1-benzyl-2,3-diethyl-4-methyl-1,2-dihydropyridine | 1016970-57-2

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: 1-benzyl-2,3-diethyl-4-methyl-1,2-dihydropyridine
• 英文别名: 1-benzyl-2,3-diethyl-4-methyl-2H-pyridine
• CAS: 1016970-57-2
• 化学式: C₁₇H₂₃N
• 分子量: 241.376
• InChiKey: RFHLUJZGIUEXDB-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4
• 重原子数：
  18
• 可旋转键数：
  4
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.41
• 拓扑面积：
  3.2
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为反应物：
  描述：

  1-benzyl-2,3-diethyl-4-methyl-1,2-dihydropyridine 在 三乙酰氧基硼氢化钠 、 溶剂黄146 作用下， 以 乙醇 为溶剂， 生成 1-benzyl-5,6-diethyl-4-methyl-3,6-dihydro-2H-pyridine
  参考文献：
  名称：

  通过 C-H 活化-环化-还原级联高度非对映选择性合成四氢吡啶

  摘要：

  已开发出一种可产生高度取代的 1,2,3,6-四氢吡啶的通用反应级联。它包括铑 (I) 催化的 CH 活化-炔烃偶联，然后是电环化和随后的酸/硼氢化物促进的还原。这一一锅法可提供高达 95% 的收率和 >95% 非对映体纯度的目标化合物。

  DOI：

  10.1021/ja2119833
• 作为产物：
  描述：

  3-己炔 、 N-benzyl-N-but-2-enylideneamine 在 [RhCl(coe)2]2 作用下， 以 甲苯 为溶剂， 反应 2.0h， 以98%的产率得到1-benzyl-2,3-diethyl-4-methyl-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

• Synthesis of Isoquinuclidines from Highly Substituted Dihydropyridines via the Diels–Alder Reaction
  作者：Rhia M. Martin、Robert G. Bergman、Jonathan A. Ellman

  DOI：10.1021/ol303040r

  日期：2013.2.1

  A stereo- and regioselective Diels–Alder reaction for the synthesis of highly substituted isoquinuclidines from dihydropyridines and electron-deficient alkenes has been developed. While reactions with activated dienophiles proceed readily under thermal conditions, the use of Lewis acid additives is necessary to facilitate cycloadditions for less reactive alkenes. This procedure affords the target compounds

  已经开发出立体和区域选择性 Diels-Alder 反应，用于从二氢吡啶和缺电子烯烃合成高度取代的异奎宁环。虽然与活化的亲二烯体的反应在热条件下很容易进行，但必须使用路易斯酸添加剂来促进反应性较低的烯烃的环加成。该程序以高产率和非对映选择性提供目标化合物。
• Synthesis of Dihydropyridines and Pyridines from Imines and Alkynes via C−H Activation
  作者：Denise A. Colby、Robert G. Bergman、Jonathan A. Ellman

  DOI：10.1021/ja7104784

  日期：2008.3.1

  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.
• Highly Diastereoselective Synthesis of Tetrahydropyridines by a C–H Activation–Cyclization–Reduction Cascade
  作者：Simon Duttwyler、Colin Lu、Arnold L. Rheingold、Robert G. Bergman、Jonathan A. Ellman

  DOI：10.1021/ja2119833

  日期：2012.3.7

  A versatile reaction cascade leading to highly substituted 1,2,3,6-tetrahydropyridines has been developed. It comprises rhodium(I)-catalyzed C-H activation-alkyne coupling followed by electrocyclization and subsequent acid/borohydride-promoted reduction. This one-pot procedure affords the target compounds in up to 95% yield with >95% diastereomeric purity.

  已开发出一种可产生高度取代的 1,2,3,6-四氢吡啶的通用反应级联。它包括铑 (I) 催化的 CH 活化-炔烃偶联，然后是电环化和随后的酸/硼氢化物促进的还原。这一一锅法可提供高达 95% 的收率和 >95% 非对映体纯度的目标化合物。