9-methoxy-6H-benzofuro[3,2-c]chromen-6-one | 60636-86-4

• 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: 9-methoxy-6H-benzofuro[3,2-c]chromen-6-one
• 英文别名: 9-Methoxy-[1]benzofuro[3,2-c]chromen-6-one
• CAS: 60636-86-4
• 化学式: C₁₆H₁₀O₄
• 分子量: 266.253
• InChiKey: SDHSGIPPGVNZDB-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.4
• 重原子数：
  20
• 可旋转键数：
  1
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.06
• 拓扑面积：
  48.7
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  9-methoxy-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96%的产率得到9-hydroxy-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
• 作为产物：
  描述：

  3-(2-hydroxy-4-methoxyphenyl)-2H-chromen-2-one 在 copper diacetate 作用下， 以 二苯醚 为溶剂， 反应 5.0h， 以70%的产率得到9-methoxy-6H-benzofuro[3,2-c]chromen-6-one
  参考文献：
  名称：

  通过C（sp 2）-H官能化的铜介导的香豆甾烷合成：香豆酚和4'- O-甲基香豆酚的保护基自由途径

  摘要：

  描述了一种简单高效的香豆素两步合成法。合成中的关键反应是使用易得的Cu（OAc）2将3-（2-羟苯基）香豆素进行C H官能化，以通过正式的氧化环化反应生成Coumestan环系统。该方法为天然存在的香豆雌酚和4'- O-甲基香豆雌酚提供了一条简短的无保护基团的途径。

  DOI：

  10.1016/j.tet.2017.07.057

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。
• One-pot two-step synthesis of 3-iodo-4-aryloxy coumarins and their Pd/C-catalyzed annulation to coumestans
  作者：Niranjan Panda、Irshad Mattan

  DOI：10.1039/c7ra12419h

  日期：——

  efficient protocol for the synthesis of various coumestans from the intramolecular annulation of 3-iodo-4-aryloxy coumarins through C–H activation has been developed. When 3-iodo-4-aryloxy coumarins were treated with 10% Pd/C (0.3 mol% Pd) in the presence of sodium acetate, the corresponding coumestans were produced in good to excellent yield. Reusability of the palladium catalyst was investigated in

  已经开发了一种通过 C-H 活化从 3-iodo-4-aryloxy 香豆素的分子内环化合成各种香豆素的有效方案。当在乙酸钠存在下用 10% Pd/C (0.3 mol% Pd) 处理 3-iodo-4-aryloxy 香豆素时，相应的香豆素以良好的产率产生。在多达三个连续循环中研究了钯催化剂的可重复使用性，发现反应的产率几乎没有改变。顺序碘化和O4-羟基香豆素的α-芳基化产生3-碘-4-芳氧基香豆素也可以在一锅两步法中以高产率从芳基碘化物开始。发现新戊酸是后一种方法生产 3-碘-4-苯氧基香豆素的最有效添加剂。带有给电子基团和吸电子基团的不同官能团也对反应条件具有耐受性。
• 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。
• Copper(I)-Mediated and Microwave-Assisted C_aryl−O_carboxylic Coupling:  Synthesis of Benzopyranones and Isolamellarin Alkaloids
  作者：Nopporn Thasana、Rattana Worayuthakarn、Phithakpong Kradanrat、Elliot Hohn、Lauren Young、Somsak Ruchirawat

  DOI：10.1021/jo701599g

  日期：2007.11.1

  [Graphics]A simple and highly effective C-O-carboxylic coupling reaction catalyzed by copper(l) salts has been developed to synthesize benzopyranones. The reaction of various 2-halobiarylcarboxylic acids was examined using microwave irradiation. A new class of pyrroloisoquinoline alkaloid, isolamellarin, was synthesized based on the annulation of dihydroisoquinoline with aryl pyruvates under basic condition and Cu-mediated/MW-assisted C-O-carboxylic lactonization.
• KUROSAWA K.; NOGAMI K., BULL. CHEM. SOC. JAP. <BCSJ-A8>, 1976, 49, NO 7, 1955-1957
  作者：KUROSAWA K.、 NOGAMI K.

  DOI：——

  日期：——