2-(diflouoromethyl)-3-methylquinoxaline | 1355729-54-2

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 二氮杂萘
• 英文名称: 2-(diflouoromethyl)-3-methylquinoxaline
• 英文别名: 2-(difluoromethyl)-3-methylquinoxaline；Quinoxaline, 2-(difluoromethyl)-3-methyl-
• CAS: 1355729-54-2
• 化学式: C₁₀H₈F₂N₂
• 分子量: 194.184
• InChiKey: SCIPVGZJINFOMN-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.3
• 重原子数：
  14
• 可旋转键数：
  1
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.2
• 拓扑面积：
  25.8
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为产物：
  描述：

  2-甲基喹喔啉 、 二氟甲烷亚磺酸钠 在 rose bengal 作用下， 以 二甲基亚砜 为溶剂， 反应 24.0h， 以62%的产率得到2-(diflouoromethyl)-3-methylquinoxaline
  参考文献：
  名称：

  通过有机光氧化还原催化直接进行杂环的CH二氟甲基化。

  摘要：

  现代医学的发现依赖于合成方法的可持续发展，以满足与药物分子设计相关的需求。含有二氟甲基的杂环是新兴但很少研究的一类有机氟分子，具有在制药，农业和材料科学领域的潜在应用。在这里，我们开发了使用O2作为绿色氧化剂的杂环的有机光催化直接二氟甲基化反应。CH氧化二氟甲基化消除了对底物，金属和添加剂进行预官能化的需要。该操作简单的方法以中等至优异的产率丰富了许多二氟甲基化杂环的有效合成。药物分子的直接二氟甲基化证明了该方法对后期药物开发的实用性。此外，2'-脱氧-5-二氟甲基尿苷（F2TDR）对某些癌细胞系表现出有希望的活性，表明二氟甲基化方法可能为药物发现提供帮助。

  DOI：

  10.1038/s41467-020-14494-8

文献信息

• [EN] DIFLUOROMETHYLATION OF UNSATURATED COMPOUNDS<br/>[FR] DIFLUOROMÉTHYLATION DE COMPOSÉS INSATURÉS
  申请人：SCRIPPS RESEARCH INST

  公开号：WO2013082028A1

  公开（公告）日：2013-06-06

  A reagent for carrying out a difluoromethylation reaction of unsaturated compounds and ring-nitrogen-containing aromatic compounds, a zinc difluoro-methanesulfinate, as well as a method for making the reagent and a method for its use are disclosed.

  一种用于执行不饱和化合物和含环氮芳香化合物的二氟甲基化反应的试剂，以及一种锌二氟甲磺酸酯，以及制造该试剂的方法及其用途。
• Practical and innate carbon–hydrogen functionalization of heterocycles
  作者：Yuta Fujiwara、Janice A. Dixon、Fionn O’Hara、Erik Daa Funder、Darryl D. Dixon、Rodrigo A. Rodriguez、Ryan D. Baxter、Bart Herlé、Neal Sach、Michael R. Collins、Yoshihiro Ishihara、Phil S. Baran

  DOI：10.1038/nature11680

  日期：2012.12.6

  It is shown that zinc sulphinate salts can be used to transfer alkyl radicals to heterocycles, allowing for the mild, direct and operationally simple formation of medicinally relevant carbon–carbon bonds while reacting in a complementary fashion to other innate carbon–hydrogen functionalization methods. Nitrogen-rich heterocycles feature widely in pharmaceuticals, and their synthesis has been simplified by a series of advances in transition-metal-mediated cross-coupling reactions. However, the development of practical and selective C–H functionalization methods that do not rely upon pre-functionalized starting materials is an underdeveloped area. Here the authors report that zinc sulphinate salts can be used to transfer alkyl radicals to heterocycles, allowing for a mild, direct and operationally simple formation of medicinally relevant C–C bonds while reacting in an orthogonal fashion to other innate C–H functionalization methods. Nitrogen-rich heterocyclic compounds have had a profound effect on human health because these chemical motifs are found in a large number of drugs used to combat a broad range of diseases and pathophysiological conditions. Advances in transition-metal-mediated cross-coupling have simplified the synthesis of such molecules; however, C–H functionalization of medicinally important heterocycles that does not rely on pre-functionalized starting materials is an underdeveloped area1,2,3,4,5,6,7,8,9. Unfortunately, the innate properties of heterocycles that make them so desirable for biological applications—such as aqueous solubility and their ability to act as ligands—render them challenging substrates for direct chemical functionalization. Here we report that zinc sulphinate salts can be used to transfer alkyl radicals to heterocycles, allowing for the mild (moderate temperature, 50 °C or less), direct and operationally simple formation of medicinally relevant C–C bonds while reacting in a complementary fashion to other innate C–H functionalization methods2,3,4,5,6 (Minisci, borono-Minisci, electrophilic aromatic substitution, transition-metal-mediated C–H insertion and C–H deprotonation). We prepared a toolkit of these reagents and studied their reactivity across a wide range of heterocycles (natural products, drugs and building blocks) without recourse to protecting-group chemistry. The reagents can even be used in tandem fashion in a single pot in the presence of water and air.

  研究表明，亚磺酸锌盐可用于将烷基自由基转移到杂环上，从而在与其他固有的碳氢官能化方法互补反应的同时，温和、直接且操作简便地形成具有药物相关性的碳-碳键。含氮杂环在药物中广泛存在，过渡金属介导的交叉偶联反应的一系列进展简化了它们的合成。然而，不依赖预官能化起始材料的实用且选择性的碳氢官能化方法是一个发展不足的领域。在这里，作者报道亚磺酸锌盐可用于将烷基自由基转移到杂环上，从而在与其他固有的碳氢官能化方法正交反应的同时，温和、直接且操作简便地形成具有药物相关性的碳-碳键。含氮杂环化合物对人类健康产生了深远影响，因为这些化学基元存在于大量用于对抗广泛疾病和病理生理条件的药物中。过渡金属介导的交叉偶联的进展简化了这些分子的合成；然而，不依赖预官能化起始材料的具有药物重要性的杂环的碳氢官能化是一个发展不足的领域。不幸的是，杂环的天生特性使其在生物应用中如此受欢迎，例如水溶性和作为配体的能力，这使得它们成为直接化学官能化的具有挑战性的底物。在这里，我们报道亚磺酸锌盐可用于将烷基自由基转移到杂环上，从而在与其他固有的碳氢官能化方法互补反应的同时，温和（中温，50°C或更低）、直接且操作简便地形成具有药物相关性的碳-碳键。我们准备了一套这些试剂，并在不借助于保护基化学的情况下，研究了它们在广泛的杂环（天然产物、药物和构建块）中的反应性。这些试剂甚至可以在有水和空气的情况下单锅串联使用。
• Difluoromethylation Of Unsaturated Compounds
  申请人：The Scripps Research Institute

  公开号：US20150011760A1

  公开（公告）日：2015-01-08

  A reagent for carrying out a difluoromethylation reaction of unsaturated compounds and ring-nitrogen-containing aromatic compounds, a zinc difluoro-methanesulfinate, as well as a method for making the reagent and a method for its use are disclosed.

  本发明公开了一种用于进行不饱和化合物和环氮含芳香化合物的二氟甲基化反应的试剂，即锌二氟甲基磺酰亚胺，以及制备该试剂的方法和使用该试剂的方法。
• A New Reagent for Direct Difluoromethylation
  作者：Yuta Fujiwara、Janice A. Dixon、Rodrigo A. Rodriguez、Ryan D. Baxter、Darryl D. Dixon、Michael R. Collins、Donna G. Blackmond、Phil S. Baran

  DOI：10.1021/ja211422g

  日期：2012.1.25

  Molecular scaffolds containing alkylfluorine substituents are desired in many areas of chemical research from materials to pharmaceuticals. Herein, we report the invention of a new reagent (Zn(SO2CF2H)(2), DFMS) for the innate difluoromethylation of organic substrates via a radical process. This mild, operationally simple, chemoselective, and scalable difluoromethylation method is compatible with a range of nitrogen-containing heteroarene substrates of varying complexity as well as select classes of conjugated pi-systems and thiols. Regiochemical comparisons suggest that the CF2H radical generated from the new reagent possesses nucleophilic character.
• DIFLUOROMETHYLATION OF UNSATURATED COMPOUNDS
  申请人：The Scripps Research Institute

  公开号：EP2785723A1

  公开（公告）日：2014-10-08