2-methyl-N-benzoyliminopyridinium ylide | 17408-47-8

• 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: 2-methyl-N-benzoyliminopyridinium ylide
• 英文别名: Pyridinium, 1-[(hydroxyphenylmethylene)amino]-2-methyl-, hydroxide, inner salt；(Z)-N-(2-methylpyridin-1-ium-1-yl)benzenecarboximidate
• CAS: 17408-47-8
• 化学式: C₁₃H₁₂N₂O
• 分子量: 212.251
• InChiKey: CDHJGSMLGXTKDG-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.8
• 重原子数：
  16
• 可旋转键数：
  2
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.08
• 拓扑面积：
  39.3
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  2-methyl-N-benzoyliminopyridinium ylide 在 sodium tetrahydroborate 作用下， 以 乙醇 为溶剂， 反应 5.0h， 以45%的产率得到N-(2-methyl-3,6-dihydro-2H-pyridin-1-yl)benzamide
  参考文献：
  名称：

  Synthesis of N-(3,6-dihydro-1(2H)-pyridinyl)benzamides with hyperglycemic-hypoglycemic activity

  摘要：

  A group of N-(3,6-dihydro-1(2H)-pyridinyl)benzamides 7 were synthesized to determine the effect that the position and physicochemical properties of substituents attached to the heterocyclic ring have on blood glucose levels. 5-Methyl-N-(3,6-dihydro-1(2H)-pyridinyl)benzamide 7b was the most active hyperglycemic agent, elevating blood glucose 124% and 116% at 2 and 4 h, respectively, after a 100 mg/kg po dose. The most active hypoglycemic agent was the 4-acetyl analogue 7o, which was about 50% as active as chlorpropamide, lowering blood glucose 19% at 4 h after a 100 mg/kg po dose. A correlation between blood glucose levels and the partition coefficient P was not observed.

  DOI：

  10.1021/jm00384a018
• 作为产物：
  描述：

  碳酸甲丙酯 在 2,4-二硝基苯基羟胺 、 sodium hydroxide 作用下， 以 四氢呋喃 、 水 为溶剂， 反应 21.08h， 生成 2-methyl-N-benzoyliminopyridinium ylide
  参考文献：
  名称：

  Synthesis of 2- and 2,3-Substituted Pyrazolo[1,5-a]pyridines: Scope and Mechanistic Considerations of a Domino Direct Alkynylation and Cyclization of N-Iminopyridinium Ylides Using Alkenyl Bromides, Alkenyl Iodides, and Alkynes

  摘要：

  Direct functionalization and tandem processes have both received considerable recent interest due to their cost and time efficiency. Herein we report the synthesis of difficult to obtain 2-substituted pyrazolo[1,5-a]pyridines through a tandem palladium-catalyzed/silver-mediated elimination/direct functionalization/cyclization reaction involving N-benzoyliminopyridinium ylides. As such, these biologically important molecules are prepared in an efficient, high-yielding manner, only requiring a two-step sequence from pyridine. Aryl-substituted alkenyl bromides and iodides are effective ylide coupling partners. Mechanistic studies led to the use of terminal alkynes, which extended the scope of the reaction to include alkyl substitution on the unsaturated reactive site. The optimization, scope, and mechanistic considerations of the process are discussed.

  DOI：

  10.1021/jo201303x

文献信息

• Copper-Catalyzed Direct Ortho-Alkylation of <i>N</i>-Iminopyridinium Ylides with <i>N</i>-Tosylhydrazones
  作者：Qing Xiao、Lin Ling、Fei Ye、Renchang Tan、Leiming Tian、Yan Zhang、Yuxue Li、Jianbo Wang

  DOI：10.1021/jo4002883

  日期：2013.4.19

  Copper-catalyzed cross-coupling of N-tosylhydrazones with N-iminopyridinium ylides leads to the direct C–H alkylation. This direct C–H bond alkylation transformation uses inexpensive CuI as the catalyst without any ligand. The reaction is operationally simple and conducted under mild conditions, giving the corresponding alkylated pyridines in moderate to good yields. DFT calculation provides insights

  铜催化的N-甲苯磺酰hydr与N-亚氨基吡啶鎓的烷基化物的交叉偶联导致直接的CH烷基化。这种直接的C–H键烷基化转化反应使用廉价的CuI作为催化剂，没有任何配体。该反应操作简单并且在温和的条件下进行，以中等至良好的产率得到相应的烷基化吡啶。DFT计算提供了对反应机理的见解，表明反应是通过Cu卡宾迁移插入过程进行的。
• Catalytic Asymmetric Hydrogenation of <i>N</i>-Iminopyridinium Ylides:  Expedient Approach to Enantioenriched Substituted Piperidine Derivatives
  作者：Claude Y. Legault、André B. Charette

  DOI：10.1021/ja0525298

  日期：2005.6.1

  developed an efficient catalytic enantioselective hydrogenation of pyridine derivatives. Enhanced reactivity was possible by an optimization of the electronic properties of the catalyst through ligand modification. This methodology shows the particular reactivity of N-iminopyridinium ylides that provides access to substituted piperidines in good enantiomeric excesses.

  我们开发了一种高效的吡啶衍生物催化对映选择性氢化。通过配体修饰优化催化剂的电子特性，可以提高反应性。这种方法显示了 N-亚氨基吡啶鎓叶立德的特殊反应性，它提供了获得良好对映体过量的取代哌啶的途径。
• Benzoyl Peroxide Promoted Radical<i>ortho</i>-Alkylation of Nitrogen Heteroaromatics with Simple Alkanes and Alcohols
  作者：Lei Fang、Liangshun Chen、Jianjun Yu、Limin Wang

  DOI：10.1002/ejoc.201403479

  日期：2015.3

  A catalytic amount of benzoyl peroxide (BPO)-initiated cross-dehydrogenative coupling reaction of N-iminopyridine ylides with simple alkanes and alcohols leads to the corresponding 2-alkylpyridines with high regioselectivity in moderate to good yields without an additional reduction step to remove the activated group.

  催化量的过氧化苯甲酰 (BPO) 引发的 N-亚氨基吡啶叶立德与简单烷烃和醇的交叉脱氢偶联反应导致相应的 2-烷基吡啶具有高区域选择性，产率中等至良好，无需额外的还原步​​骤来去除活化团体。
• Highly Efficient Synthesis of <i>O</i>-(2,4-Dinitrophenyl)hydroxylamine. Application to the Synthesis of Substituted <i>N</i>-Benzoyliminopyridinium Ylides
  作者：Claude Legault、André B. Charette

  DOI：10.1021/jo034456l

  日期：2003.9.1

  efficient two-step synthesis of O-(2,4-dinitrophenyl)hydroxylamine is described along with a comparison of its aminating efficiency with O-mesitylenesulfonylhydroxylamine (MSH). It was used in an expedient N-amination/benzoylation procedure involving various substituted pyridines, leading to polysubstituted N-benzoyliminopyridinium ylides, and the scope of its amination power was studied.

  描述了一种有效的两步合成O-（2,4-二硝基苯基）羟胺的方法，并比较了其与O-次甲基亚磺酰基羟胺（MSH）的胺化效率。它被用于方便的N-氨基化/苯甲酰化过程，涉及各种取代的吡啶，导致多取代的N-苯并亚氨基吡啶基吡啶化，并研究了其胺化能力的范围。
• 10.1021/jacs.4c03713
  作者：Luo, Jiajing、Zhou, Qingyang、Xu, Zhou、Houk、Zheng, Ke

  DOI：10.1021/jacs.4c03713

  日期：——

  We present an efficient one-pot photochemical skeletal editing protocol for the transformation of pyridines into diverse bicyclic pyrazolines and pyrazoles under mild conditions. The method requires no metals, photocatalysts, or additives and allows for the selective removal of specific carbon atoms from pyridines, allowing for unprecedented versatility. Our approach offers a convenient and efficient

  我们提出了一种有效的一锅光化学骨架编辑方案，用于在温和条件下将吡啶转化为多种双环吡唑啉和吡唑。该方法不需要金属、光催化剂或添加剂，并且可以选择性地从吡啶中去除特定的碳原子，从而实现了前所未有的多功能性。我们的方法通过替换核心吡啶骨架，为复杂药物分子的后期修饰提供了一种方便有效的方法。此外，我们已经成功地在停流和流动化学系统中扩展了该过程，展示了其对复杂转化的适用性，例如狄尔斯-阿尔德反应、氢化、[3 + 2]环加成和赫克反应。通过控制实验和 DFT 计算，我们深入了解了这种骨架编辑协议的机制基础。

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