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methyl 3,6-di-O-benzyl-β-D-galactopyranoside | 67381-30-0

中文名称
——
中文别名
——
英文名称
methyl 3,6-di-O-benzyl-β-D-galactopyranoside
英文别名
(2R,3R,4S,5S,6R)-2-methoxy-4-phenylmethoxy-6-(phenylmethoxymethyl)oxane-3,5-diol
methyl 3,6-di-O-benzyl-β-D-galactopyranoside化学式
CAS
67381-30-0
化学式
C21H26O6
mdl
——
分子量
374.434
InChiKey
RLGKEERGCGWMKK-VIYGXFRKSA-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):
    1.5
  • 重原子数:
    27
  • 可旋转键数:
    8
  • 环数:
    3.0
  • sp3杂化的碳原子比例:
    0.43
  • 拓扑面积:
    77.4
  • 氢给体数:
    2
  • 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:
    methyl 3,6-di-O-benzyl-β-D-galactopyranoside吡啶氢氧化钾 作用下, 反应 3.0h, 生成 methyl 2-O-acetyl-3,4,6-tri-O-benzyl-β-D-galactopyranoside
    参考文献:
    名称:
    甲基 α- 和 β-D-吡喃半乳糖苷的部分苄基化
    摘要:
    甲基 α-D-吡喃半乳糖苷与苄基氯和 LiOH 选择性地部分苄基化得到 2,3,6-三苄基醚,而使用 KOH 或 RbOH 得到 2,4,6-异构体作为主要产物。无论使用何种碱,甲基 β-D-吡喃半乳糖苷主要提供 3,4,6-三苄基醚。
    DOI:
    10.1246/bcsj.56.2849
  • 作为产物:
    参考文献:
    名称:
    有机锡催化的二醇和多元醇的区域选择性单烷基和多烷基化及其在增值碳水化合物中间体合成中的应用
    摘要:
    催化量的二氯化二丁基锡用于发展二醇的区域选择性烷基化和多元醇的多重烷基化。包括烯丙基,炔基和长链烷基在内的烷基已成功引入到碳水化合物和非糖底物的一个或两个羟基上。在大多数情况下,可获得优异的分离产率。炔化的碳水化合物可用于通过点击反应以高效率合成寡糖模拟物。具有长链烷基的碳水化合物可用作表面活性剂,本研究中的实验进一步证明了这一点。
    DOI:
    10.1016/j.tet.2016.04.076
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文献信息

  • Regio/site-selective alkylation of substrates containing a <i>cis</i>-, 1,2- or 1,3-diol with ferric chloride and dipivaloylmethane as the catalytic system
    作者:Jian Lv、Yu Liu、Jia-Jia Zhu、Dapeng Zou、Hai Dong
    DOI:10.1039/c9gc04126e
    日期:——
    In this study, we reported the regio/site-selective alkylation of substrates containing a cis-, 1,2- or 1,3-diol with FeCl3 as a key catalyst. A catalytic system consisting of FeCl3 (0.01–0.1 equiv.) and dipivaloylmethane (FeCl3/dipivaloylmethane = 1/2) was used to catalyze the alkylation in the presence of a base. The produced selectivities and isolated yields were similar to those obtained by methods
    在这项研究中,我们报道了含有顺式-,1,2-或1,3-二醇的底物的区域/位置选择性烷基化,其中FeCl 3为关键催化剂。由FeCl 3(0.01-0.1当量)和二戊酰基甲烷(FeCl 3 / dipivaloylmethane = 1/2)组成的催化体系用于在存在碱的情况下催化烷基化。在大多数情况下,所产生的选择性和分离的产率与使用相同量的FeL 3(L =酰基丙酮配体)作为催化剂的方法所获得的相似。先前报道的用于烷基化的FeL 3催化剂不可商购,并且必须在使用前合成。相反,FeCl 3苯二甲酰甲烷(Hdipm)和二甲戊酰甲烷(Hdipm)是实验室中非常普遍且廉价的无毒试剂,因此使该方法更加绿色且易于操作。机理研究首次证实,FeCl 3最初在乙腈中存在碱的情况下与两当量的Hdipm反应形成[Fe(dipm)3 ],然后在[[]之间形成五或六元环中间体。 Fe(dipm)3 ]和底物的两个羟
  • Regioselective alkylation of carbohydrates and diols: a cheaper iron catalyst, new applications and mechanism
    作者:Bo Ren、Ningning Yan、Lu Gan
    DOI:10.1039/c7ra10220h
    日期:——
    an extension of our previous research on the regioselective protection of carbohydrates and diols, we developed an iron catalyst, Fe(dibm)3 (dibm = diisobutyrylmethane), which has an unusually broad catalytic scope in the selective monoalkylation of diols and carbohydrates. However, even though the iron reagent is green, the cost to prepare the catalyst is high, which is not conducive to large-scale
    作为我们先前对碳水化合物和二醇的区域选择性保护的研究的扩展,我们开发了一种铁催化剂Fe(dibm)3(dibm =二异丁酰甲烷),该催化剂在二醇和碳水化合物的选择性单烷基化中具有异常广泛的催化范围。然而,即使铁试剂是绿色的,制备催化剂的成本也很高,这不利于大规模应用,并且催化反应的机理仍不完全清楚。在这项研究中,我们开发了一种便宜得多的铁催化剂Fe(dipm)3(dipm =二氢戊酰甲烷),在碳水化合物和二醇的区域选择性烷基化中具有相似的催化效率。还研究了铁催化的选择性烷基化反应的机理,并提出了一种新的详细的铁催化反应机理。
  • Silicon-29 NMR spectroscopy in carbohydrate chemistry: Galactose derivatives
    作者:D. J. Gale、N. A. Evans
    DOI:10.1002/omr.1270210910
    日期:1983.9
    Abstract29Si NMR spectra of the O‐trimethylsilyl (OTMS) derivatives of various methyl α‐ and β‐D‐galactopyranosides have been recorded. The effect of changes in the anomeric configuration provides a means of assigning the resonance of the 2‐OTMS substituent. Whereas the signal of the OTMS group attached at the 6‐position can be assigned readily, those of the OTMS group at the 3‐ or 4‐position cannot be assigned unequivocally.
  • Halide promoted organotin-mediated carbohydrate benzylation: mechanism and application
    作者:Yixuan Zhou、Jinyang Li、Yingjie Zhan、Zhichao Pei、Hai Dong
    DOI:10.1016/j.tet.2013.02.024
    日期:2013.4
    In the present study, the mechanistic origin of the promoted organotin-mediated carbohydrate benzylation by halides was explored by the comparison of the activation ability of halides on benzylation of methyl beta-D-galactoside. It was demonstrated that the improvement of benzylation in terms of speed, yield and general convenience in the presence of halides was due to the formation of an activated oxide species by the coordination of halide anions to the tetracoordinate tin atoms. The halide, being able to form a stronger bond with tin, showed stronger activation ability. The catalytic amount of bromide should be preferentially chosen as an activation additive in the reaction with consideration of economy, convenience and moderate activation ability. The results were further applied to mono- and multibenzylation of additional carbohydrate structures. A range of prototype carbohydrate structures were efficiently prepared with the guidance of the principle. In light of the previous studies and the present experimental results, the general rules for organotin-mediated benzylation of carbohydrates have been summarized. (C) 2013 Elsevier Ltd. All rights reserved.
  • Qin, Huiping; Grindley, T. Bruce, Journal of Carbohydrate Chemistry, 1994, vol. 13, # 3, p. 475 - 490
    作者:Qin, Huiping、Grindley, T. Bruce
    DOI:——
    日期:——
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