1-(3-Methyl-1-pyrrolidin-1-ylbutyl)pyrrolidine | 1608182-12-2

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡咯烷类
• 英文名称: 1-(3-Methyl-1-pyrrolidin-1-ylbutyl)pyrrolidine
• CAS: 1608182-12-2
• 化学式: C₁₃H₂₆N₂
• 分子量: 210.363
• InChiKey: SCBVEGLCIWACSJ-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.1
• 重原子数：
  15
• 可旋转键数：
  4
• 环数：
  2.0
• sp3杂化的碳原子比例：
  1.0
• 拓扑面积：
  6.5
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  1-(3-Methyl-1-pyrrolidin-1-ylbutyl)pyrrolidine 以 氘代二甲亚砜 、 氘代苯 为溶剂， 生成
  参考文献：
  名称：

  Importance of the Electron Correlation and Dispersion Corrections in Calculations Involving Enamines, Hemiaminals, and Aminals. Comparison of B3LYP, M06-2X, MP2, and CCSD Results with Experimental Data

  摘要：

  While B3LYP, M06-2X, and MP2 calculations predict the Delta G degrees values for exchange equilibria between enamines and ketones with similar acceptable accuracy, the M06-2X/6-311+G(d,p) and MP2/6-311+G(d,p) methods are required for enamine formation reactions (for example, for enamine 5a, arising from 3-methylbutanal and pyrrolidine). Stronger disagreement was observed when calculated energies of hemiaminals (N,O-acetals) and aminals (N,N-acetals) were compared with experimental equilibrium constants, which are reported here for the first time. Although it is known that the B3LYP method does not provide a good description of the London dispersion forces, while M06-2X and MP2 may overestimate them, it is shown here how large the gaps are and that at least single-point calculations at the CCSD(T)/6-31+G(d) level should be used for these reaction intermediates; CCSD(T)/6-31+G(d) and CCSD(T)/6-311+G(d,p) calculations afford Delta G degrees values in some cases quite close to MP2/6-311+G(d,p) while in others closer to M06-2X/6-311+G(d,p). The effect of solvents is similarly predicted by the SMD, CPCM, and IEFPCM approaches (with energy differences below 1 kcal/mol).

  DOI：

  10.1021/acs.joc.5b01814
• 作为产物：
  描述：

  异戊醛 在 对甲苯磺酸 作用下， 以 氘代二甲亚砜 、 环己烷 为溶剂， 反应 5.0h， 生成 1-(3-Methyl-1-pyrrolidin-1-ylbutyl)pyrrolidine
  参考文献：
  名称：

  Importance of the Electron Correlation and Dispersion Corrections in Calculations Involving Enamines, Hemiaminals, and Aminals. Comparison of B3LYP, M06-2X, MP2, and CCSD Results with Experimental Data

  摘要：

  While B3LYP, M06-2X, and MP2 calculations predict the Delta G degrees values for exchange equilibria between enamines and ketones with similar acceptable accuracy, the M06-2X/6-311+G(d,p) and MP2/6-311+G(d,p) methods are required for enamine formation reactions (for example, for enamine 5a, arising from 3-methylbutanal and pyrrolidine). Stronger disagreement was observed when calculated energies of hemiaminals (N,O-acetals) and aminals (N,N-acetals) were compared with experimental equilibrium constants, which are reported here for the first time. Although it is known that the B3LYP method does not provide a good description of the London dispersion forces, while M06-2X and MP2 may overestimate them, it is shown here how large the gaps are and that at least single-point calculations at the CCSD(T)/6-31+G(d) level should be used for these reaction intermediates; CCSD(T)/6-31+G(d) and CCSD(T)/6-311+G(d,p) calculations afford Delta G degrees values in some cases quite close to MP2/6-311+G(d,p) while in others closer to M06-2X/6-311+G(d,p). The effect of solvents is similarly predicted by the SMD, CPCM, and IEFPCM approaches (with energy differences below 1 kcal/mol).

  DOI：

  10.1021/acs.joc.5b01814

文献信息

• Transfer of 1-Alkenyl Groups between Secondary Amines. Relative Stability and Reactivity of Enamines from Popular Organocatalysts
  作者：Héctor Carneros、Dani Sánchez、Jaume Vilarrasa

  DOI：10.1021/ol501044u

  日期：2014.6.6

  Enamines from 3-methylbutanal and several Pro- and Phe-derived secondary amines were prepared in DMSO-d6, CD3CN, and CDCl3. For the first time, the relative thermodynamic stabilities of these and other enamines were compared, and rapid exchanges of 1-alkenyl groups were demonstrated. Competition experiments showed that the most favored enamines (without significant steric inhibition of resonance) react

  在DMSO- d 6，CD 3 CN和CDCl 3中制备了3-甲基丁醛的烯胺以及几种Pro和Phe衍生的仲胺。第一次，比较了这些和其他烯胺的相对热力学稳定性，并证明了1-烯基的快速交换。竞争实验表明，最喜欢的烯胺（对共振没有明显的空间抑制作用）与亲电子试剂反应更快。