大规模结构修改与保存的形状:对模型β转中的delta(3) 融合的烯烯的分析
Guillaume Jeannotte1, William D Lubell
1Département de chimie, Université de Montréal, C.P. 6128, Succursale CentreVille, Montréal, Québec, Canada H3C 3J7.
Journal of the American Chemical Society
|November 4, 2004
概括
研究人员探索了化Delta3-arylproline如何影响质结构. 他们发现,pyrrolo-proline (PyPro) 是beta转中适合替代proline的替代品,在结构-活性研究中保持类似的二次结构.
科学领域:
- 药用化学 医学化学
- 结构生物学 结构生物学
- 有机合成 有机合成
背景情况:
- 在和蛋白质结构中至关重要,影响着构造和生物活性.
- 了解氨酸的作用需要研究其结构-活性关系 (SAR) 调查的类似物.
- 化类类似物为探测的行为提供了独特的结构修改.
研究的目的:
- 为了研究一种新型的化プロ林模拟物,Delta3-arylproline,对结构的构造影响.
- 为了比较含有 pyrrolo-proline (PyPro) 的的结构性质与含有 proline (Pro) 的的结构性质.
- 评估PyPro在类设计中作为保守的类替代品的适用性.
主要方法:
- 合成包含proline和pyrrolo-proline的类化合物.
- 使用核重复效应光谱学 (NOESY) 对形状的比较分析.
- 对cis/trans-同位素群体和DMSO定位曲线的评估.
主要成果:
- 皮洛洛 (PyPro) 已成功合成并纳入模型β转中.
- 含有PyPro的具有与 (Pro) 类似的构造性质.
- DMSO定位曲线,cis/trans-isomer比率和NOESY数据证实了PyPro替代的保守性.
结论:
- 罗罗 (PyPro) 在结构中作为一种保守的类型,特别是在β转中.
- 当使用PyPro时,的结构完整性在很大程度上保持不变,从而最大限度地减少对二次结构的改变.
- 对于含有素的的结构-活性关系研究,PyPro是一个有价值的工具,它允许在没有显著的构造变化的情况下进行微妙的修改.
相关概念视频
02:00Molecular Models
Physical models representing molecular architectures of chemical compounds play essential roles in understanding chemistry. The use of molecular models makes it easier to visualize the structures and shapes of atoms and molecules.
02:06Newman Projections
Different notations are used to represent the three-dimensional structure of molecules on two-dimensional surfaces. One of the most commonly used representations is the dash-wedge formula. The dashed wedges, solid wedges, and the plane lines indicate the groups situated behind the plane, coming out of the plane, and in the plane, respectively.
The organic molecules rotate across the single bonds leading to numerous temporary three-dimensional structures of varying energy known as conformers.
The organic molecules rotate across the single bonds leading to numerous temporary three-dimensional structures of varying energy known as conformers.
02:18Conformations of Ethane and Propane
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Staggered conformation is a low energy and more stable conformation with the C-H bonds on the front carbon placed at 60°dihedral angles relative to the C-H bonds on the back carbon, leading to a reduced torsional strain. In staggered ethane, the...
Staggered conformation is a low energy and more stable conformation with the C-H bonds on the front carbon placed at 60°dihedral angles relative to the C-H bonds on the back carbon, leading to a reduced torsional strain. In staggered ethane, the...
02:11Conformations of Cyclohexane
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02:30Stability of Substituted Cyclohexanes
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For example, in...
The two chair conformations of cyclohexanes undergo rapid interconversion at room temperature. Both forms have identical energies and stabilities, each comprising equal amounts of the equilibrium mixture. Replacing a hydrogen atom with a functional group makes the two conformations energetically non-equivalent.
For example, in...
01:28Stability of Conjugated Dienes
Introduction
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A comparison of the enthalpies of hydrogenation of dienes reveals that conjugated dienes release less heat on hydrogenation, rendering them more stable than their nonconjugated analogs.