α-D-glucopyranosyl-(1→6)-1,2:3,4-di-O-isopropylidene-α-D-galactopyranose | 40592-75-4

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: α-D-glucopyranosyl-(1→6)-1,2:3,4-di-O-isopropylidene-α-D-galactopyranose
• CAS: 40592-75-4
• 化学式: C₁₈H₃₀O₁₁
• 分子量: 422.43
• InChiKey: INRMYZZMSZQZFR-XMSXNZMXSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -1.8
• 重原子数：
  29.0
• 可旋转键数：
  4.0
• 环数：
  4.0
• sp3杂化的碳原子比例：
  1.0
• 拓扑面积：
  145.53
• 氢给体数：
  4.0
• 氢受体数：
  11.0

反应信息

• 作为产物：
  描述：

  2,3,4,6-四乙酰氧基-alpha-D-吡喃葡萄糖溴化物 在 sodium methylate 、 potassium carbonate 、 mercury(II) nitrate 作用下， 以 甲醇 、 丙酮 、 甲苯 、 乙腈 为溶剂， 反应 1.0h， 生成 α-D-glucopyranosyl-(1→6)-1,2:3,4-di-O-isopropylidene-α-D-galactopyranose
  参考文献：
  名称：

  Chemistry of the glycosidic linkage. Exceptionally fast and efficient formation of glycosides by remote activation

  摘要：

  DOI：

  10.1016/s0008-6215(00)84882-x

文献信息

• Protecting Group Dependence of Stereochemical Outcome of Glycosylation of 2-<i>O</i>-(Thiophen-2-yl)methyl Ether Protected Glycosyl Donors
  作者：Andrew J. A. Watson、Stewart R. Alexander、Daniel J. Cox、Antony J. Fairbanks

  DOI：10.1002/ejoc.201600071

  日期：2016.3

  A series of glycosyl donors possessing a (thiophen-2-yl)methyl ether protecting group at position 2 were synthesised and the effect of the protecting group pattern of other hydroxyls on the stereochemical outcome of glycosylation was investigated. Studies revealed optimal α-selectivity for glycosylation using a fully armed tri-benzylated donor, whilst other protecting group patterns were significantly

  合成了一系列在 2 位具有 (噻吩-2-基) 甲基醚保护基团的糖基供体，并研究了其他羟基的保护基团模式对糖基化立体化学结果的影响。研究表明，使用完全武装的三苄基化供体对糖基化具有最佳 α 选择性，而其他保护基团模式的效果明显较差。对完全武装和完全解除武装的供体的低温 NMR 研究揭示了环化锍离子中间体的中间体。开发了允许选择性地或与苄基醚一起去除(噻吩-2-基)甲基醚保护基团的反应条件。
• Glycosylation Using Unprotected Alkynyl Donors
  作者：Sreeman K. Mamidyala、M.G. Finn

  DOI：10.1021/jo901857x

  日期：2009.11.6

  Gold(III) activation of unprotected propargyl glycosyl donors has been shown to be effective for the synthesis of saccharides. Terminal propargyl glycosides of glucose, galactose, and mannose required heating at reflux in acetonitrile with 5% AuCl(3) for reaction with various primary alcohol acceptors, the latter used in 10-fold molar excess relative to donor. Donors containing the 2-butynyl group were more reactive, giving good yields of glycoside products at lower temperatures Secondary alcohols could also be used but with diminished efficiency. The propargylic family of donors is especially convenient because they can be easily prepared on large scale by Fischer glycosylation and stored indefinitely before chemoselective activation by the catalyst.
• Direct Glycosylation of Bioactive Small Molecules with Glycosyl Iodide and Strained Olefin as Acid Scavenger
  作者：Xiangying Gu、Lin Chen、Xin Wang、Xiao Liu、Qidong You、Wenwei Xi、Li Gao、Guohua Chen、Yue-Lei Chen、Bing Xiong、Jingkang Shen

  DOI：10.1021/jo402551x

  日期：2014.2.7

  A new strategy for diversity-oriented direct glycosylation of bioactive small molecules was developed. This reaction features (-)-beta-pinene as acid scavenger and work with glycosyl iodides under mild conditions. With the aid of RP-HPLC and chiral SFC separation techniques, the new direct glycosylation proved effective at gram scale on bioactive small molecules including AZD6244, podophyllotoxin, paclitaxel, and docetaxel. Interesting glycoside derivatives were efficiently created with good yields and 1,2-cis selectivity.