一个数据库的固体和电子属性的异基替代剂的heteroaryl替代剂
Turki M Alturaifi1, Grace E Scofield1, Shengchun Wang1
1Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania, 15260, USA.
Scientific data
|July 30, 2025
概括
我们创建了HARD,这是一个数据库,包含超过31500个具有计算立体和电子性质的异质替代物. 本资源有助于理解药物发现和材料科学中的结构-活性关系.
科学领域:
- 有机化学 有机化学
- 计算化学的计算化学
- 药用化学 医学化学
背景情况:
- 在药物发现,材料科学和催化过程中,异基替代剂至关重要.
- 固态和电子性质的定量描述符对于结构-活性关系和反应性预测至关重要.
研究的目的:
- 介绍HeteroAryl描述器 (HArD) 数据库,这是对异烯替代剂属性的全面资源.
- 为超过31500种异基替代物提供DFT计算的立体和电子描述符.
主要方法:
- 使用密度函数理论 (DFT) 计算来计算描述符.
- 包括多样化的异基系统 (5和6个环,化系统) 与各种区域异构体和额外的替代物.
- 计算了65个描述符,包括斯特里莫尔参数,埋藏体积,原子电荷,HOMO/LUMO能量/系数和HOMA值.
主要成果:
- 开发了HArD数据库,其中包含>31,500种异基替代剂,以及大量的固体和电子数据.
- 基于计算的pKa值,生成了哈梅特型异构替代常量 (σHet).
- 该数据库涵盖了对异基替代剂的广泛化学空间.
结论:
- 哈德数据库提供了对 heteroaryl 化合物的基本定量描述符.
- 该资源促进了结构-活性关系研究和各种化学领域的反应性预测.
- 开发的 σ Het 常数扩展了哈梅特类型分析的适用性到 heteroaryl 系统.
相关概念视频
Stability of Substituted Cyclohexanes
13.0K
This lesson discusses the stability of substituted cyclohexanes with a focus on energies of various conformers and the effect of 1,3-diaxial interactions.
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...
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...
13.0K
Relative Stabilities of Alkenes
14.3K
The relative stability of alkenes can be determined by comparing their heats of hydrogenation. The lower heat of hydrogenation indicates the more stable alkene. The three main factors determining the relative stability of alkenes are i) the number of substituents attached to the double-bond carbon atoms, ii) hyperconjugation, and iii) the stereochemistry of the double bond.
14.3K
Inductive Effects on Chemical Shift: Overview
1.3K
The protons in unsubstituted alkanes are strongly shielded with chemical shifts below 1.8 ppm. Methine, methylene, and methyl protons appear at approximately 1.7, 1.2 and 0.7 ppm, while the proton signal from methane appears at 0.23 ppm. An electronegative substituent, such as chlorine, withdraws the electron density from the protons, increasing their chemical shift. Progressive substitution of the hydrogens in methane by chlorine shifts the proton signals increasingly downfield, to 3.05 ppm in...
1.3K
Directing and Steric Effects in Disubstituted Benzene Derivatives
3.2K
When disubstituted benzenes undergo electrophilic substitution, the product distribution depends on the directing effect of both substituents. When the directing effects of both substituents reinforce each other, a single product is obtained. For example, bromination of p-nitrotoluene occurs ortho to the methyl group and meta to the nitro group, which is the same position, resulting in a single product. However, if the directing effects of the two groups oppose each other, the...
3.2K
Basicity of Heterocyclic Aromatic Amines
6.3K
Heterocyclic amines, where the N atom is a part of an alicyclic system, are similar in basicity to alkylamines. Interestingly, the heterocyclic amine having a nitrogen atom as part of an aromatic ring has much less basicity than its corresponding alicyclic counterpart. For this reason, as presented in Figure 1, piperidine (pKb = 2.8) is significantly more basic than pyridine (pKb = 8.8).
6.3K
Polymer Classification: Stereospecificity
2.6K
Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...
2.6K


