8,9-dimethoxy-6H-benzofuro[3,2-c]chromen-6-one | 58840-70-3

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 异黄酮类化合物
• 英文名称: 8,9-dimethoxy-6H-benzofuro[3,2-c]chromen-6-one
• 英文别名: 8,9-Dimethoxy-[1]benzofuro[3,2-c]chromen-6-one；8,9-dimethoxy-[1]benzofuro[3,2-c]chromen-6-one
• CAS: 58840-70-3
• 化学式: C₁₇H₁₂O₅
• 分子量: 296.279
• InChiKey: AVRFBHWQLKBJCS-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.4
• 重原子数：
  22
• 可旋转键数：
  2
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.12
• 拓扑面积：
  57.9
• 氢给体数：
  0
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  8,9-dimethoxy-6H-benzofuro[3,2-c]chromen-6-one 在 三溴化硼 、 水 作用下， 以 二氯甲烷 为溶剂， 以91%的产率得到8,9-dihydroxy-6H-benzofuro<3,2-c><1>benzopyran-6-one
  参考文献：
  名称：

  Coumestan Inhibits Radical-Induced Oxidation of DNA: Is Hydroxyl a Necessary Functional Group?

  摘要：

  Coumestan is a natural tetracycle with a C═C bond shared by a coumarin moiety and a benzofuran moiety. In addition to the function of the hydroxyl group on the antioxidant activity of coumestan, it is worth exploring the influence of the oxygen-abundant scaffold on the antioxidant activity as well. In this work, seven coumestans containing electron-withdrawing and electron-donating groups were synthesized to evaluate the abilities to trap 2,2'-azinobis(3-ethylbenzothiazoline-6-sulfonate) cationic radical (ABTS(•+)), 2,2'-diphenyl-1-picrylhydrazyl radical (DPPH), and galvinoxyl radical, respectively, and to inhibit the oxidations of DNA mediated by (•)OH, Cu(2+)/glutathione (GSH), and 2,2'-azobis(2-amidinopropane hydrochloride) (AAPH), respectively. It was found that all of the coumestans used herein can quench the aforementioned radicals and can inhibit (•)OH-, Cu(2+)/GSH-, and AAPH-induced oxidations of DNA. In particular, substituent-free coumestan exhibits higher ability to quench DPPH and to inhibit AAPH-induced oxidation of DNA than Trolox. In addition, nonsubstituted coumestan shows a similar ability to inhibit (•)OH- and Cu(2+)/GSH-induced oxidations of DNA relative to that of Trolox. The antioxidant effectiveness of the coumestan can be attributed to the lactone in the coumarin moiety and, therefore, a hydroxyl group may not be a necessary functional group for coumestan to be an antioxidant.

  DOI：

  10.1021/jf500013v
• 作为产物：
  描述：

  3,4-dimethoxyphenylacetic acid 2-(methoxycarbonyl)phenyl ester 在 吡啶 、 iron(III) chloride 、 silica gel 、 potassium hydroxide 作用下， 以 1,2-二氯乙烷 为溶剂， 反应 16.0h， 生成 8,9-dimethoxy-6H-benzofuro[3,2-c]chromen-6-one
  参考文献：
  名称：

  Coumestan Inhibits Radical-Induced Oxidation of DNA: Is Hydroxyl a Necessary Functional Group?

  摘要：

  Coumestan is a natural tetracycle with a C═C bond shared by a coumarin moiety and a benzofuran moiety. In addition to the function of the hydroxyl group on the antioxidant activity of coumestan, it is worth exploring the influence of the oxygen-abundant scaffold on the antioxidant activity as well. In this work, seven coumestans containing electron-withdrawing and electron-donating groups were synthesized to evaluate the abilities to trap 2,2'-azinobis(3-ethylbenzothiazoline-6-sulfonate) cationic radical (ABTS(•+)), 2,2'-diphenyl-1-picrylhydrazyl radical (DPPH), and galvinoxyl radical, respectively, and to inhibit the oxidations of DNA mediated by (•)OH, Cu(2+)/glutathione (GSH), and 2,2'-azobis(2-amidinopropane hydrochloride) (AAPH), respectively. It was found that all of the coumestans used herein can quench the aforementioned radicals and can inhibit (•)OH-, Cu(2+)/GSH-, and AAPH-induced oxidations of DNA. In particular, substituent-free coumestan exhibits higher ability to quench DPPH and to inhibit AAPH-induced oxidation of DNA than Trolox. In addition, nonsubstituted coumestan shows a similar ability to inhibit (•)OH- and Cu(2+)/GSH-induced oxidations of DNA relative to that of Trolox. The antioxidant effectiveness of the coumestan can be attributed to the lactone in the coumarin moiety and, therefore, a hydroxyl group may not be a necessary functional group for coumestan to be an antioxidant.

  DOI：

  10.1021/jf500013v

文献信息

• Cyclization of 4-Phenoxy-2-coumarins and 2-Pyrones via a Double C–H Activation
  作者：Katrina Mackey、Leticia M. Pardo、Aisling M. Prendergast、Marie-T. Nolan、Lorraine M. Bateman、Gerard P. McGlacken

  DOI：10.1021/acs.orglett.6b00751

  日期：2016.6.3

  Aryl–heteroaryl coupling via double C–H activation is a powerful transformation that avoids the installation of activating groups. A double C–H activation of privileged biological scaffolds, 2-coumarins and 2-pyrones, is reported. Despite the rich chemistry of these molecular frameworks, the yields are very good. Excellent regioselectivity was achieved on the pyrones. This methodology was applied to the synthesis

  通过两次C–H活化进行的芳基–杂芳基偶联是一种有力的转化，可避免安装活化基团。据报道，特权生物支架，2-香豆素和2-吡喃酮具有双重C–H活化作用。尽管这些分子框架化学性质丰富，但收率还是很高的。在吡喃酮上获得了极好的区域选择性。该方法可通过三个步骤应用于氟美阿帕林C的合成。进行了同位素效应实验，并提出了机理。
• Copper-catalyzed intramolecular cross dehydrogenative coupling approach to coumestans from 2′-hydroxyl-3-arylcoumarins
  作者：Xianheng Song、Xiang Luo、Jianfei Sheng、Jianheng Li、Zefeng Zhu、Zhibo Du、Hui Miao、Meng Yan、Mingkang Li、Yong Zou

  DOI：10.1039/c9ra01909j

  日期：——

  A copper-catalyzed intramolecular cross dehydrogenative C–O coupling reaction of 2′-hydroxyl-3-arylcoumarins was developed. This protocol provided a facile and efficient strategy for the construction of natural coumestans and derivatives in moderate to high yields. This transformation exhibited good functional group compatibility and was amenable to substrates with free phenolic hydroxyl groups.

  开发了铜催化的 2'-羟基-3-芳基香豆素的分子内交叉脱氢 C-O 偶联反应。该协议为构建中等到高产量的天然coumestans和衍生物提供了一种简便有效的策略。该转化表现出良好的官能团相容性，并且适用于具有游离酚羟基的底物。
• Synthesis of Coumestan Derivatives via FeCl₃-Mediated Oxidative Ring Closure of 4-Hydroxy Coumarins
  作者：Lina Tang、Yongle Pang、Qiao Yan、Liuqing Shi、Jianhui Huang、Yunfei Du、Kang Zhao

  DOI：10.1021/jo2000644

  日期：2011.4.15

  A concise and efficient approach to the syntheses of coumestan analogues has been developed. The underpinning strategy involves a FeCl3-mediated direct intramolecular oxidative annellation of 4-hydroxy-3-phenyl-2H-chromen-2-one derivatives. Utilizing this synthetic protocol, a variety of coumestan derivatives were conveniently obtained from readily available reagents.

  已经开发了一种简洁有效的方法来合成香豆素类似物。支撑策略涉及FeCl 3介导的4-羟基-3-苯基-2 H-铬烯-2-酮衍生物的分子内直接氧化烯丙基化反应。利用该合成方案，可以容易地从容易获得的试剂中获得多种香豆素衍生物。
• Joshi, B. S.; Viswanathan, N.; Kaul, C. L., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1980, vol. <B> 19, # 6, p. 495 - 499
  作者：Joshi, B. S.、Viswanathan, N.、Kaul, C. L.、Grewal, R. S.

  DOI：——

  日期：——
• Pd-Catalyzed C–S Activation for [3 + 3] Annulation of 2-(Methylthio)benzofuran-3-carboxylates and 2-Hydroxyphenylboronic Acids: Synthesis of Coumestan Derivatives
  作者：Jingxin Liu、Yingjie Liu、Wenting Du、Ying Dong、Jun Liu、Mang Wang

  DOI：10.1021/jo400984h

  日期：2013.7.19

  Pd-catalytic C-S activation was successfully applied to initiate the cross-coupling of (2-methylthio-3-ester)benzofurans with 2-hydroxyphenylboronic acids and sequential intramolecular transesterification process under Liebeskind-Srogl conditions. Thus, a novel [3 + 3] annulation strategy for efficient synthesis of coumestan derivatives has been developed from readily available starting materials.