1-benzoxy-(4S,8S,12S,16S,20S)-4,8,12,16,20-pentamethylheptacosane | 1443233-24-6

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 异戊烯醇脂质
• 英文名称: 1-benzoxy-(4S,8S,12S,16S,20S)-4,8,12,16,20-pentamethylheptacosane
• 英文别名: [(4S,8S,12S,16S,20S)-4,8,12,16,20-pentamethylheptacosoxy]methylbenzene
• CAS: 1443233-24-6
• 化学式: C₃₉H₇₂O
• 分子量: 557.0
• InChiKey: NBZWBWQMEUSQLU-LQWITFIISA-N

计算性质

• 辛醇/水分配系数(LogP)：
  16.5
• 重原子数：
  40
• 可旋转键数：
  28
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.85
• 拓扑面积：
  9.2
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为反应物：
  描述：

  1-benzoxy-(4S,8S,12S,16S,20S)-4,8,12,16,20-pentamethylheptacosane 在 palladium 10% on activated carbon 、 氢气 作用下， 以 乙酸乙酯 为溶剂， 以93%的产率得到(4S,8S,12S,16S,20S)-4,8,12,16,20-pentamethyl-1-heptacosanol
  参考文献：
  名称：

  Highly Stereocontrolled Total Synthesis of β-d-Mannosyl Phosphomycoketide: A Natural Product from Mycobacterium tuberculosis

  摘要：

  beta-D-Mannosyl phosphomycoketide (C-32-MPM), a naturally occurring glycolipid found in the cell walls of Mycobacterium tuberculosis, acts as a potent antigen to activate T-cells upon presentation by CD1c protein. The lipid portion of C-32-MPM contains, a C-32-mycoketide, consisting of a saturated oligoisoprenoid chain with five chiral methyl branches. Here we develop several stereocontrolled approaches to assemble the oligoisoprenoid chain with high stereopurity (>96%) using Julia-Kocienski olefinations followed by diimide reduction. By careful choice of olefination sites, we could derive all chirality from a single commercial compound, methyl (2S)-3-hydroxy-2-methylpropionate (>99% ee). Our approach is the first highly stereocontrolled method to prepare C-32-MPM molecule with >96% stereopurity from a single >99% ee starting material. We anticipate that our methods will facilitate the highly stereocontrolled synthesis of a variety of other natural products containing chiral oligoisoprenoid-like chains, including vitamins, phytol, insect pheromones, and archaeal lipids.

  DOI：

  10.1021/jo4006602
• 作为产物：
  描述：

  (2R)-1-(tert-butyldiphenylsilyloxy)-3-cyano-2-methylpropane 在 sodium perborate tetrahydrate 、 四丁基氟化铵 、 氧气 、 sodium hydride 、 二异丁基氢化铝 、 戴斯-马丁氧化剂 、 copper(II) sulfate 、 间氯过氧苯甲酸 、 三苯基膦 、 lithium hexamethyldisilazane 、 肼 、 偶氮二甲酸二乙酯 作用下， 以 四氢呋喃 、 乙醇 、 二氯甲烷 、 水 为溶剂， 反应 21.17h， 生成 1-benzoxy-(4S,8S,12S,16S,20S)-4,8,12,16,20-pentamethylheptacosane
  参考文献：
  名称：

  Highly Stereocontrolled Total Synthesis of β-d-Mannosyl Phosphomycoketide: A Natural Product from Mycobacterium tuberculosis

  摘要：

  beta-D-Mannosyl phosphomycoketide (C-32-MPM), a naturally occurring glycolipid found in the cell walls of Mycobacterium tuberculosis, acts as a potent antigen to activate T-cells upon presentation by CD1c protein. The lipid portion of C-32-MPM contains, a C-32-mycoketide, consisting of a saturated oligoisoprenoid chain with five chiral methyl branches. Here we develop several stereocontrolled approaches to assemble the oligoisoprenoid chain with high stereopurity (>96%) using Julia-Kocienski olefinations followed by diimide reduction. By careful choice of olefination sites, we could derive all chirality from a single commercial compound, methyl (2S)-3-hydroxy-2-methylpropionate (>99% ee). Our approach is the first highly stereocontrolled method to prepare C-32-MPM molecule with >96% stereopurity from a single >99% ee starting material. We anticipate that our methods will facilitate the highly stereocontrolled synthesis of a variety of other natural products containing chiral oligoisoprenoid-like chains, including vitamins, phytol, insect pheromones, and archaeal lipids.

  DOI：

  10.1021/jo4006602

文献信息

• Highly Stereocontrolled Total Synthesis of β-<scp>d</scp>-Mannosyl Phosphomycoketide: A Natural Product from <i>Mycobacterium tuberculosis</i>
  作者：Nan-Sheng Li、Louise Scharf、Erin J. Adams、Joseph A. Piccirilli

  DOI：10.1021/jo4006602

  日期：2013.6.21

  beta-D-Mannosyl phosphomycoketide (C-32-MPM), a naturally occurring glycolipid found in the cell walls of Mycobacterium tuberculosis, acts as a potent antigen to activate T-cells upon presentation by CD1c protein. The lipid portion of C-32-MPM contains, a C-32-mycoketide, consisting of a saturated oligoisoprenoid chain with five chiral methyl branches. Here we develop several stereocontrolled approaches to assemble the oligoisoprenoid chain with high stereopurity (>96%) using Julia-Kocienski olefinations followed by diimide reduction. By careful choice of olefination sites, we could derive all chirality from a single commercial compound, methyl (2S)-3-hydroxy-2-methylpropionate (>99% ee). Our approach is the first highly stereocontrolled method to prepare C-32-MPM molecule with >96% stereopurity from a single >99% ee starting material. We anticipate that our methods will facilitate the highly stereocontrolled synthesis of a variety of other natural products containing chiral oligoisoprenoid-like chains, including vitamins, phytol, insect pheromones, and archaeal lipids.