1,2,3,4-tetra-O-acetyl-6-O-benzyl-α-D-glucopyranose | 108257-52-9

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: 1,2,3,4-tetra-O-acetyl-6-O-benzyl-α-D-glucopyranose
• 英文别名: [(2R,3R,4S,5R,6R)-4,5,6-triacetyloxy-2-(phenylmethoxymethyl)oxan-3-yl] acetate
• CAS: 108257-52-9
• 化学式: C₂₁H₂₆O₁₀
• 分子量: 438.431
• InChiKey: AQOFYCKDAMGIKL-ADAARDCZSA-N

物化性质

• 沸点：
  499.4±45.0 °C(Predicted)
• 密度：
  1.27±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.1
• 重原子数：
  31
• 可旋转键数：
  12
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.52
• 拓扑面积：
  124
• 氢给体数：
  0
• 氢受体数：
  10

反应信息

• 作为产物：
  描述：

  (2R,3R,4S,5S,6R)-6-(trityloxymethyl)oxane-2,3,4,5-tetrol 在 吡啶 、 溶剂黄146 、 silver(l) oxide 作用下， 以 苯 为溶剂， 反应 1.83h， 生成 1,2,3,4-tetra-O-acetyl-6-O-benzyl-α-D-glucopyranose
  参考文献：
  名称：

  Utamura, Toshiko; Kuromatsu, Keiko; Suwa, Kiyoko, Chemical and pharmaceutical bulletin, 1986, vol. 34, p. 2341 - 2353

  摘要：

  DOI：

文献信息

• Discriminating non-ylidic carbon-sulfur bond cleavages of sulfonium ylides for alkylation and arylation reactions
  作者：Jing Fang、Ting Li、Xiang Ma、Jiuchang Sun、Lei Cai、Qi Chen、Zhiwen Liao、Lingkui Meng、Jing Zeng、Qian Wan

  DOI：10.1016/j.cclet.2021.06.069

  日期：2022.1

  The disparate reaction pattern allowed the separate activation of non-ylidic S-alkyl and S-aryl bond. Under acidic conditions, sulfonium ylides serve as alkyl cation precursors which facilitate the alkylations. While under alkaline conditions, cleavage of non-ylidic S-aryl bond produces O-arylated compounds efficiently. The robustness of the protocols were established by the excellent compatibility of

  描述了一种在无过渡金属条件下参与烷基化和芳基化的锍叶立德。不同的反应模式允许单独激活非叶立基S-烷基和S-芳基键。在酸性条件下，锍叶立德用作促进烷基化的烷基阳离子前体。而在碱性条件下，非叶立基 S-芳基键的断裂可有效地产生O-芳基化化合物。协议的稳健性是由包括碳水化合物在内的各种底物的出色兼容性建立的。
• A practical approach to regioselective O-benzylation of primary positions of polyols
  作者：Maddalena Giordano、Alfonso Iadonisi

  DOI：10.1016/j.tetlet.2013.01.023

  日期：2013.3

  Exposure of saccharide polyols to a moderate excess of benzyl bromide and DIPEA at 90 degrees C results in the regioselective O-benzylation of primary positions in moderate to good yields. The reactions can be performed without inert atmosphere and provide synthetically useful yields within a few hours. (c) 2013 Elsevier Ltd. All rights reserved.
• Rapid Preparation of Variously Protected Glycals Using Titanium(III)
  作者：Roxanne P. Spencer、Cullen L. Cavallaro、Jeffrey Schwartz

  DOI：10.1021/jo982447k

  日期：1999.5.1

  Glycosyl chlorides and bromides can be rapidly converted to glycals in high yield by reaction with (Cp2Ti[III]Cl)(2). This reagent tolerates a wide range of common carbohydrate protecting groups, including silyl ethers, acetals, and esters; the methodology provides a general route for the preparation of glycals substituted with both acid- and base-labile functionality. A reaction mechanism is proposed that is based on heteroatom abstraction to give an intermediate glycosyl radical. This radical reacts with a second equivalent of Ti(III) to yield a glycosyltitanium(IV) species. P-Heteroatom elimination from the glycosyltitanium(IV) complex gives the glycal.