3-(N,N-dimethylamino)-2-phenylpyridine | 37941-25-6

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡啶及其衍生物
• 英文名称: 3-(N,N-dimethylamino)-2-phenylpyridine
• 英文别名: 2-Phenyl-3-dimethylamino-pyridin；dimethyl-(2-phenyl-pyridin-3-yl)-amine；Dimethylaminophenyl-pyridine；N,N-dimethyl-2-phenylpyridin-3-amine
• CAS: 37941-25-6
• 化学式: C₁₃H₁₄N₂
• 分子量: 198.268
• InChiKey: NIRLLELPSNJHKP-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.6
• 重原子数：
  15
• 可旋转键数：
  2
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.15
• 拓扑面积：
  16.1
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  3,5-bis(trifluoromethyl)phenyl azide 、 3-(N,N-dimethylamino)-2-phenylpyridine 在 silver hexafluoroantimonate 、 dichloro(pentamethylcyclopentadienyl)rhodium (III) dimer 作用下， 以 1,2-二氯乙烷 为溶剂， 反应 12.0h， 以70%的产率得到2-(2-(3,5-bis(trifluoromethyl)phenylamino)phenyl)-N,N-dimethylpyridin-3-amine
  参考文献：
  名称：

  Hydrogen-Bond-Assisted Controlled C–H Functionalization via Adaptive Recognition of a Purine Directing Group

  摘要：

  We have developed the Rh-catalyzed selective C-H functionalization of 6-arylpurines, in which the purine moiety directs the C-H bond activation of the aryl pendant. While the first C-H amination proceeds via the N1-chelation assistance, the subsequent second C-H bond activation takes advantage of an intramolecular hydrogen-bonding interaction between the initially formed amino group and one nitrogen atom, either N1 or N7, of the purinyl part. Isolation of a rhodacycle intermediate and the substrate variation studies suggest that N1 is the main active site for the C-H functionalization of both the first and second amination in 6-arylpurines, while N7 plays an essential role in controlling the degree of functionalization serving as an intramolecular hydrogen-bonding site in the second amination process. This pseudo-Curtin-Hammett situation was supported by density functional calculations, which suggest that the intramolecular hydrogen-bonding capability helps second amination by reducing the steric repulsion between the first installed ArNH and the directing group.

  DOI：

  10.1021/ja4118472
• 作为产物：
  描述：

  聚合甲醛 、 2-苯基-3-氨基吡啶 在 sodium cyanoborohydride 、 溶剂黄146 作用下， 反应 20.0h， 以154 mg的产率得到3-(N,N-dimethylamino)-2-phenylpyridine
  参考文献：
  名称：

  Hydrogen-Bond-Assisted Controlled C–H Functionalization via Adaptive Recognition of a Purine Directing Group

  摘要：

  We have developed the Rh-catalyzed selective C-H functionalization of 6-arylpurines, in which the purine moiety directs the C-H bond activation of the aryl pendant. While the first C-H amination proceeds via the N1-chelation assistance, the subsequent second C-H bond activation takes advantage of an intramolecular hydrogen-bonding interaction between the initially formed amino group and one nitrogen atom, either N1 or N7, of the purinyl part. Isolation of a rhodacycle intermediate and the substrate variation studies suggest that N1 is the main active site for the C-H functionalization of both the first and second amination in 6-arylpurines, while N7 plays an essential role in controlling the degree of functionalization serving as an intramolecular hydrogen-bonding site in the second amination process. This pseudo-Curtin-Hammett situation was supported by density functional calculations, which suggest that the intramolecular hydrogen-bonding capability helps second amination by reducing the steric repulsion between the first installed ArNH and the directing group.

  DOI：

  10.1021/ja4118472

文献信息

• Electrochemical reactor dictates site selectivity in N-heteroarene carboxylations
  作者：Guo-Quan Sun、Peng Yu、Wen Zhang、Wei Zhang、Yi Wang、Li-Li Liao、Zhen Zhang、Li Li、Zhipeng Lu、Da-Gang Yu、Song Lin

  DOI：10.1038/s41586-022-05667-0

  日期：2023.3.2

  electrolysis setup gives rise to divergent site selectivity: a divided electrochemical cell leads to C5-carboxylation, whereas an undivided cell promotes C4-carboxylation. The undivided cell reaction is proposed to operate via a paired electrolysis mechanism9,10, wherein both cathodic and anodic events play critical roles in altering the site selectivity. Specifically, anodically-generated iodine preferentially

  吡啶和相关的N-杂芳烃常见于药物、农用化学品和其他生物活性化合物中1,2。位点选择性 C-H 功能化将提供一种直接制备这些药物活性产品的方法3,4,5。例如，烟酸衍生物可以通过 C-H 羧化来制备，但这仍然是一个难以捉摸的转化6,7,8。在这里，我们描述了使用CO 2直接羧化吡啶的电化学策略的开发。电解设置的选择会产生不同的位点选择性：分开的电化学电池导致 C5-羧化，而未分开的电池则促进 C4-羧化。建议通过配对电解机制9,10进行整体电池反应，其中阴极和阳极事件在改变位点选择性方面发挥着关键作用。具体来说，阳极产生的碘优先通过氢原子转移与C4-羧化途径中的关键自由基阴离子中间体反应，从而通过Curtin-Hammett原理11改变反应选择性。转化范围扩大到多种N-杂芳烃，包括双吡啶和三联吡啶、嘧啶、吡嗪和喹啉。