3,4,3',4'-tetramethoxy-9,9'-epoxylignan | 10352-26-8

• 分子结构分类: 有机化合物 - 木脂素、新木脂素和相关化合物 - 呋喃类木脂素
• 英文名称: 3,4,3',4'-tetramethoxy-9,9'-epoxylignan
• 英文别名: (+)-Brassilignan；(S)-trans-3,4-Diveratryl-tetrahydro-furan；Brassilignan；(3S,4S)-3,4-bis[(3,4-dimethoxyphenyl)methyl]oxolane
• CAS: 10352-26-8
• 化学式: C₂₂H₂₈O₅
• 分子量: 372.461
• InChiKey: DMDLIQAXFOCGBP-QZTJIDSGSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.2
• 重原子数：
  27
• 可旋转键数：
  8
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.45
• 拓扑面积：
  46.2
• 氢给体数：
  0
• 氢受体数：
  5

反应信息

• 作为产物：
  描述：

  (3RS,4RS)-cis-3-Hydroxy-4-(3,4-dimethoxybenzyl)tetrahydrofuran 在 W-2 Ra-Ni 正丁基锂 、 甲基锂 作用下， 以 乙醇 为溶剂， 反应 42.0h， 生成 3,4,3',4'-tetramethoxy-9,9'-epoxylignan
  参考文献：
  名称：

  Enantiocontrolled synthesis of burseran, brassilignan, dehydroxycubebin, and other tetrahydrofuran lignans in both enantiomeric forms. Application of intermolecular nitrile oxide cycloadditions and lipase-mediated kinetic resolutions

  摘要：

  Several natural and unnatural tetrahydrofuran lignans have been synthesized by a convergent approach. Our methodology utilizes a nitrile oxide cycloaddition to dihydrofuran 8 and an enzymatic resolution of alcohols 11 by lipase PS. The lipase-mediated kinetic resolution of alcohols 11 furnished both enantiomers of the lignan precursors 12 and 14 in high optical purity (>99% ee). This is followed by a S(N)2 displacement of tosylates 15 and 18 by alpha-lithiobenzyl phenyl sulfides. In this manner, both enantiomers of 3,4-dibenzyltetrahydrofuran (17a, 20a), 3,4-bis(3-methoxybenzyl)-tetrahydrofuran (17b, 20b), brassilignan (17c, 20c), dehydroxycubebin (17d, 20d), and burseran (17e, 20e) were synthesized in overall yields of 6-16%.

  DOI：

  10.1021/jo00060a037

文献信息

• Row et al., Tetrahedron, 1966, vol. 22, p. 2899,2907
  作者：Row et al.

  DOI：——

  日期：——
• Preparation and anti-HIV activities of retrojusticidin B analogs and azalignans
  作者：Kadali S Sagar、Chia-Chuan Chang、Wei-Kung Wang、Jung-Yaw Lin、Shoei-Sheng Lee

  DOI：10.1016/j.bmc.2004.05.036

  日期：2004.8

  Ten lignans (2-11) and a series of azalignans including 1-aryl-pyrronaphthalenes 20-24 and 3-N-alkylaminomethyl-1-arylnaphthalenes 25-28, structurally related to two HIV reverse transcriptase inhibitors, retrojusticidin B and phyllamyricin A, were prepared from phyllanthin (1) for evaluation of anti-HIV activities. Anti-HIV activity of these compounds on a R5 pseudotype virus, ConB/pNL43E-L+, in the U87-CD4-CCR5 cells has been measured. Compounds 5, 22, 23, and 28 showed good anti-HIV activity with IC50 value of 0.25, 1.07, 0.01, 0.32 mug/mL, respectively. (C) 2004 Elsevier Ltd. All rights reserved.
• Enantiocontrolled synthesis of burseran, brassilignan, dehydroxycubebin, and other tetrahydrofuran lignans in both enantiomeric forms. Application of intermolecular nitrile oxide cycloadditions and lipase-mediated kinetic resolutions
  作者：Janet A. Gaboury、Mukund P. Sibi

  DOI：10.1021/jo00060a037

  日期：1993.4

  Several natural and unnatural tetrahydrofuran lignans have been synthesized by a convergent approach. Our methodology utilizes a nitrile oxide cycloaddition to dihydrofuran 8 and an enzymatic resolution of alcohols 11 by lipase PS. The lipase-mediated kinetic resolution of alcohols 11 furnished both enantiomers of the lignan precursors 12 and 14 in high optical purity (>99% ee). This is followed by a S(N)2 displacement of tosylates 15 and 18 by alpha-lithiobenzyl phenyl sulfides. In this manner, both enantiomers of 3,4-dibenzyltetrahydrofuran (17a, 20a), 3,4-bis(3-methoxybenzyl)-tetrahydrofuran (17b, 20b), brassilignan (17c, 20c), dehydroxycubebin (17d, 20d), and burseran (17e, 20e) were synthesized in overall yields of 6-16%.