betuletol acetate | 35589-27-6

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 黄酮类化合物
• 英文名称: betuletol acetate
• 英文别名: 3,5,7-triacetoxy-6-methoxy-2-(4-methoxy-phenyl)-chromen-4-one；[3,5-diacetyloxy-6-methoxy-2-(4-methoxyphenyl)-4-oxochromen-7-yl] acetate
• CAS: 35589-27-6
• 化学式: C₂₃H₂₀O₁₀
• 分子量: 456.406
• InChiKey: RKWGEDRZVTWPBW-UHFFFAOYSA-N

物化性质

• 沸点：
  579.5±50.0 °C(Predicted)
• 密度：
  1.40±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.6
• 重原子数：
  33
• 可旋转键数：
  9
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.22
• 拓扑面积：
  124
• 氢给体数：
  0
• 氢受体数：
  10

反应信息

• 作为产物：
  描述：

  1-(4-benzyloxy-2-hydroxy-3,6-dimethoxy-phenyl)-ethanone 在 palladium on activated charcoal 吡啶 、 氢氧化钾 、 三氯化铝 、 aluminum tri-bromide 、 硫酸 、 氢气 、 二甲基二环氧乙烷 、 potassium carbonate 、 溶剂黄146 、 potassium iodide 、 sodium iodide 作用下， 以 吡啶 、 甲醇 、 乙酸乙酯 、 N,N-二甲基甲酰胺 、 丙酮 、 乙腈 为溶剂， 反应 5.25h， 生成 betuletol acetate
  参考文献：
  名称：

  Studies of the Selective O-Alkylation and Dealkylation of Flavonoids. XXII. A Convenient Method for Synthesizing 3,5,7-Trihydroxy-6-methoxyflavones.

  摘要：

  研究了3, 4-二氧化6-甲氧基-2-异丙氧基苯乙酮的脱甲基反应，发现4-苄氧基-6-羟基-3-甲氧基-2-异丙氧基苯乙酮很容易由4-苄氧基-3, 6-二甲氧基得到4-苄氧基-6-羟基-3-甲氧基-2-异丙氧基苯乙酮-2-异丙氧基苯乙酮，用无水溴化铝-碘化钠在乙腈中选择性脱甲基。通过环化然后用二甲基二环氧乙烷氧化将苯乙酮转化为7-苄氧基-3-羟基-6-甲氧基-5-异丙氧基黄酮。用无水氯化铝通过相应的甲苯磺酸盐选择性裂解黄酮中的异丙氧基，得到7-苄氧基-3,5-二羟基-6-甲氧基黄酮，将其转化为所需的3,5,7-三羟基-6-甲氧基黄酮通过氢解作用。该工艺适合作为合成3,5,7-三羟基-6-甲氧基黄酮的通用方法，并合成了5种黄酮。我们还检查了 12 种 3,5,6,7-四氧化 4'-甲氧基黄酮的 13C-NMR 谱，并修改了天然黄酮的提议结构。

  DOI：

  10.1248/cpb.45.446

文献信息

• Isolation, identification, and biological evaluation of HIF-1-modulating compounds from Brazilian green propolis
  作者：Hisanori Hattori、Kensuke Okuda、Tetsuji Murase、Yuki Shigetsura、Kosuke Narise、Gregg L. Semenza、Hideko Nagasawa

  DOI：10.1016/j.bmc.2011.07.060

  日期：2011.9

  The tumor microenvironment is characterized by hypoxia, low-nutrient levels, and acidosis. A natural product chemistry-based approach was used to discover small molecules that modulate adaptive responses to a hypoxic microenvironment through the hypoxia-inducible factor (HIF)-1 signaling pathways. Five compounds, such as baccharin (3), beturetol (4), kaempferide (5), isosakuranetin (6), and drupanin (9), that modulate HIF-1-dependent luciferase activity were identified from Brazilian green propolis using reporter assay. Compounds 3, 9 and 5 reduced HIF-1-dependent luciferase activity. The cinnamic acid derivatives 3 and 9 significantly inhibited expression of the HIF-1 alpha protein and HIF-1 downstream target genes such as glucose transporter 1, hexokinase 2, and vascular endothelial growth factor A. They also exhibited significant anti-angiogenic effects in the chick chorioallantoic membrane (CAM) assay at doses of 300 ng/CAM. On the other hand, flavonoids 4 and 6 induced HIF-1-dependent luciferase activity and expression of HIF-1 target genes under hypoxia. The contents (g/100 g extract) of the HIF-1-modulating compounds in whole propolis ethanol extracts were also determined based on liquid chromatography-electrospray ionization mass spectrometry as 1.6 (3), 14.2 (4), 4.0 (5), 0.7 (6), and 0.7 (9), respectively. These small molecules screened from Brazilian green propolis may be useful as lead compounds for the development of novel therapies against ischemic cardiovascular disease and cancer based on their ability to induce or inhibit HIF-1 activity, respectively. (C) 2011 Elsevier Ltd. All rights reserved.