(+)-trans-burseran | 23284-23-3

• 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: (+)-trans-burseran
• 英文别名: (+)-burseran；5-[[(3S,4S)-4-[(3,4,5-trimethoxyphenyl)methyl]oxolan-3-yl]methyl]-1,3-benzodioxole
• CAS: 23284-23-3
• 化学式: C₂₂H₂₆O₆
• 分子量: 386.445
• InChiKey: VJMJISPSGHVBBU-IAGOWNOFSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4
• 重原子数：
  28
• 可旋转键数：
  7
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.45
• 拓扑面积：
  55.4
• 氢给体数：
  0
• 氢受体数：
  6

反应信息

• 作为产物：
  描述：

  苯,1,2,3-三甲氧基-5-[(苯基硫代)甲基]- 在 W-2 Ra-Ni 正丁基锂 作用下， 以 乙醇 为溶剂， 反应 38.5h， 生成 (+)-trans-burseran
  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

• Synthesis of Lignans Based on a Borate‐mediated One‐pot Sequential Suzuki‐Miyaura Coupling of Cyclic Boranes
  作者：Ko Sato、Hiroshi Tanaka

  DOI：10.1002/chem.202100804

  日期：2021.6.25

  phytochemicals that possess a large spectrum of chemical structures and biological activities. Here the syntheses of lignans – anwulignan, burseran, dehydroxycubebin, ruburisandrin B, and sesamin – are achieved based on a borate-mediated one-pot sequential Suzuki-Miyaura coupling of cis- and trans-fused bicyclic boranes, which were prepared by diastereoselective cyclic hydroboration of exo-cyclic diene with

  木脂素是一组多酚类植物化学物质，具有广泛的化学结构和生物活性。在这里，木脂素的合成——anwulignan、burseran、dehydroxycubebin、ruburisandrin B 和芝麻素——是基于硼酸盐介导的顺式和反式一锅序贯 Suzuki-Miyaura 偶联实现的-稠合双环硼烷，分别通过环戊基-和甲苯基硼烷对环外二烯进行非对映选择性环状硼氢化反应制备。每个环状硼酸酯与各种芳基溴化物的一锅顺序 Suzuki-Miyaura 偶联通过用碳亲核试剂活化环状硼烷引发，提供具有不同芳族取代基的 2,3-二苄基丁烷衍生物。最后，从 Suzuki-Miyaura 偶联的产物中分几个步骤完成了天然存在的木脂素的合成。
• Stereoselective reactions. X. Total synthesis of optically pure antitumor lignan, burseran.
  作者：KIYOSHI TOMIOKA、TSUNEO ISHIGURO、KENJI KOGA

  DOI：10.1248/cpb.33.4333

  日期：——

  Optically pure trans- and cis-burseran (4, 10) were stereoselectively synthesized in an unequivocal manner. Comparison of their behaviors on gas chromatography indicated that naturally occurring antitumor lignan, burseran, is the trans-isomer.

  以明确的方式立体选择性地合成了光学纯的反式和顺式-burseran (4, 10)。它们在气相色谱上的行为比较表明天然存在的抗肿瘤木酚素，burseran，是反式异构体。
• A General Approach to the Asymmetric Synthesis of Lignans: (-)-Methyl Piperitol, (-)-Sesamin, (-)-Aschantin, (+)-Yatein, (+)-Dihydroclusin, (+)-Burseran, and (-)-Isostegane
  作者：Dieter Enders、Vivien Lausberg、Giuseppe Del Signore、Otto Mathias Berner

  DOI：10.1055/s-2002-20967

  日期：——

  enantioselective route was developed to access a great variety of lignans. The asymmetric synthesis of the 2,3-disubstituted γ-butyrolactones 9a-c could be improved in the case of aldol reactions by employing 2.2 equivalents of LiCl as an additive to provide, after purification, highly diastereo- and enantioenriched starting materials for the synthesis of the furofuran lignans (-)-methyl piperitol, (-)-sesamin

  开发了一种高效、非对映和对映选择性的途径来获得多种木脂素。2,3-二取代的 γ-丁内酯 9a-c 的不对称合成可以在醛醇反应的情况下通过使用 2.2 当量的 LiCl 作为添加剂来改进，以在纯化后提供高度非对映和对映富集的起始原料用于合成呋喃木脂素 (-)-甲基胡椒醇、(-)-芝麻素和 (-)-aschantin。此外，γ-丁内酯15被转化为二苄基丁内酯木脂素(+)-亚丁醇、二苄基丁二醇型(+)-二氢簇素、四氢呋喃型(+)-burseran和二苯并环辛二烯型(-)-异甜菊素。
• General conjugate-addition method for the synthesis of enantiomerically pure lignans. Total synthesis of (-)- and (+)-burseran, (-)-dehydroxycubebin, (-)-trichostin, (-)-cubebin, (-)-5''-methoxyhinokinin, and (-)-hinokinin
  作者：Nicola Rehnberg、Goeran Magnusson

  DOI：10.1021/jo00301a026

  日期：1990.7
• REHNBERG, NICOLA;MAGNUSSON, GORAN, J. ORG. CHEM., 55,(1990) N4, C. 4340-4349
  作者：REHNBERG, NICOLA、MAGNUSSON, GORAN

  DOI：——

  日期：——