19β,28-epoxy-2,2-difluoro-18α-oleanan-3β-ol | 857859-69-9

• 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: 19β,28-epoxy-2,2-difluoro-18α-oleanan-3β-ol
• 英文别名: difluoroallobetulin；(1R,4R,5R,8R,10R,13R,14R,17R,18R,19R)-11,11-difluoro-4,5,9,9,13,20,20-heptamethyl-24-oxahexacyclo[17.3.2.01,18.04,17.05,14.08,13]tetracosan-10-ol
• CAS: 857859-69-9
• 化学式: C₃₀H₄₈F₂O₂
• 分子量: 478.707
• InChiKey: VVFRNJXYAVAWKL-HTLKMQPDSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  8.5
• 重原子数：
  34
• 可旋转键数：
  0
• 环数：
  6.0
• sp3杂化的碳原子比例：
  1.0
• 拓扑面积：
  29.5
• 氢给体数：
  1
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  19β,28-epoxy-2,2-difluoro-18α-oleanan-3β-ol 在 4,4'-二氨基二苯乙烯-2,2'-二磺酸 作用下， 以 二氯甲烷 为溶剂， 以61%的产率得到
  参考文献：
  名称：

  用 DAST 氟化桦木碱和其他三萜类化合物

  摘要：

  Betulinines 是具有抗肿瘤活性的羽扇豆烷、des-E-羽扇豆烷、18-羽扇豆烯、20(29)-羽扇豆烯和 18α-齐墩果烷衍生物。我们使用二乙基氨基三氟化硫 (DAST) 作为氟化剂检查了这些衍生物的氟化。我们制备了 19β,28-epoxy-2,2-difluoro-18α-oleanan-3-one (3c), 19β,28-epoxy-2,2-di-fluoro-18α-oleanan-3β-ol (4a), 3β-acetoxy-30-fluorolup-20(29)-ene-28-oate (6b)、3β,28-diacetoxy-22-oxo-21,21-difluorolup-18-ene (8b) 和其他几种氟化桦木脑用于迄今为止未能证明显着抗癌活性的体外细胞毒性试验。

  DOI：

  10.1055/s-2005-861861
• 作为产物：
  描述：

  白桦脂醇 在 aluminum oxide 、 sodium tetrahydroborate 、 Montmorillonite K₁₀ 、 硫酸 、 间氯过氧苯甲酸 、 4,4'-二氨基二苯乙烯-2,2'-二磺酸 、 pyridinium chlorochromate 作用下， 以 四氢呋喃 、 1,4-二氧六环 、 甲醇 、 二氯甲烷 、 氯仿 为溶剂， 反应 98.0h， 生成 19β,28-epoxy-2,2-difluoro-18α-oleanan-3β-ol
  参考文献：
  名称：

  用 DAST 氟化桦木碱和其他三萜类化合物

  摘要：

  Betulinines 是具有抗肿瘤活性的羽扇豆烷、des-E-羽扇豆烷、18-羽扇豆烯、20(29)-羽扇豆烯和 18α-齐墩果烷衍生物。我们使用二乙基氨基三氟化硫 (DAST) 作为氟化剂检查了这些衍生物的氟化。我们制备了 19β,28-epoxy-2,2-difluoro-18α-oleanan-3-one (3c), 19β,28-epoxy-2,2-di-fluoro-18α-oleanan-3β-ol (4a), 3β-acetoxy-30-fluorolup-20(29)-ene-28-oate (6b)、3β,28-diacetoxy-22-oxo-21,21-difluorolup-18-ene (8b) 和其他几种氟化桦木脑用于迄今为止未能证明显着抗癌活性的体外细胞毒性试验。

  DOI：

  10.1055/s-2005-861861

文献信息

• Synthesis of cytotoxic 2,2-difluoroderivatives of dihydrobetulinic acid and allobetulin and study of their impact on cancer cells
  作者：Lucie Borkova、Lucie Jasikova、Jiri Rehulka、Katerina Frisonsova、Milan Urban、Ivo Frydrych、Igor Popa、Marian Hajduch、Niall J. Dickinson、Martin Vlk、Petr Dzubak、Jan Sarek

  DOI：10.1016/j.ejmech.2015.03.068

  日期：2015.5

  In this article, we describe the preparation and cytotoxic properties of a small focused library of lupane and 18 alpha-oleanane triterpenoids that contain a combination of two structural motifs known to enhance the biological activities. First, we introduced two fluorine atoms to position 2 of the skeleton. Second, we synthesized a set of hemiester prodrugs, which were intended to increase the solubility and activity. Starting from betulin, we obtained two hydroxyketones (derivatives of dihydrobetulinic acid and allobetulin) and their fluorination using DAST provided 2,2-difluoro-3-oxo-compounds as the main products. Then the 3-oxo group in each derivative was reduced by NaBH4 to obtain 3 beta-hydroxy compounds suitable for modifying by various hemiesters. We prepared 21 compounds, 11 of them new, their cytotoxicity was tested on T lymphoblastic leukemia CCRF-CEM cells first and the most active derivatives were selected for screening on another six tumor and two non-tumor cell lines. All of them showed selectivity against cancer lines with therapeutic index between 2 and 8. All hemiesters had activity in the same range as the free hydroxyl derivatives and they would be suitable prodrugs for future in vivo experiments. Interestingly, all hemiesters of 2,2-difluorodihydrobetulonic acid had higher activity against p53 knock-out p53-/- cancer cell line than against the non-mutated analog. In active derivatives, the cell cycle was analyzed by flow cytometry and several compounds slowed down cell cycle progression through G0/G1 or S-phase. (C) 2015 Elsevier Masson SAS. All rights reserved.
• Fluorination of Betulinines and Other Triterpenoids with DAST
  作者：Jan Sarek、David Biedermann、Jiri Klinot、Marian Hajduch、Petr Dzubak

  DOI：10.1055/s-2005-861861

  日期：——

  examined fluorination of these derivatives using diethylaminosulfur trifluoride (DAST) as fluorinating agent. We prepared 19β,28-epoxy-2,2-difluoro-18α-oleanan-3-one (3c), 19β,28-epoxy-2,2-di-fluoro-18α-oleanan-3β-ol (4a), methyl 3β-acetoxy-30-fluorolup-20(29)-ene-28-oate (6b), 3β,28-diacetoxy-22-oxo-21,21-difluorolup-18-ene (8b) and several other fluorinated betulinines for in vitro cytotoxicity tests

  Betulinines 是具有抗肿瘤活性的羽扇豆烷、des-E-羽扇豆烷、18-羽扇豆烯、20(29)-羽扇豆烯和 18α-齐墩果烷衍生物。我们使用二乙基氨基三氟化硫 (DAST) 作为氟化剂检查了这些衍生物的氟化。我们制备了 19β,28-epoxy-2,2-difluoro-18α-oleanan-3-one (3c), 19β,28-epoxy-2,2-di-fluoro-18α-oleanan-3β-ol (4a), 3β-acetoxy-30-fluorolup-20(29)-ene-28-oate (6b)、3β,28-diacetoxy-22-oxo-21,21-difluorolup-18-ene (8b) 和其他几种氟化桦木脑用于迄今为止未能证明显着抗癌活性的体外细胞毒性试验。