1,3-dibenzyl-5-methyl-2-(trimethylsilyl)-1,2-dihydropyridine | 1016970-56-1

• 分子结构分类: 有机化合物 - 有机杂环化合物
• 英文名称: 1,3-dibenzyl-5-methyl-2-(trimethylsilyl)-1,2-dihydropyridine
• CAS: 1016970-56-1
• 化学式: C₂₃H₂₉NSi
• 分子量: 347.575
• InChiKey: FZJKBRHXAGRHAA-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.82
• 重原子数：
  25.0
• 可旋转键数：
  5.0
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.3
• 拓扑面积：
  3.24
• 氢给体数：
  0.0
• 氢受体数：
  1.0

反应信息

• 作为反应物：
  描述：

  1,3-dibenzyl-5-methyl-2-(trimethylsilyl)-1,2-dihydropyridine 在 palladium on activated charcoal air 、 氢气 作用下， 以 2,2,2-三氟乙醇 、 甲苯 为溶剂， 反应 28.0h， 以65 mg的产率得到3-甲基-5-(苯基甲基)吡啶
  参考文献：
  名称：

  Synthesis of Dihydropyridines and Pyridines from Imines and Alkynes via C−H Activation

  摘要：

  A convenient one-pot C-H alkenylation/electrocyclization/aromatization sequence has been developed for the synthesis of highly substituted pyridine derivatives from alkynes and alpha,beta-unsaturated N-benzyl aldimines and ketimines that proceeds through dihydropyridine intermediates. A new class of ligands for C-H activation was developed, providing broader scope for the alkenylation step than could be achieved with previously reported ligands. Substantial information was obtained about the mechanism of the reaction. This included the isolation of a C-H activated complex and its structure determination by X-ray analysis; in addition, kinetic simulations using the Copasi software were employed to determine rate constants for this transformation, implicating facile C-H oxidative addition and slow reductive elimination steps.

  DOI：

  10.1021/ja7104784
• 作为产物：
  描述：

  (E)-N-benzyl-2-methylprop-2-en-1-imine 、 三甲基(3-苯基-1-丙炔基)硅烷 在 [RhCl(coe)2]2 作用下， 以 甲苯 为溶剂， 反应 4.0h， 以81%的产率得到1,3-dibenzyl-5-methyl-2-(trimethylsilyl)-1,2-dihydropyridine
  参考文献：
  名称：

  Synthesis of Dihydropyridines and Pyridines from Imines and Alkynes via C−H Activation

  摘要：

  A convenient one-pot C-H alkenylation/electrocyclization/aromatization sequence has been developed for the synthesis of highly substituted pyridine derivatives from alkynes and alpha,beta-unsaturated N-benzyl aldimines and ketimines that proceeds through dihydropyridine intermediates. A new class of ligands for C-H activation was developed, providing broader scope for the alkenylation step than could be achieved with previously reported ligands. Substantial information was obtained about the mechanism of the reaction. This included the isolation of a C-H activated complex and its structure determination by X-ray analysis; in addition, kinetic simulations using the Copasi software were employed to determine rate constants for this transformation, implicating facile C-H oxidative addition and slow reductive elimination steps.

  DOI：

  10.1021/ja7104784

文献信息

• Unstabilized Azomethine Ylides for the Stereoselective Synthesis of Substituted Piperidines, Tropanes, and Azabicyclo[3.1.0] Systems
  作者：Michael A. Ischay、Michael K. Takase、Robert G. Bergman、Jonathan A. Ellman

  DOI：10.1021/ja312311k

  日期：2013.2.20

  azomethine ylides that can (1) be protonated and reduced with high stereoselectivity to give piperidines, (2) participate in [3 + 2] dipolar cycloaddition to give tropanes, and (3) undergo a Nazarov-like 6-π electrocyclization that upon reduction give 2-azabicyclo[3.1.0] systems.

  密集取代的 2-甲硅烷基-1,2-二氢吡啶的酸处理为反应性偶氮甲碱叶立德提供了一种新的方便的入口，可以 (1) 以高立体选择性质子化和还原得到哌啶，(2) 参与 [3 + 2]偶极环加成得到托烷，和 (3) 经历类似纳扎罗夫的 6-π 电环化，还原后得到 2-氮杂双环 [3.1.0] 系统。