Thunberginol G | 80394-88-3

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 苯并吡喃
• 英文名称: Thunberginol G
• 英文别名: 3-(3,4-dihydroxyphenyl)-8-hydroxy-1H-isochromen-1-one；(±)-thunberginol G；thunberginol；thunberginol A；dl-3,4-dihydro-3-(3,4-dihydroxyphenyl)-8-hydroxyisocoumarin；3-(3,4-dihydroxyphenyl)-8-hydroxy-3,4-dihydroisochromen-1-one
• CAS: 80394-88-3
• 化学式: C₁₅H₁₂O₅
• 分子量: 272.257
• InChiKey: RQDGXYMBVTZQNF-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.8
• 重原子数：
  20
• 可旋转键数：
  1
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.13
• 拓扑面积：
  87
• 氢给体数：
  3
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  Thunberginol G 在 咪唑 、 四丁基氟化铵 、 2,3-二氯-5,6-二氰基-1,4-苯醌 作用下， 生成 3-(3,4-二羟基苯基)-8-羟基异苯并吡喃-1-酮
  参考文献：
  名称：

  Chemical Transformation from Dihydroisocoumarin into Benzylidenephthalide by Use of Regiospecific Oxidative Lactonization Mediated by Copper Chloride(II). Syntheses of Thunberginol F and Hydramacrophyllol A and B.

  摘要：

  CuCl2 介导的 2-羧基二苯乙烯的氧化内酯化反应进行区域特异性，得到五元内酯。利用该内酯化反应作为关键反应，完成了从二氢异香豆素到亚苄基苯酞的化学转化，并将其应用于两种新的苯酞——Hydrmacrophyllols A和B的结构解析。

  DOI：

  10.1248/cpb.42.721
• 作为产物：
  描述：

  3,4-二苄氧基苯甲醛 在 sodium hydrogen sulfate 、 copper(ll) sulfate pentahydrate 、 palladium 10% on activated carbon 、 氢气 、 sodium methylate 、 sodium hydride 作用下， 以 四氢呋喃 、 甲醇 、 水 、 N,N-二甲基甲酰胺 为溶剂， 反应 24.83h， 生成 Thunberginol G
  参考文献：
  名称：

  3-芳基异香豆素的酰基阴离子化学合成及丁香酚A和Cajanolactone A的合成

  摘要：

  3-芳基异香豆素和8-羟基-3-芳基异香豆素的合成新策略通过使用酰基阴离子化学进行初始C-C键形成研究。得到的酮酯和酮内酯作为中间体进行基于促进的分子内环化，以良好的产率得到3-芳基异香豆素。所开发的方法用于合成重要的天然产物 thunberginol A 和 cajanolactone A。

  DOI：

  10.1002/ejoc.201403524

文献信息

• Copper-Catalyzed Oxidative Cyclization of Carboxylic Acids
  作者：Shyam Sathyamoorthi、J. Du Bois

  DOI：10.1021/acs.orglett.6b03176

  日期：2016.12.16

  for converting C–H to C–O bonds through oxidative cyclization of carboxylic acids to generate lactone products is described. The reaction employs catalytic amounts of Cu(OAc)2 and potassium persulfate as the terminal oxidant and is performed open to air in an aqueous acetic acid solvent system. Preliminary mechanistic studies suggest that substrate oxidation likely proceeds by sulfate radical anion

  描述了一种通过羧酸的氧化环化反应将C–H转换为C–O键以生成内酯产物的方法。该反应采用催化量的Cu（OAc）2和过硫酸钾作为末端氧化剂，并在乙酸水溶液体系中在空气中开放进行。初步的机理研究表明，底物氧化可能是由硫酸根阴离子引起的，而Cu催化剂对产物确定步骤没有影响。这些结论与提出羧酸酯基团的中间体的相关研究不同。
• Development of Bioactive Functions in Hydrangeae Dulcis Folium. V. On the Antiallergic and Antimicrobial Principles of Hydrangeae Dulcis Folium. (2). Thunberginols C, D, and E, Thunberginol G 3'-O-Glucoside, (-)-Hydrangenol 4'-O-Glucoside, and (+)-Hydrangenol 4'-O-Glucoside.
  作者：Masayuki YOSHIKAWA、Hisashi MATSUDA、Hiroshi SHIMODA、Hiromi SHIMADA、Emiko HARADA、Yoshikazu NAITOH、Akiko MIKI、Johji YAMAHARA、Nobutoshi MURAKAMI

  DOI：10.1248/cpb.44.1440

  日期：——

  Following the characterization of thunberginols A, B, and F, six bioactive principles, thunberginols C, D, and E, thunberginol G 3'-O-glucoside, (-)-hydrangenol 4'-O-glucoside, and (+)-hydrangenol 4'-O-glucoside, were isolated from Hydrangeae Dulcis Folium, the processed leaves of Hydrangea macrophylla SERINGE var. thunbergii MAKINO, together with four kaempferol and quercetin oligoglycosides. Their chemical structures have been determined on the basis of chemical and physicochemical evidence. Thunberginols C, D, E, and G and (-)-hydrangenol 4'-O-glucoside showed antiallergic activity in the in vitro bioassay using the Schultz-Dale reaction. These components also exhibited inhibitory activities on the histamine release from rat mast cells and on the histamine-induced contraction in isolated guinea pig tracheal chain. In addition, thunberginols C, D, E, and G showed antimicrobial activities against oral bacteria.

  在鉴定出山楂素A、B和F这六种生物活性成分后，研究人员又从山楂叶中分离出山楂素C、D和E、山楂素G 3'-O-葡萄糖苷、(-)-绣线菊醇4'-O-葡萄糖苷和(+)-绣线菊醇4'-O-葡萄糖苷，以及四种山楂素和槲皮素低聚糖苷。根据化学和物理化学证据，确定了它们的化学结构。在采用舒尔茨-戴尔反应的体外生物测定中，山楂素C、D、E和G以及(-)-绣线菊醇4'-O-葡萄糖苷显示出抗过敏活性。这些成分还能抑制大鼠肥大细胞释放组胺，抑制组胺诱导的离体豚鼠气管收缩。此外，山楂素C、D、E和G还能抑制口腔细菌。
• Titanocene(III) chloride mediated radical-induced synthesis of 3,4-dihydroisocoumarins: synthesis of (±)-hydrangenol, (±)-phyllodulcin, (±)-macrophyllol and (±)-thunberginol G
  作者：Samir Kumar Mandal、Subhas Chandra Roy

  DOI：10.1016/j.tet.2008.09.075

  日期：2008.12

  A radical-promoted synthesis of 3,4-dihydroisocoumarins has been achieved in moderate to good yields using titanocene(III) chloride (Cp2TiCl) as the radical initiator. The total synthesis of four naturally occurring dihydrocoumarins hydrangenol, phyllodulcin, macrophyllol and thunberginol G has been accomplished using the radical technology. Cp2TiCl was prepared in situ from commercially available titanocene dichloride (Cp2TiCl2) and Zn-dust in THF under argon. (C) 2008 Elsevier Ltd. All rights reserved.
• Metabolic Fate of Orally Administered Phyllodulcin in Rats
  作者：Takaaki Yasuda、Saiko Kayaba、Kana Takahashi、Takahiro Nakazawa、Keisuke Ohsawa

  DOI：10.1021/np0400353

  日期：2004.9.1

  Naturally occurring phyllodulcin (1) was orally administered to rats to investigate its metabolic fate. Urinary metabolites were analyzed by three-dimensional HPLC. Phyllodulcin-3'-0-sulfate (2), phyllodulcin-3'-0- -glucuronide (3),2-[2-(3,4-dihydroxyphenyl)ethyl]-6-hydroxybenzoic acid (4), and one novel bibenzyl derivative, 2-[2-(3-hydroxy-4-methoxyphenyl)ethyl]-6-hydroxybenzoic acid (5), together with thunberginol G (6) and hydrangenol (7) were isolated from the phyllodulcin-treated urine. 1 was extensively metabolized to 4-6 by a rat fecal suspension after incubation for 24 h. Urinary excretion of 4-6 in rats administered phyllodulcin orally was substantially reduced when the rats were treated with antibiotics to suppress their intestinal flora. On the other hand, the incubation of 1 with rat liver S-9 mix showed the presence of 7 together with 4 and 5.
• Synthesis of 3-Arylisocoumarins by Using Acyl Anion Chemistry and Synthesis of Thunberginol A and Cajanolactone A
  作者：Kasireddy Sudarshan、Manash Kumar Manna、Indrapal Singh Aidhen

  DOI：10.1002/ejoc.201403524

  日期：2015.3

  new strategy for the synthesis of 3-arylisocoumarins and 8-hydroxy-3-arylisocoumarins was investigated by using acyl anion chemistry for the initial C–C bond formation. The obtained keto esters and keto lactones as intermediates underwent based-promoted intramolecular cyclization to afford 3-arylisocoumarins in good yields. The developed methodology was applied for the synthesis of the important natural

  3-芳基异香豆素和8-羟基-3-芳基异香豆素的合成新策略通过使用酰基阴离子化学进行初始C-C键形成研究。得到的酮酯和酮内酯作为中间体进行基于促进的分子内环化，以良好的产率得到3-芳基异香豆素。所开发的方法用于合成重要的天然产物 thunberginol A 和 cajanolactone A。