ethyl (2E,4R,5S)-5-azido-4-benzyloxy-6-(2,3,4,6-tetra-O-benzyl-β-D-galactopyranosyloxy)-2-hexenoate | 956038-84-9

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 脂肪酰基
• 英文名称: ethyl (2E,4R,5S)-5-azido-4-benzyloxy-6-(2,3,4,6-tetra-O-benzyl-β-D-galactopyranosyloxy)-2-hexenoate
• 英文别名: ethyl (E,4R,5S)-5-azido-4-phenylmethoxy-6-[(2R,3R,4S,5S,6R)-3,4,5-tris(phenylmethoxy)-6-(phenylmethoxymethyl)oxan-2-yl]oxyhex-2-enoate
• CAS: 956038-84-9
• 化学式: C₄₉H₅₃N₃O₉
• 分子量: 827.975
• InChiKey: YSHZMSBDHVUBDG-MSHODYEBSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  8.4
• 重原子数：
  61
• 可旋转键数：
  25
• 环数：
  6.0
• sp3杂化的碳原子比例：
  0.33
• 拓扑面积：
  105
• 氢给体数：
  0
• 氢受体数：
  11

反应信息

• 作为反应物：
  描述：

  ethyl (2E,4R,5S)-5-azido-4-benzyloxy-6-(2,3,4,6-tetra-O-benzyl-β-D-galactopyranosyloxy)-2-hexenoate 在 三氟化硼乙醚 、 二异丁基氢化铝 作用下， 以 正己烷 、 二氯甲烷 为溶剂， 反应 2.0h， 以70%的产率得到(2S,3R,4E)-1-(2,3,4,6-tetra-O-benzyl-β-D-galactopyranosyloxy)-2-azido-3-benzyloxyhex-4-en-6-ol
  参考文献：
  名称：

  A General and Stereoselective Route to α- or β-Galactosphingolipids via a Common Four-Carbon Building Block

  摘要：

  [GRAPHICS]A general synthetic strategy toward alpha- or beta-galactosylceramides and their analogues from 3-azido-2-O-benzyl-1-O-(4-methoxybenzyl)butane- 1,2,4-triol is described. The key steps for the installation of the main lipid chain are either a diasteroselective alkynylation reaction yielding the 4R stereocenter of phytosphingosine or a Wittig olefination generating the trans double bond of sphingosine. The methodology allows the preparation of different glycolipids with variations in the structure of the sphingoid base. In particular, three alpha-GalCer-related compounds have been synthesized and evaluated for their ability to activate CD1d-restricted T-cells.

  DOI：

  10.1021/jo070849z
• 作为产物：
  描述：

  (2R,3R)-3-O-benzyl-4-O-(4-methoxybenzyl)-1-O-(thexyldimethylsilyl)butane-1,2,3,4-tetrol 在 吡啶 、 sodium azide 、 草酰氯 、 四丁基氟化铵 、 三乙基硅基三氟甲磺酸酯 、 sodium methylate 、 sodium hydride 、 二甲基亚砜 、 三乙胺 、 2,3-二氯-5,6-二氰基-1,4-苯醌 作用下， 以 四氢呋喃 、 甲醇 、 二氯甲烷 、 水 、 N,N-二甲基甲酰胺 、 甲苯 为溶剂， 反应 62.5h， 生成 ethyl (2E,4R,5S)-5-azido-4-benzyloxy-6-(2,3,4,6-tetra-O-benzyl-β-D-galactopyranosyloxy)-2-hexenoate
  参考文献：
  名称：

  A General and Stereoselective Route to α- or β-Galactosphingolipids via a Common Four-Carbon Building Block

  摘要：

  [GRAPHICS]A general synthetic strategy toward alpha- or beta-galactosylceramides and their analogues from 3-azido-2-O-benzyl-1-O-(4-methoxybenzyl)butane- 1,2,4-triol is described. The key steps for the installation of the main lipid chain are either a diasteroselective alkynylation reaction yielding the 4R stereocenter of phytosphingosine or a Wittig olefination generating the trans double bond of sphingosine. The methodology allows the preparation of different glycolipids with variations in the structure of the sphingoid base. In particular, three alpha-GalCer-related compounds have been synthesized and evaluated for their ability to activate CD1d-restricted T-cells.

  DOI：

  10.1021/jo070849z

文献信息

• A General and Stereoselective Route to α- or β-Galactosphingolipids via a Common Four-Carbon Building Block
  作者：Pamela Matto、Emilia Modica、Laura Franchini、Federica Facciotti、Lucia Mori、Gennaro De Libero、Grazia Lombardi、Silvia Fallarini、Luigi Panza、Federica Compostella、Fiamma Ronchetti

  DOI：10.1021/jo070849z

  日期：2007.9.1

  [GRAPHICS]A general synthetic strategy toward alpha- or beta-galactosylceramides and their analogues from 3-azido-2-O-benzyl-1-O-(4-methoxybenzyl)butane- 1,2,4-triol is described. The key steps for the installation of the main lipid chain are either a diasteroselective alkynylation reaction yielding the 4R stereocenter of phytosphingosine or a Wittig olefination generating the trans double bond of sphingosine. The methodology allows the preparation of different glycolipids with variations in the structure of the sphingoid base. In particular, three alpha-GalCer-related compounds have been synthesized and evaluated for their ability to activate CD1d-restricted T-cells.