(4E,8E,12E,16E,20E)-22-hydroxy-4,8,12,16,20-pentamethyldocosa-4,8,12,16,20-pentaenal | 869878-12-6

• 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: (4E,8E,12E,16E,20E)-22-hydroxy-4,8,12,16,20-pentamethyldocosa-4,8,12,16,20-pentaenal
• CAS: 869878-12-6
• 化学式: C₂₇H₄₄O₂
• 分子量: 400.645
• InChiKey: QXWBVWJDGOAWSQ-JEFOKTNKSA-N

物化性质

• 沸点：
  522.3±38.0 °C(Predicted)
• 密度：
  0.918±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  7.81
• 重原子数：
  29.0
• 可旋转键数：
  16.0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.59
• 拓扑面积：
  37.3
• 氢给体数：
  1.0
• 氢受体数：
  2.0

反应信息

• 作为反应物：
  描述：

  (4E,8E,12E,16E,20E)-22-hydroxy-4,8,12,16,20-pentamethyldocosa-4,8,12,16,20-pentaenal 在 sodium tetrahydroborate 、 4-甲基苯磺酸吡啶 、 三乙胺 作用下， 以 甲醇 、 乙醚 、 二氯甲烷 、 二甲基亚砜 为溶剂， 反应 44.0h， 生成 (E,E,E,E,E)-5,9,13,17,21-pentamethyl-23-[(tetrahydro-2H-pyran-2-yl)oxy]tricosa-5,9,13,17,21-pentaenenitrile
  参考文献：
  名称：

  Novel Regio- and Stereoselective Cascade 6-endo-trig Cyclisations from Polyene Acyl Radical Intermediates Leading to Steroid-Like Pentacycles and Heptacycles

  摘要：

  In a quite remarkable regio- and stereoselective manner, each of the (all-E)-polyene selenoates 5a-c is shown to undergo cascade radical-mediated polycyclisations via consecutive 6-endo-trig reactions, leading to the corresponding all-trans, anti, tri-, penta- and heptacycles, i.e., 20, 23, and 25, in good yields. The configurations of these 'steroid-like' polycycles followed from detailed examination and correlation of chemical shift data in their C-13-NMR spectra.

  DOI：

  10.1002/1522-2675(20000906)83:9<2629::aid-hlca2629>3.0.co;2-w
• 作为产物：
  描述：

  3,7,11,15,19,23-hexamethyltetracosa-2,6,10,14,18,22-hexaen-1-ol 在 甲醇 、 4-二甲氨基吡啶 、 N-溴代丁二酰亚胺(NBS) 、 potassium carbonate 、 过碘酸 、 三乙胺 作用下， 以 四氢呋喃 、 二氯甲烷 、 水 为溶剂， 反应 30.0h， 生成 (4E,8E,12E,16E,20E)-22-hydroxy-4,8,12,16,20-pentamethyldocosa-4,8,12,16,20-pentaenal
  参考文献：
  名称：

  Novel Regio- and Stereoselective Cascade 6-endo-trig Cyclisations from Polyene Acyl Radical Intermediates Leading to Steroid-Like Pentacycles and Heptacycles

  摘要：

  In a quite remarkable regio- and stereoselective manner, each of the (all-E)-polyene selenoates 5a-c is shown to undergo cascade radical-mediated polycyclisations via consecutive 6-endo-trig reactions, leading to the corresponding all-trans, anti, tri-, penta- and heptacycles, i.e., 20, 23, and 25, in good yields. The configurations of these 'steroid-like' polycycles followed from detailed examination and correlation of chemical shift data in their C-13-NMR spectra.

  DOI：

  10.1002/1522-2675(20000906)83:9<2629::aid-hlca2629>3.0.co;2-w

文献信息

• A Strategy for Position-Selective Epoxidation of Polyprenols
  作者：Vijay Gnanadesikan、E. J. Corey

  DOI：10.1021/ja801899v

  日期：2008.6.1

  developed for the efficient site-selective epoxidation of poylolefinic isoprenoid alcohols, based on the use of an internal control element for intramolecular reaction. The approach is illustrated by application to a series of polyisoprenoid alcohols (polyprenols) at substrate concentration of 0.5 mM. With polyprenol substrates having the hydroxyl function at one terminus, the internal epoxidation can be directed

  基于使用内部控制元件进行分子内反应，已开发出一种有效的策略，用于聚烯烃类异戊二烯醇的有效位点选择性环氧化。该方法通过应用于一系列底物浓度为 0.5 mM 的聚异戊二烯醇（聚异戊二烯醇）来说明。对于在一个末端具有羟基官能团的聚异戊二烯醇底物，内部环氧化作用可针对聚异戊二烯醇的双键，该双键距末端羟基异戊二烯亚单元四或五处。
• Novel Regio- and Stereoselective Cascade 6-endo-trig Cyclisations from Polyene Acyl Radical Intermediates Leading to Steroid-Like Pentacycles and Heptacycles
  作者：Sandeep Handa、Prathap S. Nair、Gerald Pattenden

  DOI：10.1002/1522-2675(20000906)83:9<2629::aid-hlca2629>3.0.co;2-w

  日期：2000.9.6

  In a quite remarkable regio- and stereoselective manner, each of the (all-E)-polyene selenoates 5a-c is shown to undergo cascade radical-mediated polycyclisations via consecutive 6-endo-trig reactions, leading to the corresponding all-trans, anti, tri-, penta- and heptacycles, i.e., 20, 23, and 25, in good yields. The configurations of these 'steroid-like' polycycles followed from detailed examination and correlation of chemical shift data in their C-13-NMR spectra.