3-bromo-7-hydroxycoumarin | 146900-52-9

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 香豆素及其衍生物
• 英文名称: 3-bromo-7-hydroxycoumarin
• 英文别名: 3-bromo-7-hydroxy-2H-1-benzopyran-2-one；3-Bromo-7-hydroxy-2H-chromen-2-one；3-bromo-7-hydroxychromen-2-one
• CAS: 146900-52-9
• 化学式: C₉H₅BrO₃
• 分子量: 241.041
• InChiKey: KTJJENNDBOOPSS-UHFFFAOYSA-N

物化性质

• 熔点：
  242 °C (decomp)
• 沸点：
  428.1±45.0 °C(Predicted)
• 密度：
  1.884±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.5
• 重原子数：
  13
• 可旋转键数：
  0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  46.5
• 氢给体数：
  1
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  3-bromo-7-hydroxycoumarin 在 1,1'-双(二苯膦基)二茂铁二氯化钯(II)二氯甲烷复合物 、 偶氮二甲酸二异丙酯 、 potassium carbonate 、 三苯基膦 作用下， 以 四氢呋喃 、 1,4-二氧六环 为溶剂， 反应 14.0h， 生成 3-(2-chlorophenyl)-7-((1-methylpiperidin-4-yl)oxy)-2H-chromen-2-one
  参考文献：
  名称：

  3-Arylcoumarin Derivatives Manifest Anti-proliferative Activity through Hsp90 Inhibition

  摘要：

  The potential therapeutic benefits associated with Hsp90 modulation for the treatment of cancer and neurodegenerative diseases highlight the importance of identifying novel Hsp90 scaffolds. KU-398, a novobiocin analogue, and silybin were recently identified as new Hsp90 inhibitors. Consequently, a library of 3-arylcoumarin derivatives that incorporated the structural features of KU-398 and silybin was designed, synthesized, and evaluated against two breast cancer cell lines. Western blot analysis confirmed that the resulting 3-arylcoumarin hybrids target the Hsp90 protein folding machinery.

  DOI：

  10.1021/ml300018e
• 作为产物：
  描述：

  7-甲氧基香豆素 在 N-溴代丁二酰亚胺(NBS) 、 sodium acetate 、 三溴化硼 作用下， 以 二氯甲烷 、 乙腈 为溶剂， 反应 12.0h， 生成 3-bromo-7-hydroxycoumarin
  参考文献：
  名称：

  3-Arylcoumarin Derivatives Manifest Anti-proliferative Activity through Hsp90 Inhibition

  摘要：

  The potential therapeutic benefits associated with Hsp90 modulation for the treatment of cancer and neurodegenerative diseases highlight the importance of identifying novel Hsp90 scaffolds. KU-398, a novobiocin analogue, and silybin were recently identified as new Hsp90 inhibitors. Consequently, a library of 3-arylcoumarin derivatives that incorporated the structural features of KU-398 and silybin was designed, synthesized, and evaluated against two breast cancer cell lines. Western blot analysis confirmed that the resulting 3-arylcoumarin hybrids target the Hsp90 protein folding machinery.

  DOI：

  10.1021/ml300018e

文献信息

• Microwave Induced Selective Bromination of 1,4-Quinones and Coumarins
  作者：Vandana Bansal、Saraswati Kanodia、Prakash C. Thapliyal、Rajinder N. Khanna

  DOI：10.1080/00397919608003692

  日期：1996.3

  Abstract Microwave irradiation accelerates the bromination of 1, 4-quinones and coumarins with (i) bromine adsorbed on neutral alumina in “dry media” and (ii) with iodine monobromide in acetic acid as compared to the reactions run at room temperature. Bromination takes place selectively at active quinonoid position in 1,4-quinones and at α, β-double bond in coumarins.

  摘要 与室温下进行的反应相比，微波辐射加速了 1, 4-醌和香豆素的溴化，(i) 在“干燥介质”中吸附在中性氧化铝上的溴和 (ii) 在乙酸中的一溴化碘。溴化发生在 1,4-醌类中的活性醌类位置和香豆素中的 α, β-双键处。
• Mild Regioselective Monobromination of Activated Aromatics and Hetero­aromatics with<i>N</i>-Bromosuccinimide in Tetrabutylammonium Bromide
  作者：Nemai C. Ganguly、Prithwiraj De、Sanjoy Dutta

  DOI：10.1055/s-2005-861866

  日期：——

  often an unselective reaction resulting in a mixture of mono- and polybrominated derivatives with consequent tedious separation problems and poor atom economy. Therefore, the search for new regioselective methods of bromination has evoked great contemporary interest. Use of NBS for nuclear bromination in polar me- dia such as DMF, 6a MeCN, 6b,c aqueous NaOH, 6d in the presence of acids, 6e,f,g silica gel

  使用四丁基溴化铵中的 N-溴代琥珀酰亚胺已经完成了活化芳族和杂芳族化合物的高度区域选择性核溴化。活性芳烃（如苯酚和苯胺）的主要对位选择性单溴化，在添加酸性蒙脱石 K-10 粘土（有或没有微波辅助）时加速中度活化和反应性较低的底物的溴化速率是这个协议。芳烃和杂芳烃的溴化是一种具有巨大合成和工业重要性的电取代反应。溴化芳烃和杂芳烃可用作药物、阻燃剂、农用化学品、特种化学品 1 和合成中间体能够通过金属转移反应（如 Heck、Stille、Suzuki、Sonogashira 和 Tamao-Kumada 反应）形成碳-碳键。2 一般来说，环溴代芳烃和杂芳烃表现出有趣的生物活性。3 卤素取代的嘧啶和嘌呤对其化学治疗、生化和生物物理特性特别重要。4 除了可用作荧光团和光物理探针的潜在中间体外，5a 溴香豆素作为呋喃香豆素和二氢呋喃香豆素的合成前体也很重要，它们被广泛用作抗皮肤病的光敏剂和化学治疗剂，5b-d
• Simple Catalyst-Free Regio- and Chemoselective Monobromination of Aromatics Using NBS in Polyethylene Glycol
  作者：Katta Venkateswarlu、Kanaparthy Suneel、Biswanath Das、Kuravallapalli Nagabhushana Reddy、Thummala Sreenivasulu Reddy

  DOI：10.1080/00397910801911752

  日期：2008.12.31

  Abstract NBS in polyethylene glycol has been efficiently utilized for regio- and chemoselective bromination of activated aromatics at room temperature to form the corresponding bromo products in excellent yields.

  摘要 聚乙二醇中的 NBS 已被有效地用于室温下活化芳烃的区域选择性和化学选择性溴化，以优异的产率形成相应的溴化产物。
• An efficient regioselective bromination protocol of activated coumarins using 2,4,4,6-tetrabromo-2,5-cyclohexadienone
  作者：Nemai C. Ganguly、Subhasis Nayek、Sumanta Chandra

  DOI：10.1139/cjc-2013-0230

  日期：2013.11

  2,4,4,6-Tetrabromo-2,5-cyclohexadienone mediated bromination of a wide assortment of activated coumarins in acetonitrile has been accomplished with high regioselectivity and good to excellent yields. The selectivity and efficiency of bromination were found to be markedly dependent on electronic factors, particularly degree of electron withdrawal from electron-releasing 7-oxygenated substituents to the C-3 position of the α-pyrone moiety by vinylogous resonance and the presence of nucleophilic additives such as water and tetra-n-butylammonium bromide in the reaction medium. The sole by-product of the reaction was converted back to the reagent by oxidation with KBr−KBrO₃, which was recycled three times without significant loss of efficiency.

  在乙腈中，2,4,4,6-四溴-2,5-环己二酮介导的对活化香豆素的溴化反应以高区域选择性和良好至优良的产率完成。发现溴化的选择性和效率在很大程度上取决于电子因素，特别是从电子给予的7-氧代取代基到α-吡喃酮部分的C-3位置的电子撤离程度，通过共轭共振和在反应介质中存在水和四正丁基溴化铵等亲核添加剂。反应的唯一副产物通过氧化与KBr−KBrO₃转化回试剂，试剂可以循环使用三次而不会显著损失效率。
• A Copper Halide Promoted Regioselective Halogenation of Coumarins Using N-Halosuccinimide as Halide Source
  作者：Min Zhang、Jinling Su、Yan Zhang、Mingren Chen、Weiming Li、Xuewei Qin、Yanping Xie、Lixiao Qin、Shihua Huang

  DOI：10.1055/s-0037-1612080

  日期：2019.3

  A safe, convenient, and regioselective synthesis of 3-halo coumarins using a metal halide (CuX2 alone or with ZnX2) promoted halogenation with N-halosuccinimide (NXS) as halide source is reported. The synthesis involved the steady in situ generation of highly reactive positive halogen (X+) by the coordination of copper or zinc with the N-halosuccinimide and subsequent electrophilic aromatic substitution

  据报道，使用金属卤化物（单独的 CuX2 或与 ZnX2）促进卤化，以 N-卤代琥珀酰亚胺（NXS）作为卤化物源，安全、方便和区域选择性地合成 3-卤香豆素。该合成涉及通过铜或锌与 N-卤代琥珀酰亚胺的配位以及随后缺电子香豆素的亲电芳香取代，在原位稳定生成高活性正卤素 (X+)。该程序也适用于以中等至定量产率卤化含电子量较低的萘醌、黄酮和甲氧基补骨脂素。该协议具有简单的实验条件，使用容易获得的廉价试剂，并为一些有用的杂芳族化合物的氯化或溴化提供了方便的方法。