3-甲基-1-苯基-4,5-二氢吡唑 | 10252-46-7

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑类
• 中文名称: 3-甲基-1-苯基-4,5-二氢吡唑
• 英文名称: 3-methyl-1-phenyl-4,5-dihydropyrazole
• 英文别名: 3-methyl-1-phenyl-4,5-dihydro-1H-pyrazole；1,3-diphenyl-4,5-dihydro-1H-pyrazole；3-methyl-1-phenyl-4,5-dihydro-1H-pyrazole；3-Methyl-1-phenyl-4,5-dihydro-1H-pyrazol；1-Phenyl-3-methyl-4,5-dihydro-1H-pyrazol；5-methyl-2-phenyl-3,4-dihydropyrazole
• CAS: 10252-46-7
• 化学式: C₁₀H₁₂N₂
• mdl: MFCD00456564
• 分子量: 160.219
• InChiKey: UKJCZGTZCWPKLF-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.8
• 重原子数：
  12
• 可旋转键数：
  1
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.3
• 拓扑面积：
  15.6
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  3-甲基-1-苯基-4,5-二氢吡唑 在 叔丁基过氧化氢 、 copper diacetate 作用下， 以 乙腈 为溶剂， 反应 0.17h， 以95%的产率得到3-甲基-1-苯基吡唑
  参考文献：
  名称：

  吡唑啉与活化炔烃的意外开环：1H-吡唑-4,5-二羧酸盐和色烯吡唑羧酸盐的合成

  摘要：

  1 H -Pyrazole-4,5-dicarboxylates 和 chromenopyrazole carboxylates 是通过在没有催化剂的纯净条件下使吡唑啉与活化的炔烃反应制备的。产物是通过吡唑啉的意外开环和苯乙烯/乙烯的消除而形成的。这些类型的转化是未知的，并且使用它们的光谱/分析数据确认了所形成的产物。此外，化合物5e和5n的结构通过单晶X射线分析证实。进行了对照实验以支持所提出的反应机理。

  DOI：

  10.1039/d1ob01727f
• 作为产物：
  描述：

  苯甲醛苯腙 在 三乙烯二胺 、 盐酸 作用下， 以 N,N-二甲基甲酰胺 、 甲苯 为溶剂， 反应 36.0h， 生成 3-甲基-1-苯基-4,5-二氢吡唑
  参考文献：
  名称：

  DABCO-catalyzed reactions of hydrazones with activated olefins

  摘要：

  This paper describes several highly efficient DABCO-catalyzed aza-Michael addition reactions of hydrazones to activated olefins. In most cases, these aza-Michael addition reactions gave the corresponding products in high yields under mild conditions. The plausible reaction mechanism is discussed on the basis of deuterium labeling experiments. Upon treatment with HCl, the corresponding cyclized products can be obtained in high yields from the Michael addition products. (c) 2005 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2005.04.071

文献信息

• TBHP/Cu(OAc)₂ mediated oxidation of pyrazolines: A convenient method for the preparation of pyrazoles
  作者：Sai Teja Kolla、Ramya Somanaboina、China Raju Bhimapaka

  DOI：10.1080/00397911.2021.1885716

  日期：2021.5.3

  Abstract An efficient and simple oxidative protocol has been developed for the preparation of pyrazoles from pyrazolines mediated by TBHP/Cu(OAc)2 at room temperature. The present protocol has been successfully applied for the preparation of various pyrazole compounds from heterocyclic pyrazolines.

  摘要 已经开发出一种有效且简单的氧化方案，用于在室温下从由TBHP / Cu（OAc）2介导的吡唑啉制备吡唑。本方案已成功地用于从杂环吡唑啉制备各种吡唑化合物。
• Microwave-assisted cyclocondensation of hydrazine derivatives with alkyl dihalides or ditosylates in aqueous media: syntheses of pyrazole, pyrazolidine and phthalazine derivatives
  作者：Yuhong Ju、Rajender S. Varma

  DOI：10.1016/j.tetlet.2005.07.018

  日期：2005.9

  Direct syntheses of 4,5-dihydro-pyrazole, pyrazolidine, and 1,2-dihydro-phthalazine derivatives via double-alkylation of hydrazines by alkyl dihalides or ditosylates were accomplished in aqueous media under microwave irradiation conditions; the environmentally friendlier chemical transformation occurred in a single step and eliminated the use of expensive metal catalysts in building two C–N bonds.

  在微波辐射条件下，在含水介质中，通过烷基二卤化物或二甲苯磺酸盐对肼的双烷基化反应，直接合成4，5-二氢吡唑，吡唑烷和1，2-二氢邻苯二甲酰肼衍生物。有利于环境的化学转化过程一步完成，消除了使用昂贵的金属催化剂来构建两个C–N键的过程。
• Oxidative cyclization of β-stannyl hydrazones
  作者：Hisao Nishiyama、Hiroyuki Arai、Yuki Kanai、Hiroyuki Kawashima、Kenji ltoh

  DOI：10.1016/s0040-4039(00)84019-8

  日期：1986.1

  Oxidation of β-stannyl hydrazones gave the corresponding azocyclopropanes in high yields. Homolytic cyclization involving hydrazonyl radicals ( π-iminamino radicals ) was postulated.

  β-锡烷基的氧化反应以高收率得到了相应的偶氮环丙烷。假定涉及肼基自由基（π-亚氨基氨基自由基）的均相环化。
• Ruthenium-Catalyzed Divergent Acceptorless Dehydrogenative Coupling of 1,3-Diols with Arylhydrazines: Synthesis of Pyrazoles and 2-Pyrazolines
  作者：Yanling Zheng、Yang Long、Huihua Gong、Jiaqi Xu、Chunchun Zhang、Haiyan Fu、Xueli Zheng、Hua Chen、Ruixiang Li

  DOI：10.1021/acs.orglett.2c01497

  日期：2022.6.3

  1,3-diols with arylhydrazines via acceptorless dehydrogenative coupling reactions to selectively synthesize pyrazoles and 2-pyrazolines were reported, which were based on Ru3(CO)12/NHC-phosphine-phosphine catalytic systems. The reactions featured low catalyst loading, high selectivity, wide substrate scope, and good yields, with only water and hydrogen gas (H2) as the byproducts.

  本文报道了基于Ru 3 (CO) 12 /NHC-膦-膦催化体系的1,3-二醇与芳基肼通过无受体脱氢偶联反应选择性合成吡唑和2-吡唑啉的不同转化。该反应具有催化剂负载量低、选择性高、底物范围广、收率高的特点，仅副产物水和氢气（H 2 ）。
• Development of Porous Organic Polymers as Metal‐Free Photocatalysts for the Aromatization of <i>N</i>‐Heterocycles
  作者：Maarten Debruyne、Nathan Raeymackers、Henk Vrielinck、Sambhu Radhakrishnan、Eric Breynaert、Maxime Delaey、Andreas Laemont、Karen Leus、Jonas Everaert、Hannes Rijckaert、Dirk Poelman、Rino Morent、Nathalie De Geyter、Pascal Van Der Voort、Veronique Van Speybroeck、Christian V. Stevens、Thomas S. A. Heugebaert

  DOI：10.1002/cctc.202301205

  日期：2024.4.8

  Porous organic polymers (POPs), and especially covalent triazine frameworks (CTFs), are being developed as the next generation of metal‐free heterogeneous photocatalysts. However, many of the current synthetic routes to obtain these photoactive POPs require expensive monomers and rely on precious metal catalysts, thus hindering their widespread implementation. In this work, a range of POPs was synthesized from simple unfunctionalized aromatic building blocks, through Lewis acid‐catalyzed polymerization. The obtained materials were applied, for the first time, as heterogeneous photocatalysts for the aromatization of N‐heterocycles. With the use of the most active material, denoted as CTF‐Pyr, which consists of photoactive pyrene and triazine moieties, a wide range of pyridines, dihydroquinoline‐5‐ones, tetrahydroacridine‐1,8‐diones and pyrazoles were obtained in excellent yields (70–99 %). Moreover, these reactions were carried out under very mild conditions using air and at room temperature, highlighting the potential of these materials as catalysts for green transformations.

  摘要 多孔有机聚合物（POPs），尤其是共价三嗪框架（CTFs），正被开发为下一代无金属异相光催化剂。然而，目前获得这些光活性持久性有机聚合物的许多合成路线都需要昂贵的单体并依赖贵金属催化剂，因此阻碍了它们的广泛应用。在这项研究中，我们通过路易斯酸催化聚合反应，从简单的非官能化芳香族结构单元合成了一系列持久性有机污染物。所获得的材料首次被用作 N-杂环芳香化的异相光催化剂。使用活性最高的材料 CTF-Pyr（由具有光活性的芘和三嗪分子组成），可以获得多种吡啶、二氢喹啉-5-酮、四氢吖啶-1,8-二酮和吡唑，收率极高（70-99%）。此外，这些反应都是在非常温和的条件下，利用空气在室温下进行的，突出了这些材料作为绿色转化催化剂的潜力。