3-acetyl-2-methyl-5,5-diphenyl-4,5-dihydrofuran | 102860-77-5

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: 3-acetyl-2-methyl-5,5-diphenyl-4,5-dihydrofuran
• 英文别名: 1-(2-methyl-5,5-diphenyl-4,5-dihydrofuran-3-yl)ethan-1-one；Ethanone, 1-(4,5-dihydro-2-methyl-5,5-diphenyl-3-furanyl)-；1-(5-methyl-2,2-diphenyl-3H-furan-4-yl)ethanone
• CAS: 102860-77-5
• 化学式: C₁₉H₁₈O₂
• 分子量: 278.351
• InChiKey: NOTXIAVTENLNDZ-UHFFFAOYSA-N

物化性质

• 沸点：
  180-185 °C(Press: 0.998 Torr)
• 密度：
  1.126±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.6
• 重原子数：
  21
• 可旋转键数：
  3
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.21
• 拓扑面积：
  26.3
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  3-acetyl-2-methyl-5,5-diphenyl-4,5-dihydrofuran 在 盐酸 作用下， 以 乙腈 为溶剂， 反应 12.0h， 以94%的产率得到5,5-diphenyl-4-penten-2-one
  参考文献：
  名称：

  Synthesis of naphthalenes using acid-catalyzed ring-opening and recyclization of 3-acetyl-5,5-diaryl-2-methyl-4,5-dihydrofurans. Isolation of intermediates

  摘要：

  3-Acetyl-5,5-diaryl-2-methyl-4,5-dihydrofurans were heated in concentrated hydrochloric acid to give the 4-aryl-1-methylnaphthalenes in high yields. The same reaction was carried out in hydrochloric acid diluted with acetonitrile to give the 5,5-diaryl-4-penten-2-ones (87-96%), while treatment of the dihydrofurans with p-toluenesulfonic acid in acetonitrile afforded the 3-(2,2-diarylethenyl)-4-hydroxy-3-penten-2-ones (73-91%) which were transformed in diluted hydrochloric acid into the 5,5-diaryl-4-penten-2-ones. It was demonstrated that the 3- and 4-penten-2-ones were intermediates of the 3-aryl-1-methylnaphthalenes since the 3- and 4-penten-2-ones were easily converted into the corresponding naphthalenes in concentrated hydrochloric acid. The UV irradiation of the dihydrofurans in the presence of hydrochloric acid quantitatively gave the 2-acetyl-4-aryl-1methylnaphthalenes (94-97%) via the same 3-penten-2-one intermediates. (C) 2001 Elsevier Science Ltd. Al] rights reserved.

  DOI：

  10.1016/s0040-4039(01)00431-2
• 作为产物：
  描述：

  1,1-二苯基乙醇 在 甲酸 、 manganese(III) triacetate dihydrate 、 溶剂黄146 作用下， 反应 0.01h， 生成 3-acetyl-2-methyl-5,5-diphenyl-4,5-dihydrofuran
  参考文献：
  名称：

  二氢呋喃的高级合成：甲酸对 Mn(III) 基氧化的影响

  摘要：

  摘要 叔烷基胺（例如次氮基三（乙烷-2,1-二基）三（3-氧代丁酸酯）（1）与 1,1-二苯基乙烯（2a））的基于锰（III）的氧化在乙酸中有效地进行。酸-甲酸混合溶剂得到次氮基三(乙烷-2,1-二基)三(2-甲基-5,5-二苯基-4,5-二氢呋喃-3-羧酸酯) (3)。各种 β-二酮酯 4a-e、2,4-戊二酮 (6a)、丙二酸 (6b) 和丙二酸二乙酯 (6c) 与 1,1-二芳基乙烯 2a-d 的其他典型的基于 Mn(III) 的反应是也在类似的乙酸-甲酸混合溶剂中进行了研究，反应速度加快，产品收率增加。图形概要

  DOI：

  10.1080/00397911.2015.1049618

文献信息

• Evidence of Cu ^I /Cu ^II Redox Process by X‐ray Absorption and EPR Spectroscopy: Direct Synthesis of Dihydrofurans from β‐Ketocarbonyl Derivatives and Olefins
  作者：Hong Yi、Zhixiong Liao、Guanghui Zhang、Guoting Zhang、Chao Fan、Xu Zhang、Emilio E. Bunel、Chih‐Wen Pao、Jyh‐Fu Lee、Aiwen Lei

  DOI：10.1002/chem.201503822

  日期：2015.12.21

  oxidative coupling reactions. A mechanistic study on the CuI/CuII redox process, by X‐ray absorption (XAS) and electron paramagnetic resonance (EPR) spectroscopies, has elucidated the reduction mechanism of CuII to CuI by 1,3‐diketone and detailed investigation revealed that the halide ion is important for the reduction process. The oxidative nature of the thereby‐formed CuI has also been studied by XAS

  在铜催化的氧化偶联反应领域，Cu I / Cu II和Cu I / Cu III催化循环受到了激烈的争论。通过X射线吸收（XAS）和电子顺磁共振（EPR）光谱学对Cu I / Cu II氧化还原过程的机理研究，通过1,3-二酮阐明了Cu II还原为Cu I的机理并进行了详细研究揭示卤离子对于还原过程很重要。由此形成的Cu I的氧化性质XAS和EPR光谱学也进行了研究。该机理信息适用于铜催化的β-酮羰基衍生物氧化为二氢呋喃的环化反应。该协议为从容易获得的1,3-二羰基和烯烃制备高度取代的二氢呋喃环提供了理想的途径。
• Silver-Catalyzed Radical Cascade Cyclization toward 1,5-/1,3-Dicarbonyl Heterocycles: An Atom-/Step-Economical Strategy Leading to Chromenopyridines and Isoxazole-/Pyrazole-Containing Chroman-4-Ones
  作者：Hao Hu、Xiaolan Chen、Kai Sun、Junchao Wang、Yan Liu、Hui Liu、Lulu Fan、Bing Yu、Yuanqiang Sun、Lingbo Qu、Yufen Zhao

  DOI：10.1021/acs.orglett.8b02627

  日期：2018.10.5

  A novel and convenient silver-catalyzed radical cascade cyclization toward a large variety of 1,5-/1,3-dicarbonyl heterocycles containing a chroman-4-one, indanone, or 2,3-dihydroquinolin-4(1H)-one moiety was developed, by reacting various 2-functionalized benzaldehydes, including 2-allyloxy benzaldehydes, 2-allyl benzaldehyde, and 2-N(Ts)CH2–CH═CH2 substituted benzaldehyde, with 1,3-dicarbonyl compounds

  一种新颖且方便的银催化自由基级联环化反应，形成多种多样的含苯并二氢吡喃-4-酮，茚满酮或2,3-二氢喹啉-4（1 H）-的1,5- / 1,3-二羰基杂环部分被开发，通过各种2官能苯甲醛，包括2-烯丙氧基苯甲醛，2-烯丙基苯甲醛，和2-N（Ts）的CH反应2 -CH = CH 2取代的苯甲醛，在存在1,3-二羰基化合物AgNO 3 / K 2 S 2 O 8的在温和的反应条件下放入一锅中。新获得的含1,5- / 1,3-二羰基的杂环进一步直接用于合成结构上更多样化的多杂环，主要包括色吡啶和含异恶唑或吡唑的苯并二氢吡喃-4-酮。
• Silver-catalyzed radical reaction of 2H-indazoles with 1,3-dicarbonyl compounds to access 3-dicarbonyl indazoles
  作者：Zhen-Hua Li、Wen-Biao Wang、Jin-Jing Qin、Li-Xian Ye、Jia-Yu He、Yuan-Yuan Xie

  DOI：10.1016/j.tet.2021.132227

  日期：2021.7

  direct synthesis of 3-substituted-2H-indazole derivatives was developed in the presence of AgNO3/Na2S2O8 under mild reaction conditions. The reaction affords a series of 1,3-dicarbonyl-2H-indazoles products with yields of up to 82%. The mechanism of the strategy suggests that the reaction proceeds through a radical pathway. Moreover, this strategy provides a new protocol for the synthesis of functionalized

  在温和的反应条件下，在 AgNO 3 /Na 2 S 2 O 8存在下，开发了一种直接合成 3-取代-2 H-吲唑衍生物的便捷策略。该反应提供了一系列 1,3-二羰基-2 H-吲唑产物，产率高达 82%。该策略的机制表明反应通过自由基途径进行。此外，该策略为功能化 2 H-吲唑的合成提供了新的方案。
• CAN-Mediated Oxidative Free Radical Reactions in an Ionic Liquid
  作者：Gregory Bar、Fabien Bini、Andrew F. Parsons

  DOI：10.1081/scc-120015703

  日期：2003.3

  Abstract Cerium(IV) ammonium nitrate-mediated oxidative radical reactions are carried out in the presence of ionic liquids, including 1-butyl-3-methylimidazolium tetrafluoroborate, for the first time. The presence of the ionic liquid not only increases the rate and yield of reactions in dichloromethane but also extends the range of 1,3-dicarbonyl precursors, which can be utilized in these carbon–carbon

  摘要 硝酸铈(IV)铵介导的氧化自由基反应首次在离子液体存在下进行，包括1-丁基-3-甲基咪唑鎓四氟硼酸盐。离子液体的存在不仅提高了二氯甲烷中反应的速率和产率，而且扩大了 1,3-二羰基前体的范围，可用于这些碳 - 碳键形成反应。
• Facile Access to Highly-Substituted Dihydrofurans Using Resonated Vinylpentanedione Radicals Generated by Mn(III)-Based Oxidation
  作者：Hiroshi Nishino、Sousuke Oka、Shintaro Hashimoto、Kazuki Hisano

  DOI：10.3987/com-21-14450

  日期：——

  Useful and easy access to highly-substituted dihydrofurans, which convert into various acetals, was established using the common Mn(III) oxidation. The key point is to use resonated vinylpentanedione radicals that cyclize to produce the desired acetoxydihydrofurans which are transformed into the hemiacetals and acetals in good yields under very mild conditions.

  使用常见的 Mn(III) 氧化建立了有用且容易获得可转化为各种缩醛的高度取代的二氢呋喃。关键点是使用共振的乙烯基戊二酮基团，其环化产生所需的乙酰氧基二氢呋喃，其在非常温和的条件下以良好的产率转化为半缩醛和缩醛。