6R)-6-(hydroxymethyl)-5-methoxyoxane-2,3,4-triol
4-O-methyl-D-glucopyranose化学式
CAS
——
化学式
C7H14O6
mdl
——
分子量
194.185
InChiKey
UGQUOHHDWLIZQM-YDEIVXIUSA-N
BEILSTEIN
——
EINECS
——
  • 物化性质
  • 计算性质
  • ADMET
  • 安全信息
  • SDS
  • 制备方法与用途
  • 上下游信息
  • 反应信息
  • 文献信息
  • 表征谱图
  • 同类化合物
  • 相关功能分类
  • 相关结构分类

计算性质

  • 辛醇/水分配系数(LogP):
    -2.6
  • 重原子数:
    13
  • 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:
    99.4
  • 氢给体数:
    4
  • 氢受体数:
    6

上下游信息

  • 上游原料
    中文名称 英文名称 CAS号 化学式 分子量
  • 下游产品
    中文名称 英文名称 CAS号 化学式 分子量

反应信息

  • 作为反应物:
    描述:
    4-O-methyl-D-glucopyranose氢溴酸 、 lithium bromide 作用下, 以 甲苯 为溶剂, 以80%的产率得到5-(溴甲基)呋喃-2-甲醛
    参考文献:
    名称:
    从纤维素合成 5-溴甲基糠醛作为生物燃料的潜在中间体
    摘要:
    通过用 HBr 和 LiBr 处理并用甲苯连续萃取,纤维素可以转化为 5-溴甲基糠醛 (BMF),这是一种全新的生物燃料或生物燃料中间体,产率为 80%。从其他碳水化合物和稻草中,也可以高产地获得 BMF。研究了 BMF 的形成机制,结果表明该糠醛是在纤维素解聚过程中形成的,葡萄糖不是中间体。
    DOI:
    10.1002/ejoc.201001539
  • 作为产物:
    描述:
    4-O-Methyl-D-glucuronsaeure钾硼氢 、 Dowex-50 X-8 (H(1+)) resin 作用下, 以 为溶剂, 反应 20.0h, 生成 4-O-methyl-D-glucopyranose
    参考文献:
    名称:
    黄麻纤维中的木质素-木聚糖酯键合
    摘要:
    摘要用硼氢化钾水溶液处理黄麻纤维(I)可得到灰白色纤维(II)(含原始木质素的77%)和水溶性木质素-碳水化合物复合物(III)。在水解时,II和III都提供了新的糖,即4-O-甲基-d-葡萄糖,与与I相同的酸性和中性糖组分混合。从I和II制备的全纤维素的碱萃取得到粗制的d-木聚糖,其与氢氧化钡水溶液分馏,得到两个富集的d-木聚糖,每100个木糖基残基分别含有15.9和10.5单位的糖醛酸侧链。这些结果表明,I中d-木聚糖的酸性侧链的约34%通过酯键与木质素连接。
    DOI:
    10.1016/s0008-6215(00)85597-4
点击查看最新优质反应信息

文献信息

  • Glycosyl Bunte Salts: A Class of Intermediates for Sugar Chemistry
    作者:Yasuhiro Meguro、Masato Noguchi、Gefei Li、Shin-ichiro Shoda
    DOI:10.1021/acs.orglett.7b03400
    日期:2018.1.5
    thiosulfates have been discovered as a new class of synthetic intermediates in sugar chemistry, named “glycosyl Bunte salts” after 19th-century German chemist, Hans Bunte. The synthesis was achieved by direct condensation of unprotected sugars and sodium thiosulfate using a formamidine-type dehydrating agent in water–acetonitrile mixed solvent. The application of glycosyl Bunte salts is demonstrated with transformation
    S-糖基硫代硫酸盐已被发现是糖化学中的一类新型合成中间体,以19世纪德国化学家汉斯·邦特(Hans Bunte)的名字命名为“糖基邦特盐”。通过在水-乙腈混合溶剂中使用甲am型脱水剂将未保护的糖和硫代硫酸钠直接缩合来完成合成。通过向其他糖基化合物如1-硫糖,糖基二硫化物,1,6-脱水糖和O-糖苷的转化反应证明了糖基邦特盐的应用。
  • Chemical mapping of the active site of the glucoamylase of<i>Aspergillus niger</i>
    作者:Raymond U. Lemieux、Ulrike Spohr、Mimi Bach、Dale R. Cameron、Monica M. Palcic、Torben P. Frandsen、Bjarne B. Stoffer、Birte Svensson
    DOI:10.1139/v96-036
    日期:1996.3.1

    A recently developed technique for the probing of the combining sites of lectins and antibodies, to establish the structure of the epitope that is involved in the binding of an oligosaccharide, is used to study the binding of methyl α-isomaltoside by the enzyme glucoamylase. The procedure involved the determination of the effects on the kinetics of hydrolysis of both monodeoxygenation and mono-O-methylation at each of the seven hydroxyl groups in order to gain an estimate of the differential changes in the free energies of activation, ΔΔG. As expected, from previous publications, both deoxygenation and O-methylation of OH-4 (reducing unit), OH-4′, or OH-6′ strongly hindered hydrolysis, whereas the kinetics were virtually unaffected by either the substitutions at OH-2 or structural changes at C-1. The substitutions at OH-3 caused increases of 2.1 and 1.9 kcal/mol in the ΔΔG. In contrast, whereas deoxygenation of either OH-2′ or OH-3′ caused much smaller (0.96 and 0.52 kcal/mol) increases in ΔΔG, the mono-O-methylations resulted in severe steric hindrance to the formation of the activated complex. The relatively weak effects of deoxygenation suggest that the hydroxyl groups are replaced by water molecules and thereby participate in the binding by contributing effective complementarity. Methyl α-isomaltoside was docked into the combining site of the X-ray crystal structure at 2.4 Å resolution of the complex with the inhibitor acarbose. A fit free of steric interactions with the protein was found that has the methyl α-glucopyranoside unit in the normal4C1conformation and the other glucose unit approaching a half-chair conformation with the interunit fragment defined by the torsion angles [Formula: see text] The model provides a network of hydrogen bonds that appears to well represent the activated complex formed by the glucoamylase with both maltose and isomaltose since the structures appear to provide a sound rationale for both the specificity and catalysis provided by the enzyme. Key words: monodeoxy and mono-O-methyl derivatives of methyl α-isomaltoside, enzyme binding domain, functioning of glucoamylase, differential changes in free energy of activation, characteristics of hydrogen bonding networks.

    最近开发的一种技术用于探测凝集素和抗体的结合位点,以建立与寡糖结合中涉及的表位的结构,用于研究酶葡萄糖酶对甲基α-异麦芽糖的结合。该过程涉及确定对水解动力学的影响,包括每个七个羟基的单去氧和单-O-甲基化,以获得活化自由能的差异变化ΔΔG的估计。如预期的那样,根据先前的发表,OH-4(还原单元)、OH-4'或OH-6'的脱氧和O-甲基化强烈阻碍了水解,而OH-2的置换或C-1的结构变化几乎不影响动力学。OH-3的置换导致ΔΔG增加了2.1和1.9 kcal/mol。相比之下,OH-2'或OH-3'的脱氧导致ΔΔG增加较小(0.96和0.52 kcal/mol),而单-O-甲基化导致了对激活复合物形成的严重位阻。脱氧的相对较弱影响表明,羟基被水分子取代,从而通过提供有效的互补性参与结合。甲基α-异麦芽糖被对接到X射线晶体结构的结合位点,分辨率为2.4 Å的复合物与抑制剂阿卡波糖。找到了与蛋白质无位阻相互作用的适合,其中甲基α-葡萄糖吡喃糖单元处于正常的4C1构象,另一个葡萄糖单元接近半椅构象,其间单元片段由扭转角度定义[Formula: see text]该模型提供了一个氢键网络,似乎很好地代表了由葡萄糖酶与麦芽糖和异麦芽糖形成的激活复合物,因为这些结构似乎为酶提供的特异性和催化提供了合理的基础。关键词:甲基α-异麦芽糖的单去氧和单-O-甲基衍生物,酶结合结构域,葡萄糖酶的功能,活化自由能的差异变化,氢键网络的特性。
  • New mycotoxins from the scale insect fungus Aschersonia coffeae Henn. BCC 28712
    作者:Jittra Kornsakulkarn、Siriporn Saepua、Kitlada Srichomthong、Sumalee Supothina、Chawanee Thongpanchang
    DOI:10.1016/j.tet.2012.07.059
    日期:2012.10
    anthraquinones 7–9, together with nine known compounds; sterigmatocystin (10), demethylsterigmatocystin (11), dihydrodemethylsterigmatocystin (12), sterigmatin (13), austocystin F (14), averufin (15), aflatoxin B1, paeciloquinone A, and zeorin, were isolated from the scale insect fungus Aschersonia coffeae Henn. BCC 28712. The structures of these compounds were elucidated using NMR spectroscopic and
    九种新的霉菌毒素;5个呫1 - 5,hydroxanthone 6,和三个蒽醌7 - 9,连同9种已知化合物; 杂色曲霉素(10),demethylsterigmatocystin(11),dihydrodemethylsterigmatocystin(12),sterigmatin(13),austocystin F(14),averufin(15),黄曲霉毒素B1,paeciloquinone A,和zeorin,从该介壳虫真菌分离座壳孢coffeae Henn的。BCC28712。使用NMR光谱和MS光谱分析阐明了这些化合物的结构。化合物1– 3和6 – 9表现出细胞毒活性,而黄酮2和蒽醌8和9也表现出抗疟活性。
  • Chromanones and aryl glucoside analogs from the entomopathogenic fungus Aschersonia confluens BCC53152
    作者:Karoon Sadorn、Siriporn Saepua、Wikorn Punyain、Wacharee Saortep、Wilunda Choowong、Pranee Rachtawee、Pattama Pittayakhajonwut
    DOI:10.1016/j.fitote.2020.104606
    日期:2020.7
    (2S)-l-3-phenyllactic acid (15), papuline [or (2S)-l-3-phenyllactic acid methyl ester, 16], 2'-epi terpendole A (17), terpendoles C (18) and D (19), cholic acid, and zeorin were isolated from the entomopathogenic fungus Aschersonia confluens BCC53152. Their chemical structures were elucidated on the basis of NMR spectroscopic and mass spectrometric analyses. The absolute configurations were determined by
    六种新化合物[香气内酯A(1)和B(2),香气苯并二氢吡喃酮A(3),苯乙基4'-O-甲基葡糖苷(8),4'-O-甲基核苷(10)和4'-O-甲基torachrysone 8 -O-葡萄糖苷(11)]和一种天然新化合物[4'-O-甲基-β-d-苄基葡萄糖苷(9)]以及十四种已知化合物,包括全肽二肽A(5),B(7)和D (4),香柏树油A(6),丁子香苷(12),5-羟基-2,3-二甲基-7-甲氧基色酮(13),(S)-1-苯基-1,2-乙二醇(14),( 2S)-1-3-苯基乳酸(15),巴布林[或(2S)-1-3-苯基乳酸甲酯16],2'-上萜烯A(17),萜烯C(18)和D( 19),从昆虫病原真菌融合粉菌BCC53152中分离出胆酸和玉米醇溶蛋白。在NMR光谱和质谱分析的基础上阐明了它们的化学结构。通过使用来自NOESY相关性,化学方法,旋光度的证据以及ECD光谱数据与计算得出的E
  • Phenolic glucosides and chromane analogs from the insect fungus Conoideocrella krungchingensis BCC53666
    作者:Karoon Sadorn、Siriporn Saepua、Nattawut Boonyuen、Somjit Komwijit、Pranee Rachtawee、Pattama Pittayakhajonwut
    DOI:10.1016/j.tet.2019.05.007
    日期:2019.6
    eutypinic acid, 2,2-dimethyl-2H-1-chromene-6-carboxylic acid, (−)-luteoskyrin, (−)-4a-oxyluteoskyrin, chrysophanol, islandicin, catenarin, and (22E)-5α,8α-epidioxyergosta-6,22-dien-3β-ol were isolated from the insect fungus Conoideocrella krungchingensis BCC53666. (−)-Luteoskyrin exhibited a broad range of antimicrobial activity such as antimalarial (IC50 0.51 μg/mL), antitubercular (MIC 6.25 μg/mL),
    六种新的化合物,分别命名为香豆苷葡糖苷A- C和香豆苷色烷A-C,以及八种已知化合物,包括大戟松酸,2,2-二甲基-2 H -1-色烯-6-羧酸,(-)-luteoskyrin,( - ) -图4a-oxyluteoskyrin,大黄酚,islandicin,catenarin,和(22 ë)-5 α,8 α -epidioxyergosta-6,22二烯-3- β醇从昆虫真菌中分离Conoideocrella krungchingensis BCC53666。(-)-木犀草素具有广泛的抗菌活性,例如抗疟疾(IC 500.51μg/ mL),抗结核药(MIC 6.25μg/ mL),抗菌药(革兰氏阳性; MIC 0.39–1.56μg/ mL和革兰氏阴性; MIC 3.13–12.50μg/ mL)和抗真菌药(针对多种植物病原体; MIC 3.13–50.00μg/ mL)活性,而(−)-
查看更多