2-(naphthalen-2-yl)benzofuran | 26870-25-7

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 2-芳基苯并呋喃类黄酮
• 英文名称: 2-(naphthalen-2-yl)benzofuran
• 英文别名: 2-naphthalen-2-yl-1-benzofuran
• CAS: 26870-25-7
• 化学式: C₁₈H₁₂O
• 分子量: 244.293
• InChiKey: VFAQWWHSQWREJR-UHFFFAOYSA-N

物化性质

• 熔点：
  163 °C
• 沸点：
  407.0±14.0 °C(Predicted)
• 密度：
  1.187±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  5.2
• 重原子数：
  19
• 可旋转键数：
  1
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  13.1
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为反应物：
  描述：

  2-(naphthalen-2-yl)benzofuran 在 氧气 、 nitrosonium tetrafluoroborate 、 三氟乙酸 作用下， 以 乙腈 为溶剂， 反应 2.0h， 以66%的产率得到2,2'-di(naphthalen-2-yl)-3,3'-bibenzofuran
  参考文献：
  名称：

  Aerobic, Metal-Free, and Catalytic Dehydrogenative Coupling of Heterocycles: En Route to Hedgehog Signaling Pathway Inhibitors

  摘要：

  The nitrosonium ion-catalyzed dehydrogenative coupling of heteroarenes under mild reaction conditions is reported. The developed method utilizes ambient molecular oxygen as a terminal oxidant, and only water is produced as byproduct. Dehydrogenative coupling of heteroarenes translated into the rapid discovery of novel hedgehog signaling pathway inhibitors, emphasizing the importance of the developed methodology.

  DOI：

  10.1021/acs.orglett.8b00521
• 作为产物：
  描述：

  o-((trimethylsilyl)ethynyl)phenol 在 potassium fluoride 、 copper(l) iodide 、 bis(triphenylphosphine) palladium (Il) acetate 、 三乙胺 作用下， 以 甲醇 、 N,N-二甲基甲酰胺 为溶剂， 反应 8.0h， 生成 2-(naphthalen-2-yl)benzofuran
  参考文献：
  名称：

  Palladium-Catalyzed Reaction of o-Ethynylphenols, o-((Trimethylsilyl)ethynyl)phenyl Acetates, and o-Alkynylphenols with Unsaturated Triflates or Halides:  A Route to 2-Substituted-, 2,3-Disubstituted-, and 2-Substituted-3-acylbenzo[b]furans

  摘要：

  The reaction of o-ethynylphenols 3 with a wide variety of unsaturated halides or triflates 6 in the presence of Pd(OAc)(2)(PPh(3))(2), CuI, and Et(3)N (procedure A) gives 2-vinyl- and 2-arylbenzo[b]furans 7, in good to high yield, through a palladium-catalyzed coupling followed by an in situ cyclization step. Small amounts of 2,3-disubstituted-benzo[b]furans 8 are usually isolated as side products. In some cases, however, compounds 8 are generated in significant yield or even as the main products. The formation of 8 can be prevented by employing alternative procedures (B and C) that use o-((trimethylsilyl)ethynyl)phenyl acetates 5 as starting building blocks. Procedure B is based on the palladium-catalyzed reaction of 5 with 6 in the presence of Pd(PPh(3))(4), Et(3)N, and n-Bu(4)NF, followed by the hydrolysis of the resultant coupling derivative 12 under basic conditions. Procedure C affords 7 through an in situ coupling/cyclization of 5 with 6 in the presence of Pd(PPh(3))(4) and KOBu(t). The utilization of o-alkynylphenols 9 as the starting alkynes in the palladium-catalyzed reaction with 6 leads to the formation of 2,3-disubstituted-benzo[b]furans 13 through an annulation process promoted by sigma-vinyl- and sigma-arylpalladium complexes generated in situ. The best results in this case are obtained by using KOAc and Pd(PPh(3))(4). In the presence of KOAc and Pd(PPh(3))(4), and under an atmosphere of carbon monoxide, the reaction of o-alkynylphenols with 6 provides 2-vinyl- and 2-aryl-3-acylbenzo[b]furans 14.

  DOI：

  10.1021/jo961051a

文献信息

• Nickel-Catalyzed Cross-Coupling of Aryl Phosphates with Arylboronic Acids
  作者：Hu Chen、Zhongbin Huang、Xiaoming Hu、Guo Tang、Pengxiang Xu、Yufen Zhao、Chien-Hong Cheng

  DOI：10.1021/jo2000034

  日期：2011.4.1

  The Suzuki−Miyaura cross-coupling of aryl phosphates using Ni(PCy3)2Cl2 as an inexpensive, bench-stable catalyst is described. Broad substrate scope and high efficiency are demonstrated by the syntheses of more than 40 biaryls and by constructing complex organic molecules. The poor reactivity of aryl phosphates relative to aryl halides is successfully employed to construct polyarenes by selective cross-coupling

  描述了使用Ni（PCy 3）2 Cl 2作为廉价，稳定的催化剂对芳基磷酸酯进行的Suzuki-Miyaura交叉偶联。超过40个联芳基的合成以及构建复杂的有机分子证明了广泛的底物范围和高效率。通过使用Pd和Ni催化剂进行选择性交叉偶联，成功地将磷酸芳基酯相对于芳基卤化物的不良反应性用于构建聚芳烃。
• Palladium-Catalyzed Solid-State Polyfluoroarylation of Aryl Halides Using Mechanochemistry
  作者：Rikuro Takahashi、Tamae Seo、Koji Kubota、Hajime Ito

  DOI：10.1021/acscatal.1c03731

  日期：2021.12.17

  products. Here, we show that solid-state high-temperature ball-milling conditions facilitate a palladium-catalyzed cross-coupling with polyfluorinated arylboronic acids and pinacol esters employing a simple catalytic system in the absence of any stoichiometric additives. This reaction exhibits a broad substrate scope and can be carried out in air, and the use of large amounts of dry and degassed organic solvents

  多氟化芳基硼亲核试剂和芳基卤化物之间的 Suzuki-Miyaura 交叉偶联能够有效构建有机材料和催化剂中常见的多氟化结构基序。与这种转化相关的一个关键挑战涉及弱亲核多氟化有机硼试剂的缓慢金属转移，这通常会降低偶联产物的产率。在这里，我们展示了固态高温球磨条件促进了钯催化与多氟化芳基硼酸和频哪醇酯的交叉偶联，在没有任何化学计量添加剂的情况下，采用简单的催化体系。该反应底物范围广，可在空气中进行，不需要使用大量干燥脱气的有机溶剂。
• Microwave-Assisted Suzuki Coupling Reactions with an Encapsulated Palladium Catalyst for Batch and Continuous-Flow Transformations
  作者：Ian R. Baxendale、Charlotte M. Griffiths-Jones、Steven V. Ley、Geoffrey K. Tranmer

  DOI：10.1002/chem.200501400

  日期：2006.5.24

  This article describes the design, optimisation and development of a Suzuki cross-coupling protocol mediated by an efficient palladium-encapsulated catalyst (Pd EnCat) under microwave irradiation. The methodology has been used in both batch mode for classical library preparation and in continuous-flow applications furnishing multigram quantities of material. Described is a method that uses direct focused

  本文介绍了在微波辐射下由高效钯封装的催化剂（Pd EnCat）介导的Suzuki交叉偶联方案的设计，优化和开发。该方法已在批处理模式下用于经典文库制备，并已在连续流应用中使用，以提供数克的材料。描述了一种在施加外部冷却源的同时使用直接聚焦微波加热的方法。这使得可以在整个反应期间保持低于正常的总体温度，从而导致反应产物的总产率和纯度的显着提高。关于固定催化剂体系的延长寿命和增强的反应性，讨论了该新颖的加热方案的其他方面。
• Strategy for Overcoming Full Reversibility of Intermolecular Radical Addition to Aldehydes: Tandem C–H and C–O Bonds Cleaving Cyclization of (Phenoxymethyl)arenes with Carbonyls to Benzofurans
  作者：Hong-Xing Zheng、Xiang-Huan Shan、Jian-Ping Qu、Yan-Biao Kang

  DOI：10.1021/acs.orglett.8b01207

  日期：2018.6.1

  An intermolecular addition of carbon radicals enabled by a cascade radical coupling strategy is developed. It includes an intermolecular alkyl radical addition to a carbonyl group followed by an intramolecular alkoxy radical addition to haloarenes and produces substituted benzofurans in high yields. The radical nature of this reaction is explored by radical trapping experiments and EPR analysis. The

  通过级联自由基偶联策略实现了碳自由基的分子间加成。它包括向羰基的分子间烷基加成，然后向卤代芳烃的分子内烷氧基加成，并以高收率产生取代的苯并呋喃。通过自由基捕获实验和EPR分析，探索了该反应的自由基性质。通过KIE实验和控制实验研究了该机理。该方法可以快速，实用地获得TAM-16的关键中间体，TAM-16是治疗结核病的安全有效的抗菌剂，因此，对有机合成和制药工业具有重要意义。
• Palladium-Catalysed Direct Cross-Coupling of Organolithium Reagents with Aryl and Vinyl Triflates
  作者：Carlos Vila、Valentín Hornillos、Massimo Giannerini、Martín Fañanás-Mastral、Ben L. Feringa

  DOI：10.1002/chem.201404398

  日期：2014.10.6

  A palladium‐catalysed cross‐coupling of organolithium reagents with aryl and vinyl triflates is presented. The reaction proceeds at 50 or 70 °C with short reaction times, and the corresponding products are obtained with moderate to high yields, with a variety of alkyl and (hetero)aryl lithium reagents.

  提出了钯催化的有机锂试剂与芳基和乙烯基三氟甲磺酸酯的交叉偶联。该反应在50或70°C下以较短的反应时间进行，并且使用各种烷基和（杂）芳基锂试剂，可以以中等至高收率获得相应的产物。